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MAX138EQH - 3.5-Digit LCD ADC with Reference | Analog Devices
MAX138EQH

MAX138EQH - 3.5-Digit LCD ADC with Reference | Analog Devices

The Analog Devices MAX138EQH is a single-channel, 3.5-digit dual-slope analog-to-digital converter with an integrated reference, charge pump, and direct LED drivers, supplied from a single 2.5 V to 7 V rail. The device accepts bipolar inputs and is packaged in a 44-pin PLCC with J-leads. Its integrated reference, charge pump, and display-driver resources support compact digital panel-meter designs without requiring separate reference and LCD-driver ICs. An analog-to-digital converter, or ADC, converts an analog input voltage into a digital code for measurement, display, control, or data processing. The MAX138EQH belongs to the dual-slope ADC family and resolves approximately 3.5 decimal digits. A 3.5-digit display commonly represents a full-scale value from 0000 through 1999, allowing the converter to resolve one count in a 2000-count measurement range. This resolution is well suited to digital panel meters, laboratory instruments, and process-monitoring equipment where direct numerical display is more useful than a high-resolution waveform representation. Integrated features reduce the number of surrounding components in a meter design. The on-chip reference establishes the conversion reference, while the charge-pump circuit supports the specified single-supply operating range. Direct LED drivers allow the converter to drive display elements without a separate display-driver IC. According to the Analog Devices product documentation, the MAX138 family also accepts bipolar input signals, allowing a frontend to measure positive or negative quantities relative to a defined common reference. The dual-slope conversion architecture integrates the input over a fixed measurement interval and compares the result against a reference ramp. This approach is well matched to slowly changing measurements such as temperature, pressure, level, weight, and laboratory process variables. Its practical benefits include effective rejection of periodic interference, straightforward integration into digital meters, and a direct path to LED-segment display outputs. These characteristics are more valuable than maximum conversion speed for this class of instrumentation. Typical uses include bench-top digital multimeters, temperature controllers, panel meters, laboratory displays, industrial process indicators, and compact weighing or dispensing equipment. The MAX138EQH is particularly appropriate when a readable three-and-a-half-digit result, bipolar input capability, and direct display excitation are desired in one IC. Designers should still verify front-panel drive requirements, reference accuracy, input filtering, and timing behavior against the manufacturer datasheet before laying out the PCB. A key design consideration is that the converter, reference, display outputs, and power supply share a compact analog and mixed-signal layout. Keep the input and reference paths compact, maintain stable supply decoupling near the device, and route display-drive currents away from sensitive measurement nodes. Validate the complete meter accuracy with the intended transducers, wiring, grounding, and display rather than relying only on nominal converter resolution. This product page combines the Analog Devices MAX138 family specifications with practical guidance for LCD meter design, drop-in family alternatives, package-aware comparison, and application-oriented selection. It highlights where the integrated reference, charge pump, bipolar-input capability, and LED drivers simplify a design while distinguishing it from unrelated converter families that use different packages, interfaces, or measurement architectures.

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MAX1393ETB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated
MAX1393ETB+T

MAX1393ETB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated

The Analog Devices / Maxim Integrated MAX1393ETB+T is a 1.5V to 3.6V, 312.5 ksps, 1-channel true-differential / 2-channel single-ended, 12-bit SAR ADC housed in a 10-pin TDFN (3 mm x 3 mm) package. It features automatic shutdown, fast wake-up, and a high-speed 3-wire serial interface. An SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary search algorithm and an internal capacitive DAC to digitize an analog input one bit at a time per clock cycle. SAR ADCs sit within the broader data-converter hierarchy (ADC -> data converter -> signal chain IC -> mixed-signal semiconductor) and are favored for applications needing moderate resolution at low-to-moderate sampling rates, deterministic conversion latency, and very low power consumption. The MAX1393 distinguishes itself with true-differential input capability in a single-channel configuration (or two single-ended channels), micropower operation suited for battery-powered systems, automatic shutdown between conversions to extend battery life, fast wake-up to resume sampling with minimal latency, and a compact TDFN-10 (3x3 mm) exposed-pad package that simplifies thermal dissipation and PCB layout. It supports an SPI/QSPI/MICROWIRE-compatible serial interface, simplifying connection to most modern microcontrollers and DSPs without bus-parallel pin overhead. Architecturally, the MAX1393 combines a track/hold front-end, a charge-redistribution DAC, a SAR control core, and an internal 2.5V reference option (with external reference override). The SAR conversion cycle completes in approximately 18 clock cycles, with the SCLK / DOUT / CS three-wire bus enabling throughput up to 312.5 ksps at the rated 3V nominal VDD. The integrated reference and true-differential input reduce the external BOM, lowering both cost and PCB area for space-constrained designs. Typical applications include portable and battery-powered instrumentation, sensor signal conditioning (thermistors, strain gauges, RTDs), handheld medical and fitness monitoring devices, industrial process monitoring loops (4-20 mA digitizers), data loggers, and consumer audio front-ends where 12-bit resolution is sufficient. The automatic shutdown feature extends coin-cell runtime in periodic-sampling architectures such as remote telemetry nodes. When designing with the MAX1393, ensure the input signal common-mode voltage is within the supply range and use the exposed pad for thermal relief and low-impedance ground. Add a 0.1 uF decoupling capacitor close to VDD; place the reference capacitor near AVDD/REF as the datasheet recommends for optimal AC performance. This page synthesizes current distributor stock, parametric drop-in alternatives, and design considerations not aggregated in the manufacturer datasheet alone, sourced from Maxim Integrated documentation and Octopart distributor feeds.

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MAX1393MTB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated
MAX1393MTB+T

MAX1393MTB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated

The Maxim Integrated MAX1393MTB+T is a 1.5V to 3.6V, 312.5 ksps, 1-channel true-differential / 2-channel single-ended, 12-bit successive-approximation analog-to-digital converter housed in a 10-pin TDFN-EP (3 mm × 3 mm) package. It combines micropower consumption with an automatic shutdown / fast wake-up cycle and a high-speed SPI/QSPI/MICROWIRE-compatible 3-wire serial interface, making it well suited for battery-powered precision data acquisition. An SAR ADC is a successive-approximation-register converter that performs a binary search against the analog signal using an internal DAC and comparator. Each conversion completes in one cycle of the internal clock, producing a deterministic latency and no pipeline delay. SAR ADCs occupy a unique position in the data-converter hierarchy: they sit between sigma-delta (highest resolution, lowest speed) and flash (lowest resolution, highest speed) converters, offering 8-18 bit resolution at 100 ksps to multi-msps sampling rates with very low active power. This makes them the default choice for multiplexed multi-channel low-frequency precision sampling. Key features of the MAX1393MTB+T include 312.5 ksps throughput, true-differential or 2-channel single-ended input multiplexer, automatic shutdown between conversions for extended battery life, and an external reference up to AVDD. The device also integrates a high-bandwidth track-and-hold and a serial interface that supports daisy-chaining of multiple ADCs on a single SPI bus. Architecturally, the MAX1393 uses a capacitive-charge-redistribution DAC array driven by an internal oscillator, with a single-supply LDO generating the internal core rail. The shutdown current is specified in the nanoampere range, allowing duty-cycled sampling for handheld instruments where the ADC wakes, converts, and re-enters shutdown on every host interrupt. Typical applications include portable medical instrumentation (blood-glucose meters, pulse oximeters), 4-20 mA industrial loop transmitters, handheld multimeters, battery fuel-gauges, and sensor-interface front-ends. The wide 1.5 V to 3.6 V supply range supports direct connection to single-cell Li-ion, two-cell alkaline, or 3.3 V digital rails without level shifting. When designing with this part, place the 1 µF AVDD bypass capacitor within 3 mm of the supply pin and keep the analog ground return separate from the digital switching return. Drive CNVST with a clean rising edge from a low-jitter timer or GPIO to minimize aperture uncertainty, especially when digitizing small signals near the 12-bit LSB threshold.

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MAX1394ETB+T - 8-Bit 416ksps SAR ADC, 1.5V-3.6V | Maxim Integrated
MAX1394ETB+T

MAX1394ETB+T - 8-Bit 416ksps SAR ADC, 1.5V-3.6V | Maxim Integrated

The Maxim Integrated MAX1394ETB+T is a micropower, 8-bit, 416ksps successive-approximation analog-to-digital converter (SAR ADC) with a serial output, operating from a single 1.5V to 3.6V supply. Housed in a 10-pin TDFN-EP (3mm x 3mm) package with an exposed thermal pad, it offers a 1-channel true-differential / 2-channel single-ended input configuration, automatic shutdown, fast wake-up, and a high-speed 3-wire SPI-/QSPI-/MICROWIRE-compatible serial interface. According to the Maxim datasheet, throughput is up to 416 ksps with very low supply current that drops further in auto-shutdown between conversions, making the part ideal for battery-powered and handheld instruments. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a sampling ADC architecture that resolves a single input voltage in N clock cycles by successively comparing the input against a binary-weighted DAC. SAR ADCs are valued for low latency, deterministic conversion time, and excellent DC accuracy with no pipeline delay - placing them in the hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. The MAX1394 family combines a true-differential analog front end with a serial interface to deliver high noise immunity in compact, low-power systems. Key features include a 2.7V (typ) supply current of only 0.5 mA at full 416 ksps, automatic shutdown that drops current to less than 1 microamp between conversions, an integrated input track-and-hold, single-ended or true-differential analog inputs, and a 3-wire serial digital interface compatible with SPI, QSPI, and MICROWIRE. The wide 1.5V to 3.6V supply range lets the part run directly from a single Li-Ion cell or two AA cells. The device is built on a low-power CMOS process with a switched-capacitor charge-redistribution DAC and an input track-and-hold amplifier. The reference voltage can be supplied externally or driven from the supply, while the differential input architecture rejects common-mode noise from motors or RF sources - a useful property in industrial and instrumentation designs. Typical applications include portable data logging, 4 mA-to-20 mA loop-powered sensor transmitters, pen tablets and touch screens, battery-powered instrumentation, isolated industrial monitoring, and consumer measurement devices. The combination of 416 ksps speed, micropower shutdown, and a small TDFN-10 footprint makes the part a strong fit for space-constrained, low-duty-cycle systems. When designing with this ADC, place the 0.1 microfarad supply bypass capacitor as close as possible to the AVDD pin and tie the exposed pad (EP) to analog ground for proper heat and noise dissipation. Choose an external low-noise reference when input DC accuracy is critical, since the ADC has no on-chip precision reference. This page synthesizes distributor pricing, drop-in TDFN-10 alternatives, and practical design notes not found in the manufacturer datasheet.

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MAX1394MTB+T - 8-Bit 416ksps SAR ADC | Maxim Integrated
MAX1394MTB+T

MAX1394MTB+T - 8-Bit 416ksps SAR ADC | Maxim Integrated

The Maxim Integrated MAX1394MTB+T is an 8-bit, 416 ksps successive-approximation analog-to-digital converter (SAR ADC) with two single-ended (or one true-differential) input channels, housed in a 10-pin TDFN (3x3 mm) exposed-pad package. It operates from a single 1.5 V to 3.6 V supply, drawing only micro-power quiescent current suitable for battery-powered and portable designs. A SAR ADC is a type of data converter that uses a binary-search algorithm implemented with a capacitive charge-redistribution DAC and a single comparator. Each conversion cycle resolves one bit at a time over N clock cycles for an N-bit result. SAR ADCs are valued for their deterministic latency (single-cycle conversion), low power consumption, and excellent DC accuracy compared to sigma-delta or pipelined architectures of similar resolution. The MAX1394MTB+T belongs to the data-acquisition IC category, within the signal-chain family of mixed-signal semiconductor components. Key features include 416 ksps maximum sampling rate, an external reference input for design flexibility, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, true-differential or 2-channel single-ended input, automatic power-down between conversions, and a -40C to +85C industrial operating temperature range. The 10-TDFN package with exposed pad provides low thermal resistance and a compact 3 mm x 3 mm footprint suited to space-constrained PCB designs. The device integrates an input multiplexer, sample-and-hold, and SAR core in a single IC, eliminating the need for external signal-conditioning components. The external reference allows designers to optimize the input dynamic range for transducer scaling, while the SPI-compatible serial output enables direct connection to microcontrollers, DSPs, and FPGAs without parallel data-bus overhead. Typical applications include portable instrumentation, battery-powered sensor monitoring, industrial process control loops, handheld multimeters, and consumer audio metering. The micropower consumption extends battery life in wireless sensor nodes and wearable health devices. When designing with this part, choose the external reference voltage to set the LSB weight and ensure the source impedance is below the datasheet's recommended maximum to avoid gain errors. Place a 0.1 uF bypass capacitor as close as possible to the supply pin and tie the exposed pad to a clean analog ground plane for optimal noise performance. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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MAX1395MTB+T - 10-Bit 357ksps SAR ADC, 2-Ch | Maxim Integrated
MAX1395MTB+T

MAX1395MTB+T - 10-Bit 357ksps SAR ADC, 2-Ch | Maxim Integrated

The Analog Devices (formerly Maxim Integrated) MAX1395MTB+T is a 10-bit, 357 ksps, successive-approximation-register (SAR) analog-to-digital converter offering two input channels configurable as one true-differential or two single-ended inputs, housed in a 10-pin TDFN (3x3 mm) package. It operates from a single 1.5 V to 3.6 V supply and consumes only 2.7 mW at full speed, with automatic shutdown reducing quiescent current to 1 µA between conversions. A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a comparator, a DAC, and a successive-approximation register to convert an analog input to a digital code one bit at a time, typically within N clock cycles for N-bit resolution. SAR ADCs sit within the broader data-converter family alongside flash, pipeline, sigma-delta, and dual-slope architectures, and are favored for low-latency, low-power, and easy-to-drive applications such as instrumentation, sensor read-out, and precision control loops. The MAX1395 belongs to the Maxim low-power SAR family targeted at battery-powered and portable systems. Key features include 357 ksps throughput, 1.5 V to 3.6 V single-supply operation, 2 µA automatic shutdown mode, an external REF input for ratiometric measurements, a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, and a true-differential input stage that delivers excellent common-mode noise rejection. The 10-pin TDFN-EP package provides a low thermal resistance path and a compact footprint suitable for space-constrained designs. Internally, the MAX1395 integrates a track-and-hold, comparator, charge-redistribution DAC, and SAR logic, delivering ±1 LSB INL and ±1 LSB DNL with no missing codes. The wide analog input range (0 to VREF for single-ended, ±VREF/2 for true-differential) supports bridge sensors, thermocouples, and other low-level signals without external signal conditioning. Typical applications include portable instrumentation, battery-monitoring front-ends, sensor conditioning for strain gauges and thermistors, patient-monitoring devices, and industrial process-control loops. The differential input stage makes it especially well suited for noisy industrial environments. When designing with this part, place the reference bypass capacitor (typically 0.1 µF) close to pin 7 to minimize reference noise and ensure clean conversions. The SHDN pin allows the host MCU to gate conversions for ultra-low average power in duty-cycled battery applications. This page synthesizes distributor pricing, drop-in alternatives from the same MAX139x family, and practical design notes not found in the manufacturer datasheet.

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MAX1396EUB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated
MAX1396EUB+T

MAX1396EUB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated

The Maxim Integrated (Analog Devices) MAX1396EUB+T is a 12-bit, 312.5 ksps successive-approximation-register (SAR) analog-to-digital converter that operates from a single 1.5V to 3.6V supply and offers pin-selectable 1-channel true-differential or 2-channel single-ended input operation. Housed in a 10-pin µMAX (uMAX-10, package code U10-1) package with gull-wing leads, this micropower serial-output ADC is engineered for space-constrained battery-powered instrumentation. A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm against an internal precision DAC to digitize an analog input in N conversion cycles for N-bit resolution. SAR ADCs are valued for low latency, deterministic throughput, and lack of pipeline delay - qualities that distinguish them from sigma-delta ADCs (which trade speed for higher resolution through oversampling) and from flash ADCs (which trade resolution for raw speed). The MAX1396 sits in the SAR family -> ADC -> data converter -> signal chain IC -> semiconductor hierarchy. Key specifications include 312.5 ksps maximum sampling rate, true-differential or dual single-ended input multiplexer (CH0/CH1), an SPI/QSPI/MICROWIRE-compatible serial interface, on-chip track-and-hold, and an internal 2.5V reference. The MAX1396 also integrates a low-power shutdown mode that drops quiescent current to sub-microamp levels for power-constrained applications. The µMAX-10 footprint measures approximately 3.0 mm x 3.0 mm and offers superior thermal and electrical performance over equivalent SO-10 alternatives in handheld designs. Internal calibration and a high-impedance input structure simplify front-end signal conditioning. Typical applications include portable data loggers, handheld multimeters, 4-20 mA loop-powered sensors, battery monitoring systems, isolated sensor front ends, and patient-monitoring bedside devices. The 1.5V minimum supply makes it suitable for single-cell alkaline or NiMH-powered products where the ADC can run directly from a declining battery without a boost converter. When designing with the MAX1396, place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin and keep analog input traces short and guarded to preserve the 12-bit accuracy. The internal reference requires a 1 µF external bypass capacitor for specified noise performance. Always observe the absolute maximum analog input range of VDD + 0.3V to avoid latch-up. This page consolidates distributor pricing, verified drop-in alternatives from the same Maxim/ADI family, and practical SAR-ADC layout notes not collected in the original datasheet.

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MAX1396MTB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated
MAX1396MTB+T

MAX1396MTB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated

The Maxim Integrated MAX1396MTB+T is a 1.5V-to-3.6V, 312.5ksps, 12-bit successive-approximation analog-to-digital converter (SAR ADC) housed in a 10-pin TDFN (HVSON) package. It supports a 1-channel true-differential or 2-channel single-ended input configuration and operates from a single 1.5V to 3.6V supply, drawing only 690uA (typ) at full throughput. An SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm implemented with a sample-and-hold amplifier, comparator, and a capacitive DAC. SAR ADCs sit within the broader hierarchy: ADC -> data converter -> mixed-signal IC. They are prized for low-latency, deterministic conversion - unlike sigma-delta ADCs that require digital filtering and exhibit higher latency, a SAR ADC produces a single conversion result per acquisition cycle, making it well suited to multiplexed data-acquisition and control applications. Key features of the MAX1396MTB+T include an integrated 3.84MHz internal oscillator, automatic power-down between samples (reducing supply current to <1uA at lower conversion rates), and an SPI/QSPI/MICROW-HICROWIRE-compatible serial interface. True-differential input operation simplifies interface to bridge sensors and thermocouples, while the wide 1.5V-to-3.6V supply range suits both lithium-ion and 3.3V digital systems. The device achieves at least 70dB SINAD and operates across the -40C to +85C commercial extended or -55C to +125C military temperature grade (the 'M' grade part). The MAX1396MTB+T utilizes a charge-redistribution capacitive DAC array combined with a high-bandwidth track-and-hold amplifier, achieving 312.5ksps throughput with no pipeline delay. The internal 3.84MHz oscillator eliminates the need for an external clock, and an on-chip reference buffer supports both internal 2.5V reference and external reference modes for system-flexibility. Typical applications include portable battery-powered instrumentation, 4-20mA industrial sensor loops, thermocouple and RTD signal conditioning, programmable logic controller (PLC) analog input cards, and handheld medical monitoring devices. The micropower architecture and automatic shutdown make it ideal for any low-duty-cycle data-acquisition node. When designing with this device, place 0.1uF bypass capacitors as close as possible to the AVDD and DVDD pins. Note that the part enters automatic shutdown at the end of each conversion when CS is held high, reducing idle current to less than 1uA - critical for battery-powered applications. The TDFN-10 package exposes a thermal pad on the underside that should be tied to the analog ground plane for optimal noise rejection. This page synthesizes distributor availability, parametric comparison, and practical design notes specific to the MAX1396MTB+T, complementing the manufacturer datasheet with a cross-brand drop-in view to ease second-source qualification.

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MAX1396MUB+ - 12-Bit 312.5ksps SAR ADC | Maxim Integrated
MAX1396MUB+

MAX1396MUB+ - 12-Bit 312.5ksps SAR ADC | Maxim Integrated

The Maxim Integrated (now Analog Devices) MAX1396MUB+ is a 12-bit, 312.5 ksps, 1-channel true-differential/2-channel single-ended, successive-approximation-register (SAR) analog-to-digital converter housed in a 10-pin µMAX (TSSOP-10 equivalent) surface-mount package. It operates from a single 1.5V to 3.6V analog supply, drawing only 428 µA (typ) at full speed, and integrates a true-differential analog input with input protection up to ±6V. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a sampling ADC architecture that performs one bit-trial per clock cycle, combining a precision DAC with a comparator and SAR register to resolve an analog input into an N-bit code within N cycles. Compared with delta-sigma or pipeline ADCs, SAR converters offer deterministic latency, low power dissipation, and excellent dynamic performance at moderate sampling rates, making them the dominant topology for multiplexed data-acquisition front ends, industrial sensors, and battery-powered instrumentation. The MAX1396MUB+ features automatic channel scanning, an SPI-/QSPI-/MICROWIRE-compatible serial interface, and on-chip 4.096V internal reference. Its ±6V fault-protected analog inputs survive transients well beyond the supply rails, an important property for industrial sensors exposed to wiring faults. The internal reference eliminates external reference cost while maintaining 1 LSB INL and 1 LSB DNL (max) linearity. Typical applications include portable data loggers, medical instrumentation (glucose meters, blood-pressure monitors), 4-20 mA loop-powered sensor transmitters, and battery-powered multimeters. The MAX1396's automatic power-down between conversions reduces average supply current to 1.4 µA at low throughput, extending battery life in duty-cycled designs. When designing with the MAX1396MUB+, place the 0.1 µF input/output bypass capacitors as close to the IC pins as possible. The internal reference requires a 4.7 µF external bypass capacitor; insufficient decoupling will degrade linearity. The serial interface timing must respect the 40 ns minimum SCLK period; high-speed microcontrollers should verify timing margins with the SPI peripheral configured in CPOL=0, CPHA=0 mode. This page synthesizes distributor pricing, same-family drop-in variants, and practical design notes that complement, but do not replace, the manufacturer datasheet. Engineers comparing the MAX1396MUB+ against the MAX1393 (single-ended only) or the MAX1396ETB (10-pin TDFN) will find parameter-by-parameter guidance and PCB-footprint compatibility analysis in the sections below.

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MAX1396MUB+T - 12-Bit 312.5ksps SAR ADCSPI
MAX1396MUB+T

MAX1396MUB+T - 12-Bit 312.5ksps SAR ADCSPI

The Analog Devices (formerly Maxim Integrated) MAX1396MUB+T is a micropower, 12-bit, 312.5 ksps successive-approximation analog-to-digital converter (SAR ADC) with a serial SPI/QSPI/MICROWIRE-compatible interface, offered in a 10-pin TDFN-EP (3 mm x 3 mm) package with an exposed thermal pad. The device operates from a single 1.5 V to 3.6 V supply, draws only 437 uA (typ) at full sampling rate, and supports both a single-ended 2-channel input mux and a true-differential 1-channel input mode selected by software. The integrated 1.5 MHz internal oscillator and on-chip track-and-hold eliminate the need for external timing components, simplifying low-power sensor and instrumentation designs. A SAR (Successive Approximation Register) ADC is a precision converter that performs bit-by-bit comparison against a high-accuracy internal DAC to digitize an analog input in N clock cycles, where N is the resolution. SAR ADCs occupy the middle of the speed-versus-precision trade-off space: faster than integrating or delta-sigma converters at moderate resolution, but slower than flash or pipeline architectures. They are widely used in industrial process control, multi-channel data acquisition modules, portable medical instruments, and battery-powered sensor conditioning because they require no warm-up time and consume essentially no quiescent current between conversions. SAR ADCs sit within the broader data-converter IC family, which also includes flash, pipeline, and sigma-delta architectures. The MAX1396's 312.5 ksps throughput, ±1 LSB INL and DNL, true-differential input, and 1.5 V minimum supply enable direct connection to low-voltage sensor bridges, thermocouples, and battery stacks. The on-chip 2.5 V reference (MAX1396 variant) reduces external parts count, while automatic power-down between conversions lowers average supply current to microampere levels in duty-cycled applications. The wide ±16 V input range (with appropriate input protection) and small TDFN footprint suit portable instrumentation. Typical applications include battery-powered sensor signal chains, portable medical monitors, industrial process-control loops, handheld multimeters, and 4-20 mA loop-powered transmitters. The wide supply tolerance also makes the device compatible with 1.8 V, 2.5 V, and 3.3 V microcontroller rails. Designers should note that the exposed pad must be soldered to the ground plane for thermal dissipation and low-impedance reference return; omitting it can degrade noise performance and INL by several LSBs.

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MAX139CMH - 3.5-Digit ADC with LED Drivers | Maxim
MAX139CMH

MAX139CMH - 3.5-Digit ADC with LED Drivers | Maxim

The Maxim Integrated MAX139CMH is a 3.5-digit dual-slope analog-to-digital converter with an integrated bandgap reference, charge-pump voltage converter, internal oscillator, and direct LED display drivers. It is packaged in a 44-MQFP measuring 10 mm by 10 mm and is intended for precision digital panel-meter and display applications. A panel-meter ADC is a specialized data-converter IC that measures an analog input voltage and produces a numeric representation suitable for LCD or LED indication. The MAX139CMH belongs to the dual-slope ADC family, integrating conversion timing, a voltage reference, a charge-pump circuit, and display-driver outputs. This integration allows a display instrument to combine analog front-end conditioning with direct digit and segment drive functions in one device. Key characteristics include 3.5-digit resolution, dual-slope conversion, an internal bandgap reference, and direct LED drivers. The internal oscillator removes the need for an external timing crystal, while the charge-pump circuit supports negative input handling and auxiliary voltage generation. According to the manufacturer documentation, the operating circuits of the MAX138 and MAX139 are similar to those of the ICL7136 and ICL7137, except that the MAX138 and MAX139 use an internal oscillator and an external charge-pump capacitor connected to pins 38 and 40. The MAX139CMH is suited to digital voltmeters, current-panel meters, laboratory instruments, process monitoring, and other systems that need stable decimal display output. Its direct LED-driver capability can reduce the number of separate display-driver ICs required in a meter design. The 44-MQFP package provides a defined gull-wing land pattern suitable for conventional surface-mount assembly and inspection. The most important design consideration is that the external charge-pump capacitor must be connected to the specified pins, and the input, reference, digital-interface, and display connections must follow the manufacturer pin-description table. Because this converter integrates several analog and display functions, PCB layout should preserve a quiet analog input path while routing LED outputs and supply connections away from sensitive measurement nodes. This product page organizes the manufacturer specifications, package information, pinout guidance, drop-in alternatives, and practical design notes into one engineering reference. It also identifies which parameters require confirmation from the current MAX139 datasheet before a new PCB or replacement decision is finalized.

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MAX139CPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices
MAX139CPL+

MAX139CPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices

The Analog Devices MAX139CPL+ is a 3.5-digit dual-slope analog-to-digital converter with an internal reference, charge pump, direct LED drivers, and one measurement channel, housed in a 40-pin PDIP package. It operates from a single +2.5V to +7V supply, accepts bipolar inputs, and is designed for precision digital panel-meter and LED-display applications. An ADC converts an analog input voltage into a numeric value for measurement, display, or control. The MAX139 belongs to the dual-slope ADC family within the broader ADC/DAC and integrated-circuit hierarchy. Dual-slope conversion is useful when stable, repeatable readings are more important than very high conversion speed, particularly in panel meters where input noise and reference accuracy directly affect the displayed result. Key features include 3.5-digit resolution, an internal reference, an integrated charge pump, and direct LED drivers. The direct-driver outputs reduce the external circuitry needed to illuminate a multiplexed or segmented numeric display. Operating from +2.5V to +7V also allows the converter to fit systems that cannot provide the higher supply voltage associated with many older display-driver designs. The device accepts bipolar input signals, supporting measurement systems in which the sensed voltage may cross a defined midpoint. The architecture combines a dual-slope conversion process with the MAX139 family’s integrated display support. Its internal reference and charge pump support the converter’s measurement and display functions, while the direct LED-driver outputs are intended to reduce system complexity. The Analog Devices product page identifies the MAX139 as a production device and lists a Data Sheet, Rev. 2, together with a product-selection table for family members. Typical uses include digital panel meters, laboratory and bench instrumentation, industrial process readouts, laboratory equipment, weighing or counting displays, and compact embedded measurement panels. The combination of a 2.5V-to-7V supply range and direct LED drivers is especially useful where a numeric indication must be produced without a separate display-driver IC. When designing a new board, verify the complete pinout, recommended input and reference network, LED current limits, bypass-capacitor requirements, and maximum input conditions against the manufacturer data sheet before layout is released. MAX139CPL+, MAX139CPL, and MAX139EPL-family variants use the same 40-pin PDIP format, but temperature grade, lead-free status, and electrical details must be checked rather than inferred from the suffix. This page consolidates verified manufacturer and distributor information, package details, pricing, family alternatives, and application guidance. It adds selection context beyond a distributor listing while clearly identifying parameter values that still require confirmation from the manufacturer documentation.

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MAX139EPL+ - 3.5-Digit Dual-Slope ADC | Analog Devices
MAX139EPL+

MAX139EPL+ - 3.5-Digit Dual-Slope ADC | Analog Devices

The Analog Devices MAX139EPL+ is a production 3.5-digit dual-slope analog-to-digital converter with an integrated bandgap reference, charge-pump voltage converter, and direct LED display drivers. It operates from a single +2.5V to +7V supply, accepts bipolar inputs, and is packaged in a 40-pin PDIP measuring 0.600 inches (15.24mm). The device is specified for the industrial temperature range of -40°C to +85°C. A special-purpose ADC is an integrated circuit optimized for a measurement function rather than general-purpose high-speed conversion. The MAX139EPL+ belongs to the ADC and DAC hierarchy and uses the dual-slope conversion technique, in which an unknown input is integrated over a defined interval and compared with a reference ramp. This approach is particularly useful for panel-meter and display-controller designs where moderate resolution, reference stability, and direct display excitation are more important than rapid sampling. The MAX139 integrates a bandgap reference and a charge-pump voltage converter, reducing the number of external precision components needed in suitable instrumentation. Its direct LED drivers support multiplexed numeric displays, while its 3.5-digit resolution represents readings with an effective digit count commonly used for analog panel meters. The 2.5V to 7V single-supply range accommodates both low-voltage logic-oriented systems and conventional industrial supply environments. According to the Analog Devices MAX139 data sheet, Rev. 2, the MAX139 is a production device with direct LED display drivers. The product is also described as a dual-slope ADC with bandgap reference and charge-pump functions. The two-channel description supplied with the verified distributor data distinguishes the device from the single-channel MAX139CPL+, although their shared 40-pin PDIP package allows the MAX139CPL+ to serve as a candidate replacement when its detailed electrical requirements are confirmed. Typical uses include digital panel meters, process-monitoring equipment, laboratory instrumentation, temperature display instruments, and industrial control panels. The MAX139EPL+ is most appropriate where an engineer wants a dedicated display-oriented ADC with integrated drive functions rather than a high-speed general-purpose converter. It can also be used as the measurement and display front end in equipment requiring bipolar input measurement. A key design consideration is verifying the exact LED drive topology, digit and segment connections, input range, and reference configuration before layout. Because the verified product data does not expose the complete numbered pin map, engineers should use the manufacturer's pin configuration before making a PCB or direct replacement. Do not treat the 40-pin package alone as proof of complete functional equivalence. This page combines verified manufacturer and distributor information, price context, package details, application guidance, and an independently sourced same-family replacement candidate. It also distinguishes verified facts from electrical details that still require confirmation in the manufacturer data sheet, helping engineers reduce sourcing and redesign risk without presenting unverified specifications as guaranteed.

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MAX1400CAI - 18-Bit Sigma-Delta ADC, 28-SSOP | Maxim
MAX1400CAI

MAX1400CAI - 18-Bit Sigma-Delta ADC, 28-SSOP | Maxim

The Maxim MAX1400CAI is a +5V, 18-bit, low-power, multichannel, oversampling sigma-delta analog-to-digital converter (ADC) housed in a 28-pin SSOP package. It delivers true 16-bit accuracy through a sigma-delta modulator followed by a digital decimation filter, supports 3 differential or 5 single-ended input channels, and provides a 4.8 kSPS maximum conversion rate with a serial SPI-compatible output. The MAX1400CAI serves applications requiring high-resolution measurement in industrial and instrumentation systems. A sigma-delta ADC is a type of oversampling converter that trades speed for resolution by sampling the input at a much higher rate than the Nyquist frequency and using noise-shaping to push quantization noise out of the baseband. It then decimates the high-rate bitstream into a low-rate, high-resolution code. Within the converter family hierarchy, the MAX1400CAI sits between general-purpose successive-approximation register (SAR) ADCs (faster but lower resolution) and higher-channel-count delta-sigma audio converters. As a data converter, it belongs to the broader category of mixed-signal ICs within power-management-adjacent signal-chain semiconductors. Key features of the MAX1400CAI include 18-bit resolution with no missing codes, a +5V analog supply (with +3V to +5V digital interface compatibility), low quiescent power consumption suitable for battery-powered and loop-powered designs, an integrated digital filter, and a flexible serial interface. Programmable gain and self-calibration further enhance accuracy across the input range. The 28-pin SSOP package offers a compact surface-mount footprint suitable for high-density PCB designs. Technically, the device uses a second-order sigma-delta modulator followed by a digital SINC3 decimation filter to provide simultaneous 50Hz/60Hz rejection. Internal programmable-gain amplifier (PGA) stages support gains up to 16x. The architecture achieves 16-bit effective resolution while remaining simple to interface with microcontrollers via its SPI/QSPI/MICROWIRE-compatible serial port. Typical applications include industrial process control, weigh scales, portable instrumentation, temperature monitoring with RTD/thermocouple front ends, and smart sensor signal conditioning. Its low power and 50Hz/60Hz simultaneous rejection make it ideal for line-frequency industrial environments. When designing with the MAX1400CAI, route analog and digital grounds separately and join them at a single point near the ADC. Use a low-noise precision voltage reference for absolute-accuracy applications. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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MAX1400EAI - 18-Bit Sigma-Delta ADC, 28-SSOP | Analog Devices
MAX1400EAI

MAX1400EAI - 18-Bit Sigma-Delta ADC, 28-SSOP | Analog Devices

The Analog Devices (formerly Maxim Integrated) MAX1400EAI is a +5V, 18-bit, low-power, multichannel, oversampling sigma-delta analog-to-digital converter housed in a 28-pin SSOP package. It integrates a sigma-delta modulator with a digital decimation filter to deliver true 16-bit accuracy at up to 480 sps output data rate, while supporting three differential or five single-ended input channels via an analog front-end multiplexer. A sigma-delta ADC is a type of oversampling converter that trades converter speed for very high resolution and excellent noise immunity. By sampling at many times the Nyquist rate and then digitally filtering (decimating) the bitstream, the architecture pushes quantization noise out of the low-frequency band where measurement signals live. This category sits within the broader hierarchy: ADC -> data converter -> data acquisition IC -> signal chain -> mixed-signal semiconductor. Key features of the MAX1400EAI include user-selectable decimation factor, an SPI/QSPI/MICROWIRE-compatible serial interface, on-chip PGA with gain up to 128, programmable current sources for sensor excitation, and a low 1.7 mA typical operating current from a single +5V supply. Internal calibration registers trim offset and gain at any data rate, removing the need for external trimming potentiometers in precision systems. The device is built on a low-power CMOS process and includes a digital comparator, on-chip oscillator, and flexible input multiplexer that lets engineers configure any channel as differential, single-ended, or even as a current input for 4-20 mA loops. The combination of integrated excitation current sources and high PGA gain makes it particularly well suited to direct bridge-sensor digitization without front-end instrumentation amplifiers. Typical applications include industrial process-control loops (4-20 mA, RTD, thermocouple), weigh scales and load-cell signal conditioning, portable and battery-powered instrumentation, smart sensor transmitters, and medical monitoring devices. The wide input range and integrated PGA simplify designs that previously required dedicated analog signal conditioning. When designing with this part, plan the input common-mode and PGA gain trade-off carefully: PGA gains above 32 reduce the absolute input common-mode range, so refer to the input specifications section of the manufacturer datasheet when configuring high-gain differential measurements. Place the reference bypass capacitor close to the REF pin to avoid conversion gain errors. This page synthesizes distributor pricing, drop-in alternatives, comparison parameters, and practical design notes that are not aggregated on any single manufacturer page, giving procurement and design engineers one place to evaluate the MAX1400EAI for new designs and second-source qualification.

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MAX1401EAI - 18-Bit Sigma-Delta ADC, 28-SSOP | Maxim Integrated
MAX1401EAI

MAX1401EAI - 18-Bit Sigma-Delta ADC, 28-SSOP | Maxim Integrated

The Maxim Integrated MAX1401EAI is an 18-bit, low-power, multichannel, oversampling sigma-delta analog-to-digital converter (ADC) housed in a 28-pin SSOP package and specified for industrial temperature operation. According to the Maxim datasheet, the device integrates a sigma-delta modulator with a digital decimation filter that delivers true 16-bit accuracy with no missing codes at 480 sps, and supports a maximum output rate of 4.8 ksps at reduced resolution. The +3V supply operation, 250 uA operating quiescent current, and 2 uA power-down current make it well suited to loop-powered and battery-fed sensor acquisition. A sigma-delta ADC is a converter topology that oversamples the input signal at many times the Nyquist rate and shapes quantization noise out of the signal band, allowing the use of simple 1-bit hardware with extensive digital filtering to extract high effective resolution at low input bandwidth. Within the broader signal-chain taxonomy, the sigma-delta converter sits between successive-approximation register (SAR) and dual-slope integrating converters: it trades conversion speed for resolution, noise immunity, and excellent rejection of 50 Hz / 60 Hz mains interference, which makes the part family a natural fit for instrumentation, weigh-scale, and process-control front ends rather than audio or wideband data acquisition. Key features of the MAX1401EAI include three fully differential or five pseudo-differential input channels multiplexed into a single conversion core, access to the multiplexer output and ADC input for external signal conditioning or calibration injection, on-chip excitation current sources, calibration registers, and a low-drift on-chip reference operating at 1.25 V. Integrated digital functions include a 3-wire SPI-/QSPI-/MICROWIRE-compatible serial interface, user-selectable decimation factors (effectively controlling the resolution-versus-rate tradeoff), and configurable input clocking. Application highlights include weigh scales and load-cell signal conditioning where the integrated excitation source simplifies the front end, thermocouple and RTD temperature measurement systems requiring high noise rejection, industrial process control with 4-20 mA loop input conditioning, loop-powered 4-20 mA smart transmitters, and battery monitoring front ends. Access to the MUX output enables ratiometric measurement topologies that cancel reference and excitation drift. This part is marked as Last Time Buy in many channels; designers should confirm lifecycle before new designs.

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MAX1402EAI+W - 18-Bit Sigma-Delta ADC, 28-Pin SSOP | ADI
MAX1402EAI+W

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.

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MAX140CMH+ - 3.5-Digit ADC with LED Drivers | Maxim
MAX140CMH+

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.

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MAX140CPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices
MAX140CPL+

MAX140CPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices

Analog Devices MAX140CPL+ is a production 3.5-digit analog-to-digital converter with an integrated bandgap reference, charge-pump voltage converter, and direct LED drivers. It operates from a single +2.5V to +7V supply, accepts bipolar inputs, and is supplied in a 40-pin PDIP package. The device is intended for direct digital display and panel-metering systems requiring the ADC, reference, conversion support circuitry, and display-driver functions in one package. A special-purpose ADC is an integrated circuit optimized for a defined measurement or conversion task rather than general-purpose signal processing. The MAX140 belongs to the ADC and DAC hierarchy within integrated circuits and combines measurement conversion with display-interface functions. Its integrated bandgap reference supports controlled internal conversion references, while the charge-pump circuit supports operation from the specified single low-voltage supply. The verified product information identifies the MAX140 as a 3.5-digit dual-slope ADC with direct LED drivers. Direct LED-drive capability reduces the external interface burden in digital panel meters because display segments can be driven without separate segment-driver ICs. Bipolar input support allows measurement of signals centered around ground when used with the appropriate external input network. The +2.5V to +7V operating range accommodates conventional low-voltage instrument and panel-meter designs. The MAX140 family uses the MAX140CPL+ commercial-temperature, 40-pin PDIP configuration, with an operating temperature range of 0°C to +70°C. Its through-hole package supports conventional PCB assembly and hand prototyping. The MAX140 product page identifies the family as production, while distributor listings provide current availability, pricing references, and links to the manufacturer data sheet. Typical applications include digital panel meters, process-control readouts, laboratory instruments, industrial measurement panels, and dedicated display instruments. In a panel meter, the ADC converts the analog input and the integrated LED drivers illuminate the appropriate digits and indicators. Designers must still implement the specified input conditioning, bypassing, display current, and PCB routing described in the manufacturer documentation. A key design consideration is that the integrated LED drivers do not remove the need to verify display current limits, segment patterns, input filtering, and supply bypass requirements. Engineers should review the complete pin assignment and application guidance in the MAX140 manufacturer data sheet before layout. This page consolidates verified specifications, pricing references, package data, and cross-reference findings while explicitly identifying engineering details that still require direct datasheet confirmation.

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MAX140EPL+ - 3.5-Digit LED Display ADC | Maxim Integrated
MAX140EPL+

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.

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MAX14131FAEE+ - 4-Ch 1kVrms 150Mbps Digital Isolator | Maxim Integrated
MAX14131FAEE+

MAX14131FAEE+ - 4-Ch 1kVrms 150Mbps Digital Isolator | Maxim Integrated

The Analog Devices / Maxim Integrated MAX14131FAEE+ is a 4-channel digital isolator rated for 1 kVrms isolation and 150 Mbps data rate, housed in a 16-pin SSOP (3.90 mm) package. It uses Maxim's proprietary capacitive isolation technology to deliver 25 kV/µs typical common-mode transient immunity (CMTI) while operating from 1.71 V to 5.5 V on both sides of the isolation barrier. A digital isolator is an IC that transmits digital signals across an isolation barrier (galvanic isolation) using capacitive, inductive, or optical coupling, while blocking DC and high-voltage transients. Digital isolators sit within the signal-chain hierarchy alongside op-amps, level translators, and isol gate drivers, and are commonly used in place of optocouplers where higher speed, lower propagation delay, and tighter channel-to-channel matching are required. The MAX14131 belongs to the broader category of ICs > Interface ICs > Digital Isolators. Key features include four unidirectional channels in a 3/1 (3 forward + 1 reverse) configuration, default-low output state, 8 ns typical propagation delay, and 1000 Vrms withstand voltage for 60 seconds per UL 1577. The wide 1.71 V to 5.5 V supply range on both VDDA and VDDB allows direct interfacing with 1.8 V, 3.3 V, and 5 V logic without level shifters, simplifying multi-rail designs. Internally, the MAX14131 uses Maxim's proprietary silicon-based capacitive coupling, which avoids the LED aging and current-transfer-ratio degradation inherent to optocouplers. Each channel is implemented as a differential capacitive link with on-chip encoding/decoding, achieving 150 Mbps NRZ signaling with low pulse-width distortion. Typical applications include isolated SPI / UART / I2C data links, industrial field-bus isolation (RS-485, CAN, Profibus), isolated gate-drive signaling, medical patient-isolation interfaces, and battery-management systems that require galvanic separation between high-voltage stacks and low-voltage MCUs. When designing with the MAX14131, place 0.1 µF bypass capacitors on each VDD pin within 2 mm of the package, and keep the channel trace lengths matched. The device dissipates negligible power across the barrier, but the SSOP theta_JA of around 110 °C/W should be respected at extreme ambient temperatures. This page synthesizes distributor pricing, drop-in cross-reference alternatives, and practical design notes not found in the standalone manufacturer datasheet, providing engineers with a single source for parametric comparison and PCB-level replacement decisions.

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MAX1419ETN+D - 15-Bit 65Msps ADC | 56-QFN | Maxim Integrated
MAX1419ETN+D

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.

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MAX1419ETN+TD - 15-Bit 65Msps ADC -79.3dBFS | Analog Devices
MAX1419ETN+TD

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.

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MAX1420CCM+D - 12-Bit 60Msps 3.3V ADC | Maxim Integrated
MAX1420CCM+D

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.

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