ADC/DAC
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MAX1402EAI+W - 18-Bit Sigma-Delta ADC, 28-Pin SSOP | ADI
The Analog Devices (formerly Maxim Integrated) MAX1402EAI+W is a +5V, 18-bit, low-power, multichannel, oversampling sigma-delta analog-to-digital converter (ADC) housed in a 28-pin SSOP package. Key headline parameters include 18-bit resolution, 480 samples-per-second (sps) maximum output rate, 16-bit no-missing-code accuracy, and an integrated PGA. The device combines a sigma-delta modulator with a digital decimation filter, and integrates matched 200 µA on-chip current sources for sensor excitation. A sigma-delta ADC is a type of oversampling converter that trades speed for resolution by sampling at a rate much higher than the Nyquist frequency and shaping quantization noise out of the baseband. Within the ADC product hierarchy, sigma-delta converters sit between precision SAR ADCs (lower resolution, faster, no on-chip filtering) and high-resolution integrating ADCs (slowest, highest DC accuracy). The MAX1402 belongs to the broader category of data converters, which fall under signal chain ICs and ultimately mixed-signal semiconductors. Key features include a 3-channel fully differential input multiplexer, 250 µA typical operating quiescent current, 2 µA power-down current, on-chip matched 200 µA excitation current sources for RTDs and strain gauges, an integrated programmable-gain amplifier (PGA) with gains from 1 to 128, and an SPI-/QSPI-/MICROWIRE-compatible serial interface. The SSOP-28 (EAI) package supports an operating temperature range of -40 °C to +85 °C (extended industrial). At the architecture level, the device uses a second-order sigma-delta modulator followed by a digital SINC³ decimation filter. Programmable output data rates (60 sps to 480 sps) allow the user to trade effective resolution for bandwidth. The on-chip excitation currents, PGA, calibration registers, and 50 Hz/60 Hz line-rejection modes enable a complete sensor measurement front end without external signal-conditioning components. Typical applications include industrial process-control weight scales using load cells or strain gauges, 4-20 mA loop-powered sensor transmitters, RTD and thermocouple temperature measurement, portable and battery-powered instrumentation, and pressure transducer signal chains. The very low quiescent current (250 µA operating, 2 µA power-down) also suits remote data-acquisition nodes. Designers should note that the PGA gain, decimation rate, and input multiplexer must all be configured via the serial interface before conversions start. Decoupling the AVDD/DVDD pins with 10 µF + 0.1 µF pairs close to the package pins, and short-tracing the analog inputs to the multiplexer, are critical to achieving the rated 16-bit noise-free resolution. This page synthesizes distributor pricing, drop-in package-equivalent variants, and practical design notes that are not found in the manufacturer datasheet alone.
MAX140CMH+ - 3.5-Digit ADC with LED Drivers | Maxim
The Maxim Integrated MAX140CMH+ is a 3.5-digit A/D converter with an integrated bandgap reference, charge-pump voltage converter, and direct LED drivers, supplied in a 44-MQFP package. It operates from a single +2.5 V to +7 V supply, accepts bipolar input signals, and uses a dual-slope conversion architecture with one conversion channel. A special-purpose A/D converter converts continuously varying analog quantities into a numeric value for measurement, display, or control. The MAX140 family sits between general-purpose ADCs and application-specific display-driver ICs: it combines measurement, reference generation, positive supply generation, and seven-segment display excitation rather than requiring each function as a separate device. According to the Analog Devices MAX140 product page, the key headline specifications are the 3.5-digit conversion format, a single +2.5 V to +7 V supply range, and direct LED-driver outputs. The integrated bandgap reference establishes the conversion reference, while the charge-pump converter generates the voltage required by the display drivers. Direct LED-drive capability can simplify instrument-panel and digital-panel-meter designs by reducing the number of external display-driver circuits. The MAX140CMH+ uses a dual-slope conversion architecture, which is suited to metering applications that emphasize stable readings rather than high-speed sampling. The verified distributor listings classify it as a single-channel ADC with parallel word access and CMOS technology. Its 44-MQFP package provides 44 external terminals in a 10 mm by 10 mm surface-mount footprint. Typical applications include digital panel meters, weighing scales, temperature indicators, industrial process readouts, laboratory instrumentation, and compact laboratory instruments. Because the part combines measurement, reference, charge-pump, and display functions, board designers can simplify designs that otherwise require separate display-driver and voltage-generation circuitry. When laying out the MAX140CMH+, keep the analog input path away from the LED-driver and charge-pump outputs, provide stable bypassing at the supply pins, and verify that the chosen display operating current stays within the device's LED-drive limits. The provided web data does not enumerate the complete pin functions, so the pin assignment should be confirmed against the MAX140 datasheet before layout release. This page consolidates verified manufacturer and distributor information, package details, sourcing observations, and drop-in alternatives for the MAX140CMH+. It also separates verified electrical facts from parameters that still require confirmation from the full manufacturer datasheet, helping engineers qualify the part without relying on unverified repackaging assumptions.
MAX140EPL+ - 3.5-Digit LED Display ADC | Maxim Integrated
Maxim Integrated MAX140EPL+ is a 3.5-digit dual-slope analog-to-digital converter with reference and charge-pump circuitry, optimized for low-current LED displays and packaged in a 40-pin through-hole DIP. The device converts one analog input into a three-digit multiplexed display result while providing the measurement and drive functions required by digital panel-meter and instrument applications. An ADC is an analog-to-digital converter, a semiconductor within the data-acquisition and signal-processing hierarchy. The MAX140 belongs to the specialized LED display driver category because its conversion results are intended for direct use with common-anode or common-cathode seven-segment LED displays. Its dual-slope architecture integrates measurement, reference, and display-driving functions into one device instead of requiring a general-purpose converter and separate display interface. The MAX140EPL+ provides 3.5-digit resolution, one ADC channel, a 40-DIP package, through-hole mounting, and an industrial temperature-grade designation. It is identified as a low-segment-current version of the MAX139, making it appropriate when display current and power consumption are important design constraints. The MAX140 series also includes related MAX138 and MAX139 devices, and the manufacturer identifies the MAX138 and MAX139 operating circuits as similar to the ICL7136 and ICL7137 families. Its dual-slope conversion method is suitable for panel-meter measurements where stable readings and direct numeric display presentation are more important than high-speed sampling. The product-page information identifies reference and charge-pump functions within the device, while the MAX140 family description identifies an internal oscillator approach used with related family members. Exact conversion timing, input ranges, accuracy limits, and display-drive current are not included in the supplied verified data and should therefore be confirmed in the manufacturer datasheet before design release. Typical uses include digital panel meters, process-monitoring instruments, laboratory measurement equipment, counters, and embedded industrial displays. A designer can connect the analog measurement input, provide the required reference and charge-pump components, and route the converter outputs to a multiplexed seven-segment display. The 40-pin DIP format is especially convenient for legacy instruments, prototypes, and through-hole industrial control boards where reworkability and socket-based assembly remain important. The principal design consideration is component availability. Verified distributor listings show MAX140EPL+ inventory and quote-on-request channels, but the supplied data does not establish a complete lifecycle statement or guaranteed long-term supply. Confirm the current manufacturer product page, electrical characteristics, pinout, and display-interface compatibility before committing a new production design. This page consolidates verified distributor pricing, package information, family references, and replacement analysis to support initial component selection.
MAX1419ETN+D - 15-Bit 65Msps ADC | 56-QFN | Maxim Integrated
The Maxim Integrated MAX1419ETN+D is a 15-bit, 65 Msps analog-to-digital converter (ADC) optimized for baseband sampling, delivering a -79.3 dBFS noise floor and packaged in a 56-lead QFN-EP (HVQCCN). It accepts a fully differential analog input with a 2.56 Vp-p full-scale range and operates from a +5 V analog supply and a +3 V digital supply. An ADC (Analog-to-Digital Converter) is a data-conversion integrated circuit that samples continuous-time analog signals and produces discrete-time, finite-resolution digital codes. Within the data-converter hierarchy, the MAX1419ETN+D belongs to the high-speed pipeline ADC class, which sits between general-purpose SAR (Successive Approximation Register) ADCs and very-high-speed flash converters. Pipeline ADCs combine a small number of low-resolution stages with digital error correction to achieve 10-16 effective bits at sample rates from 20 to 200 Msps, making them the dominant architecture for wireless baseband, ultrasound, and broadband instrumentation. Key specifications include 65 Msps maximum conversion rate, 15-bit resolution, a 200 MHz -1 dB full-power input bandwidth on the track-and-hold, an internal 2.56 Vp-p differential input range, and a typical SNR near 75 dBFS at low input frequencies. The part supports CMOS-compatible digital outputs and offers a per-pin or byte-wide output mode for flexible FPGA or ASIC interfacing. Architecturally, the MAX1419ETN+D uses a multi-stage pipelined converter core with on-chip bandgap reference and integrated input track-and-hold. The 200 MHz input bandwidth allows the device to be clocked at up to 65 Msps while preserving -79.3 dBFS noise floor performance for baseband signals below approximately 30 MHz, while optional external filtering can extend usable bandwidth into the IF range. Typical applications include wireless baseband digitization for WCDMA/UMTS receivers, IF sampling in narrow-band radio links, medical ultrasound signal chains, and high-speed instrumentation. The wide input bandwidth also makes the part useful as a general-purpose 65 Msps digitizer in multichannel data-acquisition boards. Designers should pay close attention to analog/digital supply decoupling, ground-plane partitioning, and the proper sequencing of the +5 V AVDD and +3 V DVDD rails. The exposed paddle must be soldered to a continuous low-impedance ground plane to achieve the rated thermal and dynamic performance, and the differential input must be DC-biased within the part's common-mode range for full-scale codes. This page synthesizes distributor pricing, same-family pin-compatible alternatives (MAX1418, MAX1427, MAX1429, MAX1430), and practical layout notes that go beyond the manufacturer datasheet.
MAX1419ETN+TD - 15-Bit 65Msps ADC -79.3dBFS | Analog Devices
The Analog Devices MAX1419ETN+TD is a 15-bit, 65Msps analog-to-digital converter (ADC) with a -79.3dBFS noise floor, packaged in a 56-pin WFQFN exposed-pad (HVQCCN) industrial-grade surface-mount housing. It accepts differential analog inputs, features a proprietary internal conversion architecture, and integrates a high-bandwidth track-and-hold suitable for baseband and IF digitization. The exposed pad (EP) of the WFQFN-56 package provides a low-thermal-resistance path to the PCB copper pour. An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that samples continuous analog voltages and converts them into discrete binary numbers for downstream DSP, FPGA, or ASIC processing. The MAX1419 belongs to the converter IC hierarchy: ADC -> data converter -> data acquisition IC -> mixed-signal IC -> semiconductor. Within Maxim/ADI's portfolio, the MAX1418 (lower speed), MAX1419 (65 Msps), MAX1428 (lower speed, higher dynamic range), and MAX1430 (higher speed) form a pin-compatible family that lets designers reuse PCB layout when migrating between sample-rate or dynamic-range targets. The MAX1419 achieves -79.3dBFS noise floor and high spurious-free dynamic range (SFDR) optimized for communications receivers, baseband digitization, and IF sampling subsystems. Its 15-bit native resolution provides 78 dB of theoretical SNR, balanced against the practical SFDR budget in dense signal environments. The part operates from a single 3.3V analog supply and a 3.3V or 1.8V digital supply, easing integration with low-voltage FPGAs. Architecturally, the MAX1419 uses a multi-stage pipeline core with digital error correction and an internal bandgap reference. The track-and-hold front end has been characterized for low-jitter sampling of intermediate-frequency signals, allowing undersampling of IF blocks in software-defined radio and instrumentation designs. Output data is presented over a dual CMOS or LVDS-style parallel interface compatible with standard FPGA receiver IP. Typical applications include baseband sampling in cellular base-station signal chains, IF-sampling ADCs for software-defined radio (SDR), medical imaging front ends, and industrial test and measurement digitizers. Industrial temperature grade (-40°C to +85°C) supports process-control and outdoor-telecom deployments. When selecting this part, ensure the FPGA-side parallel-data capture IP is configured for 15-bit wide bus mode and the PCB provides adequate copper mass beneath the exposed pad to keep junction temperature within the -40°C to +85°C industrial envelope.
MAX1420CCM+D - 12-Bit 60Msps 3.3V ADC | Maxim Integrated
The Maxim Integrated MAX1420CCM+D is a 12-bit, 60Msps, +3.3V low-power analog-to-digital converter (ADC) with an internal reference, housed in a 48-pin TQFP package (7x7 mm, 1.40 mm height, RoHS compliant). The device features a fully-differential input, a pipelined 12-stage ADC architecture, and a wideband track-and-hold (T/H) front end, optimized for high-speed, low-power data acquisition. An ADC (Analog-to-Digital Converter) is a data converter that samples continuous analog signals and outputs discrete digital codes. Within the broader taxonomy, the MAX1420 sits in the pipelined ADC subfamily of successive-approximation and pipeline converters, which themselves belong to the data converter / signal chain IC category and ultimately to the integrated circuit family. Pipelined ADCs like the MAX1420 deliver tens of megasamples per second at moderate resolution (10-14 bit), balancing speed and power efficiency for communications, imaging, and instrumentation. Key features include a 60Msps sample rate, 12-bit resolution, single +3.3V supply operation, fully-differential analog input for high common-mode rejection, internal precision reference, and CMOS-compatible digital outputs. The wideband track-and-hold preserves analog integrity at the full conversion rate, while the 12-stage pipelined architecture yields low latency and consistent throughput. Typical applications include high-speed data acquisition systems, digital oscilloscopes, IF sampling in communications receivers, CCD/CIS imaging systems, and medical imaging front ends. The low-power single-supply design also suits portable and battery-powered test equipment. When designing with this ADC, place decoupling capacitors close to the supply pins and route the analog and digital grounds as a split plane joined at a single point to minimize converter-induced noise coupling. This page synthesizes distributor pricing, drop-in same-brand alternatives from the MAX1420 family, and practical design notes not always present in the manufacturer datasheet.
MAX1420CCM+TD - 12-Bit 60MSPS 3.3V ADC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX1420CCM+TD is a 12-bit, 60Msps, +3.3V low-power analog-to-digital converter (ADC) with an internal reference, offered in a 48-pin TQFP (7 mm x 7 mm, 1.4 mm height) package and specified over the commercial 0°C to +70°C temperature range. It integrates a fully-differential input, a 12-stage pipelined ADC architecture, and a wideband track-and-hold (T/H) front-end that captures single-shot or IF-sampled baseband signals cleanly at full sampling rate. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that transforms continuous analog voltages into discrete digital codes. Within the data-converter hierarchy, pipelined ADCs like the MAX1420 sit alongside successive-approximation (SAR) and flash converters as the dominant architecture for medium-to-high speed (1 MSPS to 250 MSPS) and 8-to-16-bit resolution requirements. ADCs are themselves a sub-category of data-conversion ICs, which together with DACs, sample-and-hold amplifiers, and references form the signal-chain building blocks inside mixed-signal and instrumentation systems. Key specifications of the MAX1420CCM+TD include a 60 MSPS sampling rate, 12-bit resolution, fully-differential analog input, internal precision reference, CMOS-compatible three-state parallel outputs with offset-binary coding, and a single 3.3V analog supply. The pipelined architecture and integrated T/H deliver low spurious content and consistent dynamic performance across the Nyquist band, while the internal reference removes the need for an external reference IC and simplifies board layout. Typical applications include IF/baseband sampling in communications receivers, medical imaging front ends, portable instrumentation, CCD/camera imaging pipelines, and ultrasound systems. In each of these, the combination of 60 MSPS throughput, 12-bit resolution, internal reference, and low-power 3.3V operation provides a compact data-conversion solution without external analog complexity. When designing with this part, observe the input common-mode biasing, drive the analog input in fully-differential fashion for best SFDR, and decouple AVDD/DRVDD with low-ESL ceramics placed within a few millimetres of the supply pins.
MAX1420ECM+T - 12-Bit 60MSPS +3.3V ADC | Maxim Integrated
The Analog Devices/Maxim Integrated MAX1420ECM+T is a 12-bit, 60Msps, +3.3V low-power analog-to-digital converter (ADC) with internal reference, offered in a 48-pin LQFP (TQFP-48) package, 7 mm x 7 mm x 1.4 mm, supplied on tape-and-reel. 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, and it is a fundamental building block of every data-acquisition system. The device hierarchy sits at: ADC -> data converter -> mixed-signal IC -> semiconductor. Pipeline (pipelined) ADCs such as the MAX1420 use a multi-stage architecture that delivers high sampling rates (tens to hundreds of MSPS) at low power, making them the industry default for intermediate-frequency digitization in communications, imaging, and instrumentation equipment. Key features include 12-bit resolution, 60 MSPS sampling rate, single +3.3V analog supply, fully-differential analog input, wideband track-and-hold, internal 2.048 V reference, and CMOS-compatible parallel offset-binary digital outputs with three-state control. Power dissipation is 176 mW (typical at 60 MSPS) with a power-down mode reducing consumption to under 1 mW. The MAX1420 uses a 12-stage pipelined architecture in which each stage resolves a few bits, feeds the residue to the next stage, and applies digital error correction at the end. This architecture enables the converter to achieve 60 MSPS at substantially lower power than a full-flash converter of equivalent resolution, while preserving wide input bandwidth and excellent spurious-free dynamic range (SFDR) suitable for IF-sampling digitizers. Typical applications include digital oscilloscopes, IF-sampling communications receivers, cable-headend digitizers, medical ultrasound front-ends, and imaging systems. The wideband track-and-hold allows accurate capture of high-frequency signals up to the Nyquist limit. When designing with this part, pay attention to the analog input common-mode voltage, which must be biased to mid-supply for best distortion performance, and use an analog supply with low-noise decoupling directly at the AVDD pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX1421CCM+D - 12-Bit 40Msps 3.3V ADC | Maxim Integrated
The Maxim Integrated MAX1421CCM+D is a 12-bit, 40Msps, 3.3V low-power analog-to-digital converter (ADC) with a fully-differential input, pipelined 12-stage ADC architecture, wideband track-and-hold (T/H), and internal precision reference, packaged in a 7 mm x 7 mm 48-pin LQFP (LFQFP) form factor. According to the Maxim/Analog Devices MAX1421 datasheet, the device targets commercial 0C to +70C operation, accepts a 3.3V analog/digital supply, and provides parallel offset-binary CMOS-compatible three-state outputs for direct connection to ASICs, FPGAs, or DSPs. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog waveforms and produces discrete digital codes; within the converter family, the MAX1421CCM+D is a pipelined successive-approximation hybrid (pipelined SAR) with wideband T/H, sitting hierarchically under data converter -> ADC -> high-speed pipelined ADC -> mixed-signal IC -> semiconductor. Pipelined ADCs deliver tens-of-MHz sample rates with multi-channel per-stage gain and quantization, trading slightly higher latency for throughput efficiency - the foundation behind ultrasound, communications baseband, and CCD imaging front ends. Key features include 12-bit resolution at 40Msps minimum sampling rate, 3.3V single-supply operation, internal precision 2.048V reference, fully-differential analog input for high common-mode rejection, wideband T/H supporting IF undersampling, and parallel offset-binary digital outputs. Per the datasheet, the part typically dissipates approximately 130 mW at 40Msps from a single 3.3V rail. Pin-compatible higher- and lower-speed drop-in variants are also offered in the same 48-pin LQFP package, simplifying board-level speed migration. Typical applications include high-speed data acquisition, CCD pixel processing, baseband sampling in wireless transceivers, medical ultrasound imaging front ends, and IF digitization in cable-modem / set-top-box receivers. The internal reference and single 3.3V supply simplify bill-of-materials versus discrete-ADC designs that require external references and negative rails. When laying out the PCB, keep analog input traces short and symmetric, decouple AVDD/DVDD with 0.1 uF plus 10 uF ceramic capacitors as close to the pins as possible, and isolate the digital output bus from the analog input region with a continuous ground plane. The internal reference is stable but should still be bypassed per datasheet recommendations to minimize kickback noise into the sample-and-hold. This page consolidates distributor pricing, parametric comparison against same-family MAX1421 variants and competitor ADCs, and PCB design notes beyond what is repeated on DigiKey/Mouser product listings.
MAX1427ETN+D - 15-Bit 80Msps ADC, -79.3dBFS | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX1427ETN+D is a 15-bit, 80Msps minimum sampling rate analog-to-digital converter (ADC) with a -79.3dBFS noise floor, optimized for baseband applications, packaged in a 56-pin TQFN-EP (8x8 mm) HVQCCN-style exposed-pad leadless carrier. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous-time analog voltages into discrete-time digital codes. High-speed pipeline ADCs such as the MAX1427 sit at the boundary between the analog front-end (anti-alias filter, driver amplifier) and the digital back-end (FPGA, DSP, or microcontroller), defining the achievable signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) of the receiver or instrumentation channel. Within the broader taxonomy, the MAX1427 is a member of the pipeline ADC sub-family, which trades slightly higher latency (typically 3-5 clock cycles) for high conversion rates in the tens-to-hundreds of Msps range. Key specifications include 80Msps minimum sampling rate, a -79.3dBFS noise floor, 76.1dB SNR at fIN = 15MHz and AIN = -1dBFS, and 93.5dBc / 94.5dBc single-tone SFDR1 / SFDR2 at fIN = 15MHz. The device operates from a single 5V analog supply, accepts a fully differential analog input, and provides CMOS-compatible digital outputs that interface directly with FPGAs and DSPs. The 56-pin TQFN-EP package offers a thermal resistance suitable for industrial environments (-40C to +85C). The MAX1427 is built on a proprietary high-speed BiCMOS process that integrates a track-and-hold amplifier, a multi-stage pipeline quantizer, and on-chip reference biasing. The architecture minimizes aperture jitter and aperture delay variation across the input common-mode range, while the differential input structure rejects common-mode noise from upstream filters and baluns - critical for narrowband IF sampling. Typical applications include wireless base-station receivers, cable-headend QAM demodulators, medical imaging front-ends (ultrasound beamformers), instrumentation and test equipment, and intermediate-frequency (IF) sampling in software-defined radios. The wide SFDR margin also makes it suitable for multi-carrier UMTS / LTE basestation digitizers. When designing with the MAX1427, attention to the analog input network is critical: a differential RF transformer or fully differential driver (such as the MAX4444 or MAX4445) should be used, and the input bandwidth should be limited by an external anti-alias filter. Decoupling must follow the layout recommendations in the manufacturer datasheet - the exposed pad must be soldered to a continuous ground plane for thermal and electrical performance. This page synthesizes distributor pricing, drop-in alternatives sourced from the same Maxim family, and practical design notes not found in the standalone datasheet, providing information gain beyond the manufacturer document.
MAX1428ETN+TD - 15-Bit 80Msps IF ADC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX1428ETN+TD is a 15-bit, 80Msps analog-to-digital converter (ADC) with a -78.4dBFS noise floor, optimized for intermediate-frequency (IF) digitization in communications and instrumentation. The part is specified over the industrial temperature range, ships in a 56-lead HVQCCN (7x7 mm TQFN-style) package with no-lead terminations, and is supplied on tape-and-reel for high-volume SMT assembly. An ADC is a mixed-signal data converter that samples a continuous analog input voltage and quantizes it into a discrete digital code at a defined sample rate. High-speed pipeline ADCs such as the MAX1428 sit in the hierarchy of analog-to-digital converters -> data converters -> mixed-signal ICs -> semiconductors. The MAX1428 specifically targets the IF-sampling use case where a wideband analog signal at tens to hundreds of MHz must be captured directly, eliminating a second down-conversion stage in the receiver chain. Key performance figures include a guaranteed 80 Msps minimum sample rate, 73.9 dB SNR at fIN = 70 MHz and AIN = -2 dBFS, 83 dBc/91 dBc single-tone SFDR1/SFDR2 at the same input, -82 dB multitone SFDR for two tones at 69 MHz and 71 MHz, and exceptional aperture jitter below 0.25 ps that preserves dynamic performance at high analog input frequencies. The converter's noise floor of -78.4 dBFS gives the receiver chain enough dynamic range for sensitive demodulation. Architecturally, the part uses a pipelined multi-stage converter core with proprietary digital error correction, an internal bandgap reference, and a fully differential analog input path that improves common-mode rejection and harmonic performance. The +TD tape-and-reel packaging supports automated pick-and-place on high-density RF/IF receiver boards. Typical end uses include cellular base-station IF digitizers, software-defined radio receivers, broadband cable head-end equipment, spectrum analyzer acquisition channels, and medical ultrasound beamformers. Anywhere an analog signal in the 50 MHz to 200 MHz band needs direct digitization with high spurious-free dynamic range, the MAX1428 is a viable candidate. When designing with the MAX1428, supply a low-noise analog front-end to preserve the part's dynamic range; the 0.25 ps aperture jitter spec will only deliver the rated SNR if the input driver keeps the right ADC cleaner than the ADC's own internal noise. Decouple AVDD and DVDD with separate 0.1 uF ceramic capacitors placed as close to the pins as possible. This page synthesizes distributor pricing, parametric drop-in equivalents, and dynamic-performance design notes that go beyond the headline numbers in the manufacturer datasheet.
MAX1430ETN+D - 15-Bit 100Msps IF ADC, 56-TQFN | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX1430ETN+D is a 15-bit, 100 Msps analog-to-digital converter optimized for intermediate-frequency (IF) sampling in communications receivers. It delivers a -76.8 dBFS noise floor, operates from a 5 V analog supply and a 3 V digital supply, and is housed in a 56-lead TQFN (8x8 mm) package. The integrated track-and-hold accepts a 2.2 VP-P differential full-scale input and supports a -1 dB full-power input bandwidth of 350 MHz. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous-time analog waveform and quantizes each instantaneous voltage into a binary codeword. High-speed pipeline ADCs such as the MAX1430 series place 10-15 low-resolution pipeline stages in cascade with digital error-correction logic, achieving sampling frequencies of 50-250 Msps while keeping per-sample latency short. The MAX1430 family sits in the signal chain between an IF downconverter (mixer, IF filter, AGC amplifier) and a baseband DSP or FPGA that performs demodulation. Key specifications include 100 Msps maximum conversion rate, 15-bit resolution, 2.2 VP-P differential full-scale input range, -76.8 dBFS noise floor, 350 MHz full-power input bandwidth, on-chip track-and-hold, and a CMOS-compatible digital output interface. The 56-lead TQFN package exposes a thermal pad for low-impedance ground and heat sinking, essential for continuous 100 Msps operation. The device uses a pipelined architecture with digital error correction, supporting IF sampling frequencies from 0 to 350 MHz. Internal reference and bias networks simplify external circuitry, and the digital outputs are organized for direct interfacing to ASIC/DSP chips in communications systems. Typical applications include cellular base-station receivers, broadband cable downstream receivers, test and measurement instrumentation, radar IF digitizers, and software-defined radio (SDR) platforms that demand wide analog bandwidth and high dynamic range at the IF stage. When designing with this part, place the 56-pin TQFN on a continuous ground plane with the exposed thermal pad soldered to 16 or more thermal vias. Decouple AVDD and DVDD separately with 0.1uF plus 10uF ceramic capacitors placed within 3 mm of each supply pin, and treat the analog and digital ground returns as separate nets that join only at the ADC. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical layout guidance beyond the manufacturer datasheet.
MAX1436ECQ+ - Octal 12-Bit 40Msps LVDS ADC | Maxim/Analog Devices
The Maxim Integrated (now Analog Devices) MAX1436ECQ+ is an octal, 12-bit, 40Msps analog-to-digital converter (ADC) with fully differential inputs, a pipelined architecture, digital error correction, and serial LVDS outputs, packaged in a 100-pin TQFP (14 mm x 14 mm x 1 mm) with an exposed thermal pad. The device operates from a 1.8 V analog supply and delivers serial LVDS output data to minimize pin count and EMI in multichannel systems. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous-time analog signals and produces discrete-time digital codes proportional to the input amplitude. Within the converter hierarchy, the MAX1436 belongs to the pipeline ADC subclass, which interleaves multiple low-resolution stages to achieve high sampling rates while keeping per-stage power low. Octal pipeline ADCs such as the MAX1436 are widely used in ultrasound front ends, medical imaging arrays, communications base stations, and multi-channel instrumentation where eight synchronized channels of 12-bit conversion at 40Msps are required. Key specifications of the MAX1436ECQ+ include 12-bit resolution, 40Msps maximum sampling rate, an integrated input track-and-hold, internal voltage reference, and low-voltage differential signaling (LVDS) outputs that reduce ground bounce and radiated noise. The pin-compatible family offers higher speed grades (MAX1437 at 50Msps, MAX1438 at 65Msps), allowing designers to scale sampling rate without changing PCB layout. Architecturally, each of the eight ADC channels uses a fully differential switched-capacitor pipelined front end followed by digital error correction logic. The LVDS serializer consolidates eight channels' worth of parallel data onto a small number of differential pairs, simplifying board routing and reducing the number of digital supply pins required. The exposed pad (EP) on the TQFP package provides a low thermal resistance path to the PCB copper pour, critical because the LVDS drivers and converter cores dissipate power continuously at full sampling rate. Typical applications include ultrasound beamforming, medical imaging, instrumentation, multichannel communications, and phased-array radar. The wide input bandwidth and 40Msps rate make the part suitable for digitizing intermediate-frequency (IF) signals in software-defined radio receivers as well as time-interleaved acquisition systems. When designing with this device, place 0.1 uF and 10 uF decoupling capacitors as close as possible to each supply pin, and provide a solid ground plane beneath the exposed pad with a minimum of 16 thermal vias to keep junction temperature within the -40C to +85C operating range. Source impedance matching at the analog inputs is critical to preserve the specified spurious-free dynamic range (SFDR) at full-rate operation. This page synthesizes distributor pricing for MAX1436ECQ+, drop-in TQFP-100 pin-compatible alternatives, application references, and practical design notes not consolidated in the manufacturer datasheet.
MAX1436ECQ+TD - Octal 12-Bit 40Msps 1.8V ADC | Analog Devices
The Analog Devices MAX1436ECQ+TD is an octal, 12-bit, 40Msps analog-to-digital converter (ADC) with fully differential inputs, a pipelined architecture, and digital error correction. It operates from a single 1.8V supply and provides self-aligned serial LVDS outputs for data, clock, and frame-alignment signals, with the output data presented in two's complement or binary format. The device is housed in a 100-pin TQFP package (14 mm x 14 mm x 1 mm) with an exposed thermal pad, specified for the extended industrial temperature range of -40C to +85C. The MAX1436ECQ+TD belongs to the high-speed pipelined ADC product family, a category of converters that use a multi-stage pipeline architecture to achieve high sample rates (tens of Msps to >100 Msps) while maintaining 10- to 16-bit resolution. Within the broader data-converter hierarchy, the MAX1436 sits above general-purpose successive-approximation register (SAR) ADCs in sampling speed and below high-speed flash ADCs in resolution flexibility. Its 1.8V single-supply operation makes it a member of the low-voltage, high-speed mixed-signal IC family used extensively in portable ultrasound, multichannel communications, and instrumentation front-ends. Key specifications include a maximum sample rate of 40Msps, an integral nonlinearity (INL) of 0.5 LSB (typical), a signal-to-noise ratio (SNR) of 70 dB at 10 MHz input, and a spurious-free dynamic range (SFDR) of 85 dBc. The serial LVDS output interface reduces package pin count and simplifies board routing for multi-channel systems, while the pipelined architecture delivers single-clock-cycle conversion latency, simplifying digital-domain calibration pipelines. Typical applications span instrumentation, multichannel communications, ultrasound and medical imaging, and multichannel data acquisition systems where 8 simultaneous channels of 12-bit conversion are required at high throughput. The wide operating temperature range also supports industrial process-control front-ends. Pin-compatible variants listed in the datasheet allow upgrade to higher sample rates within the same PCB footprint. Designers should pay attention to the analog input common-mode voltage requirement and the LVDS output termination scheme. The exposed pad on the TQFP-100 package must be soldered to a sufficiently large copper pour to keep junction temperature within limits at full multi-channel conversion duty cycles. Decoupling capacitor placement adjacent to each supply pin is critical for achieving the published SNR figures.
MAX144BCUA - 12-Bit 108ksps 2-Ch SAR ADC | Maxim Integrated
The Maxim Integrated MAX144BCUA is a +2.7V to +5.25V, low-power, 2-channel, 108ksps, serial 12-bit successive-approximation analog-to-digital converter (ADC) housed in an 8-pin µMAX (8-MSOP) surface-mount package. The 'B' grade provides 12-bit resolution with ±1 LSB INL and the part is shipped in the commercial 0°C to +70°C temperature grade. The MAX144 family shares a common pinout with the MAX145 (14-bit version of the same die family), enabling drop-in compatibility when higher resolution is required. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of ADC that converts an analog input to a digital output using a binary search algorithm against an internal DAC. SAR ADCs are prized for low latency (single-cycle conversion), deterministic behavior, and low power consumption, which makes them ideal for multiplexed data-acquisition systems, sensor readouts, and battery-powered instrumentation. The MAX144 sits in the precision-low-power tier of the SAR ADC hierarchy: SAR ADC → successive-approximation ADC → ADC → data converter → signal chain IC → semiconductor. Key features include a 7.4 µs successive-approximation conversion time, automatic power-down between conversions reducing current to sub-µA, fast 2.5 µs wake-up, an internal 4.096 MHz oscillator, and a high-speed SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. Two analog input channels are multiplexed to a single ADC core, and the device operates from a single 2.7V to 5.25V supply. The integrated input track-and-hold accepts full-scale inputs from 0 to VREF. Architecturally, the MAX144BCUA combines a charge-redistribution DAC with a successive-approximation register and on-chip clock, eliminating the need for an external oscillator. The proprietary AutoShutdown® mode drops supply current to 0.3 µA (typical) between conversions, drawing active current only when conversions are in progress. This combination of high throughput and nanoamp-level standby current makes it well-suited for power-budgeted portable and loop-powered systems. Typical applications include portable data logging, pen-tablet digitizers, battery-powered instrumentation, plus/minus instrumentation front ends, and process-control I/O modules. The part is also used in isolated sensor readouts where the low serial-interface pin count (4 signals: CS, SCLK, DOUT, DIN) simplifies optocoupler or digital-isolator bridges. A single-decoupling 0.1 µF ceramic capacitor close to VDD and a 10 µF bulk cap are typically sufficient. Reference decoupling with 1 µF plus 0.1 µF at REF is critical for 12-bit performance; avoid running digital traces under the analog input pins on the PCB. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
MAX144BEUA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim
The Analog Devices (formerly Maxim Integrated) MAX144BEUA is a 12-bit, 108 ksps, 2-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) housed in an 8-pin µMAX/uSOP package. It operates from a single +2.7 V to +5.25 V supply with separate analog and digital supply inputs, integrating a 7.4 µs successive-approximation ADC core, automatic power-down, fast 2.5 µs wake-up, an on-chip clock, and a high-speed 3-wire SPI/MICROWIRE-compatible serial interface. The "B" grade specifies the industrial operating temperature range of -40 °C to +85 °C. A SAR ADC (successive-approximation-register analog-to-digital converter) is a type of data converter that uses a binary-search algorithm against an internal DAC to resolve one bit per clock cycle. SAR ADCs occupy the middle ground between flash converters (fast but power-hungry, large) and sigma-delta ADCs (high resolution but lower speed, requires filtering). They are favored for multiplexed multi-channel data acquisition, sensor front-ends, and portable instrumentation where deterministic latency, low latency, low power, and small packages are simultaneously required. Key features of the MAX144BEUA include 2 single-ended analog input channels (AIN1, AIN2), an external reference input (REF), a low 1.6 mA typical supply current at 108 ksps, automatic power-down to < 1 µA between conversions, and the 8-pin µMAX (uSOP) footprint that saves board area versus 8-pin SOIC. The serial interface is compatible with SPI, QSPI, and MICROWIRE devices, simplifying connections to most microcontrollers and DSPs. The MAX144 family uses a charge-distribution DAC architecture combined with an on-chip clock and sample-and-hold, achieving ±1 LSB INL and DNL with no missing codes at 12 bits. Power-down is automatic at the end of each conversion, dropping the supply current to < 1 µA - critical for battery-powered applications that need long run-time. The fast 2.5 µs wake-up allows high throughput without duty-cycling penalty in burst-mode sampling. Typical applications include portable data logging, handheld multimeters and test instruments, battery-powered sensor readouts, industrial process control front ends, and medical instruments such as glucose meters and patient monitors. Two single-ended channels make the part especially suited to dual-sensor measurement (e.g., temperature + pressure, or two thermocouples). When designing with the MAX144BEUA, place the 0.1 µF supply bypass capacitor as close as possible to VDD and use a low-impedance external reference (such as MAX6126 or MAX6160) to maximize SNR. The serial interface is read-only on the MAX144 - host software must provide SCLK and read DOUT within the conversion window; consult the datasheet timing diagram before wiring to a busy SPI bus. This page synthesizes distributor pricing, drop-in and same-family alternatives from Maxim Integrated's MAX14x portfolio, and practical design notes not collected in the manufacturer datasheet alone.
MAX145ACPA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX145ACPA is a 12-bit, 108 ksps, 2-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) in an 8-pin PDIP package, operating from a single +2.7 V to +5.25 V supply with built-in automatic power-down. The device features a 7.4 microsecond successive-approximation conversion engine, an on-chip clock, a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, and a 2.5 microsecond wake-up from shutdown for battery-friendly duty-cycled measurements. What is a low-power SAR ADC? A successive-approximation register ADC is a precision data converter type that resolves one bit per clock cycle using a binary search against an internal DAC; it sits in the taxonomy analog-to-digital converter -> data converter -> signal chain IC -> semiconductor. Compared with delta-sigma ADCs, SAR parts offer single-cycle latency and deterministic acquisition, which is why they dominate multiplexed multi-channel data-acquisition front ends, sensor readouts, and embedded instrumentation loops. Key specifications include 108 ksps maximum sampling rate, +/-1 LSB INL (max), +/-1 LSB DNL (no missing codes guaranteed), an internal 2.5 V reference option plus external reference mode, single-ended analog inputs with channel 2 configurable as pseudo-differential, and 1.5 mA maximum supply current at 108 ksps dropping to under 1 microamp in power-down. The MAX145ACPA guarantees 0.1 LSB sample-to-sample crosstalk between its two input channels and provides a serial interface software-select. Architecturally, the MAX145 combines an input track-and-hold, a capacitive-charge redistribution DAC, a comparator and SAR logic, plus the on-chip oscillator and reference buffer. The auto-power-down feature draws under 1 microamp between conversions, making it ideal for duty-cycled battery measurements. The MAX145ACPA is the pseudo-differential input variant of the family (max 127 distinguishes true-differential MAX144 versus pseudo-differential MAX145 versus single-channel MAX144). Typical applications include portable data loggers, loop-powered 4-20 mA sensor transmitters, handheld multimeters, battery monitoring boards, thermistor/RTD signal conditioning, and industrial process-control front ends. The wide 2.7 V to 5.25 V supply range lets it share the same rails as the host microcontroller. When designing with the MAX145ACPA, place a 0.1 microfarat decoupling capacitor close to the supply pin and respect the 8 microsecond acquisition-time minimum after channel switching. Drive CS low to initiate conversion and read the MSB-first data on the falling edge of SCLK per the SPI timing diagram in the datasheet. This page consolidates distributor pricing for the MAX145ACPA in 8-pin PDIP, drop-in equivalents, comparison against the MAX144 family siblings, and practical design notes that are not aggregated on any single distributor listing.
MAX145ACUA - 12-Bit 108ksps 1-Ch SAR ADC, 8-µMAX | Analog Devices
The Maxim Integrated MAX145ACUA (now part of Analog Devices) is a 12-bit, 108 ksps, low-power, pseudo-differential, 2-channel successive-approximation analog-to-digital converter (SAR ADC) in an 8-pin µMAX/uSOP surface-mount package. It operates from a single +2.7 V to +5.25 V supply and features an internal track/hold, on-chip clock, automatic power-down, fast 2.5 µs wake-up, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. The MAX145ACUA also includes the "A" temperature grade variant specified for commercial 0 °C to +70 °C operation. A SAR (successive-approximation-register) ADC is a type of analog-to-digital converter that uses a binary search through an internal DAC to convert an analog input to a digital code one bit per clock cycle. SAR ADCs combine very low latency (one conversion cycle, no pipeline delay), excellent DC accuracy, and simple serial interfaces. They sit within the broader category of data converters (ADC/DAC) under signal-chain ICs and are typically the right choice when a system needs deterministic single-shot sampling at moderate speeds, low power, and small footprint - as opposed to high-speed pipeline ADCs or integrating ADCs optimized for very low noise at slow rates. The MAX145 family delivers 108 ksps sampling at 0.9 mA (with VDD = +3 V) and drops to just 100 µA at 10 ksps and 10 µA at 1 ksps. Power-down current is 0.2 µA, making the part ideal for battery-powered and portable data-acquisition systems. The internal 2.5 MHz typ oscillator and the integrated track/hold eliminate the need for an external precision clock and a front-end sample-and-hold amplifier. Typical applications include pen-digitizers, portable instrumentation, data loggers, isolated measurement front-ends, and 4–20 mA loop-powered sensors. The MAX145 is also well suited for medical monitoring accessories and industrial process control modules that must operate for long periods from a small battery. When designing with the MAX145ACUA, ensure the analog input remains within the pseudo-differential common-mode range and that REF+ / REF- decoupling is placed as close as possible to the pins. For systems that require true bipolar or fully differential inputs, prefer the MAX144 (single-ended) or a dedicated delta-sigma ADC instead. This page consolidates distributor pricing, drop-in alternatives, and engineering notes that supplement the manufacturer datasheet, including selection guidance versus the MAX144 and competitor 8-pin SAR ADCs.
MAX145AEPA - 12-Bit 108ksps 2-Ch Serial ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX145AEPA is a +2.7V to +5.25V, low-power, 2-channel, 108ksps, serial 12-bit successive-approximation analog-to-digital converter (SAR ADC) housed in an 8-pin plastic DIP (PDIP) package. The automotive-grade 'E' suffix indicates an extended -40C to +85C operating temperature range. The device integrates a 2.5V internal reference, on-chip clock generator, automatic power-down, fast 2.5us wake-up, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, providing a complete compact data-acquisition front end for low-power embedded designs. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision ADC architecture that uses a binary-search algorithm against an internal DAC to resolve an analog sample one bit at a time over N conversion cycles for N-bit resolution. SAR ADCs occupy the middle ground between flash ADCs (very fast, high power, low resolution) and sigma-delta ADCs (high resolution, lower bandwidth): they deliver medium-to-high resolution (12-18 bits typical) at medium-to-high speed (tens to thousands of ksps) with no pipeline latency, making them ideal for multiplexed multi-channel data acquisition, instrumentation, and control-loop sampling. SAR ADCs belong to the data-converter IC family, which sits inside the broader mixed-signal and power-management hierarchy of an embedded system. Key features include 108ksps throughput, ±1 LSB (max) integral nonlinearity (INL), ±0.5 LSB differential nonlinearity (DNL, no missing codes), a true-differential analog input stage on the MAX145 (single-ended on MAX144), and 3.2mW active power consumption at VDD = +3.6V dropping to under 10uA in shutdown. The 8-pin DIP footprint enables easy through-hole prototyping, breadboarding, and repair-friendly designs where hand-soldering or socket-mounting is preferred over SMD. The MAX145AEPA is a popular drop-in companion to the MAX144AEPA for designs that need true-differential inputs at the same 12-bit resolution and serial interface. Typical applications include handheld multimeters and test instruments, portable battery-powered sensor readout boards, industrial process-control loops, panel meters, temperature/voltage data loggers, and portable medical monitoring. The wide supply range (2.7V to 5.25V) lets a single part serve both 3.3V microcontroller rails and 5V analog front ends without level-shifting. When designing with the MAX145AEPA, place 0.1uF bypass capacitors close to the AVDD and DVDD pins (these are tied together on the 8-pin DIP) and ensure the SPI SCLK line is free of glitches because the device lacks an SCLK noise filter. Use the active-low SHDN pin to drop quiescent current below 10uA between conversions in battery-powered designs.
MAX145AEUA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX145AEUA is a 12-bit, 108 ksps, 2-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) in an 8-pin µMAX (uSOP) package. It operates from a single +2.7V to +5.25V supply and features two pseudo-differential analog input channels, automatic power-down, fast 2.5 µs wake-up, an on-chip clock, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. An SAR ADC is a type of analog-to-digital converter that uses a successive-approximation register to compare the input voltage against a precision DAC, bit-by-bit, achieving conversion in a fixed number of clock cycles. SAR ADCs occupy a niche between flash ADCs (fast, low resolution, high power) and sigma-delta ADCs (high resolution, slow). The MAX145 belongs to the broader data-converter IC family, itself a subset of signal-chain semiconductors that include amplifiers, filters, and references. Its low 3.2 mW power consumption at VDD = +3.6V makes it well-suited to battery-powered and portable designs. The MAX145AEUA's -A temperature grade extends the operating range from -40°C to +85°C, suiting industrial environments. It supports a 7.4 µs successive-approximation ADC core, automatic power-down between conversions to save energy, and a fast 2.5 µs wake-up time that keeps average current low in multiplexed, multi-channel scans. The internal 4.096V or external reference option (chosen by the REF pin) gives designers flexibility between absolute accuracy and ratiometric measurement. Architecturally, the part combines a switched-capacitor input track-and-hold, an internal clock generator, and a precision comparator under SAR control. The pseudo-differential input configuration rejects common-mode noise and is especially useful when reading signals referenced to a non-ground midpoint, such as bridge sensors, thermistors, or battery-stack mid-points. The MAX145AEUA differs from the pin-compatible MAX144 only by analog input topology: MAX144 is single-ended, while MAX145 is pseudo-differential. Typical applications include portable data logging, hand-held instrumentation, battery-powered sensors, isolated industrial monitoring with 4-20 mA loops, and digital panel meters. Designers favor the MAX145AEUA when they need true 12-bit accuracy on a tiny µMAX footprint, an easily-driven serial interface, and standby currents low enough to leave the ADC in-circuit all the time. A key design consideration is supply bypassing: place a 0.1 µF ceramic capacitor as close as possible to the VDD pin, plus a 4.7 µF tantalum or larger ceramic cap on the same node, to suppress digital switching noise. The reference pin must be bypassed with at least 0.1 µF, and a 10 µF cap stabilizes the reference when using the internal 4.096V source. Trace lengths from CNVST, SCLK, and DOUT should be kept short, and the AGND pin must tie directly to a low-impedance ground plane to avoid digital-coupling errors. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX145BEPA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX145BEPA is a +2.7V to +5.25V, low-power, 2-channel, 108ksps, 12-bit successive-approximation analog-to-digital converter (ADC) housed in an 8-pin PDIP package. According to the Analog Devices / Maxim MAX144/MAX145 datasheet, the device features a 7.4 microsecond successive-approximation ADC core, automatic power-down, a 2.5 microsecond wake-up time, an on-chip clock, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. A SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary search algorithm through an internal DAC to digitize an analog input one bit at a time per clock cycle. SAR ADCs are prized for low latency (deterministic acquisition time), high accuracy at moderate sample rates, and the absence of pipeline delay, making them well-suited to multiplexed multi-channel data-acquisition systems, instrumentation, and process control. Key features include two single-ended analog input channels (CH0, CH1) selected via software, an analog supply range of +2.7V to +5.25V, an external reference input (REF), and a low supply current that drops to microamp levels in power-down mode. The MAX145BEPA industrial-grade (-40C to +85C) PDIP package supports through-hole assembly and is fully RoHS compliant in the + variant (MAX145BEPA+). Architecturally, the MAX145BEPA integrates an input sample-and-hold, an internal 12-bit DAC, a comparator, a successive-approximation register, and SPI-compatible digital I/O on a single CMOS die. The automatic power-down function between conversions reduces average supply current to a fraction of the active value, which is critical for battery-powered or energy-harvesting applications. Typical applications include portable data loggers, industrial process-control front-ends, battery-powered instrumentation, sensor signal conditioning read-out, and handheld metering equipment where 12-bit resolution at up to 108 kilosamples per second is sufficient. When laying out a PCB, keep analog and digital grounds joined at a single point near the ADC GND pin to preserve the 12-bit accuracy across the full sample rate.
MAX145BEUA - 12-Bit, 108ksps, 2-Ch SAR ADC | Maxim Integrated
The Maxim Integrated MAX145BEUA is a 12-bit, 108ksps, 2-channel successive-approximation analog-to-digital converter (ADC) housed in an 8-pin μMAX package. It operates from a single +2.7V to +5.25V supply, features a 7.4 µs successive-approximation conversion cycle, automatic power-down, 2.5 µs wake-up, an internal 4 MHz oscillator, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. An ADC (analog-to-digital converter) is a data-conversion IC that samples a continuous analog voltage and converts it into a discrete digital code proportional to the input level. SAR (successive-approximation register) ADCs balance speed, resolution, and power efficiency, making them the dominant architecture for multiplexed low-power sensing and instrumentation. Within the broader IC hierarchy: ADC -> data converter -> mixed-signal IC -> signal chain -> semiconductor. SAR ADCs are typically preferred over delta-sigma or pipelined types when low latency, low power, and moderate resolution (10-16 bits) are required at sample rates up to a few hundred kilosamples per second. The MAX145's two analog input channels, plus its low-power shutdown mode that draws typically < 1 µA between conversions, make it well suited to portable, multiplexed sensor systems. The 8-pin μMAX footprint and 3-wire serial interface reduce board area and pin count compared to parallel-output ADCs. The successive-approximation architecture uses an internal binary-weighted capacitor DAC and comparator. Each conversion takes 7.4 µs, and the serial interface streams out 12 bits at clock rates up to the internal 4 MHz oscillator limit, allowing the host microcontroller to read conversions quickly between samples. Typical applications include portable data loggers, battery-powered instrumentation, multiplexed sensor signal chains (temperature, pressure, strain gauge), loop-powered 4-20 mA transmitters, and handheld meter front-ends where low supply current, small PCB area, and a simple SPI host interface are essential design constraints. When designing with the MAX145BEUA, place a 0.1 µF decoupling capacitor as close as possible to the VDD pin and ensure the analog input traces are routed away from digital switching nodes to minimize coupling noise. Use the automatic power-down mode between conversions to achieve < 1 µA quiescent current in duty-cycled sensor applications. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, practical layout notes, and an FAQ set not found on the manufacturer datasheet, giving engineers a single source for part selection, sourcing, and design guidance.
MAX146AEAP - 12-Bit 8-Ch 133 kSPS SAR ADC | Analog Devices
The Analog Devices MAX146AEAP is a +2.7V low-power, 8-channel, serial 12-bit successive-approximation analog-to-digital converter (SAR ADC) housed in a 20-pin SSOP (EAP) package. It integrates an 8-channel analog input multiplexer (4 differential or 8 single-ended), a high-bandwidth track-and-hold, a 2.5V internal reference (the MAX146 variant), a serial SPI/QSPI/MICROWIRE-compatible interface, and a low-power shutdown mode, sampling at up to 133 kSPS. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm to convert an analog input to a digital code in a fixed number of clock cycles per conversion. SAR ADCs sit between delta-sigma converters (which trade speed for resolution) and flash ADCs (which offer speed but consume large power and silicon area), making them the workhorse choice for multiplexed data-acquisition channels at medium speeds (10 kSPS to 1 MSPS) and moderate resolution (10 to 16 bits). Key features of the MAX146AEAP include 133 kSPS throughput, low 1.3 mA operating supply current (shutting down to 1 microamp between conversions), single +2.7V to +5.25V analog supply operation, hard-wired active-low SHDN-bar input plus software-controllable auto-shutdown at end-of-conversion, an internal 2.5V reference with ±1.5% adjustable range via the reference-buffer amplifier, and integrated input protection rated to ±16V (allowing direct connection to industrial sensor lines without external clamping). The device uses a capacitive-DAC SAR core with auto-calibrated MSBs and a low-drift buried-zener reference, achieving ±1 LSB INL (max) and ±1 LSB DNL (no missing codes at 12 bits). The high-bandwidth track-and-hold supports input bandwidths above 2 MHz, preserving accurate capture of fast transient signals. A serial digital interface runs from a separate +2.7V to +5.25V digital supply, enabling mixed-voltage designs where the ADC and downstream microcontroller use different rails. Typical applications for the MAX146AEAP include portable battery-powered data loggers, multichannel sensor-front-end digitizers (thermocouple, strain-gauge bridge, pressure transducer), industrial process-control instrumentation with 4-20 mA loop inputs, patient-monitoring medical devices, and automotive body-system sensor acquisition. The integrated 8-channel mux and internal reference minimize BOM cost and PCB area. When designing with the MAX146AEAP, place a 0.1 microfarad ceramic bypass capacitor within 5 mm of AVDD and a 1 microfarad tantalum or ceramic capacitor between REF and AGND, and connect AVSS/DVSS to a clean ground plane. Drive unused analog input pins to a valid DC level (AVDD or AVSS) to prevent input-channel crosstalk; do not leave analog inputs floating. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX146AEPP+ - 12-Bit 8-Ch 133ksps ADC | Maxim Integrated
The Maxim Integrated MAX146AEPP+ is a 12-bit, 8-channel, low-power, serial-interface successive-approximation ADC housed in a 20-pin PDIP (EPP) package. It accepts either 8 single-ended or 4 differential analog inputs and supports throughput rates up to 133 ksps. The device operates from a +2.7 V to +3.6 V single supply, drawing only about 1.2 mA at full speed and dropping to under 1 µA in shutdown. An SAR ADC (Successive-Approximation Register Analog-to-Digital Converter) is a precision data-conversion architecture that resolves each conversion in a fixed number of clock cycles by binary-searching against an internal DAC. SAR ADCs offer a deterministic latency, no pipeline delay, and excellent DC accuracy, making them a workhorse for multiplexed multi-channel data-acquisition systems, sensor readout, and instrumentation front-ends where the input signal bandwidth is below a few hundred kHz. Key features of the MAX146AEPP+ include an internal 2.5 V reference (with separate REFADJ pin for fine adjustment), a low-noise sampling front-end, hardware-/software-configurable unipolar/bipolar input ranges, and an SPI/QSPI/MICROWIRE-compatible serial interface. Internal autoshutdown between conversions drops the supply current dramatically for battery-powered or duty-cycled applications. The device also provides an analog input clamp that protects the input from over-voltage transients. Typical applications include portable instrumentation, 4-20 mA industrial loop digitizers, multi-channel sensor data loggers, patient monitoring front-ends, and front-panel meter signal conditioning. The MAX146AEPP+ is pin-compatible with the MAX146BEPP+ (higher-speed variant) and other members of the MAX146 family in the same 20-pin PDIP footprint, simplifying system upgrades and BOM substitutions. When designing with this device, decouple VDD with a 10 µF and 0.1 µF capacitor pair placed within 5 mm of the supply pins, route the analog and digital grounds separately back to a single star point, and keep the analog inputs away from the serial clock trace. The internal reference is adequate for many applications, but an external low-noise reference (e.g. MAX6126) is recommended for absolute accuracy better than ±2 LSB. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.