ADC/DAC
Productos (2518)
MAX1209ETL+T - 12-Bit 80Msps 3.3V IF-Sampling ADC | Maxim Integrated
The Maxim Integrated MAX1209ETL+T is a 12-bit, 80Msps, 3.3V IF-sampling analog-to-digital converter (ADC) housed in a 40-pin TQFN exposed-pad package with 6 x 6 mm body dimensions and 0.8 mm height, conforming to outline MO-220WJJD-2. It integrates a fully differential wideband track-and-hold input amplifier that drives a low-noise internal quantizer, and supports both fully differential and single-ended signal input configurations. An ADC, or analog-to-digital converter, is a semiconductor device that samples continuous-time analog signals and converts them into discrete digital codes for downstream processing. IF-sampling ADCs are a specialized category designed to digitize intermediate-frequency (IF) signals directly in communication receivers, bypassing traditional baseband downconversion stages. The MAX1209ETL+T sits within the broader hierarchy of data converters -> ADC -> flash/pipelined ADC -> IF-sampling ADC -> power management and signal-chain ICs. Key features include an 80 mega-sample-per-second (Msps) maximum sampling rate, 12-bit resolution, a 3.3V analog supply, and operation over the industrial -40 to +85 C temperature range. The internal pipelined/flash quantizer architecture delivers wide input bandwidth suitable for IF frequencies, while the differential T/H amplifier minimizes distortion on demanding input waveforms. Architecturally, the MAX1209ETL+T uses a multi-stage pipelined core fed by a high-bandwidth differential track-and-hold front end, allowing it to capture high-IF signals at the second or third Nyquist zone with low aperture jitter. Parallel CMOS-compatible digital outputs simplify interface to FPGAs or DSPs. Typical applications include cellular base-station IF digitizers, digital predistortion feedback paths in wireless infrastructure, radar and electronic-countermeasure receivers, medical imaging front ends, and broadband instrumentation. Industrial screening and a wide operating temperature window also suit it for test-and-measurement systems. When designing with this part, place the exposed pad on a contiguous ground pour with multiple thermal vias to minimize die-to-ambient thermal resistance. Use an external low-noise LDO on the 3.3V AVDD rail and decouple it with 10 uF and 0.1 uF ceramics placed as close as possible to the supply pins. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX1209ETL+TG3U - 12-Bit 80Msps 3.3V IF-Sampling ADC | Maxim
The Maxim MAX1209ETL+TG3U is a 12-bit, 80Msps, 3.3V IF-sampling analog-to-digital converter (ADC) housed in a 40-pin QFN (HVQCCN) package. It supports fully differential or single-ended signal input configuration, integrates an on-chip track-and-hold amplifier and a low-drift internal voltage reference, and is specified for industrial-grade temperature operation. The TG3U suffix denotes the Tape & Reel packaging variant shipped in 2.5kG3U reel orientation. An IF-sampling ADC (Intermediate Frequency sampling analog-to-digital converter) is a type of data converter that digitizes analog waveforms whose center frequency lies in the tens to hundreds of MHz range. Unlike baseband ADCs that expect near-DC inputs, IF-sampling converters accept modulated signals directly and relax the filtering burden on upstream mixers. The MAX1209 belongs to the broader category of flash and pipelined ADCs, which form part of the data-converter IC family within mixed-signal semiconductor products. Key specifications include 12-bit resolution, 80 Msps maximum sampling rate, single 3.3V analog supply, and an integrated reference. The converter uses a flash-architecture digitizer with on-chip T/H, providing low-latency conversion suitable for IF signal chains. Differential inputs reject common-mode noise from upstream mixers and amplifiers, simplifying board layout in radio receiver designs. Typical applications include digital predistillation feedback paths, cable-modem upstream and downstream digitizers, IF-stage digitizers in cellular base-station receivers, and general-purpose 12-bit data-acquisition systems operating in the 0-200 MHz IF band. The wide input bandwidth and 3.3V single-supply operation simplify power-tree design for portable and industrial equipment. When designing with this device, keep analog and digital ground returns short and routed separately back to the JFET regulator that supplies AVDD. Use a low-ESR 0.1 uF ceramic bypass capacitor directly on each supply pin, plus a bulk 10 uF tantalum or ceramic capacitor, and route the analog input traces as a 100 ohm differential pair on the top layer over a continuous ground plane. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement and engineering teams a single source for parametric, sourcing, and PCB-layout guidance for the MAX1209ETL+TG3U.
MAX120CWG - 500ksps 12-Bit ADC w/ T/H & Reference | Maxim Integrated
The Maxim Integrated MAX120CWG (also marketed as MAX120CWG+) is a 500 ksps, 12-bit successive-approximation analog-to-digital converter (SAR ADC) with on-chip track/hold (T/H) amplifier and a low-drift buried-zhid voltage reference, housed in a 24-pin wide SOIC (W) package. It supports bipolar input ranges of ±5 V or ±3 V when using ±5 V analog supplies, plus a unipolar 0 to +5 V mode from a single +5 V supply, all selected by strap pin logic. The integrated 2.5 V reference has a low 40 ppm/°C typical drift and supplies the resistor ladder directly, so an external reference is not required. A successive-approximation ADC is a sampling data converter that resolves a single analog input to N bits in N clock cycles using a binary-weighted capacitor DAC and comparator. Each conversion begins with the internal track/hold acquiring the input, then the SAR logic tests bits from MSB to LSB while the comparator output drives the successive-approximation register. SAR ADCs offer deterministic latency and excellent DC accuracy, making them a workhorse for multiplexed data-acquisition front ends, instrumentation loops, and DSP-based control systems. Key features of the MAX120CWG include 12-bit resolution with no missing codes over the industrial 0°C-±70°C range, ±1/2 LSB integral nonlinearity (INL) in grade-A parts, ±25 ppm/°C gain drift, and a track/hold with 100 ps aperture delay. The device uses a BiCMOS process that combines bipolar input/track-hold linearity with CMOS digital logic, and includes a high-bandwidth input buffer option that supports input impedances above 1 kΩ. Throughput is 500,000 conversions per second with a 73 dB SINAD and 70 dB THD, and power consumption is 90 mW typical at full speed, dropping to 5 µW in shutdown. Typical applications for the MAX120CWG include industrial process-control data-acquisition boards, pen-tracer digitizers, precision instrumentation front ends, vibration and sonar signal capture, and DSP-based motor-control current sampling. The integrated reference and small wide-SOIC footprint make it well-suited for compact mixed-signal PCBs where board real estate is constrained. Its wide ±15 V input tolerance and input transient protection also support direct connection to op-amp current-shunt outputs and bridge sensors without external clamps. When designing with this ADC, ensure that the analog and digital grounds are tied only at one point and that the 24-pin wide SOIC (W) package has sufficient copper area for thermal dissipation. Decouple AVDD and DVDD with 22 µF || 0.1 µF tantalum/ceramic pairs as recommended in the datasheet, and strap the input-range and shutdown pins according to the desired ±5 V, ±3 V, 0-5 V, or shutdown mode at power-up. This page synthesizes distributor pricing, drop-in compatible MAX120/MAX122 family variants, and practical PCB decoupling/layout notes not always presented together in the manufacturer datasheet.
MAX1211ETL+T - 65Msps 12-Bit IF Sampling ADC | Analog Devices
The Analog Devices / Maxim Integrated MAX1211ETL+T is a 12-bit, 65Msps pipelined analog-to-digital converter (ADC) optimized for intermediate-frequency (IF) sampling in a 40-pin TQFN EP package (6 x 6 mm, 0.80 mm height, MO-220). It delivers 66.8 dB SNR and 79.7 dBc SFDR at fIN = 175 MHz, with a 400 MHz to 700 MHz input bandwidth that supports direct IF sampling, eliminating the need for external mixing stages in many communications and instrumentation front ends. The device is offered in an industrial temperature grade of -40 °C to +85 °C. What is an IF-sampling ADC? An ADC of this type is a data-conversion IC that digitizes analog signals whose carrier frequency lies in the intermediate-frequency (typically tens to hundreds of MHz) range. IF-sampling ADCs sit in the signal chain hierarchy between the RF front end and the baseband processor, and they are a category of high-speed pipeline converters within the broader class of data acquisition ICs. The MAX1211's wide analog input bandwidth lets designers place the ADC directly after the IF filter, simplifying board layout and reducing component count relative to traditional baseband-sampling architectures. Key features include a fully differential wideband track-and-hold (T/H) front end that accepts single-ended or differential inputs, selectable two's-complement or Gray-code CMOS-compatible parallel digital outputs, a data-valid indicator that removes the need for external timing components, and a low-power 3.3 V operating mode that consumes 314 mW in single-ended operation. The internal precision bandgap reference can be overridden by an external reference for design flexibility. Architecturally, the MAX1211 employs a multi-stage pipelined quantizer driven by a wideband track-and-hold, with proprietary calibration logic that linearizes the residue gain to deliver strong SFDR performance at high input frequencies. The 0.15 mW power-down mode preserves battery life during idle periods in portable or interrupt-driven systems. Typical applications include wireless infrastructure receivers (LTE/3G base stations), cable head-end equipment, radar digitizers, medical imaging front ends, and high-end instrumentation digitizers. The wide IF-sampling bandwidth also makes the part attractive for software-defined radio platforms and broadband test gear where the ADC digitizes an IF signal at the antenna interface. When designing with this device, engineers should pay close attention to input common-mode voltage, the differential T/H drive network, and clock jitter - which directly limits SNR at high fIN. Layout care for the analog and digital grounds is essential, and a low-jitter clock source is required to realize the datasheet's 66.8 dB SNR figure. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design guidance that go beyond the contents of the manufacturer datasheet alone.
MAX1215EGK+TD - 12-Bit 250Msps ADC | Maxim Integrated
The Maxim Integrated MAX1215EGK+TD is a monolithic 12-bit, 250Msps analog-to-digital converter (ADC) optimized for outstanding dynamic performance at high-IF frequencies, housed in a 68-pin QFN (10x10 mm) package. It operates from a single 1.8V supply and integrates an excellent low-noise front-end that delivers 65.5 dBFS SNR at fIN = 100 MHz and 65 dBFS SNR at fIN = 250 MHz with a -67.5 dBFS noise floor. The ADC achieves 70.7 dBc SFDR, providing wideband spurious-free dynamic range that is critical for broadband digital receivers and direct-IF downconverter chains. What is a high-speed ADC? An analog-to-digital converter (ADC) is a semiconductor device that samples a continuous analog input signal and converts it to a discrete digital codeword at a defined sampling rate. High-speed ADCs (>= 100 Msps) serve as the key bridge between the analog RF/IF domain and the digital signal processing domain in communications, radar, test equipment, and instrumentation systems. The MAX1215 belongs to the high-IF sampling ADC sub-category, where the analog input can be at tens to hundreds of MHz and the converter is typically followed by a digital downconverter (DDC) or FPGA fabric. The MAX1215EGK+TD features include a differential analog input with on-chip input buffer, an internal low-jitter clock multiplier, LVDS-compatible digital outputs, and built-in data-ready (DRDY) framing. Its pipelined internal architecture, combined with proprietary calibration, preserves linearity across process and temperature variations. Industrial temperature grade (-40C to +85C) is offered per the part's HVQCCN package code, making the device well-suited to commercial and industrial deployments. Typical applications include broadband digital receivers, multi-carrier UMTS/WCDMA and LTE base-station digitizers, instrumentation and digital oscilloscopes, radar IF sampling, and cable infrastructure downstream QAM receivers. The combination of 250 Msps sampling, excellent SFDR at high IF, and a compact 68-QFN footprint allows direct mounting on tight mezzanine cards close to the antenna or RF front-end. When designing with this part, allocate at least four PCB layers with dedicated power and ground planes, place 0.1 uF plus 10 uF ceramic bypass capacitors as close as possible to the AVDD pins, and route the LVDS output pairs as 100 ohm differential transmission lines with matched lengths. Provide a clean clock source because aperture jitter dominates SNR at high input frequencies. This page synthesizes distributor pricing, drop-in alternatives, and practical layout guidance that go beyond the manufacturer datasheet pinout and absolute maximums to help engineers shorten integration time.
MAX1217ECQ+TD - Dual 12-Bit 125Msps ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1217ECQ+TD is a dual, monolithic 12-bit, 125 Msps analog-to-digital converter (ADC) optimized for broadband signal-chain applications, packaged in a 100-pin TQFP-EP (14x14 mm) with gull-wing leads and an exposed thermal pad. The device integrates on-chip track-and-hold amplifiers, a low-drift low-noise buried-zener voltage reference, and operates from a single 1.8V analog supply, delivering outstanding dynamic performance at input frequencies up to 250 MHz. According to the manufacturer's product description, the MAX1217 is fabricated on a BiCMOS process that combines bipolar precision with CMOS logic density, achieving the high sample rate while keeping power dissipation moderate for its speed class. An ADC (analog-to-digital converter) is a data-acquisition component that samples continuous analog voltages and produces discrete digital codes. As a pipelined converter it sits in the signal chain between an analog front end (amplifier, anti-alias filter) and a downstream DSP (digital signal processor) or FPGA. ADC hypernyms include: data converter -> analog-to-digital converter -> pipelined ADC -> broadband ADC -> 12-bit ADC -> semiconductor -> integrated circuit. The MAX1217 family occupies the broadband-joint-to-low-noise portion of this taxonomy, with 2 input channels and 2 pipelined conversion cores per package. Key features include 12-bit resolution, 125 Msps sampling rate per channel (suitable for IF sampling in receivers), 70 dB SNR (typical) and SFDR > 80 dBc at low input frequencies, an internal buried-zener reference that eliminates an external reference IC, and CMOS-compatible digital outputs. The dual-channel architecture supports I/Q baseband sampling directly in a single chip, simplifying PCB area and BOM. The exposed-pad 100-pin TQFP enables low thermal impedance so the part sustains full-rate dual-channel sampling at industrial temperatures without derating. Typical applications include broadband cable downstream receivers, wireless base-station IF sampling, instrumentation digitizers, medical imaging front ends, and radar signal processing. When designing with the MAX1217, place input coupling caps close to each input pin and provide an independent analog and digital ground plane joined at the exposed pad. The +TD suffix denotes tape-and-reel delivery; -40C to +85C industrial operation is supported. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical layout notes not consolidated in any single manufacturer PDF.
MAX1218ECQ+D - Dual 12-Bit 170Msps ADC | Maxim Integrated
The Maxim Integrated MAX1218ECQ+D is a dual, monolithic, 12-bit, 170 Msps analog-to-digital converter (ADC) optimized for broadband and high-IF sampling applications, housed in a 100-pin exposed-paddle TQFP (HTFQFP) package. Key headline parameters include dual 12-bit resolution, 170 Msps per-channel sampling rate, and a single 1.8 V analog supply rail. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuously variable analog voltages into discrete digital codes for processing by DSPs, FPGAs, or microcontrollers. The MAX1218ECQ+D belongs to the high-speed pipelined ADC category, which sits hierarchically under data converters, mixed-signal ICs, and integrated circuits (ICs). Pipelined ADCs use a switched-capacitor multi-stage architecture to achieve sample rates well beyond what successive-approximation (SAR) ADCs can deliver, while maintaining 10-14 bit resolution typical of communications, instrumentation, and defense systems. The device integrates two matched 12-bit ADC cores that share a common input clock and reference, supporting simultaneous sampling of in-phase (I) and quadrature (Q) baseband or intermediate-frequency (IF) signals. It features excellent dynamic performance, including high signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) suitable for multicarrier communication receivers. The MAX1218ECQ+D operates from a single 1.8 V supply and is specified over the extended industrial -40°C to +85°C temperature range. Typical applications include broadband cable CMTS downstream receivers, cellular base-station digitizing IF stages, medical imaging front ends (ultrasound beamformers), radar/electronic-warfare IF sampling, and instrumentation digitizers. When paired with a low-jitter clock source and a high-bandwidth differential front-end driver, the MAX1218ECQ+D delivers the dynamic range needed for multi-carrier QAM and OFDM signal chains. When designing with this ADC, prioritize clock-jitter minimization because the SNR ceiling scales inversely with aperture jitter; the datasheet specifies an aperture jitter requirement of sub-picosecond rms. Use a fully differential input topology with a dedicated ADC driver such as the MAX2055 or a comparable low-noise op-amp, and decouple the analog and digital 1.8 V rails with ferrite beads to prevent digital switching noise from coupling back into the analog front end. This page synthesizes distributor pricing, drop-in pin-compatible variants (MAX1217 at 125 Msps and MAX1219 at 210 Msps), and practical PCB-layout and clock-design notes that go beyond the manufacturer datasheet alone.
MAX1218ECQ+TD - Dual 12-Bit 170Msps ADC, 100-TQFP | Maxim Integrated
The Maxim Integrated MAX1218ECQ+TD is a dual, monolithic, 12-bit, 170Msps analog-to-digital converter (ADC) supplied in a 100-pin HTFQFP package with an exposed thermal paddle. Per the manufacturer datasheet, the part is specified for industrial-grade operation over the -40C to +85C extended temperature range and provides one of the highest sample-rate-per-watt combinations in its class for broadband signal acquisition. What is a high-speed ADC: A high-speed analog-to-digital converter is a data-conversion integrated circuit that samples continuous analog signals at multi-megasample-per-second rates and produces a parallel or serial digital code, allowing wideband signals in the MHz to hundreds-of-MHz range to be digitized for downstream DSP, FPGA, or ASIC processing. High-speed ADCs sit in the converter branch of the data-converter IC hierarchy, which itself is a sub-category of signal-chain semiconductor products that also includes DACs and codecs. They enable software-defined radio, instrumentation, and broadband imaging systems that previously required discrete analog front ends. Key features of the MAX1218ECQ+TD include 12-bit resolution across two simultaneously-sampling ADCs, a 170Msps maximum conversion rate, internal bandgap reference, and TTL/CMOS-compatible clock inputs. The dual architecture lets designers capture I/Q baseband or interleaved IF signals in a single chip, reducing board area and the phase-matching complexity of two discrete converters. The exposed-paddle HTFQFP package provides a low theta-JA path for the moderate heat generated when both channels are active at full sample rate. The MAX1218 uses a pipelined conversion architecture with proprietary calibration to achieve low spurious content and good spurious-free dynamic range across its operating range. The device operates from a single 1.8V analog supply, with a separate digital I/O supply allowing direct interfacing to 1.8V to 3.3V logic families without external level shifters. Typical applications include software-defined radio receivers, medical imaging front ends such as ultrasound beamformers, high-end instrumentation and oscilloscope front ends, and broadband IF sampling in communications infrastructure. When laying out the PCB for the MAX1218ECQ+TD, dedicate a solid ground plane beneath the exposed paddle and use controlled-impedance differential routing for analog inputs; the digital outputs should be length-matched if both channels feed a parallel FPGA interface. Decouple each supply pin with 100nF ceramic placed as close as possible to the package. This page synthesizes distributor pricing, pin-compatible drop-in alternatives drawn from the same Maxim ADC family, and practical layout notes beyond what is reprinted in the manufacturer datasheet PDF.
MAX1219ECQ+D - 12-Bit 210Msps Dual ADC | Maxim Integrated
The Maxim Integrated MAX1219ECQ+D (now under Analog Devices/Maxim Integrated) is a 1.8V, dual-channel, 12-bit analog-to-digital converter (ADC) sampling at up to 210 Msps, designed for broadband communications and high-IF signal-path applications. The converter integrates two 12-bit ADC cores that can be operated independently or time-interleaved, delivering a combined throughput that supports wideband multi-standard receivers in wireless base-station and cable-infrastructure designs. An ADC (analog-to-digital converter) is a data-acquisition component that samples continuous analog waveforms and quantizes each sample to a discrete digital code at a defined sample frequency (Fs). The MAX1219ECQ+D belongs to the high-speed pipeline-ADC class, a sub-category of integrated data converters within power management and signal-chain semiconductors. Pipeline ADCs trade modest latency (typically 3-5 clock cycles) for high sample rate and low power per conversion, making them the dominant architecture for IF digitization between 10 MHz and 200 MHz where SAR ADCs cannot keep up and flash ADCs burn excessive current. Key performance features include 210 Msps maximum conversion rate per channel, 12-bit resolution, 1.8V single supply operation, low power dissipation typical of CMOS pipeline ADCs, and a clock-duty-cycle equalizer that maintains SNR across non-50% clock sources. The internal reference and differential analog inputs simplify front-end design by eliminating external reference buffers and allowing direct coupling to differential IF stages from upstream mixers and baluns. Typical applications include multi-carrier GSM/EDGE base-station receivers, WiMAX and LTE broadband wireless links, cable modem head-ends, and set-top box tuners where the dual channels handle I/Q or diversity paths. The wide full-power input bandwidth and broadband spurious-free dynamic range also suit it to test-and-measurement digitizers and medical ultrasound beamformers. The clock-duty-cycle equalizer is internally fixed and not externally disable-able. When designing with this device, follow the reference-layout guidelines closely because the 210 Msps edge rates couple aggressively into analog traces. Keep input traces length-matched, provide solid ground stitching around the analog and clock pins, and place input RC anti-alias networks within 100 mils of the analog inputs to preserve SNR.
MAX1219ECQ+TD - Dual 12-Bit 210Msps ADC, 1.8V | Maxim Integrated
The Maxim Integrated MAX1219ECQ+TD is a 1.8V, dual-channel, 12-bit analog-to-digital converter (ADC) sampling at 210 Msps, optimized for broadband communications and high-IF signal-path applications. The device integrates two matched 12-bit ADC cores, a clock duty-cycle equalizer, and a shared reference into a 100-pin HTFQFP exposed-pad package (ECQ suffix). The 1.8 V analog/digital supply interface simplifies interface logic to modern FPGAs and baseband ASICs. An analog-to-digital converter (ADC) is a mixed-signal data converter that samples continuous-time analog waveforms into discrete digital codes at a defined sample rate (sps = samples per second). The MAX1219 belongs to the high-speed pipelined ADC family, a subclass of Nyquist-rate data converters used in wired/wireless baseband, instrumentation, and radar receivers. Within the power-management hierarchy of a typical broadband radio, the ADC sits downstream of the LNA/mixer and upstream of the digital baseband, and its dynamic performance (SFDR, SFDR) directly bounds the receiver's spurious-free dynamic range. The headline parameters include 210 Msps minimum sample rate per channel, 12-bit resolution, 70.1 dBFS SINAD (typical) at 100 MHz input and 210 Msps, 78 dB SINAD (per the secondary datasheet listing), 80 dBFS SFDR at -1 dBFS, a 1.8 V core supply with 3.3 V tolerant digital outputs, and an integrated differential clock receiver with duty-cycle equalizer. The duty-cycle equalizer cannot be disabled externally and requires a minimum 40 MHz clock to meet datasheet specifications. The device is built on a bipolar CMOS-DMOS process and uses a fully differential pipelined architecture with proprietary internal calibration that corrects capacitor mismatch on power-up. Per-channel offset and gain trim is supported via the serial control interface. The HTFQFP-100 exposed-pad package provides a low thermal-resistance path for the multi-hundred-milliwatt single-channel and dual-channel dissipation budget. Typical applications include cellular base-station receivers (GSM/EDGE/W-CDMA/LTE), broadband cable head-end CMTS upstream capture, digital predistortion (DPD) feedback paths in power amplifiers, radar and electronic-warfare intermediate-frequency digitization, and instrumentation digitizers. The dual matched core enables I/Q baseband sampling from a single chip. Designers should place the clock source within 1 cm of the CLK+ and CLK- pins, route CML/LVDS outputs with 50 ohm controlled impedance, and bond the EP pad to a low-impedance ground island with multiple thermal vias. Reference decoupling must use 10 uF plus 0.1 uF ceramics located within 3 mm of the REF pins to meet 78 dB SINAD on the AIN inputs. The clock duty-cycle equalizer's 40 MHz minimum clock constraint must be observed or supply current can rise by up to 40 mA with random output toggling, as noted in the Maxim datasheet.
MAX121MJE - 14-bit 308ksps Serial ADC, CDIP-16 | Maxim/ADI
The Maxim Integrated (Analog Devices) MAX121MJE is a complete BiCMOS, serial-output, 14-bit sampling analog-to-digital converter (ADC) that integrates an on-chip track/hold amplifier and a low-drift, low-noise buried-zener voltage reference. The MAX121MJE is specified at 308 ksps conversion rate with 78 dB SINAD (signal-to-noise + distortion), is housed in a 16-pin CDIP (Ceramic DIP) through-hole package, and is qualified to the military temperature range of -55C to +125C. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital words. Successive-approximation (SAR) ADCs, such as the MAX121, perform a binary search through an internal capacitive DAC during each conversion cycle, producing accurate results with no pipeline latency - making them well suited to multiplexed data acquisition and DSP input stages. The MAX121 family hierarchy is: SAR ADC -> ADC -> data converter -> mixed-signal IC -> semiconductor. Key differentiating specifications include a serial DSP-compatible interface (compatible with TMS320 serial ports), 78 dB SINAD at the input frequency of 100 kHz, 1.1 MHz to 5.5 MHz external clock range, bipolar input range of +/-5 V (with proper reference), low power consumption of approximately 30 mW at 308 ksps, and a buried-zener reference with low drift. All logic inputs and outputs are TTL- and CMOS-compatible, simplifying interface to legacy 5 V digital systems. Architecturally, the MAX121 uses a charge-redistribution DAC and a laser-trimmed buried-zener reference. The track/hold amplifier at the front end acquires the input within the same clock cycle that the SAR engine performs conversion, eliminating need for an external sample-and-hold IC. Compared to lower-speed integrating ADCs, the MAX121's 308 ksps rate enables wide-bandwidth signal capture while preserving 14-bit resolution. Typical applications include precision data acquisition systems, sonar and vibration analysis front ends, digital signal processing (DSP) input stages, instrumentation digitizers, and military/aerospace signal chains. The CDIP-16 ceramic package combined with MIL temperature grade makes the MAX121MJE especially suited to harsh-environment designs requiring hermetic packaging. When designing with this device, ensure the analog input remains within the common-mode range of the chosen reference configuration and that the external clock (1.1 MHz to 5.5 MHz) is stable and jitter-free. The serial interface is configured for DSP-mode serial output, so the host processor must support a compatible synchronous serial frame. This page synthesizes distributor pricing, MIL-grade pin-compatible alternatives, and design considerations not found in the bare datasheet - giving engineers a single source for MAX121MJE sourcing and replacement decisions.
MAX1224CTC+ - 12-Bit 1.5Msps SAR ADC | Maxim Integrated | TQFN-12
The Analog Devices (formerly Maxim Integrated) MAX1224CTC+ is a 12-bit, 1.5 Msps successive-approximation-register (SAR) analog-to-digital converter with a single true-differential input channel, housed in a 12-pin TQFN (4x4 mm) package. It operates from a single +2.7V to +3.6V supply, drawing only a few mA of supply current at full sampling rate, and provides a high-speed SPI/QSPI/MICROWIRE-compatible digital interface for direct connection to microcontrollers and DSPs. An ADC (analog-to-digital converter) is a data-acquisition integrated circuit that samples a continuous analog voltage and converts it into a discrete digital code. SAR ADCs use a binary-search successive-approximation algorithm that delivers a complete conversion in a fixed number of clock cycles, making them ideal for multiplexed data acquisition, instrumentation, and control loops. The MAX1224 belongs to the data converter -> ADC -> SAR ADC -> precision 12-bit ADC family within Maxim's mixed-signal IC portfolio. Key specifications include a 12-bit resolution with no missing codes, 1.5 Msps sampling rate, true-differential analog inputs, SPI-compatible serial output, and low-power operation. Per the Maxim datasheet, the device features an internal 2.5V reference (or accepts an external reference) and a shutdown mode that reduces supply current to a few microamps between conversions. The TQFN-12 (4x4 mm) package is halogen-free and qualified for the commercial temperature range of 0C to +70C. The MAX1224 architecture uses a charge-redistribution DAC array combined with a precision comparator and SAR control logic. The true-differential input structure rejects common-mode noise and ground bounce, enabling accurate conversion in electrically noisy industrial environments. The integrated track-and-hold eliminates the need for an external front-end amplifier in many single-ended applications. Typical applications include industrial process control, portable data loggers, battery-powered instrumentation, motor control feedback loops, and optical-sensor signal conditioning. The combination of single-supply operation, true-differential input, and a tiny TQFN package suits space-constrained embedded designs. When designing with this device, place 0.1uF decoupling capacitors as close as possible to the supply and GND pins. Use a low-impedance ground plane and keep analog and digital traces separated to avoid coupling noise into the reference or analog input. This page synthesizes distributor pricing, parametric alternatives, and design notes not found in the manufacturer datasheet alone, helping engineers quickly evaluate the MAX1224CTC+ for drop-in placement in precision data-acquisition channels.
MAX1225CTC+ - 12-Bit 1.5Msps Differential ADC | Maxim Integrated
The Maxim Integrated MAX1225CTC+ is a 12-bit, 1.5Msps, single-supply, low-power, true-differential, serial-output analog-to-digital converter (ADC) housed in a 12-pin TQFN (Thin Quad Flat No-lead) package with exposed pad. It operates from a single +3V supply (2.7V to 3.6V) and consumes only 9mW at full speed, with an automatic power-down between conversions that reduces dissipation to less than 1mW at slower throughputs. The differential input architecture delivers 70dB SNR and 86dBc SFDR, enabling true-differential signal acquisition that rejects common-mode noise in industrial and instrumentation environments. An ADC (analog-to-digital converter) is a semiconductor device that samples continuous analog voltage signals and converts them into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the broader taxonomy, the MAX1225CTC+ belongs to successive-approximation-register (SAR) ADCs, which sit under the data-converter IC family and the data-acquisition product category. SAR ADCs are prized for deterministic latency, low power consumption, and the absence of pipeline delay, making them ideal for multiplexed multi-channel systems and event-triggered sampling. Key features of the MAX1225CTC+ include a high-speed SPI/QSPI/MICROWIRE-compatible serial interface, true-differential analog inputs with ±VREF input range, an internal 2.5V reference (with the option to use an external reference), and a 12-pin TQFN package measuring just 4mm x 4mm. The device supports both internal and external clock operation and offers an active-low shutdown pin to minimize idle current. The exposed thermal pad lowers junction-to-ambient thermal resistance, supporting reliable operation across the -40C to +85C commercial temperature range. The MAX1225CTC+ uses a charge-redistribution SAR architecture and an input track-and-hold capable of handling signals beyond the Nyquist frequency with minimal distortion. At 1.5Msps, the converter settles in approximately 670ns per conversion, and the serial data interface shifts out the 12-bit result MSB-first in 12 clock cycles, allowing easy connection to most modern microcontrollers. The internal reference is trimmed to ±1% accuracy, eliminating the need for external reference components in cost-sensitive designs. Typical applications include data acquisition systems, industrial process control, portable instrumentation, and medical monitoring equipment. It is also well suited for motor control feedback, weigh scales, and remote sensor interfaces where true-differential inputs reject ground-loop noise in long cable runs. The combination of single 3V supply operation and low power consumption makes it attractive for battery-powered handheld instruments. When designing with this ADC, ensure the input common-mode voltage stays within the specified 0.1V to VDD-0.1V range for true differential sampling. Bypass the supply pin with a 0.1uF ceramic capacitor placed as close as possible to the exposed pad, which must be soldered to the ground plane for thermal dissipation. For best SNR performance, drive the differential inputs with low-impedance op-amps such as the MAX4162 or MAX4245. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet alone, giving engineers a one-stop reference for sourcing and applying the MAX1225CTC+ in real designs.
MAX1225CTC+T - 12-Bit 1.5Msps Diff ADC | Maxim Integrated
The Maxim Integrated MAX1225CTC+T is a 12-bit, 1.5Msps, single-supply, low-power, true-differential analog-to-digital converter (ADC) with a serial interface, housed in a 12-pin TQFN (HVQCCN) package. It accepts differential analog inputs, operates from a 2.7V to 3.6V analog supply plus a separate 2.7V to 5.25V digital interface supply, and delivers true-differential inputs with unipolar or bipolar input ranges through external reference and signal conditioning. Key features include successive-approximation register (SAR) architecture, throughput up to 1.5Msps, integrated track-and-hold, low power consumption (typically under 10 mW at full speed), and an SPI/QSPI/MICROWIRE-compatible serial data interface. The true-differential input stage provides inherent common-mode noise rejection, which simplifies PCB layout in noisy industrial environments and improves effective resolution when digitizing small signals riding on top of large DC offsets. The MAX1225CTC+T uses a charge-distribution SAR core with input signal scaling and a dedicated reference input. The internal conversion clock is derived from the serial interface, removing the need for an external high-frequency oscillator. Its internal reference structure supports both internal and external reference modes, allowing designers to trade absolute accuracy for flexibility. Typical applications include industrial process control, data-acquisition systems, motor control feedback, instrumentation, and portable or battery-powered measurement equipment. The differential input and high sampling rate also make it suitable for vibration analysis, multi-axis position sensors, and signal conditioning in noisy electrical environments. Designers select the MAX1225 when both throughput and low-power serial-interface connectivity are required. When designing with this device, decouple both AVDD and DVDD locally with 0.1 uF and 10 uF ceramics, route analog and digital grounds as a star, and place the input RC network as close to the input pins as possible to preserve the wide analog bandwidth. Use a low-noise external reference when absolute accuracy is required; for the lowest drift, tie REF to a buffered bandgap. This page synthesizes distributor pricing from authorized channels, drop-in same-package alternatives, and practical PCB-level design notes not found in the bare manufacturer datasheet.
MAX1225ETC+ - 12-Bit 1.5Msps SAR ADC | Maxim Integrated
The Maxim Integrated MAX1225ETC+ (now under Analog Devices / Maxim Integrated) is a 12-bit, 1.5Msps, true-differential, serial-output, single-supply analog-to-digital converter (ADC) housed in a 12-pin TQFN (4x4) package with an exposed thermal pad. It delivers up to 1.5 million samples per second from a true-differential analog input, with an SPI/QSPI/MICROWIRE-compatible serial interface. The MAX1225ETC+ operates from a single 2.7V to 3.6V analog supply, making it suitable for low-power precision instrumentation. A successive-approximation (SAR) ADC is a member of the data-converter family that performs a binary-search conversion cycle on the analog input using an internal capacitive DAC. SAR ADCs are valued for their deterministic latency (one conversion cycle, no pipeline delay), excellent DC accuracy, and low power consumption at modest sample rates. The MAX1225ETC+ belongs to the Maxim/ADI precision ADC family (MAX1117-MAX1225 series), positioning it between slow precision sigma-delta converters and high-speed pipeline ADCs, and ideal for instrumentation, motor control, and data-acquisition systems. Key features include 1.5Msps throughput, true-differential analog inputs that reject common-mode noise, an integrated +2.5V internal reference (with external-reference option), low power dissipation (typically under 25mW at full speed), and a 4-wire SPI/QSPI/MICROWIRE-compatible digital interface. The 12-pin TQFN (4x4) package offers a compact footprint with an exposed pad for improved thermal performance and PCB ground reference. The MAX1225ETC+ uses a charge-redistribution SAR architecture with input tracking and hold, achieving INL typically within +/-0.5 LSB and DNL within +/-0.5 LSB for true 12-bit linearity. The integrated +2.5V reference provides tight initial accuracy and low drift, eliminating the need for an external reference in many applications. Typical applications include portable data-acquisition systems, process and motor control loops, industrial instrumentation, optical-sensor front ends, and medical instrumentation. The differential input architecture also suits it for transducer-bridge signal chains and thermocouple amplification where ground-noise rejection is critical. When designing with this device, place the 0.1uF input/output bypass capacitors as close as possible to the supply pins, and connect the exposed pad to a clean analog ground plane. The serial clock can run up to ~24MHz at 1.5Msps, so route SCLK/SDOUT traces over a continuous ground plane to preserve signal integrity. This page synthesizes distributor stock and pricing, drop-in pin-compatible alternatives, and practical layout guidance not always presented in the manufacturer datasheet.
MAX1228ACEP+ - 12-Bit 300ksps 12-Ch ADC + Temp Sensor | Maxim
The Maxim Integrated (now Analog Devices) MAX1228ACEP+ is a 12-bit, 300 ksps, 12-channel successive-approximation analog-to-digital converter with an internal 4.096 V reference, internal temperature sensor (±1 degree C accuracy), 16-entry FIFO, and AutoShutdown. Housed in a 20-pin QSOP (SSOP) package with gull-wing leads, this serial-output ADC combines a true-differential analog multiplexer, scan mode, internal averaging, and an internal clock mode, all consuming a few milliwatts from a single 4.75 V to 5.25 V analog supply. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-conversion topology that resolves a sample one bit at a time using an internal DAC and comparator, achieving 12-bit resolution in tens of microseconds without the latency or pipeline delay of a pipelined converter. SAR ADCs sit in the broader hierarchy of data converters (ADC), under mixed-signal ICs and integrated circuits, and are preferred for multiplexed precision sampling in industrial control and instrumentation where low latency and DC accuracy matter more than multi-MHz sampling rates. Key features include 12-bit resolution with no missing codes, 300 ksps maximum throughput on a single channel, an analog multiplexer with 6 or 12 inputs that can be configured as single-ended or pseudo-differential channels, an internal 4.096 V reference with low drift, and a 16-entry FIFO that offloads the host controller by allowing burst conversions without per-sample interrupt overhead. The integrated temperature sensor with plus or minus 1 degree C accuracy eliminates an external thermistor for system thermal monitoring. Architecture-wise, the MAX1228 uses a charge-redistribution DAC in the SAR loop, an input track-and-hold that accepts true-differential inputs common-mode up to the rails, an SPI/QSPI/MICROWIRE-compatible serial interface, and a sequencer that supports both scan mode (autonomous channel cycling) and single-channel conversions. AutoShutdown reduces supply current to a few microamps between conversions, making the part attractive for battery-backed data loggers. Typical applications include process control and factory automation, multichannel data acquisition systems, patient monitoring and medical instrumentation, portable battery-powered data loggers, and system temperature monitoring with sensor compensation. When designing with this ADC, place the 0.1 uF AVVDD bypass and the 10 uF reference bypass capacitor within 5 mm of their respective pins. For best noise performance, use a buffered external reference source if the internal 4.096 V ref accuracy is insufficient for the application - the reference pin can source up to 1 mA. This page synthesizes distributor pricing, drop-in same-package alternatives, parametric comparisons, and practical design notes beyond the bare datasheet, including a same-package vs same-package trade-off matrix.
MAX1228ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim
The Maxim Integrated MAX1228ACEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (ADC) with a 6/12-channel analog multiplexer, internal 4.096 V reference, internal temperature sensor (±1°C accuracy), and a 16-entry first-in/first-out (FIFO) buffer, packaged in a 20-pin QSOP (SSOP). It accepts single-ended analog inputs across a -12 V to +12 V true bipolar input range (software configurable), making it suitable for industrial sensor interfaces, process-control loops, and battery-monitoring systems. An SAR ADC is a type of analog-to-digital converter that uses a charge-redistribution DAC and a comparator to resolve one bit per clock cycle, achieving deterministic latency and low pipeline delay. Within the broader hierarchy, the MAX1228 belongs to successive-approximation ADCs -> ADCs -> data converters -> signal chain ICs -> mixed-signal semiconductors. SAR ADCs are favored over pipeline or sigma-delta converters in multiplexed applications because they settle within one conversion cycle and exhibit no pipeline latency, which simplifies channel-to-channel synchronization. Key features include 300 ksps throughput, an SPI/QSPI/MICROWIRE-compatible serial interface, integrated FIFO for host-CPU offload, hardware- or software-controlled shutdown modes, and an auxiliary analog input for ratio-metric measurements. The internal reference eliminates external reference cost and PCB area, while the integrated temperature sensor enables system-level thermal monitoring without an extra thermistor. Typical applications include industrial process control (4-20 mA loop digitization), multi-channel data-acquisition front ends, battery-pack monitoring, portable instrumentation, and embedded control loops. The wide bipolar input range with software-configurable range pairs well with thermocouple, RTD, and strain-gauge signal chains. Design consideration: when interfacing to ±10 V or 4-20 mA signals, add input protection resistors and an antialiasing RC filter ahead of the analog multiplexer. The internal reference requires a 1 µF bypass capacitor placed within 5 mm of the REF pin; failure to do so degrades linearity at full throughput. This page synthesizes cross-brand drop-in alternatives, parametric comparison, and practical design notes not found in the manufacturer datasheet alone.
MAX1228AEEP+ - 12-Bit 300ksps 12-Ch ADC w/ FIFO & Temp | Maxim
The Maxim Integrated MAX1228AEEP+ is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (ADC) with 6 or 12 analog input channels, an internal 4.096V reference, an internal temperature sensor (±1°C accuracy), and a 16-entry first-in/first-out (FIFO) buffer, housed in a 20-pin QSOP package. It operates from a single 5V analog supply (4.75V to 5.25V) and supports a separate 2.7V to VDD digital supply for flexible logic-level interfacing. What is an SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-conversion architecture that uses an internal comparator, a DAC, and a register to binary-search the input voltage over N clock cycles for an N-bit result. SAR ADCs offer an excellent balance of speed, resolution, and power consumption, making them the dominant choice for multiplexed multi-channel data-acquisition systems in industrial control, instrumentation, and sensor monitoring. Key features of the MAX1228AEEP+ include a true-differential analog multiplexer with bipolar input modes (±VREF/2, ±VREF, 0 to VREF), 16-entry FIFO for reduced host-processor overhead, scan-mode automatic channel sequencing, an SPI/QSPI/MICROWIRE-compatible serial interface, and a dedicated REF pin for an optional external reference. The internal reference settles quickly and offers ±2 LBP (least-significant-bit) initial accuracy at 25°C, supporting 12-bit performance without external precision components. The MAX1228AEEP+ integrates signal conditioning and conversion on a single die: a track/hold amplifier, the SAR engine, the reference, the FIFO, and a bandgap temperature sensor. This integration reduces board space and BOM cost in multi-channel systems while keeping digital noise isolated from the analog supply via separate AVDD/DVDD pins. Typical applications include process-control data acquisition, HVAC and building-automation sensor monitoring, medical instrumentation, weigh scales, 4-20 mA loop monitoring, and portable or rack-mounted industrial instruments requiring 12-bit precision across multiple analog sensor channels plus onboard temperature compensation. Designers should observe star-ground separation between AVDD and DVDD, place the 10 µF bypass and 0.1 µF decoupling within 5 mm of the supply pins, and use the FIFO to relax timing on burst-mode conversions. The internal reference can be overdriven by an external reference for ratiometric measurements with bridge sensors. This page synthesizes verified distributor pricing and stock, drop-in alternative recommendations, and practical design notes not duplicated in the manufacturer datasheet.
MAX1228AEEP+T - 12-Bit 300ksps ADC, 12Ch SAR | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1228AEEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter with 12 input channels, an internal 4.096V reference, an internal temperature sensor, and a 16-entry FIFO, housed in a 20-pin QSOP package. The serial-interface ADC operates from a +5V analog supply and a +1.8V to +5.25V digital supply, drawing only a few milliamps in normal operation. A successive-approximation ADC is a sampled-data converter that uses an internal DAC and comparator to perform a binary search over 12 clock cycles, producing an exact 12-bit code for each conversion. This architecture combines the speed advantage of flash-style sampling with the small die area of integrating converters, making SAR ADCs the dominant choice for multiplexed data-acquisition systems, industrial control loops, and embedded instrumentation. Within the converter hierarchy, the MAX1228 belongs to the precision low-power SAR family, the category that sits between high-speed pipeline ADCs (used in oscilloscopes and software-defined radios) and low-speed delta-sigma converters (used in weigh scales and temperature loggers). Key features of the MAX1228 include 12 analog input channels plus two additional channels dedicated to the internal temperature sensor and the supply monitor, an integrated ±1 C accuracy temperature sensor suitable for system health monitoring, an internal FIFO that allows the host to sleep while up to 16 conversions accumulate, and true-differential track-and-hold inputs that reject common-mode noise from industrial bus signals. The part provides a standard SPI/QSPI/MICROWIRE-compatible serial interface, supports a programmable scan mode that sequences channels automatically, and includes user-configurable analog input protection to ±12V. Internally, the device uses a charge-redistribution DAC architecture with an on-chip 4.096 V buried-zener reference and a high-bandwidth track/hold; the converter achieves 70 dB SINAD and better than ±1 LSB INL/DNL at full speed. Its low-latency serial output and small package make it well suited for board-level data acquisition where board real estate and host processor overhead are limited. Typical applications include industrial process control and loop monitoring, multi-zone temperature scanning for HVAC and server rooms, portable and battery-powered instrumentation, and rack-mounted data-acquisition front ends where the on-board FIFO offloads timing-critical service routines from the main CPU. When designing with this ADC, bypass both the analog VDD and digital VDD pins with 0.1 F and 10 F ceramic capacitors placed within a few millimeters of the package, and keep analog and digital grounds separated until they join at a single star point under the IC. The MAX1228 requires a minimum of 8 analog inputs to be configured for valid scan mode operation; unused inputs should be tied to AVDD/2 through a 10 k resistor to minimize leakage-induced distortion. This page synthesizes distributor pricing (as of 2026-10-14), drop-in alternatives sourced from Maxim/Analog Devices and cross-reference web data, and practical design notes not found in the manufacturer datasheet alone.
MAX1228BEEP+TG002 - 12-Bit 300ksps ADC with FIFO | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1228BEEP+TG002 is a 12-bit, 300 ksps, low-power, serial-output, multichannel analog-to-digital converter (ADC) with integrated temperature sensor and internal reference, housed in a 20-pin QSOP package. The part features on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown to reduce supply current between conversions, making it well suited to battery-powered data acquisition systems. The TG002 suffix denotes the tape-and-reel packaging variant from the MAX1226/MAX1228/MAX1230 family. A successive-approximation-register (SAR) ADC is a converter topology that uses a binary-weighted capacitor network and a comparator to digitize an analog input in N clock cycles for an N-bit result. SAR ADCs are valued for their deterministic latency, lack of pipeline delay, and excellent DC accuracy - properties that make them ideal for multiplexed multi-channel applications, precision sensor readout, and industrial process control where a known sampling instant matters. Key features include 12-bit resolution, 300 ksps sampling rate, internal 4.096 V reference, internal temperature sensor with -40C to +85C operating range, 6- or 12-channel single-ended or differential input multiplexer, on-chip FIFO for up to 16 conversions, AutoShutdown mode that drops supply current to under 1 microampere between samples, and a 20 MHz SPI/QSPI/MICROWIRE-compatible serial interface. The 20-pin QSOP footprint occupies 5.0 mm x 5.6 mm of board area for compact front-end modules. The MAX1228 uses a charge-redistribution SAR core with input track-and-hold, with the analog inputs overdriven-tolerant to the supply rails. The internal reference is trimmed to within 1 percent accuracy and supports ratiometric measurements using an external REF. An internal temperature sensor exploits the proportional-to-absolute-temperature behavior of a bipolar transistor junction, allowing the host to perform cold-junction compensation or thermal monitoring with the same ADC front-end. Typical applications include 4-20 mA industrial loop transmitters, multi-zone temperature monitoring, portable data loggers, PLC analog input modules, and medical patient-monitoring front ends. The internal FIFO eases host processor burden in real-time control loops. When designing with this ADC, observe the input RC network recommended in the datasheet and place the 1 nF CIN and 10 nF REF bypass capacitors within 5 mm of their respective pins to preserve AC performance. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not found in the bare manufacturer datasheet.
MAX1229ACEP+ - 12-Bit 300ksps 12-Ch SAR ADC | Maxim Integrated
The Maxim Integrated MAX1229ACEP+ is a 12-bit, 300 ksps, 12-channel successive-approximation analog-to-digital converter (SAR ADC) with an internal reference, internal temperature sensor, and a built-in FIFO, housed in a 20-pin QSOP package. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm combined with an internal DAC to convert an input voltage into a digital code. SAR ADCs are favored for medium-resolution, high-throughput, low-latency conversions because every conversion completes in a fixed number of clock cycles with no pipeline delay. Within the broader signal-chain hierarchy, the MAX1229 sits at the conversion stage between analog front ends (amplifiers, multiplexers, sensors) and digital processors (MCUs, FPGAs, DSPs), and it belongs to Maxim's MAX1227/MAX1229/MAX1231 family of multi-channel precision converters. Key specifications include 12-bit resolution, 12 analog input channels (6 in differential mode), a 300 ksps maximum sampling rate, an internal 4.096 V reference, an internal temperature sensor with ±1 °C accuracy, and a 25-sample FIFO that offloads interrupt service on the host. The serial interface is SPI/QSPI/MICROWIRE-compatible, which simplifies connection to most microcontrollers and DSPs. An integrated 16-channel analog input mux allows direct connection to a bank of sensors without external switching. Architecturally, the device pairs a charge-redistribution DAC with a precision comparator and on-chip calibration logic, allowing the converter to deliver 12-bit linearity without external trimming. The internal reference is factory-trimmed for low drift, and the wide 2.7 V to 3.6 V analog/digital supply range supports single-rail 3.3 V systems as well as battery-powered designs. Typical applications include industrial data acquisition, multi-sensor monitoring boards, patient-monitoring front ends, and portable instrumentation that benefits from the integrated FIFO and temperature sensor. Engineers choose this part when they need to scan multiple analog channels quickly while keeping the host MCU free for higher-level tasks. A practical design consideration is that the analog input signals must be referenced to the same ground as the AGND pin, and decoupling must be placed close to AVDN and DVDD pins to keep the internal reference stable under load. Use the FIFO depth to buffer burst conversions, allowing the host to sleep between conversions and reduce average power.
MAX1229ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim
The Maxim Integrated MAX1229ACEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter with 6-/12-channel input mux, on-chip FIFO, internal temperature sensor and internal reference, offered in a 20-pin QSOP (also designated 20-SSOP) package. It combines a high-speed serial ADC interface with system-monitoring features typically reserved for dedicated supervisors, making it well suited to mixed-signal data-acquisition boards that also need temperature telemetry. An ADC (analog-to-digital converter) is an integrated circuit that samples a continuous analog voltage and quantizes it into a discrete digital code. The MAX1229 belongs to the successive-approximation register (SAR) family of converters, which use a binary-search algorithm and an internal capacitive DAC to resolve each conversion in one conversion cycle. SAR ADCs sit below delta-sigma and pipelined converters in resolution-vs-speed trade-off, and they are valued for deterministic latency, low power, and excellent dc accuracy - which is why they are a workhorse for industrial control, instrumentation and multi-channel sensor monitoring. Key features include 12-bit resolution, 300 ksps maximum sampling rate, an internal 2.5 V reference (with the option to override with an external reference), six analog inputs plus six digital companions yielding 12 single-ended or 6 true-differential channels, a 16-entry FIFO that offloads the host SPI port, and an integrated diode-based temperature sensor with ±1°C typical accuracy. The serial interface is SPI/QSPI/MICROWIRE-compatible, allowing direct connection to most microcontrollers and DSPs. The MAX1229 also integrates a programmable scan mode, four GPIO-like digital inputs that can be read through the serial port, an analog watchdog with dedicated interrupt output, and a power-down pin that drops quiescent current to a few microamps between conversions. The internal reference and FIFO together minimize external component count - designers usually need only bypass capacitors and the SPI lines to bring up a complete multi-channel data-acquisition front end. Typical applications include industrial process control and PLC analog input modules, rack-mounted and bench test-and-measurement instruments, portable battery-powered data loggers, medical patient-monitoring peripherals, and any system that wants on-board temperature telemetry of its own analog front end. The wide digital-supply range (2.7 V to 5.5 V for DVDD) also simplifies interface to 3.3 V and 5 V microcontrollers. When designing with this part, allocate one decoupling capacitor per supply pin (10 µF bulk plus 0.1 µF ceramic as close to the IC as practical), keep analog and digital grounds joined at a single star point under the IC, and respect the 225°C/W θJA of the QSOP body - it is fine for normal operation but should not be buried under heavy copper pours that block thermal relief. The FIFO depth should be sized larger than the longest SPI-burst latency your host can tolerate without overrun. This page consolidates the manufacturer datasheet, distributor stock, drop-in alternatives and practical design guidance in one place - giving engineers a faster path from MPN to qualified BOM than paging through separate vendor PDFs.
MAX1229AEEP+T - 12-Bit 300ksps 12-Ch SAR ADC w/ FIFO | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1229AEEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (SAR ADC) with a 6 or 12-channel analog input multiplexer, internal 4.096 V reference, internal temperature sensor, and a 16-entry FIFO, packaged in a 20-pin QSOP. It operates from a single +3.0 V to +3.6 V analog supply and a separate +1.8 V to +3.6 V digital supply and communicates via an SPI/QSPI/MICROWIRE-compatible serial interface running up to 20 MHz. A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm against an internal capacitive DAC to produce a digital code in N conversion cycles for an N-bit result. SAR ADCs combine low power consumption, high accuracy, deterministic latency, and excellent AC performance for multiplexed data-acquisition front-ends. The MAX1229AEEP+T sits in the broader hierarchy of data converters -> ADCs -> successive-approximation ADCs -> multiplexed ADCs with integrated housekeeping (reference, temperature sensor, FIFO), reducing external component count for system designers. Key features include ±1 °C accurate internal temperature sensor (for local cold-junction compensation or system health monitoring), a 16-entry FIFO that decouples conversion bursts from host read latency, a software-configurable analog input mux (6 or 12 channels depending on configuration), and scan-mode operation that sequentially cycles through selected channels at the full 300 ksps aggregate rate. Per the Maxim datasheet, the part achieves 12 bits of effective resolution at 300 ksps with low aperture delay suitable for multiplexed process control and instrumentation. The architecture combines a charge-redistribution DAC with input T/H, an internal precision bandgap reference, and a digital sequencer, allowing the host to program channel sequences and conversion modes once into on-chip registers. This makes the device suited for scanning multiple sensors while offloading housekeeping tasks to the part itself. Typical applications include industrial process-control analog input modules, multichannel data-acquisition systems with embedded temperature sensing, medical patient monitoring front-ends, factory-automation sensor hubs, and HVAC building automation. Designers choose it when they need 12-bit resolution at moderate speeds without the noise and EMI penalty of a delta-sigma modulator, while keeping a small SPI-controlled footprint. When designing with this device, place supply-decoupling ceramic capacitors as close as possible to AVDD and DVDD pins, route AGND and DGND with separate pours joined at a single star under the chip, and avoid digital switching traces near the analog inputs to preserve 12-bit noise performance. This page synthesizes distributor pricing, drop-in alternatives from the MAX1227/MAX1231 pin-compatible family, and practical design notes not found in the manufacturer datasheet alone.
MAX122ACAG - 12-Bit 333ksps SAR ADC, 24-SSOP | Maxim Integrated
The Analog Devices / Maxim Integrated MAX122ACAG is a 12-bit, 333 ksps (kilosamples per second) successive-approximation analog-to-digital converter (SAR ADC) housed in a 24-pin SSOP (Shrink Small Outline Package). The part integrates a track-and-hold amplifier, a low-drift internal voltage reference, and parallel digital outputs in a single BiCMOS die, targeting precision data-acquisition front-ends. Its single 5V analog supply operation simplifies power-tree design compared to bipolar-input ADCs that require separate +5V and -5V rails. A SAR ADC is a type of ADC that performs a binary-search conversion cycle against an internal capacitive DAC, yielding deterministic latency (one conversion clock per N bits) and zero pipeline delay. SAR converters sit in the broader hierarchy of analog-to-digital converters, which includes flash, pipeline, delta-sigma, and dual-slope architectures. SAR parts are favored when the application needs a single-shot, low-latency snapshot of an analog waveform rather than the high oversampling of a sigma-delta or the wide bandwidth of a flash ADC. The MAX122 family, in particular, balances speed, accuracy, and integration for instrumentation, control loops, and DSP front-ends. Key specifications include 12-bit resolution, a 333 ksps sampling rate, an internal track/hold with sub-microsecond acquisition, an integrated buried-zener-like reference, and a parallel digital interface. The BiCMOS process allows low analog supply current while supporting TTL/CMOS-compatible parallel logic. Input ranges are typically 0V to +5V unipolar or ±5V bipolar when driven through appropriate signal conditioning, and the parallel output format simplifies connection to standard digital ASICs or DSPs without a serial-port overhead. The MAX122ACAG is typically used in high-speed data-acquisition cards, industrial control systems, digital signal processing front-ends, multiplexed data-logging systems, and precision instrumentation. The device's 500 ksps internal conversion capability (some family members ship rated at 333 ksps or 500 ksps depending on temperature grade) and the on-chip 2.5V reference make it attractive where board area and component count are constrained. When designing with this ADC, pay close attention to analog input drive amplifiers - a fast-settling op amp is required so the input settles within the acquisition window. Decouple the AVdd pin with both a 10 uF bulk and a 0.1 uF ceramic capacitor placed within 5 mm of the pin to keep reference noise out of the conversion. Use a single-point ground for the AGND pin to avoid digital return currents contaminating the analog ground. This page synthesizes distributor pricing, drop-in alternatives in the same 24-SSOP footprint, and practical design notes not found in a single manufacturer datasheet.