ADC/DAC
محصولات (2,700+)
MAX1309ECM/V+ - 12-Bit 4-Ch 1.075Msps SAR ADC | Maxim Integrated
The Maxim Integrated MAX1309ECM/V+ is a 12-bit, 4-channel, simultaneous-sampling successive-approximation-register (SAR) analog-to-digital converter (ADC) with up to 1.075 Msps per-channel throughput, packaged in a 48-pin LQFP (7x7 mm). It accepts software-configurable input ranges of ±10V, ±5V, and 0 to +5V using on-chip ±18V-over-range-protected true-differential inputs that tolerate up to ±16.5V without damage. The /V+ suffix indicates the part is the automotive/V-grade variant qualified to higher reliability standards. An ADC (analog-to-digital converter) is a data-acquisition component that converts real-world analog signals into discrete digital codes for processing by a microcontroller, DSP, or FPGA. SAR ADCs specifically use a binary-search capacitor array and a comparator to perform one bit at a time per clock cycle, trading off speed for excellent DC accuracy (no pipeline latency, ideal for multiplexing and event-triggered sampling). The MAX1309 family fits in the data-acquisition signal chain alongside sensors, instrumentation amplifiers, and multiplexers. Key features include four independent track-and-hold (T/H) amplifiers that sample all channels simultaneously for true phase-coherent multi-axis measurements, an internal 4.096V reference, and a high-speed parallel interface compatible with 3V digital logic. The device operates from a single 3.0V analog supply plus a separate 3.0V digital supply for noise isolation. Per-channel throughput up to 1.075 Msps is achievable using an external clock up to 25 MHz. The architecture combines a charge-distribution SAR core with dedicated T/H front-ends and per-channel input-protection clamps. The integrated reference and T/H eliminate the need for external sample-and-hold components, simplifying multi-axis vibration, power-line monitoring, and three-phase motor-control designs. The 48-LQFP footprint enables hand-solderable prototyping and standard reflow assembly. Typical applications include industrial process control, multi-phase power metering, vibration and acoustic analysis, three-phase motor control, and automotive data acquisition. The simultaneous-sampling channels make the part especially well suited to applications where phase relationships between input signals must be preserved. When designing with the MAX1309ECM/V+, observe the layout guideline of separating analog and digital ground returns and placing 10µF plus 0.1µF bypass capacitors as close as possible to each supply pin. Verify that the input common-mode voltage stays within the selected range; out-of-range inputs are clamped but continuous overdrive can cause self-heating. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.
MAX130CQH+D - 3.5 Digit ADC w/ Bandgap Reference | Maxim
The Maxim Integrated (Analog Devices) MAX130CQH+D is a 3.5-digit (BCD or sign-magnitude) integrating analog-to-digital converter (ADC) with an on-chip bandgap reference, packaged in a 44-pin LCC (Leadless Ceramic Chip Carrier) LCCC surface-mount enclosure. It accepts a differential input voltage range of ±200 mV (or 0.2 V to 2 V single-ended depending on configuration) and converts it to a digital output with ±2000-count resolution (plus over-range), making it the historical benchmark IC behind classic 3.5-digit digital panel meters (DPMs). An integrating ADC (also called a dual-slope ADC) is a class of analog-to-digital converter that converts an unknown input voltage into a digital count by integrating the input signal over a fixed time window, then measuring the de-integration time against a known reference. Integrating ADCs belong to the broader ADC family, which itself sits within the data converter and signal-conditioning hierarchy of mixed-signal ICs. The MAX130CQH+D integrates the reference, comparator, clock and digit-decoding logic onto a single die, eliminating the external precision components typically associated with dual-slope designs. Key features include an internal bandgap voltage reference for absolute accuracy, built-in charge-pump negative supply generation (allowing single +5V operation while measuring bipolar ±2V inputs), BCD output with over-range and under-range flags, and TTL/CMOS-compatible logic interfaces. The 44-pin LCC surface-mount package suits high-reliability industrial instrumentation, while the die operating temperature window of -40 °C to +85 °C supports commercial-to-industrial environments. Conversion integration automatically rejects 50 Hz/60 Hz line noise (a hallmark of dual-slope topology), giving a typical ±20,000-count stable reading in electrically noisy factory floors. Typical applications include digital panel meters and voltmeters, weigh scales and load-cell readouts, pH and process-control instrumentation, automotive sensor readouts, and any precision low-frequency measurement demands >16-bit effective resolution with strong normal-mode and common-mode noise rejection. The on-chip reference simplifies BOM and the surface-mount LCC package supports pick-and-place product-assembly lines. When designing with this part, place a 0.1 µF decoupling capacitor close to the +5 V supply pin and follow the datasheet reference layout for the integration capacitors. Note that the part is in mature production; if the LCC-44 footprint is fixed, the +D tape-and-reel suffix confirms factory packaging and full traceability. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - helping engineers decide between the MAX130CQH+D, its commercial/industrial siblings, and current-generation alternatives.
MAX130CQH+TD - 3½ Digit ADC w/Bandgap Ref | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX130CQH+TD is a 3½-digit analog-to-digital converter (ADC) with integrated bandgap reference, packaged in a 44-pin LCC (Leadless Chip Carrier, J-bend) format. The device uses a dual-slope conversion architecture that provides inherent noise rejection of 50 Hz/60 Hz line-frequency interference, a feature particularly valuable in industrial panel meters and digital multimeter designs. The integrated bandgap reference eliminates the need for an external precision voltage reference, simplifying the BOM and improving long-term temperature stability. An ADC (Analog-to-Digital Converter) is a data conversion integrated circuit that transforms a continuous analog input voltage into a discrete digital code for processing by a microcontroller or display driver. In the signal-chain hierarchy, the ADC sits between the analog front end (sensor, amplifier, filter) and the digital domain (MCU, display, communication IC). Dual-slope ADCs excel at integrating slowly varying DC signals while rejecting periodic noise, making them the dominant architecture for low-cost, high-accuracy digital panel meters used in industrial control equipment. Key features of the MAX130CQH+TD include a maximum analog input range of ±2 V (with 200 mV to 2 V per the input range specified), an industrial operating temperature grade from -40°C to +85°C, and an LCC-44 plastic surface-mount package conforming to MO-047AC. The +TD suffix indicates tape-and-reel packaging for high-volume assembly, and the C-grade marking confirms industrial temperature screening. The 44-terminal LCC provides robust mechanical mounting for vibration-prone environments and remains compatible with reflow soldering profiles typical of lead-free SMT lines. The MAX130CQH+TD utilizes a charge-balancing dual-slope integrator combined with an auto-zeroing cycle, allowing it to null amplifier offset and reference drift before each conversion. According to the Maxim datasheet for the MAX130 family, the device provides three decimal digit BCD outputs plus a polarity/sign bit plus an over-range flag, intended for direct drive of LCD or LED displays via external display drivers. The architecture achieves ±2000-count resolution with ±1-count accuracy, which equals ±0.05 % of full-scale - more than sufficient for most process-control readouts and bench meters. Typical applications include 3½-digit digital panel meters, handheld DMM front ends, process-control readouts, weigh-scale indicators, and industrial sensor signal conditioning boards. The 50 Hz/60 Hz rejection makes it ideal for any installation near variable-frequency drives or switching power supplies, where periodic noise couples into thermocouple, RTD, or transducer inputs. When designing with the MAX130CQH+TD, pay attention to PCB layout near the integrator capacitor pins; routing digital display driver signals away from these traces prevents beat-frequency interference. The lead-free LCC-44 package requires careful solder paste stencil design because the J-bend terminations under the package edge are not visually inspectable after reflow, so AOI or X-ray inspection is recommended for production runs. This page synthesizes distributor pricing, drop-in and pin-compatible alternatives, design notes, and FAQ answers not co-located in the Maxim datasheet, giving procurement engineers a faster path to substitute, qualify, or purchase this long-lifecycle industrial ADC.
MAX130EPL+ - 16-Bit Dual-Slope ADC | Maxim Integrated
Maxim Integrated MAX130EPL+ is a 16-bit dual-slope analog-to-digital converter with one analog input, parallel word access, CMOS construction, and a 40-pin PDIP package. The verified listing identifies a 3.5-digit A/D converter with an integrated bandgap reference and industrial-temperature through-hole packaging. Its dual-slope architecture converts an input voltage into a time-based digital result, while the parallel interface allows the measured word to be read by compatible digital circuitry. A dual-slope ADC is a integrating analog-to-digital converter that integrates the unknown input for a fixed interval and compares it with a reference over another interval. This method is well suited to slowly changing or low-frequency measurements because it averages periodic disturbances and can provide good noise performance when the integration timing and digital filtering are selected appropriately. The MAX130EPL+ belongs to the broader ADC and data-conversion semiconductor hierarchy. The verified sources identify the device as a 16-bit converter with a dual-slope conversion technique, one channel, parallel word access, CMOS technology, and a PDIP-40 package. They also describe the MAX130 family as 3.5-digit A/D converters with a bandgap reference. The listed package is a 40-pin plastic DIP, making the part suitable for through-hole industrial and instrumentation designs rather than compact surface-mount assemblies. The integrated bandgap reference provides the conversion system with a stable internal reference function. Exact reference voltage, input range, conversion time, accuracy, operating temperature, supply voltage, and current consumption were not supplied in the verified excerpts, so those parameters remain unspecified here. Engineers should consult the manufacturer datasheet before setting analog gain, selecting reference components, or calculating timing margins. Typical uses include digital panel meters, laboratory measurement equipment, process monitoring, industrial instrumentation, sensor interfaces, and low-frequency data acquisition. The 40-pin PDIP footprint favors prototypes, repairable equipment, and industrial control boards where through-hole assembly and generous component spacing are useful. The parallel output can simplify connection to older microprocessors, counters, display drivers, or custom digital control logic. For a new design, verify the complete electrical limits, reference requirements, input conditioning, acquisition timing, and pin mapping against the official datasheet. Do not infer a replacement from the 40-pin package alone: the replacement must match the pinout, conversion method, reference arrangement, input range, interface timing, and measurement accuracy requirements.
MAX1311ECM+T - 12-Bit 1075ksps Parallel ADC, ±10V Input | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1311ECM+T is a 12-bit, 1075 ksps analog-to-digital converter with parallel-output data bus in a 48-pin LQFP (7x7 mm) package. The single ADC channel accepts ±10V, ±5V, and 0 to +5V true bipolar analog input ranges without external signal conditioning, simplifying data-acquisition front-end design. The integrated input protection and high-impedance input structure simplify signal chain design in industrial process control and instrumentation equipment. Housed at the 48-LQFP (7x7) footprint with industrial temperature grade, the MAX1311ECM+T targets multi-channel or single-channel high-precision data acquisition where software-configurable input ranges are required. What is an ADC? An analog-to-digital converter (ADC) is a data converter integrated circuit that samples continuous analog voltage signals and converts them into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. ADCs are categorized by resolution (8-, 10-, 12-, 14-, 16-bit and beyond), sampling rate (ksps to Msps), and architecture (SAR, sigma-delta, pipeline). Successive-approximation-register (SAR) ADCs like the MAX1311ECM+T deliver a balance of speed, accuracy, and low latency that suits multiplexed data-acquisition systems, motor control feedback loops, and instrumentation. Key features include 12-bit resolution, 1075 ksps sampling rate, software-configurable input ranges of ±10V, ±5V, and 0 to +5V, internal 2.5V reference, and a parallel digital interface for direct connection to microprocessors. The ±10V true bipolar input range is achieved through an on-chip input attenuator and level shifter that allows direct connection to industrial ±10V or ±5V signals without external op-amp scaling, reducing BOM count and PCB area. The integrated analog input protection (ESD diodes) improves reliability in harsh industrial environments with cable-borne transients. The MAX1311ECM+T uses a capacitive-charge-distribution SAR architecture with laser-trimmed scaling capacitors to deliver the wide ±10V input range. The internal 2.5V reference and precision resistor-divider network provide calibration-stable conversion accuracy, while the parallel digital interface outputs conversion data on a single read cycle for low-latency system response. Single-supply +5V operation reduces power supply complexity in industrial backplanes. Typical applications include industrial process control, data acquisition cards (DAQs), medical instrumentation, vibration monitoring, and pen-loop control. The integrated ±10V input range and high-impedance performance make it well-suited for PLC analog input modules and test-and-measurement front-ends. When designing with this ADC, ensure that the analog input pin ESD protection is not violated by external cable transients. Decouple the analog and digital supplies with 10uF and 0.1uF ceramic capacitors placed close to the AVCC and DVDD pins. Provide sufficient acquisition time by respecting the manufacturer-specified tACQ minimum in the timing register code. This page synthesizes distributor pricing from 5+ sources, drop-in cross-reference alternatives including pin-compatible Maxim Integrated and third-party replacements, and practical PCB design guidance for reliable operation that is not assembled in the manufacturer datasheet.
MAX1319ECM+ - 14-Bit 526ksps Parallel ADC | Maxim Integrated
The Maxim Integrated MAX1319ECM+ is a 14-bit, 526 ksps, single-channel analog-to-digital converter (ADC) with a parallel digital interface, housed in a 48-pin LQFP (7x7 mm) package. It belongs to the pin-compatible MAX1316-MAX1327 family of 12/14-bit SAR ADCs, sharing the same LQFP-48 footprint and pinout with the 12-bit MAX1316/MAX1317, the dual-channel MAX1318, and the higher-throughput 16-bit MAX1327 variants. This device falls within the SAR (Successive Approximation Register) ADC category. A SAR ADC is a precision data converter that uses a binary-search algorithm and an internal sample-and-hold front-end to digitize an analog signal in a fixed number of clock cycles. SAR converters offer deterministic latency, low power, and excellent DC accuracy, and they sit one tier below pipeline ADCs in speed but above delta-sigma converters in latency determinism - making them the workhorse for control-loop, motor-drive, and power-monitoring applications. Key features of the MAX1319ECM+ include 14-bit resolution, a 526 ksps sampling rate, ±1 LSB INL (typical), and a 0 to +5V analog input range from a single +5V analog supply. The parallel digital interface directly connects to microcontrollers and DSPs with 8-bit or 16-bit data buses, eliminating the timing budget overhead of a serial interface. The MAX1319ECM+ includes an internal 4.096V reference and supports both internal and external reference modes. The ADC uses a segmented architecture with input protection clamps, an on-chip clock, and a track-and-hold front end. The architecture is optimized for AC and DC performance across the industrial -40C to +85C operating range, with 70 dB SINAD and 84 dB SFDR typical dynamic performance at the maximum sampling rate. Typical applications include multiphase motor control, power-factor monitoring and correction, power-grid synchronization, vibration and waveform analysis, and industrial process instrumentation. The deterministic conversion latency also suits digital protective relays and UPS controllers. When designing with this part, populate the supply pins (AVDD, DVDD) with local 0.1uF and 10uF ceramics placed within 5 mm of the pins. Keep analog and digital ground returns separated and joined at a single star point under the exposed paddle. This page synthesizes distributor pricing, drop-in alternatives drawn from the same pin-compatible MAX1316-MAX1327 family, and practical design notes that complement - but do not replace - the manufacturer datasheet.
MAX1319ECM+T - 14-Bit 526ksps Parallel ADC | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1319ECM+T is a 14-bit, 526 ksps, single-channel analog-to-digital converter with a parallel interface, housed in a 48-pin LQFP (7 mm x 7 mm) package with industrial temperature grade. It accepts a unipolar analog input range and operates from a single +5 V analog supply with a separate digital logic supply; throughput up to 526 kilosamples per second supports high-speed data acquisition in industrial-control loops. The part is identified by base part MAX1319, package code ECM (48-LQFP), and the +T suffix denotes tape-and-reel packaging. An SAR (successive-approximation-register) ADC is a widely used architecture for medium-resolution, medium-speed conversion. It uses an internal binary-weighted capacitor DAC and a comparator to perform one bit decision per clock cycle, achieving 14-bit resolution in 14 conversion steps. Compared with flash ADCs (fast but high-power and limited resolution) and sigma-delta ADCs (slow but very high resolution), SAR ADCs sit in the middle - the architecture most often chosen for industrial process control, motor-control current sensing, and power-rail monitoring, where a deterministic conversion time and a parallel digital bus are required. Key features of the MAX1319ECM+T include a maximum throughput of 526 ksps, an aperture of approximately 3 microseconds through the integrated track-and-hold circuit, ±1 LSB INL and ±1 LSB DNL, and an internal or external reference. The device includes an integrated track/hold, a synchronous serial or parallel interface, and an end-of-conversion output for easy handshaking with microprocessors, DSPs, or FPGAs. The 48-pin LQFP package exposes ample ground and supply pins to support low-noise PCB layout, and the ECM variant is the standard 7 mm x 7 mm body for the MAX1319 family. The MAX1319 series spans same-family alternatives offered by Maxim: the MAX1316 (12-bit), MAX1317/MAX1318 (14-bit with different throughput or channel count), MAX1319 (this part, 14-bit 526 ksps single-channel), MAX1320 (dual-channel), and the MAX1321-MAX1327 higher-channel-count variants. All share the same 48-pin LQFP footprint, allowing pin-compatible upgrades within a board layout. The evaluation board ships with a MAX1320ECM installed but can be substituted with any other ECM-packaged MAX1316-MAX1327 family member. Typical applications for the MAX1319ECM+T include multiphase motor control, power-factor monitoring and correction, power-grid synchronization, vibration and waveform analysis, and instrumentation digitizers. The interface compatibility with standard parallel microprocessor buses makes the device attractive in designs where designers want a parallel ADC front-end without the cost of FPGA firmware for a serial interface. Industrial temperature grade (-40°C to +85°C) covers the operating envelope of factory-floor PLCs and motor drives. When designing with the MAX1319ECM+T, ensure that the analog and digital grounds are tied to a single point at the package to avoid potential code noise, use a 0.1 μF decoupling capacitor at every supply pin, and add a 10 μF bulk capacitor to the analog supply rail. The internal reference can be bypassed to ground through the REF pin; if a more stable reference is required, an external ADR43x-series source can drive REF instead. This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, drop-in and pin-compatible same-family alternatives from the MAX1316-MAX1327 series, and practical layout/design notes that go beyond the manufacturer datasheet's typical application circuit to help engineers speed up their selection decision.
MAX131ACQH+ - 3.5 Digit ADC w/ Bandgap Reference | Maxim Integrated
The Maxim Integrated MAX131ACQH+ is a 1-channel single dual-slope analog-to-digital converter (ADC) with on-chip bandgap reference, designed for 3.5-digit LCD display readout, housed in a 44-pin PLCC (QCCJ) package. It integrates the analog front-end, integrator, comparator, clock, bandgap reference, and LCD driver in a single IC, enabling compact digital panel meter designs. The suffix '+' indicates lead-free (Pb-free) construction; '+D' suffix denotes dry-pack handling. An ADC (analog-to-digital converter) with integrated LCD driver is a mixed-signal IC that converts an analog input voltage to a numeric BCD/7-segment output suitable for direct multiplex to an LCD. The dual-slope architecture provides excellent rejection of 50 Hz/60 Hz line-frequency noise (a critical parameter for panel-meter accuracy), and the integrated bandgap reference eliminates the need for an external precision reference, simplifying the BOM. Key features include a single +5 V supply operation, input voltage range of 0.2 V to 2.0 V (differential), ±2000-count conversion range (3.5 digits), on-chip bandgap reference with low temperature drift, on-chip LCD backplane/segment drivers, and an integrated oscillator. The 44-pin PLCC (QCCJ) package with J-bend terminal form provides a low-profile surface-mount option for industrial and commercial panel-meter designs. The MAX131ACQH+ uses a dual-slope (integrating) conversion architecture, which inherently averages out 50 Hz/60 Hz power-line interference over the integration period. The bandgap reference is laser-trimmed for low drift across the commercial 0 C to +70 C temperature range, allowing direct-reading accuracy without external calibration adjustments. Typical applications include digital panel meters (DPMs), handheld DVMs, weighing scales, process monitor readouts, and battery-powered LCD instrumentation. The integrated LCD driver directly multiplexes to a 3.5-digit 7-segment display, eliminating external display-driver ICs. When designing with this device, the input signal must be conditioned to within the 0.2 V to 2.0 V differential input range using an external input attenuator or op-amp front-end. Decoupling capacitors (typically 0.1 uF) must be placed close to the supply and reference pins. The integrating architecture requires CINT and CAZ external capacitors; their selection dictates conversion speed vs noise rejection trade-off. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, enabling faster part selection and PCB reuse for legacy panel-meter designs.
MAX131ACQH+TD - 3.5 Digit ADC Dual-Slope, PLCC-44 | Maxim Integrated
The MAX131ACQH+TD from Maxim Integrated (now part of Analog Devices) is a 3.5-digit analog-to-digital converter (ADC) using a dual-slope integration architecture, housed in a 44-pin PLCC (QCCJ) surface-mount package. The device integrates a bandgap reference, differential input, and LCD-compatible drivers, all on a single CMOS die. An ADC (analog-to-digital converter) is a semiconductor device that converts continuous analog signals into discrete digital codes; the dual-slope architecture is one of the oldest and most robust integrating-converter topologies, prized for excellent normal-mode and common-mode noise rejection because the integrator averages the input over a fixed integration window. Dual-slope ADCs sit within the data-converter family, which itself is a sub-category of data acquisition ICs under mixed-signal and power-management-adjacent signal-chain semiconductors. Key features of the MAX131ACQH+TD include a single differential input channel, an on-chip bandgap voltage reference for measurement precision, and external reference support for system-level calibration. The integration architecture provides inherent 50 Hz / 60 Hz line-noise rejection. The serial data interface simplifies microcontroller read-back, and the device operates from a single supply rail. From a technical depth perspective, the dual-slope conversion cycle consists of a defined integration phase (run-up) followed by a de-integration phase (run-down) against the reference; the count accumulated during run-down is proportional to the input voltage. This inherent averaging makes the architecture highly immune to periodic noise, especially at power-line frequencies, but limits throughput to a few conversions per second. Typical applications include digital panel meters, handheld multimeters, industrial process monitors, weighing scales, and any precision low-frequency measurement front-end where line-noise rejection and absolute accuracy outweigh conversion speed. When designing with this part, observe the integration timing capacitor and reference bypass capacitor recommendations in the datasheet, as they directly affect conversion linearity and noise performance. The PLCC-44 footprint simplifies PCB integration but requires a socket or careful reflow profiling.
MAX131CMH - 3.5-Digit ADC with Bandgap Reference | Maxim
The Maxim Integrated MAX131CMH is a 3.5-digit analog-to-digital converter with an integrated bandgap reference, supplied in a 44-pin MQFP package. It is designed for panel-meter, digital-panel-display, laboratory-instrument, and industrial measurement applications that require conversion of a differential analog input into a digital measurement result. The verified manufacturer and distributor listings identify the device as a 3 1/2-digit ADC with bandgap reference, and the manufacturer describes the MAX130 and MAX131 families as using a bandgap reference to generate an analog common voltage with guaranteed long-term stability. A 3.5-digit ADC is a special-purpose data converter optimized for measurement displays rather than high-resolution waveform acquisition. It can represent a decimal reading with approximately three and a half significant digits, which is useful for measuring slowly changing quantities such as temperature, pressure, voltage, current, or process variables. The integrated bandgap reference supplies a stable reference for the conversion system, reducing the need for an external precision reference in suitable measurement designs. Key product characteristics include the 3.5-digit conversion format, integrated bandgap reference, 44-terminal MQFP construction, and commercial temperature grade as shown in the verified distributor data. The MAX131 family is also available in MAX131A versions, which the manufacturer states have a maximum temperature coefficient of 50 ppm/°C, compared with 100 ppm/°C for the standard MAX130 and MAX131 families. These variants provide a useful selection distinction when reference stability is more important than basic display-oriented measurement resolution. The MAX131 is generally used where a controller, display, or system input needs a stable, low-cost measurement value. The common-mode input arrangement allows the converter to be used with suitable external signal-conditioning networks for sensors and resistive dividers. The reference architecture is important because measurement accuracy depends not only on the ADC itself but also on the reference voltage, input conditioning, grounding, and the time required for conversion. Designers should pay particular attention to input range, differential input polarity, conversion timing, reference decoupling, and the layout of sensitive analog signals. The 44-pin MQFP package requires adequate PCB area and careful routing, especially when the measured signal is close to the converter's resolution limit. The manufacturer product page and datasheet should be consulted for the complete electrical characteristics, timing diagrams, reference limits, and recommended application circuit. This page combines the verified manufacturer description, distributor package information, source links, application guidance, and design notes for engineers evaluating the MAX131CMH. Pricing and availability should be checked against current distributor records because component inventory and lead time can change after the verified data date.
MAX131CQH+TD - 3.5-Digit Dual-Slope ADC w/ Bandgap Ref | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX131CQH+TD is a 3.5-digit dual-slope analog-to-digital converter with an integrated bandgap reference, housed in a 44-pin PLCC (16.59 x 16.59 mm, LCCC package code QCCJ) surface-mount package. It accepts single-ended analog input voltages of 0.2 V to 2 V full-scale, drives LCD displays directly, and operates from -40 C to +85 C across the industrial temperature range. A dual-slope ADC (also called an integrating ADC) is a precision converter architecture that measures an analog input by integrating it over a fixed time window, then de-integrating against a known reference. The integration/de-integration cycle inherently averages out broadband noise, providing excellent normal-mode noise immunity (typically 60 Hz or 50 Hz rejection when clocked at the line frequency) without complex analog filtering. Dual-slope ADCs sit within the broader data converter / data acquisition IC family, beneath successive-approximation (SAR) and sigma-delta architectures in conversion speed but above them in noise rejection and simplicity for low-frequency panel-meter and DMM applications. Key features of the MAX131CQH+TD include the on-chip bandgap voltage reference, automatic zero and full-scale calibration, an LCD backplane driver capable of driving up to 3.5 seven-segment digits plus sign and annunciators, differential inputs through an external front-end, and a serial output interface for system-level data logging. The integrated reference eliminates the external zener or bandgap component traditionally required by 3.5-digit panel-meter designs. The +TD suffix denotes Tape and Reel packaging for high-volume SMT assembly lines. Technically, the device uses CMOS analog front-end circuitry and a charge-balancing integrator with on-chip autozero capacitors. The integrating conversion technique yields >60 dB normal-mode rejection of 50 Hz/60 Hz line noise, which is essential for industrial panel meters and digital multimeters operating near switching power supplies. The 3.5-digit resolution corresponds to a 2000-count dynamic range, sufficient for handheld DMMs, weigh scales, and process instrumentation readouts. Typical applications include digital panel meters, handheld digital multimeters, industrial process readouts, weigh scales and load-cell readouts, battery-powered portable instrumentation, and point-of-sale terminal displays. The wide industrial temperature range makes the part suitable for factory-floor equipment where temperature swings would otherwise force extra thermal compensation. When designing with the MAX131CQH+TD, place 0.1 uF bypass capacitors close to the supply pins and route the analog input traces as short, guarded differential pairs to preserve common-mode rejection. The on-chip reference requires a stable analog supply; powering from a noisy switching rail without adequate LC filtering will degrade the displayed reading. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX131EPL+ - 3.5 Digit ADC with Display Drivers | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX131EPL+ is a 3.5-digit analog-to-digital converter (ADC) with integrated display drivers and a 40-pin PDIP through-hole package. It uses a classic dual-slope conversion architecture that provides inherent 50 Hz / 60 Hz line-frequency rejection, making it well suited to digital panel meters (DPMs) and process-control readouts where the supply is fed from a rectified mains source. The integrated BCD/7-segment decoder and high-current display drivers eliminate the need for an external display controller, simplifying BOM cost. What is a dual-slope ADC? A dual-slope converter integrates the unknown input voltage over a fixed time, then de-integrates against a known reference voltage. Because the average is computed over a full line-cycle window, periodic mains interference integrates to zero, producing true RMS-like noise rejection. Within the broader taxonomy: dual-slope ADC -> ADC -> data converter -> data acquisition IC -> mixed-signal semiconductor. Key features include differential inputs, true-polarity indication, an internal reference, and high-current bipolar display driver pins that can directly sink or source typical 7-segment LED displays. The device requires external integration capacitor and resistor selection to set conversion time and full-scale range; the manufacturer's datasheet section on component selection contains the explicit design equations. Operating temperature spans the industrial -40C to +85C range. The MAX131 is fabricated on a BiCMOS process that combines bipolar drive transistors for the display outputs with CMOS logic on the same die. The 40-pin PDIP package maximizes creepage and is the standard form-factor for legacy DPM designs; surface-mount equivalent footprints exist in the same family but with different pin ordering, so footprint sharing requires a redesign. The device typically draws low quiescent current from a single +5V or +/-5V supply. Typical applications include handheld digital multimeters (DMMs), automotive battery testers, weighing scales with LED displays, industrial process controllers, and laboratory panel meters. The dual-slope architecture is favoured wherever the 50/60 Hz rejection is decisive and the conversion-rate requirement is moderate (typically a few conversions per second), as opposed to high-speed SAR or sigma-delta ADC parts. Designers should pay close attention to integrating capacitor leakage (use polypropylene or NPO ceramic for the integration cap), clock source selection (sets conversion rate and noise rejection bandwidth), and reference decoupling at the REF pin. Operating the device outside its common-mode input range yields incorrect polarity indication. The PDIP footprint enables hand-soldered prototyping and field replacement. This page synthesises distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the bare datasheet listing.
MAX1321ECM+ - 14-Bit 4-Channel 357ksps Simultaneous-Sampling ADC | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1321ECM+ is a 14-bit, 4-channel, simultaneous-sampling successive-approximation-register (SAR) analog-to-digital converter in a 48-pin LQFP (7x7 mm) package with a 357 ksps maximum throughput. It supports software-selectable true-differential analog input ranges of ±10 V, ±5 V, and 0 to +5 V on each channel pair, together with 4-/2-channel operating modes for design flexibility. What is an SAR ADC? A successive-approximation-register analog-to-digital converter is a sampling architecture that uses an internal DAC and a comparator to perform a binary search over multiple clock cycles, one bit at a time, yielding a snapshot conversion. SAR ADCs sit within the broader hierarchy of ADC technology -> data converter -> mixed-signal IC -> semiconductor device. The simultaneous-sampling capability of the MAX1321ECM+ makes it distinct from multiplexed ADCs: every enabled channel acquires its analog input at the same instant through per-channel track-and-hold amplifiers, eliminating channel-to-channel skew that would otherwise corrupt multi-phase measurements. Key specifications include ±10 V true-differential inputs (over-voltage protected to ±25 V), 357 ksps aggregate throughput with internal or external clock, an internal 2.5 V or external reference, and per-channel T/H amplifiers. The device interfaces through a 20 MHz SPI/QSPI/MICROWIRE-compatible serial port with a dedicated RDY/INT output for conversion-complete indication. Bipolar and unipolar input modes are software-selected without external hardware changes. The MAX1321ECM+ uses a charge-redistribution SAR core with input protection networks on each analog channel. The built-in T/H front-end and ±25 V over-voltage clamps allow direct connection to industrial ±10 V or ±15 V signal sources without external resistor dividers, while a digital noise-rejection filter rejects mains-frequency interference. Internal or external reference flexibility lets designers balance absolute accuracy against board area. Typical applications include multiphase motor control (simultaneous current and voltage sampling), power-grid synchronization and power-factor correction (three-phase voltage and current monitoring), vibration and waveform analysis (multi-axis accelerometers), and industrial data acquisition requiring coherent sampling across channels. The 5 V analog supply and ±10 V input range directly interface with current transformers, shunts, and line-voltage transducers. Design consideration: Place analog and digital grounds on split planes joined at a single point beneath the exposed pad of the LQFP-48. Use 0.1 µF ceramic decoupling on AVDD, DVDD, and AVDD2 pins; decoupling value and topology should follow the manufacturer datasheet reference schematic. This page consolidates distributor pricing, drop-in alternatives, and layout guidance not always present in the manufacturer datasheet, giving procurement and design engineers a single reference for evaluation, second-sourcing, and PCB integration.
MAX1323ECM+ - 14-Bit 526ksps Parallel ADC, 48-LQFP | Maxim Integrated
The Maxim Integrated MAX1323ECM+ is a 14-bit, 526 ksps single-channel analog-to-digital converter with a parallel interface, housed in a 48-pin LQFP (7x7 mm) package. The device operates from a single +5V analog supply, accepts a 0 to +5V unipolar analog input range, and delivers ±1 LSB INL (max) with 78 dB SINAD at 100 kHz input. The high-speed parallel output is byte/word selectable, simplifying connection to 8-bit or 16-bit microprocessors and DSPs. An ADC (analog-to-digital converter) is a mixed-signal IC that samples a continuous analog voltage and converts it into a discrete digital code, forming the bridge between the analog front-end (sensors, amplifiers, filters) and the digital back-end (microcontroller, DSP, FPGA). In the system hierarchy the MAX1323ECM+ sits between the analog signal chain and the digital processor; it is categorized as a successive-approximation register (SAR) ADC with sub-MHz sample rates for industrial data acquisition, instrumentation, and process-control loops. Key features include 526 ksps throughput, 78 dB SINAD, an integrated +2.5V reference, input range scaling resistors, internal or external clock option, and a low-power shutdown mode that drops quiescent current to under 10 µA. The integrated input clamp protects against ESD and out-of-range signals; an input overvoltage of ±25V does not damage the part. Power consumption is approximately 38 mW at full sampling rate. The MAX1323ECM+ uses a charge-distribution DAC and successive-approximation register architecture. A single conversion is completed in 1.9 µs; the parallel output latches the result on the rising edge of RD and remains valid until the next read. The 2.5V internal reference is trimmed to ±2% and can source up to 1 mA for external use. Typical applications include multi-channel data-acquisition boards (paired with analog multiplexers), vibration and strain-gauge instrumentation, motor-control feedback loops, medical patient-monitoring equipment, and process-control analog input modules. In these systems it replaces the slower 12-bit ADCs common in legacy designs while maintaining pin compatibility with the MAX130x and MAX131x families. When designing with this part, place a 0.1 µF ceramic bypass capacitor within 5 mm of the +5V supply pin and a 10 µF tantalum bulk capacitor at the supply entry to suppress digital switching noise. Ensure the parallel bus traces are length-matched to within 25 mm to avoid skew-induced read errors at full speed. This page synthesizes distributor pricing, drop-in alternatives from the MAX131x/MAX132x family, and practical design notes not found in the manufacturer datasheet alone.
MAX1327ECM+ - 14-Bit 526ksps Parallel ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1327ECM+ is a 526 ksps, single-channel, 14-bit successive-approximation analog-to-digital converter with a high-speed parallel interface, housed in a 48-pin LQFP (7x7 mm) package. It accepts a single-ended analog input within a unipolar input range and delivers 14-bit resolution data on a parallel digital bus. The device targets data-acquisition applications where throughput in the 100 ksps-to-1 Msps band and 14-bit dynamic range are required. The + suffix denotes the lead-free, RoHS-compliant tape-and-reel option supplied by Maxim/Analog Devices. An SAR (successive-approximation register) ADC is a sampled-data converter that uses an internal binary-search algorithm and an internal track-and-hold to digitize a sampled input voltage. Conceptually, the SAR ADC sits at the bottom of a converter hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor device. Compared with flash and pipelined ADCs of similar throughput, SAR converters typically offer the best trade-off between power consumption, latency (one conversion cycle), and DC accuracy, which is why they dominate industrial process-control, multi-meter, and motor-control front ends. Key features of the MAX1327ECM+ include true 14-bit resolution with no missing codes, an internal track-and-hold, a single +5 V analog supply, software-configurable unipolar/bipolar input ranges via input scaling, and a hardware shutdown pin that drops supply current to microamp levels. Reference input accepts an external 4.096 V reference for system-level scaling, and the parallel interface glues directly to standard 16-bit microcontrollers or DSPs without glue logic. Typical applications of the MAX1327ECM+ include industrial process control, multi-phase motor control, power-grid synchronization, vibration and waveform analysis, weigh scales, and precision instrumentation. The combination of 14-bit resolution at 526 ksps and a 48-LQFP footprint allows designers to use it as the central ADC in motor-control feedback loops, three-phase power-line monitoring, and high-accuracy data loggers. Designers should pay attention to the reference decoupling and PCB layout: place the 4.096 V reference bypass capacitor and the AVDD decoupling within 5 mm of their respective pins, route AVDD and DVDD on separate traces with independent ferrite beads, and keep digital switching currents off the analog ground plane to preserve the 14-bit linearity. Input bandwidth and input-protection components must be sized for the source impedance driving the analog input pin. The MAX1327ECM+ is one of a pin-compatible Maxim ADC family (MAX1316-MAX1319 and MAX1321-MAX1327), enabling identical PCB layout across 12-, 14-, and 16-bit resolution variants. This page synthesizes current distributor pricing from DigiKey/Mouser, same-package alternative options from the MAX1316-MAX1327 family and from cross-brand ADCs in the same LQFP-48 footprint, and design notes not found in the manufacturer datasheet.
MAX132CNG - ±18-Bit Serial ADC with Multi-Slope Integration | Maxim Integrated
The Maxim Integrated MAX132CNG is a CMOS, ±18-bit (plus sign), serial-output analog-to-digital converter (ADC) that uses multi-slope integration to deliver high-resolution conversions up to 100 conversions per second. Housed in a 24-pin PDIP (narrow, 300-mil) through-hole package, the device operates from dual ±4.5V to ±5.5V supplies or a single +5V supply with an external negative rail, and is rated for the 0C to +70C commercial temperature range. An integrating ADC (also called a dual-slope or multi-slope converter) is a type of data converter which performs analog-to-digital conversion by integrating the input signal over a fixed time window, then de-integrating against a reference voltage. ADCs sit in the broader data converter family inside the data acquisition (DAQ) signal chain: sensor -> signal conditioning -> ADC -> digital processing, where they convert real-world analog signals into digital codes for microcontrollers or processors. Key features include ±0.006% full-scale-range (FSR) accuracy at 16 conversions per second, 15 µVRMS low-noise performance, and ±2 pA input current over the ±512 mV full-scale input range (2 µV/LSB). The MAX132 draws only 60 µA in normal operation and drops to 1 µA in sleep mode, making it attractive for low-duty-cycle battery-powered measurement systems. The 4-wire serial interface connects easily to microcontrollers, and the chip includes a programmed output port for an external multiplexer and programmable-gain amplifier (PGA). The internal architecture combines an integrator, integrator-comparator logic, and a serial output shift register with on-chip oscillator and reference buffer. Multi-slope integration reduces conversion time versus classic dual-slope designs while still providing excellent 50 Hz/60 Hz normal-mode rejection, which is critical for industrial weighing and panel-meter applications where mains-frequency noise dominates. Typical applications include precision weigh scales, panel meters, data-acquisition systems, portable battery-powered instrumentation, temperature measurement with cold-junction compensation, and digital multimeter (DMM) front ends. The wide 0C to +70C commercial operating range and sleep-mode current also suit remote telemetry and data-logger designs. When designing with this device, ensure the input common-mode voltage stays within the supply rails and place a 10 uF bypass capacitor close to the supply leads. Because the MAX132 has no on-chip digital calibration, system-level zero and full-scale trim with the on-chip OFFSET and REFERENCE trim pins is recommended for best accuracy. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX132CWG+ - 18-Bit, 100 SPS Multi-Slope ADC | Analog Devices
Analog Devices MAX132CWG+ is an 18-bit plus-sign, serial-output analog-to-digital converter with multi-slope integration, conversion capability up to 100 conversions per second, and a 24-pin wide SOIC package. The converter provides a guaranteed ±512 mV full-scale input range, equivalent to 2 µV per LSB, and uses a simple four-wire serial interface. An ADC is an analog-to-digital converter: a semiconductor that converts a continuously varying analog voltage into a numeric value for processing, measurement, storage, or control. The MAX132 belongs to the multi-slope integrating ADC family. Its multi-slope conversion architecture provides high resolution without the conversion time associated with a conventional integrating ADC, making it useful for precision data acquisition, panel meters, weighing systems, and industrial measurement equipment. The principal specifications available from the verified manufacturer information include an 18-bit plus-sign resolution, up to 100 conversions per second, a ±512 mV full-scale range, and 2 µV per LSB. These characteristics make the MAX132 appropriate when fine input resolution and compact serial communication are more important than very high sampling rates. The four-wire serial interface also simplifies connection to a controller compared with a parallel data bus. The MAX132 family is offered in 24-pin narrow-DIP and wide-SO packages and in commercial and extended-temperature grades. The MAX132CWG+ is identified as the commercial-grade, gull-wing 24-pin SOP variant. The MAX132EWG+ is an extended-temperature counterpart identified in cross-reference information, while the MAX132CWG+T and MAX132EWG+T are tape-and-reel ordering variants rather than materially different converters. Typical applications include data loggers, weigh scales, data-acquisition systems, and panel meters. In these systems, the ADC can digitize a conditioned sensor output and transfer the conversion result over its four-wire serial interface. The ±512 mV input range requires the source to remain within that range, with appropriate conditioning, common-mode treatment, input protection, and reference selection based on the measured signal. Designers should follow the manufacturer data sheet for the exact pin names, electrical limits, reference configuration, conversion timing, and recommended input network. A clean reference voltage and well-controlled analog input are essential because offset, noise, and reference errors can limit the practical accuracy of the stated 18-bit conversion resolution. PCB layout should separate sensitive analog input and reference paths from digital clock and serial-data traces. This page combines the verified manufacturer description, distributor identification, package information, family comparisons, and engineering guidance in one decision-oriented reference. It also distinguishes true device options from tape-and-reel packaging codes so procurement teams can select the correct manufacturer ordering code.
MAX132CWG+C10203 - 18-Bit+Sign Multi-Slope ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX132CWG+C10203 is a CMOS 18-bit-plus-sign serial-output analog-to-digital converter (ADC) housed in a 24-pin wide-body SOIC (WSOIC / SOIC-24) package, integrating low-noise multi-slope conversion at 100 samples per second. It features ±512 mV full-scale input range (2 µV/LSB nominal), 100 SPS throughput, 4-wire serial interface, and an industrial commercial temperature grade of 0°C to +70°C. The integrated multi-slope architecture provides higher resolution in shorter conversion windows than classical dual-slope ADCs. Background: an analog-to-digital converter (ADC) translates continuous analog waveforms into discrete digital codes. Integrating ADCs such as the dual-slope and multi-slope families average input noise over a fixed integration window, naturally rejecting 50 Hz / 60 Hz mains interference. Multi-slope integration is a refined variant that adds auxiliary run-up and run-down phases to reduce conversion time while preserving the inherent noise-rejection characteristics of dual-slope designs. The MAX132 family sits in the precision slow-speed ADC segment of the data-converter hierarchy: ADC -> data converter -> signal-chain IC -> semiconductor. Key features of the MAX132CWG+C10203 include: 18-bit + sign resolution with 2 µV/LSB scaling, ±512 mV true bipolar input range, 100 SPS conversion rate, simple 4-wire (clock, data, CS, RDY) synchronous serial interface, ±5 V analog supply operation, low conversion noise, on-chip oscillator, and integrated digital filtering. The wide 24-pin SO footprint gives generous analog/digital isolation on the integrated PCB, and the +C10203 suffix denotes factory programming of the calibration constants for the specific lot. Typical applications include precision weigh scales, industrial data loggers, panel meters, temperature measurement systems, and bench-top digital multimeters. Because the MAX132 natively rejects line-frequency noise and provides ±18-bit resolution over the ground, it is the classic fit for load-cell signal chains and process-control front ends. Design consideration: the MAX132 requires external integration capacitors, reference capacitors, and a clock source as documented in the Maxim datasheet. Decouple AVDD and DVDD with 10 µF / 0.1 µF pairs near the IC and route the analog input traces differentially to preserve CMRR at the 2 µV/LSB level. Unique value: this page consolidates Analog Devices and Maxim distributor pricing, drop-in same-package alternatives (MAX132 family tape-and-reel variants), and practical weigh-scale design notes not duplicated in the merged datasheet.
MAX132ENG+ - 18-Bit 100SPS Serial ADC | Analog Devices
Analog Devices MAX132ENG+ is an 18-bit, single-input, multi-slope analog-to-digital converter with a serial interface, conversion rate up to 100 samples per second, and a 24-pin PDIP package. It operates from a 4.5 V to 5.5 V supply, accepts one analog input, and is specified as a dual-polarity, industrial-temperature through-hole device. According to the manufacturer datasheet, it provides ±0.006% full-scale accuracy at 16 conversions per second, 15 µVrms noise, 60 µA normal-operation supply current, and 1 µA sleep-mode supply current. An ADC is a data-conversion IC that transforms an analog voltage into a numeric value for measurement, control, display, or storage. The MAX132 belongs to the ADC and DAC hierarchy within interface integrated circuits. Unlike flash or successive-approximation converters, its multi-slope architecture integrates the input over a controlled interval, supporting high resolution with low conversion speed. The MAX132 is therefore most relevant to precision instrumentation rather than high-bandwidth signal capture. The converter's 18-bit resolution represents a 262,144-code theoretical range. Its serial I/O interface can provide programmed output for multiplexed measurements and programmable-gain operation, reducing the number of external analog channels and conditioning components required in a measurement system. A 100 conversions-per-second ceiling supports responsive control, while the lower accuracy rate specified at 16 conversions per second reflects multi-slope conversion behavior. Low power is a central benefit. Normal-operation supply current is 60 µA, while sleep mode reduces it to 1 µA. The datasheet also reports 15 µVrms low noise and ±2 pA input current. These characteristics suit battery-powered or intermittently operated instruments because the converter can reduce average current through its sleep state without requiring an external system power switch. Typical applications include data loggers, weighing scales, data-acquisition systems, panel meters, precision process measurement, and low-frequency industrial sensing. The manufacturer identifies these uses because the MAX132 balances high resolution, compact size, and low power rather than emphasizing rapid sampling or high-bandwidth signal processing. PCB design should preserve analog signal integrity by keeping the analog input path short and placing input and reference bypass capacitors close to their associated pins. Designers should also verify supply-voltage limits and serial-interface timing before replacing an existing MAX132-based design, particularly because the long-established 24-pin PDIP footprint simplifies through-hole prototyping and legacy maintenance. This page combines the verified manufacturer specifications, distributor pricing and inventory information, and cross-reference evidence with engineering-focused guidance on accuracy, power management, applications, and drop-in sourcing. The MAX132ENG+ product listing is intended to support direct purchasing and informed component selection rather than simply reproducing raw catalog fields.
MAX132EWG-T - 18-bit Serial ADC, Multi-Slope, 24-SOIC | Maxim
The Maxim MAX132EWG-T is a CMOS 18-bit plus sign, serial-output analog-to-digital converter (ADC) housed in a 24-pin SOIC wide-body (WSOIC) package. The "-T" suffix designates the tape-and-reel packaging option and the part uses multi-slope integration, allowing up to 100 conversions per second with guaranteed ±512 mV full-scale input range at 2 uV/LSB resolution. The Maxim part delivers high-resolution conversions in less time than standard integrating ADCs by combining the noise rejection of dual-slope conversion with faster settling. An ADC (analog-to-digital converter) is a data-acquisition component that samples continuous analog voltages and outputs discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Multi-slope integrating ADCs sit in the precision-measurement sub-category of data converters; they trade raw speed for excellent normal-mode noise rejection (integrator nullifies 50 Hz/60 Hz line interference) and high effective resolution at low input bandwidths. The MAX132 family targets panel meters, digital multimeters, weigh scales, and industrial sensors where 18-bit plus sign dynamic range is required. Key features include 18-bit plus sign resolution, ±512 mV true bipolar input range, 2 uV/LSB scale factor, 100 conversions/second maximum throughput, 4-wire SPI-compatible serial interface, low conversion noise, and external integration capacitor / reference configuration. The serial interface minimises pin count while allowing straightforward connection to modern microcontrollers. The 24-SOIC wide-body package simplifies hand prototyping and rework relative to smaller surface-mount alternatives. Architecturally, the MAX132 uses a charge-balancing integrator plus multi-slope run-down converter with automatic zero and full-scale calibration cycles. The MAX132EWG-T variant supplies the commercial-grade operating temperature range and is supplied on tape and reel for high-volume assembly. Compared with sigma-delta ADCs of similar resolution, the multi-slope topology offers faster response to input steps at the cost of requiring external integration components. Typical applications include digital panel meters, precision weigh scales, industrial process transmitters, temperature measurement with thermocouple/RTD front ends, and laboratory instrumentation. The bipolar ±512 mV input range makes it straightforward to digitize small differential signals directly without external instrumentation amplifiers. A key design consideration is that integrating ADCs require precision external integration components (typically polyester or polypropylene capacitors) and a low-drift reference; choose C0G/NP0 ceramic bypass capacitors directly at the supply pins and a star-ground layout to keep digital switching noise away from the analog integrator. This page synthesizes distributor pricing, pin-compatible variants in the MAX132 family, and practical design guidance not found in the bare manufacturer datasheet.
MAX133CMH+ - 3.75-Digit 20 CPS ADC | Maxim | Multimeter
The Maxim Integrated MAX133CMH+ is a 3.75-digit integrating analog-to-digital converter with a 20-conversion-per-second sampling rate, 50 ms conversion time, and ±40,000-count internal resolution. It is supplied in a 44-pin MQFP package measuring 10 mm by 10 mm. The converter is designed specifically for 3.75-digit digital multimeters and related data-acquisition systems. An integrating analog-to-digital converter is a voltage-to-digital conversion IC that integrates an input voltage over a fixed measurement interval. This measurement category belongs to the broader ADC hierarchy, which supports instrumentation, data logging, weighing, process monitoring, and panel-meter designs. Unlike successive-approximation ADCs, integrating converters are commonly selected when low-frequency measurements and specific front-end characteristics are important. The MAX133 provides a nominal 3.75-digit indication with internal resolution of ±40,000 counts. Its extra guard digit supports autozero or tare operations that reduce the effect of offset when displaying a 4,000-count measurement, providing resolution equivalent to one tenth of a displayed count. Its 50 ms conversion time corresponds to the verified sampling rate of 20 conversions per second. The one-channel integrating architecture is tailored for direct measurement and front-panel instrument use. The MAX133 and MAX134 form closely related integrating ADC families for digital multimeters, data loggers, and weigh scales. Their functional emphasis is measurement resolution rather than high-speed signal acquisition. Because the MAX133 is designed around the behavior of a 3.75-digit meter, its input network, reference arrangement, integration period, and display-processing strategy must be evaluated together when designing a new analog measurement board. Typical uses include handheld and bench digital multimeters, panel meters, weighing instruments, laboratory data loggers, and low-frequency industrial monitoring systems. The MAX133 can support the central measurement path where a regulated reference, input conditioning, and the meter’s display and controls are coordinated. The 44-pin MQFP package provides the pins required for analog inputs, reference connections, digital interface signals, supply rails, and associated control functions. Designers should preserve the recommended analog and reference layout because integrating converters remain sensitive to reference noise, grounding, leakage, and unwanted input signals during the 50 ms conversion interval. Input filtering should be selected for the intended source impedance rather than for the highest possible bandwidth. Power sequencing, bypass placement, and separation between the measurement input and digital interface also deserve attention. This page consolidates verified manufacturer and distributor information with practical application guidance, package-aware alternatives, comparison parameters, and design notes. It also identifies where source data does not establish a complete pinout, electrical limit, or verified drop-in cross-reference rather than filling those gaps with assumptions.
MAX133CPL+ - 3.75-Digit 50ms DMM ADC | Analog Devices
The Analog Devices MAX133CPL+ is a 3.75-digit integrating analog-to-digital converter for digital multimeters and data-acquisition systems, with an internal resolution of ±40,000 counts, a 50 ms conversion time, and a 40-pin PDIP package. The additional guard digit supports autozero or tare operations on a 4000-count displayed reading at one-tenth of a displayed count. An integrating ADC is a specialized data-conversion category used where a measured analog input is converted by integrating it over a defined interval. The MAX133 belongs to the broader ADC → data-converter IC → data-acquisition semiconductor hierarchy. Its integration-based measurement method and multi-pin mixed-signal interface are intended for precision panel-meter and multimeter products rather than general-purpose high-speed signal acquisition. The primary verified characteristics are 3.75-digit resolution, ±40,000-count internal resolution, a 50 ms conversion cycle, and a commercial operating grade of 0°C to +70°C. Distributor listings identify the device as a 40-pin PDIP, through-hole part. The Analog Devices product page lists the MAX133 as a production 3.75-digit DMM circuit and provides the manufacturer datasheet, documentation, tools, and product-selection resources. The MAX133 family is designed for integrating A/D converters used in 3.75-digit multimeters, data loggers, and weigh scales. The guard-digit feature is particularly useful for measurement systems that compensate offset or residual noise during autozero or tare operations. Because conversion completes in 50 ms, the device is appropriate for slow-changing measurements where stable integration is more useful than high sampling throughput. A typical implementation places the MAX133 at the center of a digital meter front end, where it digitizes a conditioned differential measurement while supporting zero or tare correction. Its through-hole PDIP-40 package favors leaded, serviceable, and instrument-style assemblies. The package also requires careful routing of the analog input, reference, supply, digital-control, and display-interface signals across 40 pins. The principal design consideration is that the MAX133 is a dedicated DMM conversion circuit rather than a general-purpose ADC. System designers should follow the manufacturer datasheet for input range, reference requirements, input impedance, excitation behavior, and display-interface timing. PCB layout should preserve a quiet analog signal path, provide stable reference routing, and place bypass and input-network components close to their associated pins. This page consolidates verified manufacturer and distributor information, same-family replacement guidance, package and sourcing details, and practical selection considerations. It also distinguishes documented facts from electrical data that was not present in the supplied records, helping engineers make a preliminary design decision before reviewing the complete MAX133 datasheet.
MAX134CMH+ - 3.75-Digit 50ms DMM ADC | Maxim Integrated
The Maxim Integrated MAX134CMH+ is a 3.75-digit integrating analog-to-digital converter designed for 3.75-digit digital multimeters, data loggers, and weigh scales. It provides an internal resolution of ±40,000 counts, a 50 ms conversion time, and operates in a 44-pin MQFP package measuring 10 mm by 10 mm. According to the Analog Devices MAX134 product page, an additional guard digit supports autozero or tare of a 4000-count displayed reading to one tenth of a displayed count. A digital multimeter ADC is a specialized interface integrated between an analog measurement circuit and a digital display or processor. In the product hierarchy, the MAX134 is an integrating ADC, which is a type of data-converter IC used to transform a continuously varying input voltage into a digital measurement. Integrating converters are especially useful in panel-meter and instrument designs because they support accurate ratiometric measurements with relatively simple external circuitry. The MAX134 family combines 3.75-digit measurement resolution with a 50 ms conversion interval. Its ±40,000-count internal scale provides additional numerical headroom for guard-digit operations, while the 4000-count displayed range corresponds to a standard 3.75-digit instrument. The 44-terminal square QFP package also provides more board area than a small-outline package, making it practical for instruments where analog routing and component access are more important than minimum PCB area. The MAX133 and MAX134 are integrating analog-to-digital converters for 3.75-digit multimeters and data-acquisition systems such as data loggers and weigh scales. The supplied manufacturer material states that the devices differ only in an electrical characteristic that is not fully reproduced in the search excerpt, so engineers should consult the complete MAX134 data sheet before selecting MAX133 or using either device outside the documented measurement architecture. Typical uses include handheld and bench multimeters, panel meters, process-monitoring instruments, load-cell and weigh-scale interfaces, and low-rate data loggers. These applications benefit from the 50 ms conversion time and guard-digit capability because the converter is intended to deliver stable displayed readings rather than high-speed waveform acquisition. The main design consideration is board implementation. Because the supplied web data identifies a 44-pin MQFP but does not provide a complete verified pin-by-pin description, designers should use the manufacturer data sheet and its reference circuit rather than infer connectivity from generic QFP libraries. Input filtering, reference selection, display drive support, and analog grounding directly influence measurement repeatability. This product page combines verified manufacturer and distributor information with application guidance, pricing context, comparison parameters, and package-specific validation notes. It also distinguishes electrically useful alternatives from suffix-only packaging variants to prevent unsafe replacement assumptions.
MAX134CPL+ - 3.75-Digit Dual-Slope ADC | Analog Devices
The Analog Devices MAX134CPL+ is a dedicated 3.75-digit digital multimeter circuit with a 20 samples-per-second conversion rate, proprietary dual-slope conversion, BCD output, and a 40-pin PDIP package. Designed specifically for digital multimeter signal conditioning, it integrates the measurement functions required to produce stable three-and-three-quarter-digit results for panel instruments and portable meters. The device is a single-channel ADC solution rather than a general-purpose high-resolution converter. A digital multimeter circuit is a specialized mixed-signal front end that converts an unknown analog input into a calibrated numeric representation suitable for a meter display. In the electronics hierarchy, the MAX134CPL+ belongs to the ADC family, combines analog measurement circuitry with digital processing, and ultimately belongs to the broader data-converter and signal-processing semiconductor category. Its 3.75-digit resolution and dual-slope operating principle are optimized for measuring direct-current voltage, resistance, and related quantities in a digital multimeter. The primary feature set includes one analog input channel, a proprietary conversion method, a 20 samples-per-second conversion rate, and direct BCD-compatible output. The 3.75-digit format provides 3,999-count resolution, while the 40-pin PDIP package provides 40 accessible connections through-hole for straightforward instrumentation prototyping. Its commercial temperature grade and through-hole construction distinguish it from surface-mount-only mixed-signal converters and make it particularly accessible for laboratory and instrument development. MAX134CPL+ is an application-specific converter rather than a conventional successive-approximation ADC. A dual-slope conversion averages the input over a defined integration interval, which is a common technique for suppressible noise in slowly changing measurements. The verified distributor information identifies the conversion method as proprietary and confirms single-channel operation, 20 sps performance, dual-slope operation, BCD output, and the 40-pin PDIP format. Typical uses include handheld and bench-top digital multimeters, panel meters, production-line test equipment, and educational laboratory instruments. A designer can use the device where a readable three-and-three-quarter-digit result and a straightforward DIP footprint are more valuable than the channel count or resolution of a general-purpose ADC. Its 20 sps rate is suitable for slow-changing values but is not intended for high-speed waveform acquisition. Designers should verify the complete electrical limits, recommended input network, reference circuit, display interface, and calibration procedure in the manufacturer datasheet before production. Because the supplied data does not expose a complete verified pin table or reference-design schematic, engineers should not infer pin functions from generic ADC layouts; the 40-pin package and device behavior must be checked directly against the official MAX134 documentation. This page consolidates the verified manufacturer and distributor facts for the MAX134CPL+, including its 3.75-digit architecture, 20 sps conversion rate, BCD output, PDIP-40 mechanical format, current pricing references, same-family drop-in candidates, and practical design considerations. It is intended as an engineering selection aid that is more transparent than a distributor title or search-result summary.