ADC/DAC
Produkte (2518)
MAX12529ETK+ - Dual 96Msps 12-Bit ADC | Maxim Integrated
The Maxim Integrated MAX12529ETK+ is a dual, 96Msps, 12-bit analog-to-digital converter (ADC) featuring fully differential wideband track-and-hold (T/H) inputs and internal quantizers, housed in a 68-pin thin QFN (TQFN) package. Operating from a single 3.3V supply, it delivers high dynamic performance optimized for low power, small size, and demanding intermediate frequency (IF) and baseband sampling applications. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous analog voltage signals into discrete digital codes. Within the broader semiconductor taxonomy, the MAX12529 belongs to the data-converter category, which sits between analog front-end signal conditioning and digital signal processing blocks. The 12-bit resolution offers 4096 discrete codes (LSB size = FS/4096), making the part suitable for communications and imaging systems where moderate dynamic range and high sampling speed are required. Dual-channel integration reduces board area by combining two synchronized converters in one package. Key features include 96Msps sampling rate per channel, 12-bit resolution, 3.3V single-supply operation, fully differential wideband T/H inputs, and low-voltage/low-power characteristics. According to the Maxim datasheet, the part is optimized for IF and baseband sampling in wireless infrastructure, with internal quantizers that maintain SNR performance at high input frequencies. The 68-pin TQFN package provides excellent thermal dissipation through an exposed pad. The MAX12529 utilizes a pipelined multi-stage ADC architecture with digital error correction to achieve low spurious content at high sampling rates. Internal reference and clock buffering simplify board-level design, while the wideband differential input structure accommodates single-ended-to-differential transformer or driver front ends. The combined architecture supports dual-channel synchronous sampling required for I/Q signal processing in quadrature demodulation paths. Typical applications include wireless base-station receiver IF sampling, cable-modem downstream QAM demodulators, medical imaging ultrasound front-ends, radar digitizers, and portable instrumentation. The dual channel also suits MIMO radio designs and diversity receivers where matched-channel sampling is critical. In radar and ultrasound, the wideband differential input preserves harmonic content needed for matched-filter pulse compression. When designing with the MAX12529, ensure the analog input drive network provides the correct common-mode voltage (typically 1.65V at mid-scale for 3.3V supply) and presents low source impedance across the Nyquist bandwidth. Decouple AVDD and DVDD rails separately near the package pins to prevent digital switching noise from coupling into the analog front end, and bond the exposed thermal pad to a continuous ground plane for thermal dissipation. This page synthesizes distributor pricing, parametric comparison data, drop-in alternatives from the same Maxim family, and practical design notes not consolidated in the manufacturer datasheet, giving engineers a faster path from selection to prototype.
MAX1254AEUE+T - 12-Bit 10-Ch ADC System Monitor | Maxim Integrated
The Maxim Integrated MAX1254AEUE+T is a stand-alone, 10-channel, 12-bit system monitor with internal temperature sensor and VDD monitor, housed in a 16-pin TSSOP package. It operates from a 4.5V to 5.5V analog supply, delivers 12-bit resolution across 10 analog input channels, and integrates an on-chip temperature sensor plus a dedicated VDD monitor input. The internal 4.096V reference simplifies external circuitry and supports ratiometric conversion. A system monitor (or supervisory ADC) is a type of mixed-signal data-acquisition IC that combines an analog-to-digital converter with housekeeping functions such as power-supply supervision, temperature sensing, and fault thresholds. It sits hierarchically under data acquisition (DAQ) -> ADC -> mixed-signal IC -> power management IC, and is typically deployed as the analog front end for board-level telemetry and health monitoring. Compared with discrete ADC plus thermistor plus supervisor solutions, a system monitor integrates these functions into one die surface to save PCB area and BOM cost. Key features include 12-bit resolution, 10 single-ended analog inputs, an internal 4.096V voltage reference, integrated temperature sensor covering -40 to +85 C with +/-2 C typical accuracy, dedicated VDD monitor input, and AutoShutdown reducing supply current to less than 8 uA at low sampling rates. The device also supports 94 ksps maximum sampling rate per channel in single-channel conversion mode, with hardware-configurable single-ended inputs and an SPI-compatible serial interface. Architecturally the MAX1254AEUE+T uses a successive-approximation register (SAR) ADC core with input track-and-hold, on-chip reference buffer, and a sequencer that automates channel scanning. A state machine plus on-chip result RAM enables stand-alone operation without continuous host intervention, which is why Maxim labels it "stand-alone". The internal temperature sensor uses a bandgap-derived proportional-to-absolute-temperature (PTAT) cell digitized by the same SAR converter through an internal MUX. Typical applications include telecom equipment health monitoring, server board telemetry, industrial control panel supervision, basestation power amplifier thermal monitoring, and battery-charging voltage and temperature monitoring. The 5V analog supply and 12-bit resolution make it well suited for 0-5V industrial transducer signal chains. When designing with this device, ensure the analog supply is well decoupled with a 10 uF bulk plus 0.1 uF ceramic cap at AVDD, and provide a logic-level translation scheme if interfacing to 3.3V microcontrollers on DIN. The internal reference is stable but should be bypassed externally with a 1 uF to 10 uF capacitor on REF for low-noise operation. This page synthesizes distributor pricing, same-package drop-in alternatives from the Maxim MAX1253/MAX1254 family, design notes, and a side-by-side parametric comparison not found in a single manufacturer datasheet view.
MAX12553ETL+G3U - 14-Bit 65Msps 3.3V ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX12553ETL+G3U is a 3.3V, 14-bit, 65Msps analog-to-digital converter (ADC) with a fully differential wideband track-and-hold (T/H) input amplifier and a low-noise quantizer core, housed in a 40-pin thin QFN (HVQCCN, 6mm x 6mm x 0.8mm) package with exposed paddle. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog input voltage and produces a discrete digital code proportional to that voltage. High-speed 14-bit ADCs such as the MAX12553 are positioned within the data-converter hierarchy between 12-bit general-purpose parts and 16-bit precision parts, occupying the sweet spot for communications, medical imaging, and instrumentation applications where dynamic range beyond 12 bits is required but full 16-bit linearity is not essential. The MAX12553 operates from a single 3.3V supply, simplifying system power-rail design relative to ADCs requiring 5V analog and 3.3V digital rails. Key specifications include a 65Msps maximum sampling rate, 14-bit resolution, single 3.3V analog supply, internal 2.048V bandgap reference (or optional external reference), and a flexible CMOS-compatible digital interface. The fully differential input stage provides excellent common-mode noise rejection and supports both single-ended-to-differential and fully differential analog front-end topologies. The internal duty-cycle equalizer (DCE) compensates for clock duty-cycle distortion, simplifying timing closure with non-50% clock sources. Architecturally, the MAX12553 uses a pipelined multi-stage converter topology that delivers 14-bit linearity at 65Msps while maintaining low latency suitable for multiplexing multi-channel systems. The wideband T/H front-end handles input signals up to and beyond the Nyquist frequency, and the internal reference structure allows the user to select between the on-chip 2.048V bandgap or an external reference for gain calibration or ratiometric measurement. The device supports both single-ended and differential input clock drive modes. Typical applications include IF/baseband digitizing in wireless infrastructure, medical ultrasound beamformers, portable instrumentation, CCD imaging, and multichannel data acquisition systems. The wide input bandwidth and differential input make it well suited to drive ADCs directly from SAW filter outputs or transformer-coupled IF stages without an additional pre-amplifier. When designing with the MAX12553, place the exposed paddle (EP) on a continuous ground pour with multiple thermal vias to achieve the rated 14-bit performance and ensure specified INL/DNL across the industrial temperature range. Decouple AVDD and DVDD separately with low-ESR 0.1uF and 10uF ceramic capacitors placed as close as possible to the supply pins, and route the analog and digital ground returns to a single-point star ground beneath the device. This page synthesizes distributor pricing, drop-in alternatives sourced from the MAX12553 family, and practical design notes not found in the manufacturer datasheet alone.
MAX12553ETL+TG3U - 14-Bit 65Msps 3.3V ADC | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX12553ETL+TG3U is a 14-bit, 65Msps, 3.3V pipelined analog-to-digital converter (ADC) housed in a 40-pin thin QFN package with exposed pad (TQFN-EP, 6mm x 6mm x 0.8mm). It integrates an on-chip track-and-hold and reference, and supports both single-ended and differential analog inputs, simplifying front-end design and reducing external component count. The internal duty-cycle equalizer (DCE) accepts a wide range of clock duty cycles, easing timing closure with common FPGA or ASIC sources. An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that samples continuous analog voltage and quantizes it into a discrete digital code. Pipelined ADCs use multiple cascaded low-resolution stages to achieve high sample rates (tens to hundreds of Msps) at moderate resolution (10-16 bits), and they sit within the IC hierarchy: data converter -> ADC -> pipelined ADC -> mixed-signal IC -> semiconductor. The MAX12553 is a representative member of this family, optimized for low power (3.3V supply) and small footprint. Key specifications include 14-bit resolution, 65Msps maximum sample rate, a 3.3V analog/digital supply, and an LVDS-compatible 14-bit parallel digital interface. The differential analog input is internally biased with a common-mode reference, which removes the need for an external op-amp level shifter in many applications. The integrated bandgap reference and input track-and-hold minimize external BOM, while the on-chip duty-cycle equalizer corrects non-50% clocks. The MAX12553 architecture uses a multi-stage pipelined core with per-stage error correction, achieving low integral nonlinearity (INL) and differential nonlinearity (DNL) suitable for communications, imaging, and instrumentation. The LVDS output bus reduces EMI relative to CMOS alternatives at the 65Msps data rate, simplifying PCB routing and reducing ground-bounce coupling into the analog front end. Typical applications include high-speed digital oscilloscopes and data acquisition front ends, IF-sampling software-defined radio receivers, medical ultrasound beamformers, CCD/cis imaging pipelines, and baseband digitization in point-to-point microwave backhaul links. The wide input bandwidth and low aperture jitter make it well suited for undersampling IFs in communications receivers. When designing with the MAX12553, drive the analog input with a low-noise differential amplifier (e.g., a fully-differential op-amp such as the MAX4108) and provide a low-jitter clock source to preserve SNR at high input frequencies. Decouple AVDD and DVDD with separate 0.1uF and 10uF capacitor networks placed close to the supply pins, and tie the exposed pad (EP) to a clean analog ground plane for thermal dissipation and ground reference integrity. This page synthesizes the manufacturer datasheet, distributor pricing, drop-in same-package alternatives, and practical design notes not found in the datasheet alone, providing a self-contained reference for component evaluation, sourcing, and PCB bring-up.
MAX12554ETL+D - 14-Bit 80Msps 3.3V ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX12554ETL+D is a 14-bit, 80 Msps analog-to-digital converter operating from a single 3.3 V supply, offered in a 40-pin TQFN-EP (6 x 6 mm, 0.80 mm height) with the package code T4066-3. It is specified for direct IF sampling up to 400 MHz with excellent dynamic performance, providing 72.4 dB SNR and 86.2 dBc SFDR at fIN = 3 MHz, and 70.9 dB SNR and 82.5 dBc SFDR at fIN = 175 MHz, plus a low noise floor of -74.8 dBFS. The +D suffix denotes the tape-and-reel, RoHS-compliant lead-free shipping option. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that quantizes a continuous analog input into a discrete digital code. The MAX12554 belongs to the successive-approximation (SAR) and pipelined ADC product family, sitting in the broader hierarchy of data converter -> mixed-signal IC -> semiconductor. Its high sampling rate places it in the mid-speed tier between general-purpose SAR ADCs (>1 Msps but <40 Msps) and high-speed pipeline ADCs (>100 Msps), making it a transition device optimized for IF-sampling communications receivers. Key differentiating specifications include the 80 Msps sample rate, 14-bit resolution, 3.3 V single-supply operation, integrated input buffer, and pin-compatibility with the MAX12555 (95 Msps, 14-bit) and MAX12556 (65 Msps, 14-bit) family members. The TQFN-EP package exposes a thermal pad that reduces theta-JA, supporting continuous operation across the -40 C to +85 C industrial temperature range. Architecturally, the MAX12554 uses a differential pipelined input stage followed by a digital error-correction block, with internal bandgap reference and proprietary low-distortion track-and-hold. The 3.3 V analog supply can be derived from a low-noise LDO such as the MAX8881 or ADP3334 to preserve the stated SNR/SFDR performance. Typical applications include cellular base-station IF digitizers, cable-modem upstream/downstream receivers, medical ultrasound beamformers, and high-end instrumentation digitizers. Its 80 Msps rate at 14-bit resolution is well-suited for undersampling IF signals in superheterodyne receivers where the ADC aliases a high-frequency band down to baseband. When designing with this part, drive the analog input differentially to fully realize the 86 dBc SFDR; single-ended drive typically loses 8-10 dB of distortion performance. Place the analog and digital ground planes as a single split plane joined under the IC, and decouple AVDD/DVDD with 1 uF and 0.1 uF ceramics within 5 mm of each supply pin. This page synthesizes distributor pricing, pin-compatible same-family alternatives (MAX12555ETL+D, MAX12556ETL+D), drop-in cross-brand equivalents, and practical PCB layout guidance not collected in the manufacturer datasheet.
MAX12554ETL/GG8 - 14-Bit 80Msps 3.3V ADC, TQFN-40 | Maxim
The Maxim Integrated (now Analog Devices) MAX12554ETL/GG8 is a 14-bit, 80Msps, low-power analog-to-digital converter (ADC) with a single 3.3V supply, housed in a 40-pin TQFN (6x6 mm, 0.80 mm height) package. It features a pipelined architecture optimized for direct IF sampling to 400 MHz, making it suitable for communications, baseband, and intermediate-frequency digitisation where aliasing of higher-bandwidth content is desired. According to the manufacturer datasheet, the part delivers 72.4 dBFS SNR and 86.2 dBc SFDR at 3 MHz input, and 70.9 dBFS SNR and 82.5 dBc SFDR at 175 MHz input, with a low -74.8 dBFS noise floor. An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that samples continuous analog input voltages and converts them into discrete digital codes. In the component taxonomy it belongs to data converters, which sit under signal conditioning and interface ICs in the broader mixed-signal/power management hierarchy. High-speed 14-bit ADCs such as the MAX12554 are typically placed between an analog front-end (amplifier, filter, balun) and a digital signal processor (DSP, FPGA, or ASIC), translating modulated IF/RF signals into the digital domain for demodulation, equalization, or analysis. Key features of the MAX12554 include a flexible reference structure that accepts the internal 2.048 V bandgap reference or an externally applied reference, an offset-binary output code, parallel CMOS-compatible digital outputs, and a 300 uW power-down mode for battery-aware idle states. The part operates from -40C to +85C industrial temperature range and is designed for 3.3V single-supply operation, simplifying board power tree design relative to older 5V ADCs. Typical applications include wireless base-station receivers, IF-sampling software-defined radio (SDR), portable instrumentation, medical imaging front-ends, and ultrasound beam-forming. Its 400 MHz direct-IF capability and 14-bit resolution make it a strong fit for multi-carrier GSM/EDGE, CDMA, and WCDMA receive chains where spurious-free dynamic range directly impacts demodulation error-vector magnitude (EVM). A key design consideration: provide a low-jitter sampling clock and a properly bypassed analog supply - the SNR floor of 72.4 dBFS is only achievable with the analog and digital ground planes properly partitioned, as described in the datasheet's layout guidelines. Decoupling should include 0.1 uF + 10 uF ceramic capacitors within 5 mm of the AVDD and DVDD pins. The /GG8 suffix indicates the part is supplied on a 13-inch tape-and-reel (reel code GG8) carrying 2,500 units per reel. Note: the MAX12554ETL/GG8 is listed as obsolete by some distributors - verify lifecycle status and consider the active MAX12554ETL+ variant as the recommended replacement for new designs. This page synthesizes distributor pricing, drop-in alternatives drawn from the same Maxim/ADI family, and practical layout/clocking notes not found in the bare datasheet.
MAX12558ETK+ - Dual 80Msps 14-Bit IF/Baseband ADC | Maxim Integrated
The Analog Devices / Maxim Integrated MAX12558ETK+ is a dual, 3.3V, 14-bit, 80 Msps analog-to-digital converter (ADC) with fully differential wideband track-and-hold (T/H) inputs driving internal pipelined quantizers, housed in a 68-pin TQFN (10x10 mm) package. It features two simultaneous 80 Msps conversion channels optimized for broadband IF and baseband digitization, a separate digital I/O supply rail from 1.7V to 3.6V for flexible logic interfacing, and pin-selectable output formatting (two's complement or Gray code). An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous analog input voltages into discrete digital output codes, enabling digital signal processing of real-world signals. The MAX12558 belongs to the IF/baseband sampling ADC class, which sits architecturally between high-speed RF sampling ADCs (gigasample range) and general-purpose successive-approximation ADCs (kilosample range). Within the power-management and data-conversion IC taxonomy, IF-sampling ADCs like the MAX12558 are a sub-class of data converters -> ADC -> pipelined ADC -> mixed-signal IC -> semiconductor. They are typically used after downconversion stages in radio receivers and are valued for their combination of high sampling rate, moderate resolution (14-bit), low power consumption, and integrated T/H front ends that simplify front-end filter design. Key features include dual simultaneous sampling at 80 Msps per channel, 14-bit resolution, integrated differential T/H inputs, an input bandwidth suitable for direct IF sampling up to 200 MHz, and CMOS-compatible digital outputs. The device operates from a single 3.3V analog supply and a separate 1.7V-3.6V digital supply, allowing direct connection to FPGAs, DSPs, or low-voltage ASICs without level shifting. Internal reference and clock-buffer circuits reduce external BOM. The MAX12558 uses a multi-stage pipelined architecture with on-chip digital error correction, providing 14-bit linearity at 80 Msps with low latency per stage. The pipelined topology offers a favorable trade-off between sample rate, power consumption, and resolution for communications signal chains. The integrated T/H stage handles wideband differential inputs with high common-mode rejection, which is critical for digitizing noisy IF signals. Typical applications include cellular base-station receiver digitizers, cable downstream receivers, radar IF processing, medical imaging digitizers, broadband communications test equipment, and multi-channel data-acquisition systems. The dual-channel architecture halves board area for I/Q or diversity receivers. When designing with the MAX12558, ensure the analog input network is impedance-matched for the desired IF frequency and that the separate AVDD/DVDD rails are properly decoupled to prevent digital switching noise from coupling into the analog front end. The exposed pad on the TQFN-68 package must be soldered to a low-impedance ground plane for thermal dissipation and electrical performance. This page synthesizes distributor pricing, drop-in package-compatible alternatives from the same Maxim family, and practical layout guidance not collected in any single manufacturer document.
MAX12558ETK+TD - 14-Bit 80Msps Dual IF/Baseband ADC | Maxim
The Maxim Integrated (now Analog Devices) MAX12558ETK+TD is a dual, 14-bit, 80Msps analog-to-digital converter optimized for IF and baseband digitisation, housed in a 68-pin TQFN (10x10 mm, 0.80 mm height, MO-220WNND-2) package. It operates from a 3.3V analog supply, integrates fully differential wideband track-and-hold (T/H) front ends, and drives internal pipelined quantizers that resolve 14 bits per channel at sample rates up to 80 Msps. The dual-channel architecture targets receivers that need to capture the I and Q baseband streams (or two IF slices) from a single chip, eliminating channel-matching skew between ADCs and reducing board area. An ADC (analog-to-digital converter) is the bridge between the analog RF/IF domain and the digital signal-processing domain of a receiver. Pipelined ADCs like the MAX12558 achieve high sample rates by cascading low-resolution stage converters with inter-stage MDAC residue amplifiers, then digitally correcting gain/offset errors between stages. Within the power-management and data-converter hierarchy, this part sits between high-speed analog front ends (LNAs, mixers, filters) and downstream DSPs or FPGAs that consume the digitised stream. Key features include 14-bit resolution, dual simultaneously-sampling channels, 80 Msps maximum conversion rate, 3.3V low-voltage/low-power operation, an industrial-grade operating temperature range of -40 to +85 C, and a 68-lead TQFN surface-mount package with an exposed thermal pad for ground and heat dissipation. Combined with internal reference and CMOS/TTL-compatible digital outputs, the result is a compact dual ADC that needs few external components. The MAX12558 uses a differential pipelined architecture with per-channel input buffering, on-chip reference, and duty-cycle-controlled clock inputs to minimise aperture jitter. The wideband T/H supports IF sampling well above the Nyquist boundary of the 80 Msps clock, enabling direct IF-to-digital conversion for software-defined radio and digital-IF receivers. Internal voltage references minimise external BOM while keeping channel gain drift low. Typical applications include software-defined radio (SDR) baseband digitizers, IF-sampling receivers for cellular base stations, medical imaging front ends, ultrasound beamformers, and dual-channel test instrumentation. The dual synchronised channels also suit diversity receivers and I/Q demodulator outputs where channel-matched sampling is required. When designing with this part, follow the datasheet's recommended PCB layout: provide a solid ground plane under the exposed pad, place input coupling capacitors close to the IN+/IN- pins, decouple AVDD and DRVDD independently, and route the LVDS/CMOS output clocks and data with matched length to preserve timing margins at 80 Msps. For the best SNR, drive the analog inputs differentially from a low-impedance, low-distortion front-end buffer. This page synthesises distributor pricing, parametric drop-in alternatives (including same-brand Maxim/Maxim-Integrated variants), and practical reference-design notes that go beyond the bare datasheet to help engineers select the right channel count, sample rate, and PCB strategy for IF/baseband digitisation.
MAX1270ACNG - 12-Bit 8-Ch 110kSPS SPI ADC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX1270ACNG is a 12-bit, 8-channel, serial successive-approximation analog-to-digital converter (ADC) housed in a 24-pin PDIP (N) through-hole package. It operates from a single +5 V supply, delivers 110 kSPS throughput, and accepts analog inputs up to ±17 V through fault-protected inputs. The device integrates an 8-channel analog mux, a track/hold amplifier with 5 MHz bandwidth, and a SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. What is a multirange SAR ADC? A successive-approximation register (SAR) ADC converts analog inputs to digital codes one bit per clock cycle using an internal comparator and a binary-weighted capacitor network. The "multirange" designation means the MAX1270's input range is software-configurable per channel between 0 to VREF, 0 to VREF/2, ±VREF, and ±VREF/2, allowing the same part to digitize single-ended unipolar, single-ended bipolar, and differential signals without external signal conditioning. SAR ADCs sit at the lowest latency tier of precision ADCs and are ubiquitous in industrial data-acquisition systems (DAS), instrumentation, and process control. Key features include ±17 V fault-protected analog inputs (analog signals can exceed the supply without damaging the part), four software-selectable input ranges, internal 4.096 V reference (VREF) with optional external reference override, software-selectable unipolar/bipolar conversion modes, and an internal/external serial-clock option. The 1/2LSB linearity specification provides accurate 12-bit conversion without missing codes, while the single +5 V supply simplifies analog and digital power-rail design. The MAX1270 architecture combines an on-chip input protection network, an 8-to-1 analog multiplexer, a 5 MHz track/hold, and a charge-redistribution SAR core with a serial output register. Internal scaling for the bipolar ranges is performed with a matched resistor network referenced to the internal 4.096 V reference, eliminating external precision resistors. The serial interface operates from SCLK up to the throughput limit and provides three-wire compatibility with common microcontroller and DSP serial peripherals. Typical applications include industrial process control and data acquisition, multi-loop programmable logic controllers (PLCs), battery-powered instrumentation, signal conditioning for sensors and transducers, multichannel data loggers, and embedded industrial control. The wide ±17 V fault-tolerant input range makes it especially useful when signals come from external transducers that may be mis-wired or transient-overloaded. When designing with the MAX1270, observe the supply decoupling recommendations in the Typical Operating Circuit: a 0.1 µF ceramic bypass capacitor close to VDD, a bulk tantalum or ceramic on AVDD, and a low-impedance ground return. Ensure SCLK noise does not couple into the analog input path through ground inductance. Bipolar input signals must observe the 17 V fault tolerance limit, not the absolute maximum, to avoid damage to the input protection network over time. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, helping procurement and design engineers evaluate the MAX1270ACNG against its MAX1270 family variants and modern 24-pin PDIP pin-compatible replacements.
MAX1270AENG - 12-Bit 8-Ch 110ksps SPI/QSPI ADC, +5V, DIP-24 | Maxim
The Maxim Integrated (Analog Devices) MAX1270AENG is a multirange, +5V, 8-channel, serial 12-bit successive-approximation ADC (SAR) with up to 110 ksps throughput and a fault-protected analog input multiplexer, offered in a 24-pin PDIP (DIP-24, 0.300 inch) through-hole package. What is a SAR ADC? A successive-approximation register analog-to-digital converter is a precision data-conversion architecture that performs one bit per clock cycle using an internal DAC and comparator to converge on the analog input voltage. SAR ADCs sit in the hierarchy Data Acquisition System (DAS) > ADC > data converter > mixed-signal IC, and are favored where low-latency, deterministic conversions and small footprint matter more than ultra-high sampling rates. The MAX1270 also integrates an 8-channel input MUX, track/hold, reference, and serial host interface into a single IC, eliminating external signal-conditioning glue for low-channel-count systems. Key features include 12-bit resolution with 0.5 LSB linearity, software-selectable unipolar input ranges of 0 to VREF, 0 to VREF/2, bipolar ±VREF/2 and ±VREF (with VREF = 4.096 V internal or external), an internal 4.096 V reference (MAX1270A variant), ±17 V fault-protected analog inputs that survive transients beyond the supply rails, and a 2.5 MHz bandwidth track/hold. Throughput of 110 ksps at a 5 MHz SPI clock is paired with a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface and an internal or external serial clock source. Architecture-wise the device combines an 8-to-1 input multiplexer, a fully differential capacitive-DAC-based SAR core, on-chip reference, and SPI logic in a single CMOS die. Power dissipation is held low at typically 6 mA (operating) and 10 µA (shutdown), simplifying thermal management even at 110 ksps continuous conversion. Hardware averaging and an external acquisition input simplify synchronization to system interrupts or timer events. Typical applications include industrial process-control front-ends, multi-channel data loggers, battery-pack monitoring, programmable logic controller (PLC) analog input modules, and embedded sensor conditioning for instrumentation. Designers choose the MAX1270AENG for fault-tolerant analog inputs where field wiring may carry transients. A practical design trade-off is selecting the correct input range for signal headroom versus resolution: ±VREF/2 maximizes dynamic range for bipolar sensors, while 0 to VREF/2 doubles LSB resolution for low-level unipolar signals such as thermocouples or strain gauges. This page synthesizes authorized distributor stock, drop-in DIP-24 alternatives, and application design guidance for the MAX1270AENG - compiling practical knowledge across datasheet, lifecycle and footprint domains that a single distributor page typically does not cover.
MAX1270BENG - 12-Bit, 8-Ch, +5V Multirange Serial ADC | Maxim
The Analog Devices (formerly Maxim Integrated Products) MAX1270BENG is a multirange, +5V, 8-channel, serial 12-bit successive-approximation analog-to-digital converter (ADC) housed in a 24-pin PDIP (N) package. It integrates an 8-channel analog multiplexer with ±17V fault-protected inputs, a 5MHz bandwidth track/hold, software-selectable internal/external clock, 110 ksps throughput, and an internal 4.096V reference (with external reference support). The SPI/QSPI/MICROWIRE-compatible serial interface connects directly to host microcontrollers without external glue logic, simplifying layout in data-acquisition front ends. A successive-approximation register (SAR) ADC is a type of data converter that performs a binary search against the analog input using an internal DAC and comparator, producing one code per N conversion cycles. SAR ADCs offer deterministic throughput, low latency (no pipeline delay), and excellent DC accuracy. Within the broader converter hierarchy, the MAX1270BENG sits as a 12-bit precision SAR ADC \u2192 general-purpose data-acquisition ADC \u2192 mixed-signal IC \u2192 semiconductor. It is engineered for embedded systems requiring simultaneous multi-channel, high-impedance signal digitization. Key features include bipolar input ranges (0\u201310V, 0\u20135V, \u00b15V, \u00b110V) software-configurable per channel, ±17V over-voltage protection without external clamping, internal 4.096V reference with external-reference option, single +5V supply operation, low +5V supply current of typically 1mA in operating mode, and a hardware-/software-shutdown mode that drops current below 10\u03bcA. The internal MUX-and-track/hold front end supports true-differential signal acquisition across the eight channels while keeping channel-to-channel crosstalk low. The MAX1270BENG operates from a single +5V supply and accepts analog inputs that span above the power-supply rail, enabling direct connection to industrial sensors and process signals. The bipolar +5V/-5V bipolar analog inputs allow interfacing with legacy \u00b110V industrial transducers, PLC analog modules, and instrumentation amplifiers. An on-chip 4.096V reference (50 ppm/\u00b0C typical drift) eliminates the need for an external reference in cost-sensitive designs while still allowing an external reference for high-accuracy systems. The internal/external clock mode lets designers trade conversion determinism for software simplicity. Industry-compliant design alternatives span RoHS-compliant and lead-free variants of the same die, ensuring long-term supply continuity. Typical applications include industrial process control and PLC analog input modules, multichannel data-acquisition systems, data loggers, embedded sensor front ends, instrumentation and test equipment, and medical/patient-monitoring equipment. The ±17V fault protection is particularly valuable in harsh industrial environments where transients and miswiring are common, since it lets designers omit external protection diodes and TVS clamps on every analog input line. When designing with the MAX1270BENG, place the +5V supply decoupling capacitors (0.1\u03bcF ceramic in parallel with 10\u03bcF tantalum/ceramic) within 5 mm of the AVDD and AGND pins. Keep analog and digital ground returns separated and join them in one star-point near the ADC. For best noise performance, the analog inputs should be driven by low-impedance buffers (op-amp output impedance < 100\u03a9 at the signal bandwidth) since the internal MUX and track/hold present a switched-capacitor load that draws transient current at each conversion. Allow at least 1\u03bcs settling time after MUX channel changes before initiating a conversion to avoid channel-to-channel crosstalk. This page synthesizes distributor pricing, parametric drop-in alternatives (MAX1270AENG, MAX1270BCNG, MAX1270BCAI), and practical design notes that are not found in the manufacturer datasheet alone \u2014 useful for engineers evaluating the MAX1270BENG for new designs and for those maintaining existing MAX1270-based hardware.
MAX1271AEAI - 12-Bit 8-Ch 110ksps Multirange Serial ADC | Maxim
The Maxim Integrated MAX1271AEAI is a multirange, +5V, 8-channel, serial-interface 12-bit ADC (analog-to-digital converter / data acquisition system) housed in a 28-pin SSOP package. It delivers up to 110 ksps sample rate through a successive-approximation (SAR) architecture, accepts analog inputs that can span above the power supply rail thanks to its +/-17V fault-protected inputs, and provides software-configurable input ranges of 0 to +5V, 0 to +10V, +/-5V and +/-10V for true bipolar or unipolar operation from a single +5V supply. What is a multirange ADC? A multirange successive-approximation analog-to-digital converter (SAR ADC) is a data-acquisition IC that combines an input analog multiplexer, programmable-gain input scaler, sample-and-hold, and a serial interface to convert multiple analog signals into digital codes with selectable full-scale input ranges. Multirange ADCs belong to the broader hierarchy of data converters -> ADCs -> successive-approximation ADCs -> integrated data-acquisition systems. By supporting both bipolar and unipolar full-scale ranges and operating from a single +5V supply, the MAX1271AEAI eliminates the need for external negative rails or input signal-conditioning amps in industrial process-control designs. Key features include eight single-ended or four pseudo-differential analog input channels, software-programmable input ranges and channel selection through the SPI/QSPI/MICROWIRE-compatible serial interface, an internal +4.096V reference (with REFADJ for external reference use), and a hardware-/software-controlled power-down mode that drops supply current to under 10 uA between conversions. The +5V-only single-supply operation and +/-17V input fault protection let the device survive miswired sensor lines in industrial environments without external protection components. Architecturally, the MAX1271AEAI uses a charge-redistribution SAR core with an input track-and-hold and a laser-trimmed resistor-string DAC. The serial interface is fully SPI-/QSPI-/MICROWIRE-compatible with the standard four-wire SCLK, DIN, DOUT and CS arrangement, simplifying connection to common microcontrollers and DSPs. The combination of input protection, on-chip reference, and flexible range switching makes the device a compact analog front-end for PLC analog input modules and similar multi-channel signal-acquisition boards. Typical applications include industrial process-control analog input modules, PLC analog front ends, multichannel data-acquisition boards, battery-cell voltage monitors, and sensor-signal digitization in factory automation. The 110 ksps throughput is sufficient to scan all eight channels at sample rates well above typical industrial control loops, while the +/-10V bipolar range directly accepts 4-20 mA-loop-derived process signals after sense-resistor conversion. When designing with the MAX1271AEAI, place the 0.1 uF VDD bypass capacitor as close as possible to the supply pin and add a 10 uF bulk capacitor on AVCC to limit ADC reference-amplifier settling distortion during simultaneous source-impedance scans. Keep analog and digital grounds separated and joined only at the AGND pin, and route SCLK with controlled impedance to limit digital-edge coupling into sensitive analog traces. The on-chip +4.096V reference is convenient but cannot drive low-impedance loads - buffer it externally if more than one part references it. This page synthesizes distributor pricing, parametric drop-in alternatives and practical PCB-layout notes not found in the manufacturer datasheet - giving design engineers a single reference for part selection, replacement sourcing, and first-pass circuit implementation.
MAX1271AENG - 12-Bit 8-Ch 110ksps Multirange ADC | Maxim
The Maxim Integrated MAX1271AENG is a multirange, +5V, 8-channel, 12-bit analog-to-digital converter (ADC) with serial interface, housed in a 24-pin PDIP (DIP-24, 0.300 inch) through-hole package. It operates from a single +5V supply, supports a sampling rate of up to 110 ksps, and offers four software-selectable input ranges (0 to VREF, 0 to VREF/2, 0 to 2xVREF, 0 to 4xVREF) that allow direct digitization of signals above and below the supply rail without external signal conditioning. The MAX1271AENG uses a successive-approximation register (SAR) architecture with an internal 4.096V reference and provides 0.5 LSB integral nonlinearity (INL). An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog input voltage and converts it into a discrete digital code for use by a microcontroller or DSP. The MAX1271AENG belongs to the SAR ADC product family, which is favored in multiplexed multi-channel data acquisition because SAR converters offer deterministic latency, easy channel-to-channel synchronization, and require no settling-time programming between conversions. Within the broader taxonomy, a SAR ADC sits under precision ADC, which sits under data converter (ADC/DAC), which is a subcategory of mixed-signal ICs and ultimately of integrated circuits. Key features of the MAX1271AENG include a three-wire SPI/QSPI/MICROWIRE-compatible serial interface, hardware- or software-controlled shutdown that drops supply current below 10 uA between conversions, an internal 4.096V reference (or optional external reference up to +4.096V for ratio-metric conversions), and four bipolar analog input ranges. The 24-pin PDIP package simplifies prototyping on through-hole breadboards and is well suited to industrial process-control, instrumentation, and front-end signal conditioning. The internal architecture combines an 8-channel analog multiplexer, a track-and-hold amplifier with a 200 ns acquisition time, the SAR core, and the digital serial interface. The reference buffer can drive the external reference pin as a low-impedance source, improving settling when switching between multiplexed channels with widely differing amplitudes. Typical applications include multi-channel sensor data acquisition systems (RTDs, thermocouples, and 4-20 mA loop transmitters), industrial process controls, weigh scales, panel meters, and general-purpose 12-bit instrumentation. The wide input ranges make the part particularly attractive in systems where bipolar signals or signals up to +/-15V must be digitized without active front-end signal conditioning. When designing with the MAX1271AENG, provide a 0.1 uF ceramic bypass capacitor within 5 mm of VDD and a low-ESR bulk capacitor on the analog supply to preserve the converter's 12-bit noise performance across the 0-110 ksps throughput range. This page synthesizes distributor pricing, drop-in alternative parts, and practical design notes for the MAX1271AENG that are not found in the manufacturer datasheet alone.
MAX1274AETC+ - 1.8Msps 12-Bit SAR ADC | Analog Devices
The Analog Devices MAX1274AETC+ is a low-power, high-speed, serial-output 12-bit successive-approximation analog-to-digital converter (SAR ADC) operating up to 1.8Msps, housed in a 12-pin TQFN (4 x 4 mm) package with 0.80 mm height. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm combined with an internal sample-and-hold capacitor to convert an analog input voltage into a 12-bit digital word on each conversion clock. SAR ADCs sit within the broader data-converter hierarchy (SAR -> ADC -> data converter -> signal chain IC -> semiconductor) and are favored for applications that require low latency, deterministic throughput, and accurate DC measurements because every conversion result is available one clock cycle after the input is sampled. The MAX1274AETC+ extends that architecture with true-differential inputs, simplifying common-mode noise rejection in noisy industrial or process-control environments. Key features include 1.8Msps sampling rate, true-differential analog inputs, single-supply operation, an external reference interface, and a serial SPI-compatible data interface. The device is specified across a 0C to +70C commercial temperature range and is offered in the compact TQFN-12 (4 x 4 mm) surface-mount package with an exposed thermal pad. Compared to the pin-compatible MAX1275, the MAX1274 offers the same 12-bit 1.8Msps throughput in the same TQFN-12 footprint. Internally, the MAX1274AETC+ uses a charge-redistribution DAC array clocked by an external conversion clock, providing excellent linearity (DNL/INL typically within 1 LSB) and low aperture uncertainty. The true-differential input stage accepts bipolar or single-ended signals (software-configurable) and supports input common-mode voltages up to the supply rails, simplifying front-end signal conditioning in measurement instruments and industrial control loops. Typical applications include data-acquisition systems, process-control front ends, motor-control position feedback, optical-module monitoring (SFP/QSFP), portable instrumentation, and multi-channel I/O modules where 12-bit resolution and >1Msps throughput are required at low power. Design with a 0.1uF ceramic bypass capacitor placed within 5 mm of the AVDD pin and a low-impedance analog ground plane; keep digital traces away from the analog input traces. Because the SAR conversion uses an internal comparator, clock jitter and reference decoupling directly influence AC performance at high sampling rates. This page synthesizes distributor pricing for MAX1274AETC+, drop-in same-package alternatives across the MAX1274/MAX1275 family, and practical design notes not found in the manufacturer datasheet.
MAX1274BETC+ - 1.8Msps 12-Bit Differential SAR ADC | Maxim
The Maxim Integrated MAX1274BETC+ (now under Analog Devices) is a 1.8Msps, single-supply, low-power, true-differential, 12-bit successive-approximation analog-to-digital converter (SAR ADC) housed in a 12-pin TQFN (4x4 mm) package with an exposed pad. It accepts a single true-differential analog input and delivers conversion results through an SPI-compatible serial interface, with a single ADC channel and an external voltage reference. A SAR ADC is a successive-approximation-register analog-to-digital converter: it uses a binary search across an internal capacitive DAC to digitize the input in N clock cycles, where N equals the resolution in bits. SAR ADCs occupy the middle ground between flash converters (very fast but power-hungry) and delta-sigma ADCs (very high resolution but slow). The MAX1274BETC+ fits the high-speed, moderate-resolution node of that taxonomy: SAR ADC -> data converter -> data acquisition IC -> mixed-signal semiconductor. Key features include a 1.8Msps maximum sampling rate, true-differential analog inputs for superior common-mode noise rejection, single +5V analog supply operation, an external reference input, and low power consumption suitable for portable and industrial applications. The TQFN-12 4x4 mm package exposes the thermal pad on the underside for low thermal resistance, and SPI/QSPI/MICROWIRE compatibility simplifies connection to most microcontrollers and DSPs. Architecturally, the device uses a BiCMOS process combining bipolar precision with CMOS logic, a track-and-hold front-end, a successive-approximation register with a binary-weighted capacitor array, and a serial output engine. The differential topology rejects common-mode noise from motors, switching regulators, and long cable harnesses - a meaningful advantage over single-ended ADCs in industrial environments. Typical applications include data acquisition front-ends, industrial process control, motor control current sensing, portable instrumentation, and medical monitoring where true-differential inputs simplify sensor bridge readout. The exposed thermal pad also makes the part suitable for higher-temperature industrial environments. When designing with this ADC, keep the analog input bandwidth below the Nyquist limit (Fs/2 = 900kHz) and place the external reference decoupling capacitor close to the REF pin. The exposed pad must be soldered to the board ground plane for thermal and electrical performance; failing to solder the pad increases thermal resistance and can degrade ADC accuracy. This page synthesizes distributor pricing, drop-in and package-compatible alternatives, and practical design notes that the bare datasheet does not present side-by-side.
MAX1274BETC+T - 12-Bit 1.8Msps Diff ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1274BETC+T is a 1.8Msps, single-supply, low-power, true-differential, 12-bit SAR ADC in a 12-pin TQFN (4x4) package. It accepts input voltages up to 5.25V on a single 5V supply and features a high-speed serial interface, true-differential analog inputs, and an integrated 4.096V internal reference option. The TQFN-12 package measures 4mm x 4mm with 0.8mm height and is qualified to industrial temperature range -40C to +85C. An SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that performs conversion by binary-searching the input voltage against an internal DAC using a comparator, one bit per step, completing in N clock cycles per conversion. SAR ADCs are valued for low latency, deterministic conversion time, and excellent DC accuracy - making them the standard choice for multiplexed data-acquisition systems, industrial process control loops, and precision sensor readouts. The MAX1274 belongs to the data converter IC family, which sits within the broader signal-chain and mixed-signal semiconductor hierarchy. Key specifications include 1.8Msps maximum sampling rate, true-differential input architecture for improved common-mode noise rejection, 12-bit resolution (DNL of each measurement input), SPI/QSPI/MICROWIRE-compatible serial output, and low power consumption of typically 15mW at full speed. The device operates from a single +5V analog supply with a separate +3V to +5V digital I/O supply for easy microcontroller interfacing. The MAX1274/MAX1275 family shares a common BiCMOS process technology, achieving low power dissipation without sacrificing speed. Internal options include software-configurable input ranges (unipolar) and an internal or external reference, simplifying board layout. The MAX1274 (MAX1274B suffix) features a -B internal reference voltage configuration distinguishing it from the MAX1274A variant. Typical applications include portable instrumentation, multi-channel data-acquisition systems, process control loops, battery-powered medical devices, and industrial sensor readouts. True-differential inputs make it well-suited for bridge sensors and thermocouple front-ends. Single-supply operation simplifies power tree design in compact embedded systems. When designing, place the input RC filter components within 5mm of the analog input pins and keep digital traces away from analog traces. The internal reference output requires an external bypass capacitor of 0.1uF plus 10uF for noise filtering - omitting this capacitor degrades SNR performance. This page synthesizes distributor pricing, drop-in alternatives from web cross-reference data, and practical design guidance beyond the manufacturer datasheet to support rapid design-in and sourcing decisions.
MAX1275ACTC+T - 12-Bit 1.8Msps SAR ADC | Maxim Integrated
The Maxim Integrated MAX1275ACTC+T is a 12-bit, 1.8 Msps, single-supply, low-power, true-differential, successive-approximation analog-to-digital converter (ADC) housed in a 12-pin TQFN (4x4 mm) package. It accepts a 2.7V to 3.6V analog supply (AVDD) and a separate digital supply, supports true-differential analog inputs up to ±VREF (where VREF can be driven internally or externally), and streams conversion results through a high-speed SPI/QSPI/MICROWIRE-compatible serial interface. Key specifications include a 1.8 Msps sampling rate, ±1 LSB INL (DNL) linearity, an internal 2.5V reference (with the option of an external reference), true-differential input bandwidth sufficient for AC measurements, and low power dissipation suitable for battery-powered and portable designs. The part supports both unipolar (0 to VREF) and bipolar (±VREF) input ranges. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous-time analog signal and converts each sample into a discrete digital code. SAR (successive-approximation register) ADCs use a binary-search algorithm with an internal DAC, offering an excellent trade-off between speed, accuracy, and power consumption. The MAX1275 sits in the data-converter hierarchy: ADC -> SAR ADC -> 12-bit ADC -> low-power single-supply ADC. The 1.8 Msps throughput and 12-bit resolution place it in the mainstream precision-sensing tier above 10-bit general-purpose ADCs but below 14-/16-bit precision converters, making it well-suited for industrial control, motor control, and base-station applications. Architecturally, the MAX1275 uses a charge-redistribution DAC together with a low-noise comparator and on-chip track/hold, achieving true-differential sampling that rejects common-mode noise - a critical feature in motor-drive and process-control environments where ground bounce and switching transients dominate. The internal 2.5V reference removes the need for an external precision reference in many designs, reducing BOM cost and PCB area, while still allowing external reference drive for tighter gain calibration. Typical applications include industrial process control loops (4-20 mA sensor digitisation), motor control current/voltage sensing, base-station RF power-detector digitisation, data-acquisition front-ends, and handheld instrumentation. Its single 3V supply and serial interface also make it attractive for portable test gear and medical monitoring devices. When designing with the MAX1275ACTC+T, ensure the analog and digital grounds are joined at a single point near the exposed pad, place the 0.1 µF + 10 µF decoupling pair as close as possible to AVDD/DVDD, and route the SPI signals with characteristic impedance control to avoid coupling digital noise back into the analog front-end. This page synthesises distributor pricing, drop-in alternatives within the MAX1274/MAX1275 family and competitive cross-brand 12-bit 1.8 Msps ADCs, and practical design notes drawn from the Maxim datasheet - information not consolidated on a typical distributor product page.
MAX1276CTC+ - 12-Bit 1.8Msps SAR ADC | Analog Devices
The Analog Devices MAX1276CTC+ is a 12-bit, 1.8 Msps, low-power, true-differential, serial-output successive-approximation analog-to-digital converter (SAR ADC) housed in a 12-pin TQFN (4x4) package. It features a single +3V analog supply, an internal 2.5V reference, and a single-ended or true-differential analog input channel, with throughput up to 1.8 million samples per second at the full Nyquist bandwidth. A SAR ADC is a type of analog-to-digital converter that uses a binary search (successive approximation) through a precision DAC and comparator to digitize each input sample in N clock cycles for N bits of resolution. SAR converters are valued for deterministic latency, low latency between sample and conversion result, no pipeline delay, and excellent DC accuracy with no missing codes - they are widely used in precision industrial, instrumentation, and motor-control data-acquisition front ends where deterministic conversion timing simplifies synchronization with control loops. Key features include a true-differential analog input that rejects common-mode noise, an internal 2.5V reference (no external reference required for many applications), a low power consumption of around 18 mW at 1.8 Msps, and a high-speed SPI/QSPI/MICROWIRE-compatible serial interface. The 12-pin TQFN (4x4 mm) package is small and supports reflow soldering on standard SMT lines, while the wide analog supply range (2.7V to 3.6V) makes the part easy to integrate into 3.3V industrial and data-acquisition designs. The architecture uses a charge-redistribution DAC and an internal low-drift reference, achieving 12-bit resolution with no missing codes and an SINAD typically around 71 dB at fIN close to Nyquist. The serial interface is straightforward and supports daisy-chaining multiple MAX1276/MAX1278 devices on a single SPI bus when more than one channel is needed in a system. Typical applications include process control and industrial data acquisition, motor control current/voltage sensing, weigh scales, portable instrumentation, and front-end digitizers for 4-20 mA loop-powered sensors. The combination of true-differential input and integrated reference simplifies board layout and BOM compared to discrete SAR solutions. For battery-powered designs, the part's low shutdown current extends operating time when the ADC is sampled intermittently. When designing with this ADC, keep analog and digital grounds short and tied at a single point, place the 0.1 uF bypass capacitor as close as possible to the AVDD pin, and route the serial-clock line with a series resistor or controlled impedance to limit ringing at 1.8 Msps. Using the internal reference removes the need for an external reference but sacrifices full-scale range flexibility; for applications above 2.5V FS, an external reference can be driven into REF. This page synthesizes distributor pricing, drop-in alternatives from the same ADI pin-compatible family and from cross-brand sources, and practical design notes not found in the manufacturer datasheet, giving engineers a faster path from datasheet to BOM.
MAX1276CTC+T - 12-Bit 1.8Msps Differential ADC | Maxim Integrated
The Maxim Integrated MAX1276CTC+T is a 12-bit, 1.8 Msps, single-supply, low-power, true-differential analog-to-digital converter (ADC) with an internal reference, packaged in a 12-pin TQFN (4x4 mm). It operates from a single +2.7V to +3.6V analog supply, draws only 4.5 mW at 1.5 Msps, and provides a true-differential analog input paired with an internal 2.5V bandgap reference. What is a SAR ADC? A successive-approximation-register (SAR) analog-to-digital converter is a class of Nyquist-rate ADC that converts an analog input to a digital code by stepping through bit decisions from MSB to LSB using a binary search through an internal capacitive DAC. SAR ADCs sit in the hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. They are favored over delta-sigma ADCs for multi-channel multiplexed systems and over pipelined ADCs when true-differential input ranges, low latency, and deterministic behavior are needed. Key features of the MAX1276CTC+T include a true-differential input stage supporting 0 to VREF (unipolar) or ±VREF (bipolar) signal swings, an internal 2.5V low-drift reference, an external reference option for ratio-metric conversions, and a high-speed SPI/QSPI/MICROWIRE-compatible serial interface. The 12-bit resolution with no missing codes and ±1 LSB INL delivers clean, monotonic conversion results. The integrated track-and-hold accepts input bandwidths well above Nyquist, preserving signal integrity for AC-coupled measurement front-ends. The device uses a charge-redistribution SAR architecture with an automatic power-down mode between conversions, dropping supply current to under 1 µA when idle. This makes it well-suited for battery-powered or duty-cycled instrumentation where the part only wakes during a sample window. The serial output delivers 12-bit results MSB-first with a maximum 20 MHz SCLK rate, allowing direct connection to microcontrollers, DSPs, and FPGAs without glue logic. Typical applications include data-acquisition systems, pen-digitizers and touch-screen controllers, portable instrumentation, battery-powered medical devices, and process-control I/O modules. The +3V single-supply operation simplifies power-tree design in mixed 3.3V/1.8V systems where a clean analog rail is essential. The internal reference eliminates the external reference IC on most boards, reducing BOM cost and PCB area. When designing with the MAX1276CTC+T, place a 0.1 µF ceramic bypass capacitor within 5 mm of the AVDD pin and a 10 µF bulk tantalum or ceramic cap on the supply rail. Keep the analog input traces short and guard them with a ground pour to minimize coupled noise; the true-differential input stage rejects common-mode disturbance, but PCB asymmetry degrades CMRR. The exposed pad (EP) must be soldered to a clean analog ground plane for thermal and electrical performance. This page synthesizes distributor pricing for the tape-and-reel MAX1276CTC+T variant, pin-compatible same-family drop-in alternatives (MAX1276ETC+T, MAX1276CTC+), and practical layout notes not collected in the manufacturer datasheet alone.
MAX1278CTC+T - 12-Bit 1.8Msps SAR ADC | Maxim Integrated
The Maxim Integrated MAX1278CTC+T is a 12-bit, 1.8Msps, single-supply, low-power, true-differential analog-to-digital converter (ADC) with an internal reference, offered in a 12-pin TQFN (4x4 mm) package. It features a successive-approximation (SAR) architecture with a serial output interface, a single +3V analog supply, and 1 true-differential analog input channel designed for high-noise-immunity signal acquisition. A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm with a high-speed comparator and an internal DAC to resolve each conversion in N clock cycles, where N equals the resolution in bits. SAR ADCs combine compact die area, deterministic latency (one conversion per N cycles), and excellent DC accuracy with moderate sampling rates, making them the workhorse of precision data-acquisition front-ends. The MAX1278CTC+T sits inside the broader power-management and data-conversion signal chain as the link between analog transducers (sensors, current shunts, bridge outputs) and an MCU, FPGA, or DSP that performs post-processing. Key features include an internal precision reference, true-differential inputs for common-mode noise rejection, low power consumption suitable for battery-powered applications, a serial interface compatible with SPI/QSPI/MICROWIRE, and a compact TQFN-12 footprint. The internal reference eliminates external reference components and the associated layout noise. The MAX1278 uses a charge-redistribution SAR core driven by an internal oscillator and an integrated input track-and-hold, achieving 12-bit resolution at up to 1.8 million samples per second. This combination of speed and accuracy suits systems that need to capture fast transient signals or multiplex multi-channel sensor arrays without sacrificing effective number of bits (ENOB). The true-differential input rejects common-mode noise picked up on long sensor cables, allowing direct connection to bridge sensors, current-sense amplifiers, and differential line drivers. Typical applications include industrial process control loops, portable battery-powered instrumentation, data-acquisition systems, sensor signal conditioning for strain gauges and thermocouples, and motor-control current monitoring. Designers favor it where board space and power are constrained but full 12-bit resolution must be retained per channel. When designing with the MAX1278CTC+T, place a 0.1 uF ceramic bypass capacitor within 5 mm of the AVDD pin and a 10 uF tantalum or ceramic bulk capacitor on the analog supply rail. Use a separate analog ground island and tie it to the digital ground at a single point under the exposed pad of the TQFN to keep digital switching currents away from the input signal ground reference. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not collected together in the manufacturer datasheet alone.
MAX1279AETC+ - 12-Bit 1.5Msps Differential ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1279AETC+ is a 12-bit, 1.5 Msps, single-supply, low-power, true-differential analog-to-digital converter (ADC) with internal 2.5V reference, offered in a 12-pin TQFN package. It supports a unipolar analog input range of 0 to +VREF and operates from a single +3V supply (typical 3.6V maximum), drawing only a few milliamps of supply current during full-speed conversions. What is a successive-approximation ADC? An SAR (Successive Approximation Register) ADC is a sampled-data converter that uses an internal binary-search algorithm combined with an internal DAC to digitize an analog input. SAR ADCs typically offer an excellent balance of speed (hundreds of kSps to a few Msps), resolution (10-18 bits), latency (typically one conversion cycle), and power consumption (single-digit mA), placing them in the converter hierarchy between high-speed flash ADCs and high-resolution delta-sigma ADCs. Key features of the MAX1279AETC+ include a true-differential analog input path that improves common-mode noise rejection, an internal 2.5V precision reference (eliminating an external component), a high-speed SPI/QSPI/MICROWIRE-compatible serial interface, and hardware- or software-controlled shutdown that reduces supply current to a few microamps between conversions. The MAX1277 (225 ksps) and MAX1279 (1.5 Msps) are pin-compatible family members sharing the same 12-pin TQFN footprint. Internally, the MAX1279AETC+ uses a charge-distribution DAC and a high-bandwidth track-and-hold to digitize true-differential inputs in a single conversion cycle. The true-differential input structure rejects common-mode noise from the signal source and the PCB ground, which is critical in motor-control and industrial-sensor applications where ground loops and large common-mode transients are common. Typical applications include data acquisition systems, motor control current sensing, industrial process control, weigh scales, and portable instrumentation. The combination of single-supply operation, internal reference, true-differential input, and low power dissipation makes the MAX1279AETC+ particularly attractive for battery-powered or loop-powered industrial sensor front-ends. Design consideration: place the 0.1 µF and 10 µF bypass capacitors as close as possible to the AVDD pin with a short, wide trace, and route the differential input traces symmetrically with a solid ground plane beneath them. Decouple the digital DVDD from AVDD with a ferrite bead to prevent digital switching noise from coupling into the analog front-end. This page synthesizes distributor pricing, drop-in compatible same-package alternatives from the MAX1277/MAX1279 family, and practical layout/design notes that complement (rather than duplicate) the manufacturer datasheet.
MAX1281BCUP - 12-Bit 8-Ch 400ksps SAR ADC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX1281BCUP is a 12-bit, 8-channel, successive-approximation-register (SAR) analog-to-digital converter (ADC) with internal 2.5 V reference and serial SPI/QSPI/MICROWIRE-compatible interface, housed in a 20-pin TSSOP package. It accepts 4 or 8 analog input channels through an internal MUX and combines a high-bandwidth track/hold amplifier that delivers up to 400 ksps (MAX-IN) or 300 ksps (MAX1281B grade) throughput on a single 2.7 V to 3.6 V analog supply. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog voltage signals and converts them into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. The SAR architecture uses a successive-approximation register with a precision DAC to binary-weigh input voltage against the reference in lock-step, settling for a one-stage-per-bit conversion with deterministic latency. In the broader taxonomy, the MAX1281BCUP belongs to the data-converter hierarchy: ADC -> SAR ADC -> precision ADC -> mixed-signal IC -> integrated circuit -> semiconductor. The 8-channel MUX makes it a single-chip multi-channel data acquisition front-end. Key features include: 12-bit resolution with no missing codes, 400 ksps (MAX1280) or 300 ksps (MAX1281) throughput, internal 2.5 V reference, single 2.7 V to 3.6 V analog supply operation, low 2.5 mA (typ) operating supply current, hardware- and software-configurable analog input MUX (4-channel single-ended or 8-channel pseudo-differential via AIN0-AIN7 plus dedicated COM input), SPI/QSPI/MICROWIRE-compatible serial interface, and an external clock mode option (MAX1281B external-clock variants). The TSSOP-20 surface-mount package offers small footprint with gull-wing leads. The MAX1281BCUP uses a BiCMOS process that integrates a precision switched-capacitor DAC, comparator, SAR register, control logic, and 8:1 analog MUX on the same die. Internal reference eliminates an external reference IC, reducing BOM cost in cost-sensitive consumer, debug, and process-control equipment. The high-bandwidth track/hold sustains accurate acquisition at full speed, with track/hold acquisition time dedicated to the first internal-clock cycle per conversion. Single-supply operation simplifies portable-instrument power design. The MAX1281BCUP is well suited for multi-channel data acquisition in data-acquisition cards, process-control and industrial sensor signal chains, portable instrumentation, medical instruments, battery-powered consumer audio and telecommunications systems, and embedded system front-ends with multiple analog sensors. When using the MAX1281BCUP, place 10 uF and 0.1 uF bypass capacitors close to the analog supply pin and ensure the analog and digital grounds are joined at a single point near the ADC. Allow 20 clock cycles per conversion in internal-clock mode and follow the datasheet logic sequence when reconfiguring the MUX between conversions. This page synthesizes distributor pricing, drop-in TSSOP-20 alternatives, and practical design application notes not found in the manufacturer datasheet.
MAX1282AEEE - 400ksps 12-Bit 4-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX1282AEEE is a 12-bit, 400 ksps, 4-channel successive-approximation analog-to-digital converter (ADC) with an internal 2.5V reference, serial SPI/QSPI/MICROWIRE interface, and single +5V analog supply, housed in a 16-pin TSSOP package rated for 0 °C to +70 °C commercial operation. The part integrates a true SAR core, on-chip track/hold, internal reference, and four analog input channels with software-configurable unipolar input range, achieving ±0.5 LSB integral nonlinearity (INL) and ±1 LSB differential nonlinearity (DNL). An SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm against a precision DAC to convert each input sample in a fixed number of clock cycles. Within the data-converter hierarchy, the MAX1282AEEE belongs to the medium-speed, multi-channel, low-power SAR ADC family, which sits between flash converters (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, slowest). This product category serves precision instrumentation, industrial control loops, and embedded data-acquisition systems where multiple analog signals must be digitized at moderate rates with deterministic latency. Key differentiating specifications include 400 ksps maximum sampling rate, 4 input channels with software selection, internal 2.5V reference (10 ppm/°C typ), 3.0 µA power-down current, and a -86 dB THD at 100 kHz input. The serial interface operates up to 20 MHz in SPI mode, supporting DSP- and microcontroller-friendly data framing. Single-supply +5V operation eliminates the bipolar rails that many competing 12-bit parts still require. Architecturally, the device uses a charge-redistribution SAR core with an input track/hold rated to 0.5 ns aperture delay, an on-chip 2.5V buried-zener reference buffer, and a sequencer that cycles through the four analog inputs when placed in scan mode. The wide +5V supply tolerance simplifies industrial PLC and process-control designs where supply noise is heavy and rails are shared with relays. Typical applications include multi-zone industrial process monitoring (RTD/thermocouple multiplexing), portable 4-channel data loggers, panel-meter and weigh-scale front ends, rack-mounted instrumentation, and embedded sensor-interface modules in industrial and consumer end equipment. The pin-compatible MAX1283AEEE offers a higher 300 ksps / lower 4-channel trade-off only via software register access. When designing with this part, place a 10 µF tantalum plus 0.1 µF ceramic bypass directly at pin 16 (VDD) and at pin 1 (REF) to preserve reference stability. Adequate analog/digital ground plane separation is critical because the SAR core draws transient currents of several mA on each conversion edge, which couple back into the reference if sharing is poor. This page synthesizes verified distributor pricing, drop-in pin-compatible alternatives, and design notes that complement the manufacturer datasheet and the typical-application schematic.
MAX1283AEEE - 12-Bit 300ksps 4-Ch Serial ADC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX1283AEEE is a 12-bit, 300ksps/400ksps, low-power, single-supply, 4-channel analog-to-digital converter (ADC) with an internal 2.5V reference, packaged in a 16-pin QSOP (TSSOP-16) surface-mount package. It operates from a +2.7V to +3.6V supply, integrates a 4-channel analog input multiplexer, a high-bandwidth track/hold (T/H), and a serial (SPI/QSPI/MICROWIRE-compatible) digital interface, and uses a successive-approximation architecture. An ADC (analog-to-digital converter) is an integrated-circuit component that translates a real-world analog voltage or current into a discrete digital code. The MAX1283 family belongs to the successive-approximation register (SAR) ADC category, which is a sub-type of data-converter ICs in the broader mixed-signal semiconductor hierarchy: ADC -> data converter -> data-acquisition IC -> semiconductor. SAR ADCs are valued for their deterministic latency, low power consumption, and ability to operate from low-voltage single supplies, making them the default choice for precision multi-channel embedded sensing applications. Key features of the MAX1283AEEE include 300ksps guaranteed throughput (400ksps for the MAX1283 internal characterization), an internal 2.5V reference, software-configurable unipolar/bipolar and single-ended/pseudo-differential inputs, a hardware SHUTDOWN pin that reduces supply current to under 10uA, an external-reference option, and a serial interface compatible with SPI, QSPI, and MICROWIRE. The pseudo-differential input mode allows the negative input to track small common-mode swings, improving effective common-mode rejection in industrial environments. The MAX1283AEEE uses a charge-distribution DAC inside the SAR core and an input track/hold amplifier with bandwidth sufficient for full-scale step settling within one acquisition cycle. Its low THD and DNL specifications make it suitable for digitizing signals up to the audio band without missing codes. Use the MAX1283AEEE in portable data loggers, 4-20mA loop-powered sensor front-ends, hand-held oscilloscope probes, pen-tablet digitizers, and patient-monitoring front-ends where 4 single-ended or 2 pseudo-differential channels, 12-bit accuracy, and <2.5mA active supply current are required. When designing with this device, place a 0.1uF ceramic bypass capacitor within 5mm of the AVDD pin and tie AGND and DGND to a single star point to preserve the rated INL and DNL. Do not operate the analog inputs above AVDD or below AGND, even when the channel is powered down. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes that are not collated in the manufacturer datasheet, providing a faster engineering-decision reference.