ADC/DAC
Produkte (2518)
MAX11327ATJ+T - 12-Bit 1Msps 8-Ch SAR ADC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX11327ATJ+T is a 12-bit, 1Msps, 8-channel successive-approximation analog-to-digital converter (SAR ADC) housed in a 32-pin TQFN (5x5 mm) package with an exposed thermal pad. It integrates an internal 4.096V reference and accepts a single-ended analog input from 0 to VREF (or up to VAVDD when using the internal reference), with sample rates up to 1000 ksps. The device operates from a single 2.35V to 3.6V analog supply plus a 1.71V to 3.6V digital I/O supply and supports SPI/QSPI/MICROWIRE-compatible serial interfaces at clock rates up to 50 MHz. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary-search algorithm and a precision DAC inside an internal feedback loop to converge on the input voltage. Compared with the broader hierarchy of analog-to-digital converters (SAR -> precision ADC -> data converter -> mixed-signal IC -> semiconductor), the SAR family delivers deterministic latency, low power consumption, no pipeline delay, and excellent DC accuracy - making it the dominant architecture for multiplexed-channel data-acquisition systems, instrumentation, and motor-control feedback loops. The MAX11327 belongs to Maxim's pin-compatible MAX1132x family, where channel count, resolution, and throughput scale across the series. Key features include 1Msps throughput with no latency between conversions, 12-bit resolution with INL of +/-0.5 LSB (typ), a low 3 mA (typ) operating supply current and 1 uA (typ) shutdown current, integrated internal 4.096V reference (10 ppm/C typ), eight single-ended analog inputs, an integrated 8-to-1 input mux with scan-mode sequencing, and a wide -40C to +125C automotive-grade operating temperature range. The integrated mux eliminates the need for an external analog switch and supports burst-mode sequencing for multi-channel scans. The MAX11327 uses Maxim's charge-distribution capacitive DAC architecture with an on-chip track-and-hold. The integrated reference, mux, and sequencer simplify system BOM, while the SPI-compatible serial interface supports daisy-chaining for applications that require more than eight channels. The 32-pin TQFN package's exposed thermal pad (EP) provides a low thermal-resistance path for continuous 1Msps operation across all eight channels. Typical applications include industrial process-control analog input modules, motor-control current sensing, optical-module monitoring, rack-mounted server telemetry, and automotive sensor interfaces where the -40C to +125C grade is required. The wide input range supports both voltage-output and current-loop transducer interfaces. When designing with this ADC, bypass VAVDD with a 10 uF ceramic capacitor placed within 5 mm of the EP, and provide a low-impedance AGND return from each analog input trace. Use SPI SCLK <= 50 MHz and gate SHDN low for <1 uA standby - the reference stays biased so subsequent conversions remain within specification. This page synthesizes pin-compatible drop-in alternatives, current distributor pricing, and design notes covering the MAX1132x family not found in the manufacturer datasheet alone.
MAX11329ATJ+T - 3Msps 10-Bit 16-CH SAR ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX11329ATJ+T is a 10-bit, 3Msps, low-power, serial-output successive approximation register (SAR) analog-to-digital converter with 8/15/16 input channels and post-multiplexer external signal conditioning access, housed in a 32-pin TQFN (5mm x 5mm) package. An SAR ADC is a successive approximation register analog-to-digital converter, a type of ADC that uses a binary search algorithm through an internal capacitive DAC to digitize an analog input one bit at a time per conversion clock. SAR ADCs sit within the broader hierarchy of analog-to-digital converters -> data converters -> mixed-signal ICs -> power management and signal-chain semiconductors. They are valued for deterministic latency, low power, and excellent DC accuracy at moderate speeds compared to pipeline or delta-sigma architectures. Key features include a 3Msps sampling rate, 10-bit resolution, an integrated 16-channel analog input multiplexer, and a unique post-mux access node that exposes the MUX output before the ADC input so designers can insert a custom op-amp driver or anti-alias filter between mux and ADC. Additional capabilities include an external reference input, SPI/QSPI/MICROWIRE-compatible serial interface, low power consumption, and 500kHz full-linear-bandwidth. The wide analog input range and integrated channel scan mode simplify multi-sensor designs. Typical applications include multichannel data acquisition systems, industrial process control, patient monitoring and medical instrumentation, portable battery-powered measurement equipment, and optical module monitoring. The 32-pin TQFN package combines compact footprint with adequate thermal performance for handheld and industrial designs operating from -40C to +85C. Designers should note that the MAX11329-ATJ+T operates from a single 2.35V to 3.0V analog supply and a 1.7V to 3.6V digital supply; a clean low-noise LDO such as the ADP150 is recommended for the analog rail. The post-mux access pins (MUXOUT, ADCIN) are exposed to allow an external op-amp buffer; if unused, they must be tied together with a short PCB trace. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical layout/design notes not found in the manufacturer datasheet alone.
MAX11332ATJ+T - 3Msps 12-Bit 16-Ch SAR ADC | Analog Devices
The Analog Devices MAX11332ATJ+T is a 3 Msps, 12-bit, 16-channel successive approximation register (SAR) analog-to-digital converter (ADC) with external reference and 500 kHz full-linear-bandwidth, housed in a 32-pin TQFN-EP (5x5 mm) package. It accepts 8 or 16 single-ended analog inputs through an integrated analog multiplexer and provides a serial SPI/QSPI/MICROWIRE-compatible digital interface for compact data acquisition designs. A SAR ADC is a type of analog-to-digital converter that performs conversion by binary-searching against a precision DAC and a comparator in a single clock cycle per bit. Within the broader data converter hierarchy, SAR ADCs sit between flash converters (fastest, lowest resolution) and delta-sigma ADCs (slowest, highest resolution). The MAX11332's 12-bit resolution with 3 Msps throughput makes it ideal for multiplexed multi-channel systems where fast acquisition and deterministic latency matter more than absolute noise floor. The post-mux signal conditioning access allows external amplifiers, filters, or sensor biasing between the analog input pins and the internal sample-and-hold. Key features include 3 Msps maximum sampling rate, 12-bit no-missing-codes resolution, 16 analog input channels (selectable 8 or 16 via configuration), an external reference voltage input for measurement flexibility, low power consumption (approximately 5.5 mW at 3 Msps), 500 kHz full-linear bandwidth, and a high-speed SPI-compatible serial interface operating up to 50 MHz. The TQFN-EP package provides a thermal pad that reduces junction-to-ambient thermal resistance to approximately 32 C/W. Architecture-wise, the device integrates an input multiplexer, sample-and-hold amplifier, SAR conversion core, reference buffer, and serial output logic on a single die. The external reference allows the user to optimize the ADC's input range to match sensor signals (e.g., 2.5V, 4.096V), which improves quantization noise utilization compared to a fixed 5V input range. Typical applications include multi-channel data acquisition systems, industrial process control and sensor monitoring, patient monitoring and medical instrumentation, programmable logic controllers (PLCs), and battery-powered portable instrumentation. The combination of 16 channels in a compact TQFN footprint replaces up to four dual-channel ADCs, saving board space. When designing with the MAX11332ATJ+T, ensure the external reference source is low-noise and adequately bypassed; a noisy reference directly multiplies into ADC output. Place a 0.1 uF ceramic decoupling capacitor close to each supply pin, and follow the PCB layout guidelines in the datasheet to preserve full 500 kHz input bandwidth. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineering decision support beyond what Analog Devices' product page offers.
MAX11336ATJ+T - 12-Bit 8-Ch SAR ADC 500ksps | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX11336ATJ+T is a 12-bit, 500 ksps, low-power, successive-approximation-register (SAR) analog-to-digital converter with 4-/8-/16-channel input capability and post-mux analog signal-conditioning access, housed in a 32-pin TQFN (5x5 mm) package. According to the manufacturer datasheet, the device offers a single analog supply range of 3.0 V to 3.6 V, an external reference, an SPI/QSPI/MICROWIRE-compatible serial interface, and integrated track-and-hold with ±1 LSB INL (typ) and ±1 LSB DNL (typ). The +T suffix indicates Tape & Reel packaging, and the device operates over the -40 °C to +125 °C automotive temperature range. A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm and an internal capacitive network to convert an analog input into a digital code, one bit per clock cycle. SAR ADCs occupy the middle of the converter hierarchy between flash ADCs (fastest, highest power) and delta-sigma ADCs (slowest, highest resolution). The MAX11336 belongs to the Maxim Integrated SAR ADC product family and is part of a broader category: data converter -> ADC -> SAR ADC -> multi-channel low-power SAR ADC. Compared with delta-sigma converters, SAR parts deliver deterministic latency, which makes them well suited to multiplexed multi-channel data-acquisition loops. Key features include 500 ksps throughput on a single +3.3 V supply, low power consumption of approximately 5.4 mW at full speed, hardware- or software-configurable analog input ranges, and 16 analog input channels that can be configured for 4-, 8-, or 16-channel single-ended or pseudo-differential operation. The integrated post-mux signal-conditioning access lets designers insert external filters or buffers between the multiplexer output and the ADC input - a feature rarely found in integrated multi-channel SARs. The MAX11336's CMOS SAR architecture combines an input track-and-hold with an internal reference capacitor DAC and a precision comparator. Its 500 ksps full-linear-bandwidth and external-reference architecture allow the noise floor and absolute accuracy to be tuned by the reference choice. The serial-interface controller supports SPI Mode 0 and Mode 3 with QSPI- and MICROWIRE-compatible timing modes. Power dissipation scales linearly with sample rate because there is no continuous internal conversion loop, simplifying thermal budgeting at lower throughputs. Typical applications include industrial process control and PLC analog input modules, automotive sensor interfaces (battery management, current shunt monitoring, and HVAC controls), portable and battery-powered instrumentation, optical-module monitoring, and multi-loop data-acquisition systems. The 32-TQFN (5x5) package makes the part attractive for compact PCB layouts with strict height restrictions, such as handheld test equipment and modular IO cards. When designing with this device, place the reference decoupling capacitor and the input RC network as close as possible to the analog pins, and route the analog and digital grounds as separate nets joined at a single point under the exposed pad. Because the part is specified for the automotive -40 to +125 °C range, derating of input bandwidth and reference settling time at high temperature should be validated against the datasheet AC Electrical Characteristics table. This page synthesizes distributor pricing, drop-in alternatives drawn from the same Maxim SAR ADC family and competitor parametric cross-reference data, and practical PCB layout and thermal notes that are not collected in the manufacturer datasheet.
MAX11339ATJ+T - 10-Bit 500ksps 8-Ch SAR ADC | Maxim Integrated
The Maxim Integrated MAX11339ATJ+T is a 10-bit, 500 ksps, 8-channel successive approximation register (SAR) analog-to-digital converter with post-mux external signal conditioning access, housed in a 32-pin TQFN (5x5 mm) package. The device features flexible input configurability with 4 or 8 single-ended / pseudo-differential / differential analog input channels, an external reference, and a high-speed SPI / DSP-compatible serial interface. Operating from a 2.35V analog supply (typical) and a 1.5V to 3.6V digital supply, the ADC delivers up to 500k conversions per second with low power consumption suitable for both industrial and automotive temperature grades. What is a SAR ADC? A successive approximation register ADC is a type of analog-to-digital converter that uses an iterative binary-search algorithm against an internal or external DAC to convert an analog input into a digital code. SAR ADCs deliver deterministic latency, no pipeline delay, and excellent DC accuracy, placing them in the hierarchy: SAR ADC -> ADC -> data converter -> mixed-signal IC. The MAX11339 family integrates an analog input multiplexer and track-and-hold, allowing one ADC core to sequentially sample many channels while preserving full sample-rate performance per channel. Key features include an integrated 4 or 8 input multiplexer, dedicated track-and-hold amplifier with 1:1 MUX:S&H:ADC ratio, SPI / DSP-compatible digital interface, and access to the post-mux analog front end for external signal conditioning such as programmable gain or filtering. The wide input range spans the analog supply rails, and the reference voltage is supplied externally to allow full-scale input scaling to match sensor or signal levels. Typical applications include industrial process control loops, multichannel data acquisition systems, automotive sensor monitoring, and embedded instrumentation front ends. The deterministic conversion latency also makes the part well suited to closed-loop control systems where predictable timing is required. When designing the input chain, place an RC anti-aliasing filter on each channel as close to the input pin as possible, and bypass the analog and digital supplies with 100 nF plus 10 uF ceramic capacitors. Drive the inputs through a low-impedance buffer if the source impedance exceeds 1 kohm to avoid conversion errors caused by incomplete settling of the internal S&H.
MAX1133BEAP+G077 - 16-Bit 200ksps SAR ADC, 5V | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1133BEAP+G077 is a 16-bit, 200 ksps successive-approximation analog-to-digital converter (SAR ADC) with an internal +4.096 V reference, operating from a single +5 V analog supply in a 20-pin SSOP package. The +G077 suffix denotes a specific custom reel/packaging variant supplied by Maxim/Analog Devices, while the underlying die and pinout are identical to the catalog MAX1133BEAP+. The device integrates an input scaling network, internal track-and-hold, and a serial interface that connects directly to SPI, QSPI, and MICROWIRE peripherals without glue logic. A successive-approximation ADC (SAR ADC) is a sampled-data converter that performs a binary search across an internal capacitive DAC to resolve each conversion in one cycle of the bit-clock. SAR ADCs are valued for their deterministic latency, lack of pipeline delay, and excellent DC accuracy, making them the preferred architecture for multiplexed data-acquisition systems, industrial-control front ends, and instrumentation where latency-free conversions matter. The MAX1133 family sits in the precision-industrial tier, offering 16-bit resolution at 200 ksps with an integrated reference to simplify board layout. Key features of the MAX1133BEAP include a maximum integral nonlinearity (INL) of ±1 LSB and differential non-linearity (DNL) of ±1 LSB (no missing codes), SINAD of 85 dB, signal-to-noise ratio (SNR) of 86 dB, and total harmonic distortion (THD) of -90 dB. The analog input accepts a true bipolar ±12 V or 0 to +12 V range thanks to an internal input scaling/level-shift network, while a unipolar 0 to +4.096 V input can also be applied directly. The device draws 7.5 mA during conversion and drops to a few microamps in shutdown, supporting low-duty-cycle multiplexing strategies. The MAX1133 is built on a CMOS SAR core with an integrated bandgap reference, calibration logic, and a high-impedance CMOS serial-output port. The 20-pin SSOP package offers a small footprint while keeping analog and digital grounds separated to reduce coupling noise from the serial interface into the analog input. The wide input range, internal reference, and serial interface make the part easy to integrate with modern microcontrollers and DSPs without external signal-conditioning circuitry. Typical applications include industrial process control, multi-channel data-acquisition cards, medical instrumentation, weigh scales, and loop-powered 4-20 mA sensor transmitters. When designing with the MAX1133BEAP, decouple AVDD and DVDD separately with 0.1 µF ceramic capacitors placed close to the pins, and provide a 10 µF bulk capacitor on AVDD. Route the analog input traces as guard-traced microstrip away from the serial clock and digital outputs, and place a small RC filter (typically 100 Ω and 10 nF) at AIN-ADC to limit out-of-band noise. Because the MAX1133 uses an internal reference, allow a 10 ms settling window after power-up before initiating conversions.
MAX1134BCAP+ - 16-Bit 150ksps ADC, 3.3V, SSOP-20 | Maxim
The Maxim Integrated (Analog Devices) MAX1134BCAP+ is a 16-bit, 150 ksps successive-approximation analog-to-digital converter (SAR ADC) with a single 3.3V supply input, housed in a 20-pin SSOP package. According to distributor listings, the part provides a 1-channel single-ended input, SPI/QSPI/MICROWIRE-compatible serial interface, integrated input scaling network, internal track/hold, and on-chip clock. The BiCMOS architecture achieves 150 ksps throughput at low power consumption suitable for portable and industrial data-acquisition systems. A SAR ADC is a successive-approximation-register analog-to-digital converter: it converts an analog input voltage into a digital code by performing one bit at a time using a comparator and a digital-to-analog converter (DAC) in a binary-search loop. In the broader component taxonomy, a SAR ADC sits under analog-to-digital converter -> data converter -> mixed-signal IC -> semiconductor. SAR ADCs are valued for deterministic latency, no-pipeline-delay behavior, and high DC accuracy, which makes them preferred over delta-sigma or pipeline ADCs in multiplexed channel-sampling and motor-control applications. The MAX1134BCAP+ integrates a track/hold amplifier, input scaling network, and clock generator, which eliminates the need for external components and reduces board area. The 150 ksps sampling rate combined with 16-bit resolution provides 91.3 dB theoretical dynamic range. The single 3.3V supply operation simplifies power-tree design in 3.3V-only systems, while the wide digital-interface compatibility (SPI, QSPI, MICROWIRE) allows direct connection to most microcontrollers and DSPs without glue logic. The MAX1134BCAP+ shares pinout and package with the MAX1135 family members, allowing designers to scale resolution (12/14/16-bit) and sample rate (150/200 ksps) using the same PCB footprint. The 20-pin SSOP (CAP suffix) is a 5.30 mm JEDEC standard body, while the 20-pin SSOP (EAP suffix) is a 7.20 mm JEDEC standard body - these are NOT drop-in compatible. Typical applications include portable instrumentation, data loggers, process-control front ends, pen-digitizer digitizers, and battery-powered measurement equipment. The wide operating temperature range suits industrial environments. When designing with this device, place the 0.1 uF decoupling capacitor within 3 mm of the AVDD pin and keep analog/digital ground returns separated until they join at the ADC. Source impedance should remain below the datasheet limit to maintain acquisition time.
MAX1138KEEE+ - 12-Channel 10-Bit SAR ADC, I2C, QSOP-16
The Analog Devices (formerly Maxim Integrated) MAX1138KEEE+ is a low-power, 10-bit, 12-channel successive-approximation analog-to-digital converter (SAR ADC) in a 16-pin QSOP package, operating from a single 2.7V to 3.6V or 4.5V to 5.5V supply. It integrates an internal track/hold, voltage reference, clock, and an I2C-compatible 2-wire serial interface supporting 400 kHz Fast Mode and 1.7 MHz High-Speed Mode operation. A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary search algorithm with an internal DAC and comparator to convert analog input voltages into digital codes within a single conversion cycle per bit. Within the broader hierarchy, the MAX1138KEEE+ is a multi-channel data converter -> ADC analog-to-digital converter -> data-acquisition IC -> mixed-signal semiconductor. Key differentiating features include 12 single-ended analog input channels (vs. 4 channels on the MAX1136), an internal 2.5V reference, software-configurable unipolar/bipolar inputs, and an automatic channel-scanning state machine that cycles through selected channels sequentially. The part also integrates an internal oscillator and programmable acquisition time, eliminating the need for an external clock source. Typical applications include portable data logging, patient monitoring, system supervision in embedded control, thermocouple/thermistor front-end digitisation, and battery-powered instrumentation where the small QSOP-16 footprint and low supply current (typically 200 µA at the lowest throughput) are decisive. The internal reference and track/hold simplify BOM cost and layout complexity. When designing with this device, ensure the SCL/SDA pull-ups follow I2C bus specifications (typically 4.7 kΩ at 3.3V for Fast Mode) and that the AIN inputs respect the absolute-maximum input range to avoid latch-up. For best noise performance, place 0.1 µF bypass capacitors directly at VDD and use the internal reference rather than an external source. This page synthesises distributor pricing, drop-in alternatives (including same-family Maxim parts and cross-brand ADI replacements), and practical design notes not found in the manufacturer datasheet alone.
MAX1138KEEE+T - 12-Ch 10-Bit I2C ADC, 5V | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX1138KEEE+T is a low-power, 10-bit, 12-channel analog-to-digital converter (ADC) with internal track-and-hold, voltage reference, clock, and an I2C-compatible 2-wire serial interface, housed in a 16-pin SSOP package. It operates from a single 4.5V to 5.5V supply, draws only 670 microA at the maximum sampling rate of 94.4 ksps, and supports both 400 kHz Fast Mode and 1.7 MHz High-Speed Mode I2C communication. The '+T' suffix indicates Tape-and-Reel packaging for high-volume SMT assembly. An ADC (analog-to-digital converter) is a semiconductor device that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Successive-approximation-register (SAR) ADCs such as the MAX1138 deliver deterministic latency, low power, and excellent DC accuracy, making them the workhorse for industrial sensor reading, battery monitoring, and instrumentation front-ends. The MAX1138 belongs to the broader SAR ADC > multi-channel data converter > signal chain IC > semiconductor hierarchy. Key features include 12 analog input channels (11 single-ended plus differential), an internal 2.5V reference, software-configurable unipolar/bipolar input ranges, an external reference option for ratiometric measurements, and a hardware/software shutdown mode that drops supply current to 1 microA. The 16-pin SSOP (K package) measures approximately 4.9 mm x 3.9 mm with a 0.635 mm pitch, suiting compact designs where board area is at a premium. The MAX1138 integrates track-and-hold, clock, and reference on-chip, eliminating external components and reducing BOM cost. Its I2C interface supports up to eight devices on a single bus via two address pins, simplifying multi-ADC systems. The wide 4.5V-5.5V supply range makes it directly compatible with 5V microcontrollers and legacy industrial rails. Typical applications include industrial sensor monitoring (temperature, pressure, strain gauge bridges), portable instrumentation, patient monitoring devices, data-acquisition systems, and battery-powered measurement equipment. The 12-channel count is well suited to multi-zone HVAC controllers, PLC analog modules, and embedded control boards where many sensors share one ADC. When designing with the MAX1138KEEE+T, ensure the I2C pull-up resistors match the bus speed - 4.7k for 400 kHz, 1k for 1.7 MHz High-Speed Mode. Add 0.1uF decoupling close to VDD and bypass the reference pin per the manufacturer datasheet. For highest absolute accuracy, use an external low-noise reference instead of the internal 2.5V bandgap. This page synthesizes distributor pricing, drop-in alternatives sourced from manufacturer parametric data, and practical design notes that go beyond a single-datasheet reading.
MAX1139KEEE+ - 10-Bit 12-Ch SAR ADC, I2C, 16-QSOP | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX1139KEEE+ is a low-power, 10-bit, 12-channel (6 differential), successive-approximation analog-to-digital converter (SAR ADC) with an I2C-compatible 2-wire serial interface, housed in a 16-pin QSOP package. It operates from a single 2.7V to 3.6V or 4.5V to 5.5V supply, includes an internal track/hold, internal 4.096V reference (K-grade), internal clock, and accepts analog inputs from 0 to VAVDD. The K-suffix variant indicates the higher 4.5V-5.5V supply option with 12 input channels. An SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary search algorithm through an internal capacitive DAC to convert an analog input to a digital code in N conversion cycles for N bits of resolution. SAR ADCs are prized for low power consumption, deterministic latency, and excellent DC accuracy, making them a cornerstone architecture for multi-channel data-acquisition systems, sensor monitoring, and industrial control loops where a single ADC must sequentially scan many analog signals. Key features of the MAX1139KEEE+ include 117ksps maximum sampling rate (K-grade), I2C-compatible 2-wire serial interface (Fast Mode 400kHz), six analog input channels configurable as 6 single-ended or 3 differential inputs (12 total input pins), internal 4.096V voltage reference (K/M variants), low 670µA supply current at maximum sampling rate, and 1µA power-down current. The wide supply range lets the same part serve both 3.3V and 5V digital systems without level shifters. The architecture combines an input track/hold, a 10-bit charge-redistribution DAC, a comparator, and an internal 4.096V bandgap reference. The I2C address is factory-set (with 16 possible addresses) and the device supports both Standard Mode (100kHz) and Fast Mode (400kHz). The QSOP-16 package has a thermal resistance of approximately 150°C/W and is specified for the -40°C to +85°C extended industrial temperature range. Typical applications include portable data logging, patient monitoring, battery-powered instrumentation, HVAC sensor arrays, and process control. The 12 single-ended / 6 differential input channels make the part especially attractive for scanning multi-sensor arrays (temperature, pressure, flow) with a single ADC. The internal reference eliminates external reference components, reducing BOM and PCB area. When designing with this ADC, place 0.1µF bypass capacitors close to VDD and VAVDD pins, and ensure the I2C pull-ups (typically 2.2kΩ-10kΩ) are sized for the bus capacitance. The analog input impedance is high (multiplexer-based) so source-impedance effects are minimal, but a low-impedance input driver is still recommended for best AC performance. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet. Pin-compatible 12-bit and 8-bit alternatives (MAX1239 and MAX1039 respectively) are documented in the alternatives section.
MAX1139MEEE+ - 10-Bit 12-Ch I2C SAR ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1139MEEE+ is a low-power, 10-bit, 12-channel (6 single-ended/6 differential) successive-approximation analog-to-digital converter with an internal track/hold, internal voltage reference, internal clock, and an I2C-compatible 2-wire serial interface, housed in a 16-pin QSOP package. An SAR (successive-approximation register) ADC is a precision data-converter architecture that performs a binary search across an internal capacitive DAC to produce a digital output in N conversion cycles for N bits of resolution. SAR ADCs occupy the middle ground between flash converters (fastest, lowest resolution) and sigma-delta converters (highest resolution, slower), combining moderate speed (tens to hundreds of ksps), deterministic latency, and low power consumption, making them the workhorse for multi-channel data acquisition, sensor interfacing, and industrial control. The MAX1139MEEE+ operates from a single 2.7V to 3.6V supply, draws only 670 µA at the maximum 94.4 ksps sampling rate, and supports an I2C-compatible 2-wire serial interface. Key features include 10-bit resolution, software-configurable unipolar/bipolar and single-ended/differential inputs, an internal 2.048V reference, and a hardware/software shutdown mode that reduces supply current to under 1 µA for battery-powered applications. The 16-QSOP package is pin-similar to the rest of the MAX1136-MAX1139 family, allowing PCB reuse across 3V/5V and 4/12-channel variants. The internal 2.048V reference and track/hold eliminate external analog components, simplifying BOM and saving board area. The 94.4 ksps throughput and I2C bus up to 400 kHz (Fast-Mode) suit the device for monitoring slow-to-medium-speed signals such as temperature, pressure, and battery cell voltages in portable, industrial, and medical instruments. Typical applications include portable data loggers, battery-pack monitoring, industrial process control loops, HVAC sensor interfaces, and patient-monitoring front ends where multiple low-bandwidth analog channels must be digitized with deterministic latency and minimal firmware overhead. When designing with this part, add 0.1 µF bypass capacitors close to AVDD and DVDD and respect the 400 kHz I2C bus-capacitance budget. Because the inputs are software-configurable, a single MAX1139MEEE+ can replace several discrete ADCs and an analog mux, reducing both footprint and firmware complexity. This page synthesizes distributor pricing, drop-in same-package alternatives, and design notes not found in the manufacturer datasheet to accelerate the engineer's selection and layout decisions.
MAX1139MEEE+T - 12-Ch 10-Bit SAR ADC I2C | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1139MEEE+T is a 10-bit, low-power, multi-channel successive-approximation analog-to-digital converter (SAR ADC) with 6/12 analog input channels and an I2C-compatible 2-wire serial interface, housed in a 16-pin QSOP package. It operates from a single 2.7V to 3.6V or 4.5V to 5.5V supply, integrates an internal track/hold, an internal 2.048V voltage reference (MAX1137/MAX1139 family), an internal oscillator, and an I2C serial interface in a single IC, drawing a low supply current suitable for battery-powered and portable systems. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary search algorithm against an internal precision DAC to convert an analog input voltage into a digital code, one bit per clock cycle. SAR ADCs occupy the middle ground between slow but precise integrating/delta-sigma ADCs and fast but power-hungry flash ADCs: they offer 8-18 bit resolution, moderate sampling rates (up to several MSPS), zero-latency single-shot conversion, and low power consumption. Within the broader data-converter hierarchy, the MAX1139 belongs to: SAR ADC -> ADC -> Data Converter -> Mixed-Signal IC -> Semiconductor. Key specifications include 10-bit resolution, 6 or 12 single-ended input channels (software-configurable via the setup byte), an internal 2.048V reference, an I2C-compatible 2-wire serial interface with up to 400 kHz fast-mode support, an integrated track/hold amplifier, and an internal clock. The device operates over the -40C to +85C extended industrial temperature range. The MAX1136-MAX1139 family offers pin-compatible 4-channel MAX1136/MAX1137 (8-pin uMAX) and 12-channel MAX1138/MAX1139 (16-pin QSOP) variants sharing the same register set and serial protocol, enabling drop-in migration between channel counts and reference voltages (2.048V vs 4.096V) on the same I2C bus. Typical applications include portable and battery-powered instrumentation, system monitoring in networking and server hardware, multi-cell battery monitoring, power-supply supervision, sensor signal conditioning, and consumer-electronics front panels. The internal reference and small QSOP footprint minimize external component count, and the I2C interface allows up to four devices on a single 2-wire bus by selecting different slave addresses via external address pins. When designing with this part, observe I2C bus pull-up sizing: with four MAX1139 devices on the bus, total sink current is 4 x 3 mA = 12 mA, which limits pull-up resistor values to keep rise time within the 400 kHz fast-mode budget. The internal reference eliminates an external component but limits absolute accuracy to the trimmed internal value - verify against system calibration requirements before committing to the internal reference option. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a consolidated engineering reference for the MAX1139MEEE+T.
MAX113CAG+TG068 - 8-Bit 400ksps 4-Ch ADC | Maxim
The Maxim MAX113CAG+TG068 is a +3V, 4-channel, 8-bit analog-to-digital converter (ADC) with 1 microampere power-down mode, delivered in a 24-pin SSOP (CAG) package and shipped on tape-and-reel with the +TG068 suffix. The device uses a half-flash conversion architecture to achieve a 1.8 microsecond conversion time, equivalent to a 400 ksps throughput, with an external reference. It is part of the MAX113/MAX117 family - the MAX113 offers 4 analog input channels while the MAX117 doubles that to 8 channels - and is designed for direct connection to microprocessors with mode-selectable read/write timing. An 8-bit ADC (analog-to-digital converter) is a data-acquisition IC that converts continuous analog input voltages into discrete 8-bit digital codes with 256 quantization levels, providing 48 dB of theoretical dynamic range. In the system hierarchy, the MAX113 sits under Data Acquisition -> Converter -> ADC -> Mixed-Signal IC. Half-flash (also called sub-ranging flash) architectures use two 4-bit flash sections and one DAC per conversion step to halve the comparator count versus a full flash design - this reduces die area and power consumption while still reaching 400 ksps, the practical speed boundary for parallel-output ADCs of this generation. Key features include single +3V supply operation, four single-ended analog inputs with channel selection, a hardware power-down pin that drops quiescent current to 1 microampere between conversions, and microprocessor-compatible interface logic. The half-flash engine delivers 8 bits of resolution at 400 ksps, suitable for system-monitoring loops, transducer digitizers, and portable instrumentation front-ends where low power and small PCB area matter more than 12-16 bit precision. The half-flash core samples an input through two 4-bit flash stages back-to-back. The first stage determines the four most-significant bits and computes a 4-bit residue using an internal DAC; the second stage resolves the four least-significant bits from that residue. This two-step technique halves the comparator count from 255 to about 32, lowering both silicon cost and switching noise - the trade-off is one extra clock cycle of latency per conversion, which is invisible to most microcontrollers polling the parallel data bus. Typical applications include handheld multimeter digitizers, portable industrial sensor front-ends, battery-powered data loggers, panel-meter readouts, and microprocessor-based control boards where multiple analog transducer signals must be read sequentially. The 1 microampere power-down current is specifically valuable for battery-management and IoT-sensor designs that wake the ADC only on demand. When designing with this IC, place the 0.1 microfarad VDD bypass capacitor within 5 mm of the VDD pin and keep the analog input traces short and guarded to ground. The MODE pin selects the read/write bus protocol - tie it high for memory-mapped interface or low for I/O-mapped interface - so make this decision before laying out the microcontroller bus. Do not leave the reference input floating; use a low-impedance reference such as a MAX6129 or a buffered +2.5V source for specified accuracy. This page synthesizes distributor pricing, drop-in same-package alternatives, pin-by-pin comparison, and practical design notes not collected in the manufacturer datasheet, helping engineers pick a replacement or verify second-source options without rereading twenty years of Maxim product change notices.
MAX113EAG+TG068 - 8-Bit 400ksps 4-Ch ADC | Maxim
The Maxim Integrated MAX113EAG+TG068 (now part of Analog Devices) is a +3V, 400 ksps, 4-channel, 8-bit analog-to-digital converter (ADC) in a 24-pin SSOP package. It features a 1.8 microsecond conversion time using a half-flash architecture and a 1 microampere power-down mode for battery-sensitive applications. Operating from a single +3V supply, the device provides four single-ended analog input channels with microprocessor-compatible parallel interface. An ADC (Analog-to-Digital Converter) is a data-acquisition integrated circuit that converts continuous analog voltage signals into discrete digital codes. ADCs are a subset of data converters, which also include DACs (digital-to-analog). The half-flash (or sub-ranging flash) architecture used by the MAX113 family combines two flash converters and a DAC to achieve 8-bit resolution with fewer comparators than a pure flash design, reducing power consumption and die area. The MAX113EAG+TG068 belongs to the MAX113 product family alongside the MAX117 8-channel variant. Key features include 400 ksps throughput, 1.8 microsecond conversion time, 1 microampere power-down current, single +3V operation, and four single-ended analog inputs. The MAX113EAG+TG068 ships in tape-and-reel packaging with the +TG068 suffix indicating specific reel and packaging orientation. The 24-pin SSOP provides a compact surface-mount footprint suitable for high-density data-acquisition designs. Typical applications include portable and battery-powered instrumentation, digital signal processing front ends, multiplexing data-acquisition systems, and embedded industrial control. The 1 microampere power-down current makes the device particularly suitable for handheld meters and remote sensor nodes where quiescent draw directly affects battery life. The half-flash architecture delivers 8-bit resolution at sample rates suitable for audio-bandwidth signals and many sensor measurement applications. When designing with this ADC, ensure the analog input signal bandwidth is below the Nyquist limit for the selected sample rate, and add a low-pass anti-aliasing filter ahead of each input. Decouple AVDD with 0.1 microfarad ceramic and 10 microfarad tantalum capacitors placed close to the supply pin to minimize digital switching noise coupling into the analog front end. The power-down pin should be tied to logic-high only during active conversion windows to maximize battery life in portable designs. According to the Maxim datasheet, the +TG068 suffix is a packaging code that does not affect electrical specifications. This page synthesizes distributor pricing, drop-in tape-and-reel and tube equivalents, and practical design notes not found in the manufacturer datasheet, providing a consolidated decision guide for engineers evaluating 8-bit SAR-style half-flash ADCs in the SSOP-24 footprint.
MAX113ENG - 8-Bit 4-Ch 400ksps ADC 1µA Power-Down | Maxim Integrated
The Maxim Integrated MAX113ENG (now ADI) is a microprocessor-compatible 8-bit analog-to-digital converter with 4 single-ended input channels, offered in a 24-pin PDIP through-hole package. It operates from a single +3V supply and uses a half-flash conversion technique to achieve 1.8 µs conversion time (400 ksps throughput), with an active-low PWRDN pin that drops quiescent current to a typical 1 µA for battery-powered designs. What is an 8-bit half-flash ADC? A half-flash ADC is a type of analog-to-digital converter that uses two parallel 4-bit flash stages plus a digital-to-analog converter (DAC) and subtractor to perform an 8-bit conversion in roughly two comparator bank cycles, achieving tens to hundreds of ns per stage. Positioned in the taxonomy: ADC > data converter > signal chain IC > semiconductor, the half-flash architecture is the same family used by the MAX113's companion MAX117 (8-channel variant) and is well suited for embedded microcontrollers, data loggers, and instrumentation front-ends where medium-speed, low-power conversion is required and 12-16 bit precision is not necessary. Key features include a parallel microprocessor interface, single-ended analog inputs with external reference, software-configurable unipolar/bipolar input range, and an analog input bandwidth suitable for audio-bandwidth signals. A hardware power-down pin reduces standby current to 1 µA typical, allowing the ADC to be duty-cycled in battery-powered applications. The 24-pin PDIP package provides easy insertion into through-hole prototypes and educational platforms. The MAX113ENG uses two stacked 4-bit flash ADC sub-blocks plus an internal 4-bit DAC, achieving a total throughput of 400 ksps at 1.8 µs per conversion. The internal track/hold keeps input bandwidth compatible with audio-range multiplexed sources, and the external reference voltage scales the full-scale input range independently of the supply, simplifying ratiometric measurements. Typical applications include portable data loggers, battery-powered instrumentation, digital panel meters, simple DSP front-ends, and embedded 8-bit MCU analog input modules where a true 12-bit ADC is overkill but a discrete CMOS comparator ladder is too slow. Because of its 24-pin DIP form factor and 3V supply, it is a popular choice for hobbyist and educational hardware. Designers should add 100 nF decoupling capacitors directly across the VDD and AGND pins and use the PWRDN pin to manage average supply current in duty-cycled systems. The external reference determines absolute accuracy, so a low-drift, low-noise reference such as the MAX6125 or MAX6190 is recommended for instrumentation-grade measurements. This page synthesizes distributor pricing, drop-in alternatives (MAX113CNG, MAX113CAG, MAX113EAG, MAX113PNG, MAX117), and practical design notes not found in the manufacturer datasheet alone.
MAX1142BCAP+ - 14-Bit 200ksps ADC, +5V, 20-SSOP | Maxim Integrated
The Maxim Integrated MAX1142BCAP+ is a 14-bit, 200 ksps successive-approximation analog-to-digital converter (ADC) with a +5V single supply and an internal +4.096V reference, housed in a 20-pin SSOP package. The device features one single-ended analog input channel and a serial interface compatible with SPI/QSPI/MICROWIRE, eliminating the need for external logic. Its combination of an input scaling network, internal track/hold, on-chip clock, and integrated reference reduces total BOM cost and board area for compact data-acquisition designs. An ADC (analog-to-digital converter) is a semiconductor device that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Successive-approximation-register (SAR) ADCs use a binary-search algorithm with an internal DAC to resolve N bits in N clock cycles, achieving an excellent balance of speed, resolution, and power consumption. Within the broader taxonomy, SAR ADCs sit between flash converters (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, slowest), and they are a key sub-category of mixed-signal data converters used across industrial, instrumentation, and embedded systems. Key specifications of the MAX1142BCAP+ include 200 ksps sampling rate, 14-bit resolution (no missing codes), ±1 LSB INL (B-grade), an internal +4.096V reference, and 1 input channel. Power-supply requirements are +5V single-ended analog supply and +5V digital supply. The integrated +4.096V reference is convenient because 4.096V is exactly 1 mV per LSB, simplifying engineering-unit scaling. The wide input scaling network (via external resistor network) supports input ranges up to ±4A in current-sensing applications. The MAX1142BCAP+ uses a charge-redistribution DAC with a precision bandgap reference, achieving low noise and high DC accuracy. The serial interface uses SPI/QSPI/MICROWIRE protocols, allowing direct connection to most microcontrollers and DSPs. An external reference can override the internal +4.096V reference when higher accuracy or a different full-scale range is required. Typical applications include industrial process control and instrumentation, temperature and pressure monitoring with bridge sensors, current sensing in motor control, battery-powered data loggers, and patient monitoring. The wide input range makes it particularly attractive for ±4A current shunt monitoring and ±10V industrial signal conditioning. When designing with the MAX1142BCAP+, ensure adequate input scaling to match full-scale range, and provide proper decoupling at AVDD and DVDD pins. The internal reference requires a stable supply; for noisy environments, add a 0.1uF ceramic bypass capacitor adjacent to the REF pin to minimize reference-induced conversion noise. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet, providing a single reference for engineers evaluating or sourcing the MAX1142BCAP+.
MAX1145BEAP+ - 14-Bit 150ksps 3.3V SAR ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1145BEAP+ is a 14-bit, single-input, successive-approximation-register (SAR) analog-to-digital converter with a maximum sampling rate of 150 ksps, operating from a single 3.135 V to 3.465 V supply. Housed in a 20-pin SSOP package with an external reference input, this converter targets low-power precision data-acquisition front ends where a small footprint, simple serial interface, and deterministic latency of a SAR architecture are required. A Successive Approximation Register (SAR) ADC is a class of Nyquist-rate converter that performs a binary search across the analog input range using an internal DAC and comparator, producing one conversion result per N clock cycles. SAR ADCs offer deterministic conversion latency, no pipeline delay, inherently zero-latency single-shot sampling, and excellent DC accuracy. They sit between flash converters (fastest, lowest resolution) and sigma-delta converters (highest resolution, lowest bandwidth) in the data-converter hierarchy. Key specifications of the MAX1145BEAP+ include 14-bit resolution, single-ended analog input, SPI-compatible serial interface, and an external reference. The part is specified over the industrial temperature range and is offered in a 20-pin SSOP. The integrated track/hold and internal oscillator simplify external component count, while the shutdown mode reduces supply current for power-constrained or battery-operated applications. The architecture is built on a charge-redistribution DAC array combined with a precision comparator and SAR control logic. The 3.3 V single-supply operation simplifies power-tree design in 3.3 V digital systems, eliminating the need for level shifters. The wide input bandwidth of the front-end sample-and-hold supports accurate sampling of input signals well beyond the Nyquist frequency when an external antialiasing filter is applied. Typical applications include industrial process-control loops, portable instrumentation, data loggers, and sensor-signal conditioning where a single-ended input feeds a microcontroller or DSP via SPI. The external reference input allows the system designer to choose reference voltage for optimum dynamic range and ratio-metric measurements. When designing with this part, add a 0.1 uF ceramic bypass capacitor as close as possible to the supply pin and ensure the analog and digital ground returns share a single star-ground point. The shutdown pin can be asserted between conversions to reduce power consumption in low-duty-cycle applications. Refer to the manufacturer datasheet for full timing diagrams and reference-circuit recommendations. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-ready reference for selecting and sourcing the MAX1145BEAP+.
MAX1147BEUP+T - 14-Bit 4Ch 116ksps 3.3V Precision ADC | Maxim
The Maxim Integrated MAX1147BEUP+T is a low-power, 14-bit, multichannel, successive-approximation analog-to-digital converter (ADC) with an internal track/hold (T/H), internal voltage reference, and internal clock. It provides 4 single-ended or 2 true-differential analog input channels, a 3-wire serial interface, and a maximum sampling rate of 116 ksps. The device operates from a single +2.7V to +3.6V supply, drawing 0.6 mA at 116 ksps. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary-search algorithm and an internal DAC to resolve analog inputs. SAR ADCs sit within the broader hierarchy of data converters (ADC -> data converter -> mixed-signal IC -> semiconductor) and are valued for their deterministic latency, low power consumption, and inherent simplicity compared to delta-sigma or pipeline architectures. The MAX1147 family (MAX1146/MAX1147/MAX1148/MAX1149) shares a common 20-pin TSSOP pinout, with supply-voltage and channel-count differences distinguishing the variants. Key features of the MAX1147BEUP+T include ±1 LSB INL and DNL, an internal +2.5V reference (or optional external reference), a hardware-/software-/external-clock shutdown mode that reduces supply current to sub-microampere levels, and an SPI/QSPI/MICROWIRE-compatible serial interface. Its 20-pin TSSOP package, surface-mount gull-wing terminals, and industrial temperature grade (-40C to +85C) suit it for compact, cost-sensitive precision-instrumentation boards. Typical applications include portable data logging, patient monitoring, factory-automation sensor interfaces, pen-digitizer digitizers, and 4–20 mA loop-powered instruments. Designers should consider shutdown-mode current when budgeting battery life, and ensure the analog inputs remain within the supply rails to avoid linearity degradation.
MAX1153BEUE+W - 10-Bit, 10-Ch System Monitor ADC | Maxim
The Maxim Integrated (Analog Devices) MAX1153BEUE+W is a 10-bit, 10-channel (8 external + 2 internal) system-monitor ADC with an internal temperature sensor and VDD monitor, housed in a 16-pin TSSOP package. According to the MAX1153 datasheet family, it provides up to 94 kSPS throughput and accepts single-ended or differential analog inputs through an SPI/QSPI/MICROWIRE-compatible serial interface. The +W suffix indicates RoHS-compliant lead-free construction supplied on tape-and-reel. What is a system-monitor ADC? A system-monitor ADC is a mixed-signal data acquisition IC that combines a multi-channel analog-to-digital converter with on-chip housekeeping functions such as temperature sensing, supply monitoring, and a dedicated input for the analog supply rail. These devices sit at the top of the power-management IC hierarchy and the broader mixed-signal data acquisition family, used in place of standalone ADCs plus separate temperature sensors to reduce BOM count and free up host-controller analog pins. Key features 10-bit resolution (no missing codes), an internal 2.5 V reference, low +4.5 V to +5.5 V single-supply operation, software-configurable unipolar/bipolar input ranges, an internal temperature sensor with ±3 °C accuracy, and a hardware-/software-programmable channel-scan sequencer. The TSSOP-16 package provides a compact footprint suitable for dense system monitor boards. Architecturally, the MAX1153BEUE+W uses a successive-approximation-register (SAR) core with an input multiplexer, sample-and-hold, and reference buffer; the two internal channels continuously digitize the local die temperature and the analog VDD rail, freeing all eight external analog inputs for system voltages such as battery stacks, current-sense amplifiers, thermistor bridges, and transducer outputs. Typical applications include battery-pack monitoring and protection in portable equipment, rack-mounted server and telecom base-station health monitoring, industrial PLC analog front-ends, HVAC controllers, and any multi-rail system requiring on-board temperature telemetry. Because the part combines ADC, temperature, and supply monitoring in one chip, it is widely used to replace three or four discrete components in space-constrained designs. When designing with this part, select input ranges to match the transducer full-scale outputs and ensure the supply decoupling network follows the datasheet recommended capacitor combination. Consider the worst-case cumulative unadjusted error when budgeting system accuracy. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX1154AEUE+T - 10-Ch 10-Bit System Monitor ADC | Maxim Integrated
The Maxim Integrated MAX1154AEUE+T is a stand-alone, 10-channel (8 external + 2 internal) 10-bit system-monitor ADC with internal temperature sensor and VDD monitor, housed in a 16-pin TSSOP package. It supports a single-ended analog input range of 0 to VDD and operates from a 2.7V to 5.25V analog supply, consuming only 5 mW (1.7 mA at 3V) at the maximum 94 ksps sampling rate. A system monitor IC (also called a hardware monitor, supervisory ADC, or housekeeping ADC) integrates multi-channel analog-to-digital conversion, temperature sensing, and supply-voltage monitoring into a single chip, reducing external component count versus a discrete ADC plus dedicated temperature sensor design. The MAX1153/MAX1154 family belongs to the Maxim system-monitor hierarchy: SAR ADC -> multi-channel ADC -> system monitor -> supervisory IC -> power management IC. This category of ICs is widely used to monitor processor core voltage, battery stacks, and PCB hot-spots in single-rail systems. Key features of the MAX1154AEUE+T include AutoShutdown (reducing supply current to 190 uA at 2 ksps and to less than 8 uA at 50 sps), an SPI/QSPI/MICROWIRE-compatible serial interface, a dedicated ALERT output for out-of-threshold interrupts, and an on-chip 2.5V reference. Internal channels measure the device's own die temperature and VDD, while the eight external analog inputs accept voltages up to VREF. The architecture combines a 10-bit successive-approximation register (SAR) ADC, a 10-channel analog multiplexer, a bandgap temperature sensor, and an internal reference. AutoShutdown mode and burst-mode sampling enable unattended, low-duty-cycle monitoring that is ideal for battery-powered equipment. The 10-bit resolution provides 0.1% full-scale measurement steps, sufficient for system telemetry but not for high-precision instrumentation. Typical applications include multichannel system monitoring in telecom equipment, temperature and voltage monitoring in industrial controllers, fan-speed and thermal monitoring in servers, battery-cell voltage monitoring in portable devices, and hardware housekeeping functions in embedded designs. The wide 2.7V-5.25V supply range supports both 3.3V and 5V digital rails. When designing with the MAX1154AEUE+T, ensure that the analog input voltage on any external channel stays within 0V to VREF, and place a 0.1 uF decoupling capacitor close to the VDD pin. Configure the ALERT threshold via the SMBus-compatible threshold registers so that the host is notified when any monitored channel exceeds its window. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone. Specifications below are sourced from Maxim's MAX1153/MAX1154 datasheet and current distributor listings as of 2026-10-14.
MAX1156AEUP+ - 14-Bit 135ksps Single-Supply ADC | Maxim Integrated
The Maxim Integrated MAX1156AEUP+ is a 14-bit, 135 ksps, low-power, single-supply successive-approximation analog-to-digital converter (ADC) featuring automatic power-down, a factory-trimmed internal clock, and a bipolar analog input range, housed in a 20-pin TSSOP package. Operating from a single +4.75V to +5.25V analog supply, the device delivers true 14-bit resolution with no missing codes and supports input signals from 0 to +4.096V (unipolar) or ±4.096V (bipolar) when driven through the dedicated bipolar input path. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples a continuous-time analog signal and quantizes each sample into a binary code for digital processing. Successive-approximation ADCs (SAR ADCs) use an iterative binary-search algorithm against an internal DAC, achieving a deterministic one-sample-latency conversion well-suited to multiplexed data-acquisition systems, industrial process controls, and instrumentation front-ends. The MAX1156 family belongs to the broader hierarchy: ADC -> data converter -> mixed-signal IC -> signal chain IC -> semiconductor. Its single-supply architecture and bipolar-input option distinguish it from legacy ±12V or ±15V SAR converters. Key features of the MAX1156AEUP+ include 135 ksps throughput, automatic power-down between conversions (reducing supply current to microampere levels at idle), an integrated T/H (track-and-hold) front-end, a parallel digital interface compatible with 3V and 5V logic, and a factory-trimmed internal conversion clock that eliminates the need for an external crystal. The device draws approximately 1.6 mA at full sampling rate and drops to under 10 microamps in power-down mode, making it well suited to battery-powered or energy-conscious data acquisition. Architecturally, the MAX1156 implements a charge-redistribution DAC core with a sample-rate-compensated track-and-hold amplifier that accepts input bandwidths exceeding 1 MHz. The bipolar-input topology scales and level-shifts a differential ±4.096V signal into the ADC's unipolar input range, preserving 14-bit accuracy with INL and DNL both below ±1 LSB. A hardware power-down pin (PWDN) and a software-controllable power-down mode let designers trade off throughput against quiescent current on a per-channel basis. Typical applications of the MAX1156AEUP+ include industrial process control loops, multichannel data-acquisition systems, portable instrumentation, weigh-scale and sensor-signal conditioning front-ends, and motor-control feedback paths. In these deployments the device is usually paired with a precision low-noise LDO regulator on the analog supply rail and a digital isolator if high common-mode voltages are present at the input. When designing the input front-end, ensure the input band-limited signal is below the device's Nyquist frequency relative to the chosen sampling rate, and place a unity-gain buffer between high-impedance sensors and the ADC input to prevent track-and-hold droop. Decouple AVDD with a 10 microfarad tantalum in parallel with a 0.1 microfarat ceramic placed within 5 mm of the supply pin. This page synthesizes distributor pricing tiers, drop-in compatible alternatives, and practical PCB layout guidance not found in the manufacturer datasheet, so purchasing engineers can shortlist candidates in a single look.
MAX1156AEUP+T - 14-Bit 135ksps Bipolar ADC | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1156AEUP+T is a 14-bit, 135 ksps, low-power, successive-approximation analog-to-digital converter (ADC) with a bipolar analog input range of 0V to 10V (true bipolar) and a single 4.2V supply, housed in a 20-pin TSSOP package. This industrial-temperature ADC delivers ±1 LSB INL (typical) and accepts pseudo-differential inputs with a wide 0V-10V input range, plus automatic power-down to reduce current draw between conversions. The MAX1156AEUP+T integrates a factory-trimmed internal clock, simplifying board layout and reducing BOM cost by eliminating an external oscillator. What is a successive-approximation ADC? A SAR ADC is a sampling converter that uses a binary-search algorithm through an internal DAC to resolve each conversion in N clock cycles, where N is the resolution (14 here). SAR ADCs sit between pipeline and delta-sigma architectures: they offer low latency, deterministic throughput, and zero digital-noise feedback into the input, making them ideal for multiplexed data-acquisition and control loops. Compared with flash ADCs they scale efficiently to higher resolutions; compared with sigma-delta ADCs they skip digital decimation delays. Key specifications include 135 ksps sampling rate, 14-bit resolution, single 4.2V analog supply, 0V-10V bipolar analog input range, automatic power-down between conversions to 0.1 µA, parallel digital interface, and industrial -40°C to +85°C temperature range. The wide bipolar input range is achieved using a true bipolar input stage that handles signals that swing through 0V without requiring a negative supply rail. Architecturally, the MAX1156AEUP+T pairs an input protection/level shifter with a charge-redistribution SAR core, a precision reference (internal or external depending on variant), and a parallel output latch. The 135 ksps throughput, 14-bit resolution, and 0V-10V bipolar input combination target multi-channel data-acquisition front-ends where the input multiplexer can swing through ground. Industrial-grade temperature range and TSSOP-20 footprint ease migration from older bipolar-input ADCs such as the AD7891. Typical applications include process-control analog input modules, industrial PLC data acquisition, factory sensor signal conditioning, medical patient monitoring front-ends, instrumentation panel meters, and multi-channel multiplexed data-acquisition boards. The internal clock and 0V-10V bipolar input range particularly suit mixed-signal industrial backplanes. When laying out this part, place the 10µF bulk bypass and 0.1µF decoupling capacitors as close as possible to the AVDD pin, and keep the digital outputs physically separated from the analog input trace to avoid digital feedthrough into the conversion result. Input RC filtering is recommended when the source impedance exceeds 1 kΩ. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes sourced from Maxim's ADC datasheet family - information not consolidated on any single distributor page.
MAX1156BEUP+ - 14-Bit 135ksps Bipolar ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1156BEUP+ is a 14-bit, 135ksps, single-supply successive-approximation analog-to-digital converter (SAR ADC) with a bipolar analog input range of 0V to 10V (unipolar) and true bipolar ±5V or ±10V operation, housed in a 20-pin TSSOP package. The MAX1156 is part of the MAX1156/MAX1158/MAX1174 family of low-power ADCs designed for industrial process control, data acquisition, and instrumentation applications requiring precision measurement of high-voltage bipolar signals. A successive-approximation ADC (SAR ADC) is a type of analog-to-digital converter that uses a binary search algorithm through an internal comparator and DAC network to digitize an analog input signal. SAR ADCs offer an excellent balance of speed, resolution, and power consumption: they require no pipeline delay, provide deterministic latency, and typically consume only a few milliwatts of power. Within the broader hierarchy of data converters, the MAX1156 sits in the SAR ADC category, which itself belongs to the data acquisition IC family and ultimately the power management and mixed-signal semiconductor ecosystem. Key features include true bipolar input ranges without external signal-shaping circuitry, 135 ksps sampling rate, integrated 4.096V internal reference (MAX1156), low power consumption of typically 6 mA at 135 ksps, automatic power-down between conversions reducing supply current to 1 µA, hardware-configurable analog input ranges (0 to 5V, 0 to 10V, ±5V, ±10V), and a high-speed SPI/QSPI/MICROWIRE-compatible serial interface. The device operates from a single +5V analog supply and a +3V to +5V digital supply, simplifying peripheral power management design. The MAX1156BEUP+ uses a charge-balancing successive-approximation architecture with an input protection network and a track-and-hold block, allowing the ADC to directly accept industrial-level bipolar voltages that would otherwise require external op-amps. The internal 4.096V reference (MAX1156EUP variant) eliminates the need for an external reference component, reducing BOM cost and PCB area while maintaining ±1 LSB INL and ±1 LSB missing-code performance. Typical applications include industrial process control and PLC analog front ends, data acquisition systems and PC-based measurement cards, medical instrumentation (patient monitoring, blood analysis), and portable or battery-powered instrumentation requiring low quiescent current. The bipolar input range makes the MAX1156 particularly suited for measuring transducer outputs such as strain gauges, load cells, and pressure sensors that natively produce bipolar signals. When designing with the MAX1156, allocate at least 10 nF of bypass capacitance on AVDD and DVDD placed within 5 mm of the package, and reserve PCB space for an optional input RC filter (typically 1 kΩ + 100 pF) to limit broadband noise from the sensor. The MAX1156 is pin-compatible with the MAX1158 (unipolar-only) and MAX1174 (12-bit), enabling a single PCB layout to support different precision/speed grades.
MAX115CAX - 12-Bit 2x4-Channel Simultaneous-Sampling ADC | Maxim
The Maxim Integrated MAX115CAX (now under Analog Devices) is a high-speed, multi-channel, 12-bit data-acquisition system (DAS) with simultaneous track/hold (T/H) amplifiers, packaged in a 36-pin SSOP. It integrates four simultaneous-sampling T/Hs with two multiplexed inputs each (eight single-ended inputs total), a 2us successive-approximation ADC, a +2.5V internal reference, and a buffered reference input that preserves the relative phase information of the sampled signals for powerline monitoring and three-phase motor control. A Data Acquisition System (DAS) is an integrated analog front-end that combines signal conditioning, multiplexing, sample-and-hold, and analog-to-digital conversion on a single IC, sitting hierarchically as: ADC -> data converter -> data acquisition IC -> signal chain -> mixed-signal subsystem. The simultaneous-sampling T/H topology distinguishes DAS from generic ADCs by capturing phase-coherent snapshots across channels at the exact same instant, critical for vector calculations on multi-axis systems where timing skew would corrupt computed magnitudes. Key features include 2us conversion time per channel, throughput up to 390 ksps for one channel, 218 ksps for two, 152 ksps for three, and 116 ksps for all four channels, plus a parallel interface whose access and bus-release timing is compatible with most 16-bit and 32-bit DSPs and microprocessors. Per-channel programmable gain and bipolar input ranges (driven by the +2.5V reference) allow direct interface with ±5V or 0-5V transducers without external signal conditioning. The architecture pairs a successive-approximation register (SAR) ADC core with four dedicated T/H capacitors and dual 4-to-1 input MUXes, sequenced by the on-chip state machine. The internal +2.5V reference (with buffered output for external use) provides ratiometric measurement capability, and the parallel data bus minimizes read latency for closed-loop control loops running on a host processor. Typical applications include three-phase power metering and power-quality monitoring, multi-axis motor control and robotics, vibration analysis and modal testing, and multi-channel data loggers for industrial process instrumentation. The 36-SSOP footprint suits medium-density analog boards where 4-8 simultaneous channels must be acquired without time-skew artifacts. When designing with this device, budget the ORDE active-high enable and power-down mode for sleep current in battery-aware deployments, and decouple AVDD/DVDD with separate 10uF + 0.1uF pairs as close to the pins as possible. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.