ADC/DAC
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MAX11164ETC+T - 16-Bit 500ksps SAR ADC, 5ppm/°C Internal Ref | Maxim
The Maxim Integrated MAX11164ETC+T is a 16-bit, 500 ksps successive-approximation-register (SAR) analog-to-digital converter with a 0 V to 5 V unipolar input range, integrated 5 ppm/°C reference, and housed in a 12-pin TDFN (3x3 mm) package. According to the Maxim datasheet, the part delivers 16-bit no-missing-codes performance, an SNR of 92 dB and a true-signal-chain AC performance at 500 ksps throughput without requiring pipeline delay or latency. An SAR ADC is a successive-approximation-register analog-to-digital converter that resolves one bit per clock cycle by comparing the sampled input against a binary-weighted internal DAC. SAR ADCs combine deterministic latency (a single conversion cycle) with low power consumption and excellent DC accuracy, which is why they dominate precision industrial, instrumentation, and motor-control signal chains where both throughput and AC performance matter. Key features include an internal 4.096 V low-drift reference (5 ppm/°C max), a high-impedance input that does not require an external buffer, an SPI-/QSPI-/MICROWIRE-compatible serial interface, and an external REF input option. The TDFN-12 3x3 mm package combines low thermal resistance with a small PCB footprint, while the part operates over the -40 °C to +85 °C industrial temperature range. The MAX11164ETC+T architecture is built around a charge-distribution capacitive DAC, an on-chip low-drift bandgap reference, and a high-speed comparator, with input signal acquisition and conversion phases gated by an external CNVST. The integrated reference and input scaling network accept true bipolar or unipolar signals up to ±5 V when driven through the REF pin, simplifying front-end signal conditioning. Typical applications include industrial process control and PLC analog input modules, multi-channel data-acquisition systems, weigh scales, battery-powered instrumentation, and portable measurement front ends. The internal reference and small footprint also suit it to factory-automation loop calibrators and medical sensor signal chains. When designing with this device, place the 10 µF reference bypass capacitor as close as possible to pin 6 (REF) and the 0.1 µF VDD bypass cap at pin 12 to keep digital switching transients out of the analog input path. Choosing the -T suffix (tape-and-reel) versus the standard +T extension affects packaging only - both share the same 12-pin TDFN footprint. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Maxim datasheet.
MAX11166ETC+T - 16-Bit 500ksps SAR ADC ±5V Bipolar Input | Maxim
The Maxim Integrated MAX11166ETC+T is a 16-bit, 500ksps successive-approximation (SAR) analog-to-digital converter with a true bipolar ±5V (10VP-P) input range, internal 4.096V reference, and 12-pin TDFN (3x3 mm) package. According to the Analog Devices / Maxim Integrated datasheet, the device operates from a single 5V analog supply and provides genuine bipolar input sampling without external front-end signal conditioning, making it well suited for industrial process control and instrumentation that digitize ±10V or 4-20mA-derived signals. What is a SAR ADC: A successive-approximation register ADC is a class of Nyquist-rate data converter that resolves one bit per internal clock cycle using a binary search across an internal capacitive DAC. SAR ADCs offer deterministic latency, no pipeline delay, excellent DC accuracy, and low power consumption compared to pipeline or delta-sigma architectures, making them the architecture of choice for multiplexed data acquisition, motor control feedback loops, and precision instrumentation. The MAX11166ETC+T achieves 16-bit resolution with no missing codes, integrated an optional internal reference that eliminates an external reference IC, and a patented charge-pump input stage that allows direct sampling of high-impedance sources. AC performance includes better than 92 dB SNR and -100 dB THD at 10kHz input, while DC performance delivers ±1 LSB INL and ±0.5 LSB DNL typical. The device also includes a high-speed SPI-/QSPI-/MICROWIRE-compatible serial interface for direct connection to microcontrollers and DSPs. Typical applications include industrial process control (4-20mA loop digitization), vibration and acoustic analysis, multichannel data acquisition systems, medical instrumentation, and automated test equipment. The true bipolar input eliminates the need for level-shifting amplifiers and anti-alias filters, reducing BOM cost and PCB area in space-constrained designs. When designing with the MAX11166ETC+T, place the 0.1µF and 10µF decoupling capacitors as close as possible to the AVDD pin and connect the exposed pad to a solid analog ground plane. Use the internal reference for compact designs, or disable REF and apply an external reference for higher accuracy or ratiometric measurements.
MAX1116EKA-T - 8-Bit 100kSPS SAR ADC SOT-23-8 | Maxim Integrated
The Maxim Integrated MAX1116EKA-T is a single-supply, low-power, 8-bit, 100 kSPS successive-approximation analog-to-digital converter (ADC) housed in an 8-pin SOT-23 package with a footprint roughly 30% of an 8-pin SO. It operates from a single +4.5V to +5.5V supply (the MAX1115 variant covers +2.7V to +5.5V), draws only 175 µA at 100 kSPS, and integrates the track-and-hold, voltage reference, VDD monitor, clock, and a MICROWIRE/QSPI/SPI-compatible serial interface. A successive-approximation ADC is a type of data converter that uses a binary-search algorithm against an internal precision DAC to digitize an analog input in N clock cycles for N bits of resolution. SAR ADCs are prized for their deterministic latency, single-shot conversion capability, and absence of pipeline delay, making them the architecture of choice for multiplexed data-acquisition systems, sensor front-ends, and process-control loops where deterministic timing is required. Key features include 8-bit resolution with no missing codes, an internal 2.048 V reference, an analog input range of 0 V to VREF (unipolar), a high-impedance analog input, and a hardware-/software-programmable power-down mode that drops quiescent current to <1 µA between conversions for battery-powered duty-cycled applications. The MAX1116EKA-T uses Maxim's low-leakage CMOS SAR core with an internal charge-redistribution DAC and on-chip bandgap reference, eliminating the need for external reference components in cost-sensitive designs. The serial interface supports SPI, QSPI, and MICROWIRE hosts, allowing direct connection to most modern microcontrollers and DSPs without glue logic. Typical applications include 4 mA to 20 mA loop-powered remote data-acquisition systems, battery-powered test equipment, low-power handheld portable devices, receive signal-strength indicators (RSSI) in radios, and general system-diagnostics monitoring. The wide operating temperature range of -40 °C to +85 °C makes it suitable for industrial-grade portable instruments. Provide a high-side LDO to power the converter when used on a 4 mA to 20 mA loop. When designing with this part, place a 10 nF bypass capacitor as close as possible to VDD to keep digital switching noise out of the reference, and ensure the analog input source bandwidth matches the acquisition time (typically 625 ns at 100 kSPS) to avoid code-edge errors. The reference decoupling must be sized for the conversion clock; see the datasheet typical application circuit. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX1119EKA-T - 8-Bit 100ksps 2-Ch SAR ADC, SOT-23-8 | Maxim
The Maxim Integrated (Analog Devices) MAX1119EKA-T is a single-supply, low-power, 2-channel, 8-bit successive-approximation analog-to-digital converter (ADC) housed in an 8-pin SOT-23 package. It features 100 ksps sampling, an internal +4.096 V reference (MAX1119), internal track/hold, and an SPI/QSPI/MICROWIRE-compatible serial interface, with an operating supply range of +4.5 V to +5.5 V. A successive-approximation register (SAR) ADC is a type of data converter that performs a binary search on the input voltage using an internal comparator and digital-to-analog converter (DAC). SAR ADCs are valued for their deterministic latency, low power, and excellent behavior around DC inputs, making them a common choice for multiplexed sensor reading, industrial control loops, and battery monitoring where switching-regulator noise from delta-sigma or pipelined converters is undesirable. The MAX1119 sits in the broader hierarchy: ADC -> data converter -> data acquisition IC -> signal chain -> mixed-signal semiconductor. Key differentiating features include the industry's lowest power consumption among 8-bit SAR ADCs in this package (135 µA at 100 ksps), an internal 4.096 V reference that simplifies external BOM, automatic power-down between conversions, and a true 2-channel single-ended input mux. The internal track/hold operates up to 100 kHz input bandwidth, and the SPI/QSPI/MICROWIRE-compatible serial interface connects directly to most embedded microcontrollers without glue logic. Architecturally, the MAX1119 uses a capacitive-charge-distribution SAR core with an on-chip bandgap-derived reference buffer. The BiCMOS process enables low active current while still supporting 100 ksps conversion rates, and the automatic shutdown between conversions drops quiescent current to sub-µA levels for battery-powered duty-cycled sampling. Typical applications include portable data logging, 4-20 mA loop sensor digitization, HVAC thermistor reading, battery fuel gauging, and panel-meter front-ends. The wide supply range and small SOT-23 footprint also suit space-constrained industrial instrumentation. When designing with this part, place the 0.1 µF VDD bypass capacitor within 5 mm of the supply pin and ensure CS, SCLK, and DOUT traces are kept short to avoid digital coupling into the analog inputs. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the bare manufacturer datasheet.
MAX111ACAP+ - 14-Bit 2-Ch Sigma-Delta Serial ADC | Maxim
The Maxim Integrated MAX111ACAP+ is a low-cost, 2-channel, 14-bit sigma-delta analog-to-digital converter (ADC) with a serial interface, offered in a 20-pin SSOP (CAP) package. It accepts bipolar input ranges and operates from a single 5V analog supply, integrating an input multiplexer, on-chip auto-calibration, and a sigma-delta modulator followed by a digital filter on a single die. The device targets cost-sensitive precision measurement front ends that demand 14-bit resolution without the complexity of separate signal-conditioning stages. A sigma-delta ADC converts an analog input by oversampling the signal with a high-frequency modulator and then low-pass filtering the resulting bitstream to produce a high-resolution, low-noise digital word. In the broader component hierarchy, sigma-delta ADCs sit between successive-approximation register (SAR) ADCs and integrating ADCs - they trade absolute input bandwidth for high effective resolution and excellent noise rejection. This category belongs to data-conversion ICs, a subset of data acquisition semiconductors that bridge analog sensors and digital microcontrollers or DSPs. Key features of the MAX111ACAP+ include 14-bit resolution (with ±1 LSB INL and no missing codes), ±5V or 0V-to-5V bipolar/uni-polar input ranges, two differential input channels selected via an internal multiplexer, automatic calibration that removes offset and gain errors at power-up or on demand, and a simple 3-wire serial interface (SPI/QSPI/MICROWIRE-compatible) for connection to microcontrollers. The sigma-delta architecture yields inherent digital filtering of wideband noise and excellent 50Hz/60Hz power-line rejection, which is critical in industrial and instrumentation designs. Typical applications are weigh scales, portable instrumentation, temperature measurement with bridge or thermocouple sensors, process-control analog front ends, and panel meters. The MAX111ACAP+ suits any 14-bit, single-supply 5V system that needs a small-footprint, low-cost, dual-channel ADC with on-chip calibration and minimal external parts. When designing with the MAX111ACAP+, observe the recommended decoupling capacitor placement and reference layout - a clean external voltage reference and proper grounding are essential to realize the data-sheet noise and INL performance. The serial-interface timing must also respect the tCONV and tACQ limits; over-clocking the SCLK beyond the maximum 4.8 MHz degrades conversion accuracy. This page synthesizes distributor pricing, drop-in alternative recommendations, and practical design notes that complement (rather than duplicate) the official Maxim datasheet.
MAX111AEWE+T - 14-Bit 2-Ch Delta-Sigma Serial ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX111AEWE+T is a low-cost, 2-channel, +/-14-bit serial-output delta-sigma analog-to-digital converter (ADC) housed in a 16-pin wide-body SOIC (WSOIC) package with tape and reel packaging. It integrates two differential input channels, an internal auto-calibration engine, and a synchronous serial interface, enabling 14-bit effective resolution plus overrange without any external components. A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution at lower sample rates. In the broader signal-chain hierarchy, the delta-sigma ADC sits between successive-approximation (SAR) and dual-slope converters for high-resolution, low-bandwidth applications, and is widely chosen for sensor instrumentation, weigh scales, panel meters, and process control loops where a clean differential front end and digital simplicity matter more than raw speed. Key features of the MAX111AEWE+T include +/-14-bit resolution, two differential analog input channels, a maximum sample rate of 50 samples per second (50 sps), an operating supply current of only 550 uA, and an external or system-clock serial interface. The wide operating supply range of +/-5V (analog) and +5V (digital) plus an industrial temperature range of -40C to +85C make it well suited to factory and process control environments where noise immunity and stable temperature behavior are mandatory. The internal auto-calibration engine compensates offset and gain on demand, eliminating the need for external reference or trim components while still delivering 14-bit performance. The synchronous serial interface streams MSB-first conversion data and accepts an external clock, simplifying hookup to most microcontroller SPI ports without external logic, level shifters, or isolation buffers. Typical applications for the MAX111AEWE+T include weigh scales and load-cell digitizers, industrial pressure and temperature transmitters, panel meters, strain-gauge front ends, and 4-20 mA loop-powered smart sensors. The combination of true differential inputs, low quiescent current, and 2-wire serial output lets designers build isolated, low-power signal-conditioning modules that rail-power from the same loop supply used to drive the field wiring. Designers should place a 0.1 uF decoupling capacitor as close as possible to each supply pin, keep analog and digital grounds star-connected at the ADC ground pin, and keep digital clock traces away from the differential analog traces. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer datasheet or distributor product page, giving engineers the context needed to select and qualify the MAX111AEWE+T with confidence.
MAX111BEAP+ - 14-Bit 2-Ch Sigma-Delta ADC, Serial | Maxim Integrated
The Maxim Integrated MAX111BEAP+ is a low-cost, 2-channel, ±14-bit serial-output sigma-delta analog-to-digital converter (ADC) housed in a 20-pin SSOP package. It uses an internal auto-calibration technique to achieve 14-bit resolution plus overrange with no external components required, and its serial interface simplifies connection to microcontrollers and DSPs. The supply current is only 550 µA in normal operation and drops to 4 µA in power-down mode, making it attractive for power-sensitive designs. The 2-channel differential input architecture supports direct connection to bridge sensors, thermocouples, and other low-frequency analog sources. A sigma-delta ADC is a type of oversampling converter that uses a high-frequency modulator and digital filtering to achieve high resolution from low-precision analog components. Compared to successive-approximation register (SAR) ADCs, sigma-delta parts trade absolute sample rate for excellent noise immunity and inherent digital averaging, which makes them ideal for precision DC and low-bandwidth measurements in instrumentation, industrial control, and sensor signal-chain applications. The MAX111 sits within the broader hierarchy of ADC > data converter > signal-chain IC > analog semiconductor. Key specifications of the MAX111BEAP+ include ±14-bit resolution (with sign bit + overrange), 2 differential input channels, an integral nonlinearity (INL) of ±2 LSB max, and a typical signal-to-noise plus distortion ratio (SINAD) above 78 dB. It accepts bipolar input ranges configured via external resistors and operates from a single +5V analog supply with a separate digital supply pin for mixed-voltage systems. The 3-wire serial interface is compatible with SPI, QSPI, and MICROWIRE protocols. The internal modulator runs at a high oversampling ratio and is followed by a digital decimation filter, which suppresses wideband noise and provides 50 Hz/60 Hz mains-rejection at the appropriate output word rate. Calibration registers correct offset and gain error on demand, eliminating the need for trimming potentiometers on the PCB. The reference input accepts an external 2.5 V to 5 V source, and the on-chip reference buffer drives the modulator directly. Typical applications include load-cell scales and weighing systems, pressure and strain-gauge instrumentation, industrial process control loops, portable battery-powered meters, temperature measurement using thermocouples or RTDs, and 4 mA to 20 mA current-loop digitizers in factory automation. The wide dynamic range and built-in calibration simplify designs that previously required precision analog front-end components. When designing with this ADC, pay attention to input common-mode voltage and the analog/digital supply decoupling network. Place 0.1 µF ceramic bypass capacitors as close as possible to the AVDD and DVDD pins, and use a low-impedance ground plane to keep digital switching noise out of the analog modulator. Because the device operates from a single +5 V supply, level shifting may be required when interfacing to 3.3 V microcontrollers; in those cases, a small series resistor on DOUT often suffices. This page synthesizes distributor pricing, drop-in same-package alternatives, design considerations, and application guidance in one place to help engineers evaluate the MAX111BEAP+ without cross-referencing multiple datasheets.
MAX1121EGK+ - 8-Bit 250Msps ADC with LVDS Outputs | Maxim
The Analog Devices (formerly Maxim Integrated) MAX1121EGK+ is a monolithic 8-bit, 250Msps analog-to-digital converter (ADC) optimized for outstanding dynamic performance at high intermediate frequencies up to 500 MHz, housed in a 68-pin QFN (10x10 mm) package with exposed thermal pad. It operates from a single 1.8V supply, draws approximately 410 mW, and delivers LVDS-compatible outputs that ease routing into FPGAs and high-speed ASICs. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog waveform and converts each sample into a discrete digital code. Pipelined ADCs, like the MAX1121, use a cascade of low-resolution stages and digital error correction to achieve very high sampling rates (hundreds of Msps) while keeping power dissipation reasonable. Within the power management and signal chain hierarchy, this part sits at: ADC -> data converter -> mixed-signal IC -> semiconductor IC. Key features include a guaranteed 250 Msps conversion rate, 1.8V single supply operation, internal bandgap reference, parallel LVDS outputs, a flexible input stage optimized for high-IF undersampling up to 500 MHz, and low spurious content for wideband applications. The wide input bandwidth allows direct sampling of IF signals in software-defined radio and cable infrastructure, eliminating downconversion stages. The pipelined architecture provides 1.2 GHz analog input bandwidth, an SINAD of approximately 49 dB at 100 MHz input, and excellent spurious-free dynamic range (SFDR) suitable for multi-carrier receivers. On-chip clock duty-cycle correction and LVDS timing alignment reduce FPGA capture complexity. Typical applications include cable modem downstream receivers, digital predistortion feedback paths in wireless base stations, handheld spectrum analyzers and test equipment, and high-IF undersampling in software-defined radio (SDR) platforms where wide bandwidth and low power matter. When designing with this ADC, follow the reference layout in the manufacturer datasheet, keep analog and LVDS return paths separated, and provide a clean low-noise clock to achieve the rated SNR. Decoupling must include 0.1 uF and 10 uF ceramic capacitors close to each supply pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX1121EGK+TD - 250Msps 8-Bit ADC, LVDS, QFN-68 | Maxim
The Maxim Integrated (now Analog Devices) MAX1121EGK+TD is a 1.8V, 8-bit, 250 Msps analog-to-digital converter (ADC) with LVDS outputs for wideband applications. Housed in a 68-pin QFN-EP package (10 mm x 10 mm, 0.9 mm height, MO-220, package code G6800-4), this pipelined ADC is optimized for outstanding dynamic performance and operates from a single 1.8V analog supply with separate digital output supply, drawing approximately 250 mW at full speed. An ADC is a data converter that translates continuous analog signals into discrete digital codes for downstream DSP, storage, or transmission. The 8-bit, 250 Msps class sits in the converter hierarchy between general-purpose successive-approximation ADCs (<= 1 Msps) and high-resolution pipelined ADCs (>= 14 bits). Pipelined ADCs use multiple low-resolution flash stages per clock cycle to achieve very high sampling rates while keeping per-stage power dissipation low - the MAX1121's pipeline architecture delivers 250 Msps with 1.8V operation, a balance targeting wideband IF sampling rather than instrumentation precision. Key features include an input bandwidth above 400 MHz, a signal-to-noise-plus-distortion ratio (SINAD) above 46 dB at 100 MHz input, an effective number of bits (ENOB) above 7.2 bits, and LVDS-compatible digital outputs that ease interfacing with FPGAs and dedicated clock-data-recovery (CDR) blocks. The 68-pin QFN-EP package provides an exposed thermal pad for low junction-to-PCB thermal resistance, which is critical at 250 Msps full-speed operation. Differential analog and clock inputs reject common-mode noise and support direct-coupled IF sampling without baluns in many layouts. The MAX1121 uses a proprietary multi-stage pipeline with on-chip track-and-hold, internal reference, and output data serializers. The chip provides separate analog (AVDD) and digital output (OVDD) supplies to isolate switching noise from sensitive analog inputs - a common technique in high-speed ADC design. The LVDS interface reduces EMI and enables longer board traces to the receiver ASIC or FPGA at hundreds of MHz parallel rates. Typical applications include digital predistortion (DPD) feedback paths in cellular base-station power amplifiers, IF sampling for software-defined radios and radar receivers, medical ultrasound beamformers, cable infrastructure digitizers, and test-and-measurement digitizers. The 8-bit resolution is well matched to DPD loops that only require accurate amplitude/phase estimation rather than full signal reconstruction. When designing with this device, allocate substantial ground plane area under the exposed pad and use solid via stitching between the analog and digital domains. Keep analog and clock traces length-matched within a few hundred mils. Maintain the AVDD/OVDD split with separate decoupling networks and verify that downstream LVDS receivers operate within their common-mode range. This page synthesizes current distributor pricing, parametric drop-in alternatives, application notes, and PCB layout guidance that complement the manufacturer datasheet.
MAX11291ENX+CGQ - 24-bit 6ch Sigma-Delta ADC, 100dB SNR | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX11291ENX+CGQ is a 24-bit, 6-channel, ultra-low-power sigma-delta analog-to-digital converter (ADC) with 100 dB SNR at 60 Hz, 17.5 kHz maximum bandwidth, and 2.7V-3.6V AVDD supply, housed in a 36-pin WLP package. The converter integrates six differential or 12 single-ended input channels, an on-chip clock generator, and a flexible SPI-compatible serial interface, simplifying multi-channel data-acquisition front ends. A sigma-delta ADC is a type of oversampling converter that uses a high-frequency modulator and digital decimation filter to achieve very high resolution (commonly 16-24 bits) at the cost of input bandwidth. In the hierarchy of data-converter ICs, sigma-delta ADCs sit alongside SAR (successive-approximation) and pipeline ADCs, favored for precision DC and low-frequency measurement where noise rejection and linearity matter more than speed. The MAX11291 belongs to Maxim's low-power precision ADC family, targeting portable, industrial, and sensor-conditioning applications where SNR per milliwatt is critical. Key differentiating features include 100 dB SNR at 60 Hz with 17.5 kHz bandwidth, 2.5 kHz fully integrated conversion, ultra-low 1.4 mA typical supply current, integrated low-drift reference and PGAs with up to 32x gain, and built-in temperature sensor. The device offers simultaneous 50 Hz and 60 Hz line-rejection at 60 Hz data rate, ensuring clean readings in industrial environments. Internally, the device pairs a fourth-order modulator with a SINC1 + SINC3 selectable digital filter, configurable through the SPI interface for trade-offs between resolution and settling time. The WLP-36 (Wafer-Level Package, 3.5x3.5 mm, 0.4 mm pitch) provides minimal PCB footprint for space-constrained wearables and IoT edge nodes. AEC-Q100 qualification is NOT confirmed in verified sources. Typical applications include 4-20 mA loop-powered industrial sensors, RTD and thermocouple temperature acquisition, weigh scales and load-cell signal conditioning, portable medical monitoring, smart sensor hubs, and battery-powered IoT edge nodes. When designing with this device, allocate at least 100 nF of ceramic decoupling on AVDD and DVDD within 2 mm of the supply pins, and guard-ring the analog inputs on the top layer to minimize leakage from digital switching. Calibration cycles every 100 ms are recommended for absolute-accuracy applications. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX11321ATJ+T - 12-Bit 1Msps SAR ADC, 16-Ch, TQFN-32 | Maxim
The Maxim Integrated (now Analog Devices) MAX11321ATJ+T is a 12-bit, 1Msps successive-approximation (SAR) analog-to-digital converter with 16 analog input channels and an external reference, housed in a 32-pin TQFN-EP (5x5 mm) package. According to the manufacturer datasheet, the device is part of the MAX11321-MAX11328 family of pin-compatible 12-/10-bit, 4-/8-/16-channel ADCs with 1Msps sampling, 1MHz full linear bandwidth, and serial SPI/QSPI/MICROWIRE-compatible output. The "+T" suffix denotes tape-and-reel packaging, while the "ATJ" suffix designates the 32-pin TQFN with exposed pad. A SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that performs a binary search through an internal DAC to determine the digital output code, one bit per conversion clock. SAR ADCs offer deterministic latency, low power consumption, and excellent DC accuracy, making them the architecture of choice for multiplexed data-acquisition systems, industrial sensor interfaces, and motor-control feedback loops where fast channel switching and precise single-shot conversions are required. Key features include a 1Msps throughput, 12-bit resolution with no missing codes, an internal 4.096V reference (or external reference option), a low-noise input signal conditioner in front of the analog multiplexer, and a wide analog input range of 0V to VREF. The MAX11321ATJ+T achieves >70dB SINAD and ±1 LSB INL/DNL at the rated throughput. The serial interface operates with clock frequencies up to ~24MHz and supports daisy-chaining of multiple ADCs. Architecturally, the MAX11321ATJ+T integrates an input-bandwidth-limiting pre-amplifier per channel, a high-impedance input multiplexer, a track-and-hold, a charge-redistribution SAR core, and a precision reference buffer. The post-mux signal-conditioning access pins let designers insert external filters or gain stages between the multiplexer and the ADC core, which is unusual in this class of converter and greatly simplifies multi-channel signal chains. Typical applications include 4-20mA industrial sensor acquisition, motor-drive phase-current sensing, multi-zone temperature monitoring, PLC analog input modules, and optical module monitoring. Designers also use this ADC in medical instrumentation front-ends and battery-management systems where high channel count and small PCB footprint are mandatory. When designing with this ADC, note the 32-pin TQFN package has an exposed thermal pad that MUST be soldered to the PCB ground plane for proper operation and thermal dissipation. The input multiplexer requires a settling time of about 200ns after each channel switch for full 12-bit accuracy, so engineers should insert a short software delay before triggering each conversion. The external reference input has a high impedance of about 25kohm, so a low-noise reference IC and a 10uF/0.1uF bypass are strongly recommended. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Specifications below are sourced from the manufacturer datasheet and DigiKey/Mouser listings as of 2026-10-14.
MAX11324ATJ+T - 10-Bit 1Msps SAR ADC, 8-Ch | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX11324ATJ+T is a 10-bit, 1Msps, 8-channel successive-approximation-register (SAR) analog-to-digital converter housed in a 32-pin TQFN (5x5 mm) package with exposed pad. Operating from a single 2.35V to 3.6V analog supply, it delivers up to 1Msps throughput while consuming only 5.6 mW at full speed, and includes an external reference input, 1MHz full-linear-bandwidth input mux, and a SPI/QSPI/MICROWIRE-compatible serial interface. An SAR ADC is a successive-approximation-register analog-to-digital converter that performs a binary search against a reference voltage to resolve each conversion in N clock cycles, where N is the resolution in bits. SAR ADCs offer deterministic latency, no pipeline delay, and excellent dynamic performance at moderate sample rates, occupying the engineering niche between precision slow-sampling delta-sigma ADCs and high-speed pipeline ADCs. They are widely used in industrial process control, motor control, and multi-channel data-acquisition systems where low-latency deterministic sampling of multiple analog signals is required. The MAX11324 belongs to the broader category hierarchy: SAR ADC -> data converter -> ADC -> signal chain IC -> mixed-signal semiconductor. Key features of the MAX11324ATJ+T include a 10-bit resolution (10-bit accuracy grade in the MAX11321-MAX11328 family), 1Msps maximum sample rate, 8 single-ended analog input channels, an integrated 8-to-1 input multiplexer with post-mux external signal-conditioning access, 1MHz full-linear-bandwidth track-and-hold, single 2.35V to 3.6V analog supply, an external reference input (REF) for design-driven full-scale range, an SPI/QSPI/MICROWIRE serial interface, low 5.6 mW power consumption at 1Msps, and an automatic channel-scan mode with internal averaging. The post-mux access to each analog input is a distinguishing feature that allows per-channel external amplifiers, filters, or attenuation networks to be inserted without disturbing the mux or track-and-hold. The MAX11324ATJ+T uses a charge-redistribution DAC architecture with internal capacitors and an external reference, achieving INL of ±1 LSB (max), SNR of 61 dB (typ at 1Msps), and SINAD of 60 dB. The TQFN-32 package with exposed thermal pad (EP) provides a thermal resistance (theta_JA) suitable for operation across the -40C to +125C automotive temperature range. The device supports 0 to n x VREF input ranges when used with the internal PGA in adjacent family members, but here operates in single-ended unipolar mode against the external reference. Typical applications include industrial process-control analog input modules, multi-channel sensor data acquisition, motor-control current/voltage monitoring, PLC analog input cards, battery-management telemetry, programmable logic controller (PLC) front-ends, and automotive sensor-cluster digitizers. The 8-channel single-ended input count, 1Msps sample rate, and small TQFN-32 footprint make it ideal for space-constrained multi-channel designs. A key design consideration is decoupling: place a 10uF bulk plus 0.1uF ceramic bypass close to AVDD and DVDD pins, keep the analog and digital ground planes joined at a single point, and route the REF bypass (4.7uF) directly to the EP ground. Use short, symmetrical traces on the analog inputs to minimize channel-to-channel crosstalk. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, application notes, and practical design guidance for the MAX11324ATJ+T - content not found in the standalone manufacturer datasheet.
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.