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Produtos (39.000+)

MAX1363MEUB+T - 12-Bit 4-Ch 133ksps SAR ADC | Analog Devices
MAX1363MEUB+T

MAX1363MEUB+T - 12-Bit 4-Ch 133ksps SAR ADC | Analog Devices

The Analog Devices (formerly Maxim Integrated) MAX1363MEUB+T is a 12-bit, 4-channel, low-power, successive-approximation analog-to-digital converter (ADC) with a 133ksps sampling rate and a 2.048V internal voltage reference, housed in a 10-pin µMAX (uSOP) package. It accepts 2 or 4 single-ended analog inputs and provides a digitally programmable window comparator with SMBus alert response, making it suitable as a 4-channel system monitor that runs autonomously once configured. A successive-approximation register (SAR) ADC is a precision data converter that uses a binary-search algorithm against an internal DAC to resolve an analog input to N-bit accuracy in N conversion clock cycles. ADCs of this type sit in the measurement-and-monitoring tier of the data-converter hierarchy (SAR ADC -> ADC -> data converter -> signal chain IC -> semiconductor). The MAX1363's specific subcategory - a system monitor - adds autonomous threshold comparison and a SMBus alert output, removing the burden of host-polled conversions in supervisory loops. Key features include a factory-trimmed 2.048V internal reference (giving 0.5mV per LSB at 12 bits), ±0.5 LBN integral non-linearity (INL), a single 3V to 3.6V analog supply, low 0.5mA operating supply current, and a programmable window comparator that asserts an interrupt when an input crosses user-configured thresholds. Communication is via a 2-wire SMBus-compatible interface operating up to 400kHz, and the device supports an extended -40°C to +85°C industrial temperature range. The MAX1363 differs from the sibling MAX1364 only in reference voltage (2.048V vs 4.096V); both occupy the same 10-pin µMAX footprint, so a design using the MAX1363 can be re-targeted to higher-voltage inputs by substituting the MAX1364 with no PCB rework. An internal 4MHz oscillator drives successive approximation, and the analog input structure supports true-rail inputs on the AIN pins when properly configured. Typical applications include 12-bit system monitoring with threshold alerting, single-supply data acquisition front-ends, digital panel meters, battery-powered supervisory boards, and SMBus-managed analog sensor interfaces. Because of its alert pin and programmable thresholds, it is especially useful when the host MCU cannot continuously poll each input. When designing with this device, ensure the 2.048V reference accuracy is acceptable for your LSB resolution (0.5mV/LSB) before deciding between the MAX1363 (2.048V) and MAX1364 (4.096V, 1mV/LSB). Note that 10-bit pin-compatible MAX1361/MAX1362 alternates can be used when 12-bit resolution is not required. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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MAX1364MEUB+ - 12-Bit 4-Ch 133ksps ADC with Window Comparator | Maxim Integrated
MAX1364MEUB+

MAX1364MEUB+ - 12-Bit 4-Ch 133ksps ADC with Window Comparator | Maxim Integrated

The Maxim Integrated (Analog Devices) MAX1364MEUB+ is a 12-bit, 4-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) that integrates a digitally programmable window comparator and SMBus alert response, housed in a 10-pin microMAX/uSOP package. It delivers a sampling rate of 133 ksps with an input range of 0 to 5.5 V and includes a 4.096 V internal reference, operating from a single 5 V analog supply. The integrated window comparator and SMBus alert function allow it to operate as a system monitor that can autonomously flag over-/under-voltage events without host CPU polling. What is a system-monitor ADC? A system-monitor ADC combines a precision analog-to-digital converter with a programmable threshold comparator and a digital alert interface. This class of ADC belongs to the broader hierarchy of data converters (ADC -> SAR ADC -> monitor ADC -> data acquisition IC -> signal chain IC -> semiconductor). Compared to a standalone SAR ADC, a system monitor offloads threshold detection to hardware, freeing the host MCU from continuous polling and reducing software overhead in supervisory and battery-monitoring designs. Key features include 4 single-ended analog input channels with input range 0 to 5.5 V, 12-bit resolution, 133 ksps throughput, an internal 4.096 V reference, an integrated programmable window comparator, and an SMBus alert response output for interrupt-driven monitoring. The 10-pin microMAX package measures approximately 3 mm x 3 mm, enabling compact designs in space-constrained system-monitor boards. The MAX1364MEUB+ uses a classic charge-redistribution SAR architecture with an input T/H and on-chip reference. Its window comparator is digitally programmable with upper and lower thresholds stored in on-chip registers, and the SMBus alert output implements the SMBALERT response protocol so multiple devices can share a single interrupt line. Quiescent current is kept low to suit always-on monitoring. Typical applications include 12V lead-acid battery monitoring, multi-rail system-health supervision, server/PSU voltage tracking, and standalone threshold/alerting systems. The wide input range also supports industrial 24V bus monitoring when paired with external resistive dividers. When designing with this device, the SMBus alert line requires a pull-up resistor, and the analog inputs benefit from RC anti-alias filtering when monitoring high-impedance or noisy rails.

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MAX136CMH - 3½-Digit LCD ADC with Hold | Analog Devices
MAX136CMH

MAX136CMH - 3½-Digit LCD ADC with Hold | Analog Devices

Analog Devices MAX136CMH is a low-power, monolithic 3½-digit analog-to-digital converter with a very high-impedance input and an integrated hold function in a 44-pin MQFP package measuring 10 mm by 10 mm. The converter directly drives a nonmultiplexed liquid-crystal display without external display-drive circuitry, reducing the component count in standalone panel-meter and instrument designs. An analog-to-digital converter, or ADC, converts an analog input voltage into a numeric representation for measurement, display, or further processing. The MAX136 belongs to the family of low-power, high-resolution integrating converters used in digital panel meters, laboratory instruments, weighing systems, and temperature-measurement equipment. Its 3½-digit architecture provides 1999-count resolution, while the high input impedance minimizes loading of the sensing circuit. The MAX136's most distinctive feature is a Hold pin that can freeze or retain a conversion result. Unlike the Maxim ICL7136, the MAX136 includes this function, allowing a reading to remain stable while it is inspected or transferred. The device also directly drives nonmultiplexed LCD outputs, eliminating separate LCD driver hardware when the selected display uses the compatible segment arrangement. Because the MAX136 uses a dual-slope integration technique, its performance depends on accurate reference and integration components. The manufacturer's datasheet describes the MAX136 as pin compatible with the Maxim ICL7136 after minor external component changes. That compatibility involves reviewing the Hold implementation and associated passive components rather than assuming an unconditional, board-for-board substitution. Typical uses include digital laboratory meters, industrial panel indicators, environmental monitors, laboratory scales, process readouts, and portable instruments. In each application, the high-input-impedance measurement stage can be paired with a resistive divider or sensor bridge without loading the source significantly. The LCD output reduces system complexity in designs centered on a local numeric display. For a new design, follow the reference, integration, analog-input, and display connections in the manufacturer datasheet. Pay particular attention to bypass capacitors, input filtering, PCB cleanliness, and the Hold timing. When replacing an ICL7136-based assembly, review the changed external components and verify the LCD segment mapping rather than relying on package similarity alone. This page combines the MAX136CMH device identity, package information, application guidance, design cautions, and available drop-in candidates into an engineering-focused guide. It also distinguishes confirmed family variants from a replacement that requires external circuit changes, helping designers make a controlled compatibility decision before committing a PCB revision.

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MAX138CMH - 3.5-Digit ADC with LCD Drivers | Analog Devices
MAX138CMH

MAX138CMH - 3.5-Digit ADC with LCD Drivers | Analog Devices

Analog Devices MAX138CMH is a production 3.5-digit dual-slope analog-to-digital converter with an integrated reference, charge-pump circuitry, and direct LED drivers. It operates from a single +2.5 V to +7 V supply, accepts bipolar inputs, and is offered in a 44-pin MQFP package measuring 10 mm by 10 mm. A dual-slope ADC is a type of integrating analog-to-digital converter that measures input voltage by integrating it over a fixed interval and comparing the result with a reference ramp. It belongs to the wider ADC hierarchy and is especially useful when a moderate-resolution digital measurement is required alongside direct display drive. The MAX138 combines that conversion function with circuitry intended to simplify digital panel-meter and laboratory-instrument designs. The MAX138's headline features are its 3.5-digit resolution, single +2.5 V to +7 V operating range, and integrated direct LED drivers. Its reference and charge-pump functions reduce the number of external support components required in a typical measurement circuit. Bipolar input capability is valuable for sensing voltages around ground, while the integrated display drivers provide a direct path to common-anode LED display segments. The MAX138 operating circuits are similar to those of the ICL7136, but the MAX138 adds an internal oscillator and uses an external charge-pump capacitor connected to pins 38 and 40. This integration supports autonomous conversion timing without requiring a separate clock source. The device is identified as a dual-slope converter and is designed for panel-meter-style measurement rather than high-speed waveform acquisition. Typical uses include digital panel meters, laboratory test equipment, process-monitoring instruments, temperature measurement systems, and low-speed sensor interfaces. The bipolar input capability allows negative voltages to be measured within the instrument's input network, while the LED drivers simplify displays showing three and a half digits. For PCB design, preserve the manufacturer's recommended charge-pump and reference capacitors, confirm input-network limits against the selected measurement range, and route display outputs away from sensitive analog inputs. Because this is a low-speed integrating converter, application filtering and input settling time are as important as raw conversion speed. This page summarizes the MAX138CMH's verified construction and operating characteristics, organizes its selection criteria against available family variants, and highlights practical design considerations for bipolar panel-meter and display applications.

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MAX138CPL+ - 3.5-Digit ADC with LCD Drivers | Maxim Integrated
MAX138CPL+

MAX138CPL+ - 3.5-Digit ADC with LCD Drivers | Maxim Integrated

The Maxim Integrated MAX138CPL+ is a 3.5-digit display-drive analog-to-digital converter with an integrated reference, charge-pump inverter, and direct LED drivers, operating from a single +2.5V to +7V supply in a 40-pin PDIP package. It accepts bipolar inputs and provides a resolution of 3.5 digits. The integrated architecture reduces the external components required for panel-meter and digital-display designs. A display-drive ADC is a specialized data-conversion IC that converts an analog input into a digital value and directly interfaces that value with display drivers. Within the broader hierarchy, the MAX138CPL+ is an ADC, then a display converter, then a data-conversion IC, and finally a power-management and signal-conditioning semiconductor. Its internal charge-pump inverter allows bipolar voltage measurement while the device itself operates from one supply polarity. The MAX138CPL+ combines a 3.5-digit conversion system, bandgap reference, charge-pump voltage converter, and direct LED drivers in one integrated circuit. A single +2.5V to +7V operating range supports low-voltage portable systems as well as higher-voltage industrial panel meters. The integrated reference and display drivers are particularly useful when component count, board area, and assembly complexity must be minimized. Its dual-slope conversion architecture and display-oriented feature set target measurements that require readable decimal results rather than high-speed sampled waveforms. The charge-pump inverter enables positive and negative input measurements from a single supply. Direct LED drivers provide the output path for multiplexed or segment-driven displays, reducing the need for separate display-interface circuitry. Typical applications include digital panel meters, laboratory measurement instruments, industrial process displays, temperature-measurement panels, and portable monitoring equipment. The device is particularly appropriate where a compact front panel must show three-and-a-half decimal digits from a bipolar analog input. Designers must verify input-range, display-segment, and timing requirements against the manufacturer datasheet before finalizing the panel design. The principal design consideration is preserving the required bipolar input range while keeping the charge pump and reference within their specified operating limits. Input filtering, reference stability, display contrast, and grounding directly affect displayed accuracy. Layout should separate sensitive analog inputs from display-driver return currents and provide suitable bypassing close to the supply pins. This product page consolidates manufacturer functionality, distributor availability, observed pricing, same-package alternatives, and practical panel-meter design guidance. It also distinguishes documented drop-in variants from merely similar converter families, helping engineers narrow replacement choices without treating unrelated ADC functions as pin-compatible substitutes.

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MAX138EPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices
MAX138EPL+

MAX138EPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices

The Analog Devices MAX138EPL+ is a 3.5-digit dual-slope analog-to-digital converter with an integrated bandgap reference, charge pump, and direct LED display drivers, housed in a 40-pin DIP package. It operates from a single +2.5V to +7V supply, accepts bipolar inputs, and provides direct drive for multiplexed seven-segment LED displays. The device combines a 3.5-digit measurement system with the functions normally requiring separate reference, inversion, and display-driver circuitry. A dual-slope ADC is a type of integrating analog-to-digital converter that measures an unknown input by comparing it against a reference over fixed integration periods. Its architecture is well suited to panel meters, laboratory instruments, and industrial displays because it converts slow or quasi-static input voltages into stable digital counts. Within the broader hierarchy of ADC to data-converter IC to signal-chain IC, the MAX138 combines conversion, voltage-reference, charge-pump, and display-interface functions. The MAX138EPL+ includes several integrated features that simplify a three-and-a-half-digit display design. Its internal bandgap reference supports repeatable measurements without an external precision reference. The charge pump permits bipolar input measurement from a single positive supply, while the direct LED drivers reduce the external circuitry required for common-anode multiplexed displays. The manufacturer lists the MAX138 as a production device in a 3.5-digit ADC family designed for single +2.5V to +7V operation. The MAX138 is a dual-slope converter rather than a high-speed SAR ADC. This makes it appropriate for continuously changing panel-meter readings rather than waveform sampling or high-rate data acquisition. Its integrated display circuitry places it in the LCD and LED driver category at distributors, while its core function remains analog-to-digital conversion. The industrial-temperature option is identified for MAX138EPL+ in distributor technical data. Typical uses include digital panel meters, process-monitoring instruments, laboratory test equipment, temperature-controller displays, weighing-system indicators, and portable measurement products. In these systems, the converter can accept bipolar sensor signals, generate a negative input reference through its charge pump, and update a local LED display without requiring a separate seven-segment driver IC. Designers should verify the exact LCD or LED polarity, digit-drive topology, input ranges, reference accuracy, and timing requirements against the manufacturer datasheet before layout. A 40-pin through-hole DIP package is straightforward to prototype and automate but occupies considerably more board area than a surface-mount alternative. Decoupling, analog-ground routing, and protection of the analog input remain important for stable panel-meter readings. This page consolidates the verified manufacturer specifications, distributor availability, package details, and carefully qualified drop-in comparison options. It also distinguishes verified MAX138-family substitutes from broader functional equivalents so engineers can assess PCB reuse, supply compatibility, display-drive requirements, and production availability without relying on unsupported cross-reference claims.

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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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