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Produtos (39.000+)

MAX1228ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim
MAX1228ACEP+T

MAX1228ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim

The Maxim Integrated MAX1228ACEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (ADC) with a 6/12-channel analog multiplexer, internal 4.096 V reference, internal temperature sensor (±1°C accuracy), and a 16-entry first-in/first-out (FIFO) buffer, packaged in a 20-pin QSOP (SSOP). It accepts single-ended analog inputs across a -12 V to +12 V true bipolar input range (software configurable), making it suitable for industrial sensor interfaces, process-control loops, and battery-monitoring systems. An SAR ADC is a type of analog-to-digital converter that uses a charge-redistribution DAC and a comparator to resolve one bit per clock cycle, achieving deterministic latency and low pipeline delay. Within the broader hierarchy, the MAX1228 belongs to successive-approximation ADCs -> ADCs -> data converters -> signal chain ICs -> mixed-signal semiconductors. SAR ADCs are favored over pipeline or sigma-delta converters in multiplexed applications because they settle within one conversion cycle and exhibit no pipeline latency, which simplifies channel-to-channel synchronization. Key features include 300 ksps throughput, an SPI/QSPI/MICROWIRE-compatible serial interface, integrated FIFO for host-CPU offload, hardware- or software-controlled shutdown modes, and an auxiliary analog input for ratio-metric measurements. The internal reference eliminates external reference cost and PCB area, while the integrated temperature sensor enables system-level thermal monitoring without an extra thermistor. Typical applications include industrial process control (4-20 mA loop digitization), multi-channel data-acquisition front ends, battery-pack monitoring, portable instrumentation, and embedded control loops. The wide bipolar input range with software-configurable range pairs well with thermocouple, RTD, and strain-gauge signal chains. Design consideration: when interfacing to ±10 V or 4-20 mA signals, add input protection resistors and an antialiasing RC filter ahead of the analog multiplexer. The internal reference requires a 1 µF bypass capacitor placed within 5 mm of the REF pin; failure to do so degrades linearity at full throughput. This page synthesizes cross-brand drop-in alternatives, parametric comparison, and practical design notes not found in the manufacturer datasheet alone.

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MAX1228AEEP+ - 12-Bit 300ksps 12-Ch ADC w/ FIFO & Temp | Maxim
MAX1228AEEP+

MAX1228AEEP+ - 12-Bit 300ksps 12-Ch ADC w/ FIFO & Temp | Maxim

The Maxim Integrated MAX1228AEEP+ is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (ADC) with 6 or 12 analog input channels, an internal 4.096V reference, an internal temperature sensor (±1°C accuracy), and a 16-entry first-in/first-out (FIFO) buffer, housed in a 20-pin QSOP package. It operates from a single 5V analog supply (4.75V to 5.25V) and supports a separate 2.7V to VDD digital supply for flexible logic-level interfacing. What is an SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-conversion architecture that uses an internal comparator, a DAC, and a register to binary-search the input voltage over N clock cycles for an N-bit result. SAR ADCs offer an excellent balance of speed, resolution, and power consumption, making them the dominant choice for multiplexed multi-channel data-acquisition systems in industrial control, instrumentation, and sensor monitoring. Key features of the MAX1228AEEP+ include a true-differential analog multiplexer with bipolar input modes (±VREF/2, ±VREF, 0 to VREF), 16-entry FIFO for reduced host-processor overhead, scan-mode automatic channel sequencing, an SPI/QSPI/MICROWIRE-compatible serial interface, and a dedicated REF pin for an optional external reference. The internal reference settles quickly and offers ±2 LBP (least-significant-bit) initial accuracy at 25°C, supporting 12-bit performance without external precision components. The MAX1228AEEP+ integrates signal conditioning and conversion on a single die: a track/hold amplifier, the SAR engine, the reference, the FIFO, and a bandgap temperature sensor. This integration reduces board space and BOM cost in multi-channel systems while keeping digital noise isolated from the analog supply via separate AVDD/DVDD pins. Typical applications include process-control data acquisition, HVAC and building-automation sensor monitoring, medical instrumentation, weigh scales, 4-20 mA loop monitoring, and portable or rack-mounted industrial instruments requiring 12-bit precision across multiple analog sensor channels plus onboard temperature compensation. Designers should observe star-ground separation between AVDD and DVDD, place the 10 µF bypass and 0.1 µF decoupling within 5 mm of the supply pins, and use the FIFO to relax timing on burst-mode conversions. The internal reference can be overdriven by an external reference for ratiometric measurements with bridge sensors. This page synthesizes verified distributor pricing and stock, drop-in alternative recommendations, and practical design notes not duplicated in the manufacturer datasheet.

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MAX1228AEEP+T - 12-Bit 300ksps ADC, 12Ch SAR | Maxim Integrated
MAX1228AEEP+T

MAX1228AEEP+T - 12-Bit 300ksps ADC, 12Ch SAR | Maxim Integrated

The Analog Devices (formerly Maxim Integrated) MAX1228AEEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter with 12 input channels, an internal 4.096V reference, an internal temperature sensor, and a 16-entry FIFO, housed in a 20-pin QSOP package. The serial-interface ADC operates from a +5V analog supply and a +1.8V to +5.25V digital supply, drawing only a few milliamps in normal operation. A successive-approximation ADC is a sampled-data converter that uses an internal DAC and comparator to perform a binary search over 12 clock cycles, producing an exact 12-bit code for each conversion. This architecture combines the speed advantage of flash-style sampling with the small die area of integrating converters, making SAR ADCs the dominant choice for multiplexed data-acquisition systems, industrial control loops, and embedded instrumentation. Within the converter hierarchy, the MAX1228 belongs to the precision low-power SAR family, the category that sits between high-speed pipeline ADCs (used in oscilloscopes and software-defined radios) and low-speed delta-sigma converters (used in weigh scales and temperature loggers). Key features of the MAX1228 include 12 analog input channels plus two additional channels dedicated to the internal temperature sensor and the supply monitor, an integrated ±1 C accuracy temperature sensor suitable for system health monitoring, an internal FIFO that allows the host to sleep while up to 16 conversions accumulate, and true-differential track-and-hold inputs that reject common-mode noise from industrial bus signals. The part provides a standard SPI/QSPI/MICROWIRE-compatible serial interface, supports a programmable scan mode that sequences channels automatically, and includes user-configurable analog input protection to ±12V. Internally, the device uses a charge-redistribution DAC architecture with an on-chip 4.096 V buried-zener reference and a high-bandwidth track/hold; the converter achieves 70 dB SINAD and better than ±1 LSB INL/DNL at full speed. Its low-latency serial output and small package make it well suited for board-level data acquisition where board real estate and host processor overhead are limited. Typical applications include industrial process control and loop monitoring, multi-zone temperature scanning for HVAC and server rooms, portable and battery-powered instrumentation, and rack-mounted data-acquisition front ends where the on-board FIFO offloads timing-critical service routines from the main CPU. When designing with this ADC, bypass both the analog VDD and digital VDD pins with 0.1 F and 10 F ceramic capacitors placed within a few millimeters of the package, and keep analog and digital grounds separated until they join at a single star point under the IC. The MAX1228 requires a minimum of 8 analog inputs to be configured for valid scan mode operation; unused inputs should be tied to AVDD/2 through a 10 k resistor to minimize leakage-induced distortion. This page synthesizes distributor pricing (as of 2026-10-14), drop-in alternatives sourced from Maxim/Analog Devices and cross-reference web data, and practical design notes not found in the manufacturer datasheet alone.

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MAX1228BEEP+TG002 - 12-Bit 300ksps ADC with FIFO | Analog Devices
MAX1228BEEP+TG002

MAX1228BEEP+TG002 - 12-Bit 300ksps ADC with FIFO | Analog Devices

The Analog Devices (formerly Maxim Integrated) MAX1228BEEP+TG002 is a 12-bit, 300 ksps, low-power, serial-output, multichannel analog-to-digital converter (ADC) with integrated temperature sensor and internal reference, housed in a 20-pin QSOP package. The part features on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown to reduce supply current between conversions, making it well suited to battery-powered data acquisition systems. The TG002 suffix denotes the tape-and-reel packaging variant from the MAX1226/MAX1228/MAX1230 family. A successive-approximation-register (SAR) ADC is a converter topology that uses a binary-weighted capacitor network and a comparator to digitize an analog input in N clock cycles for an N-bit result. SAR ADCs are valued for their deterministic latency, lack of pipeline delay, and excellent DC accuracy - properties that make them ideal for multiplexed multi-channel applications, precision sensor readout, and industrial process control where a known sampling instant matters. Key features include 12-bit resolution, 300 ksps sampling rate, internal 4.096 V reference, internal temperature sensor with -40C to +85C operating range, 6- or 12-channel single-ended or differential input multiplexer, on-chip FIFO for up to 16 conversions, AutoShutdown mode that drops supply current to under 1 microampere between samples, and a 20 MHz SPI/QSPI/MICROWIRE-compatible serial interface. The 20-pin QSOP footprint occupies 5.0 mm x 5.6 mm of board area for compact front-end modules. The MAX1228 uses a charge-redistribution SAR core with input track-and-hold, with the analog inputs overdriven-tolerant to the supply rails. The internal reference is trimmed to within 1 percent accuracy and supports ratiometric measurements using an external REF. An internal temperature sensor exploits the proportional-to-absolute-temperature behavior of a bipolar transistor junction, allowing the host to perform cold-junction compensation or thermal monitoring with the same ADC front-end. Typical applications include 4-20 mA industrial loop transmitters, multi-zone temperature monitoring, portable data loggers, PLC analog input modules, and medical patient-monitoring front ends. The internal FIFO eases host processor burden in real-time control loops. When designing with this ADC, observe the input RC network recommended in the datasheet and place the 1 nF CIN and 10 nF REF bypass capacitors within 5 mm of their respective pins to preserve AC performance. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not found in the bare manufacturer datasheet.

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MAX1229ACEP+ - 12-Bit 300ksps 12-Ch SAR ADC | Maxim Integrated
MAX1229ACEP+

MAX1229ACEP+ - 12-Bit 300ksps 12-Ch SAR ADC | Maxim Integrated

The Maxim Integrated MAX1229ACEP+ is a 12-bit, 300 ksps, 12-channel successive-approximation analog-to-digital converter (SAR ADC) with an internal reference, internal temperature sensor, and a built-in FIFO, housed in a 20-pin QSOP package. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm combined with an internal DAC to convert an input voltage into a digital code. SAR ADCs are favored for medium-resolution, high-throughput, low-latency conversions because every conversion completes in a fixed number of clock cycles with no pipeline delay. Within the broader signal-chain hierarchy, the MAX1229 sits at the conversion stage between analog front ends (amplifiers, multiplexers, sensors) and digital processors (MCUs, FPGAs, DSPs), and it belongs to Maxim's MAX1227/MAX1229/MAX1231 family of multi-channel precision converters. Key specifications include 12-bit resolution, 12 analog input channels (6 in differential mode), a 300 ksps maximum sampling rate, an internal 4.096 V reference, an internal temperature sensor with ±1 °C accuracy, and a 25-sample FIFO that offloads interrupt service on the host. The serial interface is SPI/QSPI/MICROWIRE-compatible, which simplifies connection to most microcontrollers and DSPs. An integrated 16-channel analog input mux allows direct connection to a bank of sensors without external switching. Architecturally, the device pairs a charge-redistribution DAC with a precision comparator and on-chip calibration logic, allowing the converter to deliver 12-bit linearity without external trimming. The internal reference is factory-trimmed for low drift, and the wide 2.7 V to 3.6 V analog/digital supply range supports single-rail 3.3 V systems as well as battery-powered designs. Typical applications include industrial data acquisition, multi-sensor monitoring boards, patient-monitoring front ends, and portable instrumentation that benefits from the integrated FIFO and temperature sensor. Engineers choose this part when they need to scan multiple analog channels quickly while keeping the host MCU free for higher-level tasks. A practical design consideration is that the analog input signals must be referenced to the same ground as the AGND pin, and decoupling must be placed close to AVDN and DVDD pins to keep the internal reference stable under load. Use the FIFO depth to buffer burst conversions, allowing the host to sleep between conversions and reduce average power.

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MAX1229ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim
MAX1229ACEP+T

MAX1229ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim

The Maxim Integrated MAX1229ACEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter with 6-/12-channel input mux, on-chip FIFO, internal temperature sensor and internal reference, offered in a 20-pin QSOP (also designated 20-SSOP) package. It combines a high-speed serial ADC interface with system-monitoring features typically reserved for dedicated supervisors, making it well suited to mixed-signal data-acquisition boards that also need temperature telemetry. An ADC (analog-to-digital converter) is an integrated circuit that samples a continuous analog voltage and quantizes it into a discrete digital code. The MAX1229 belongs to the successive-approximation register (SAR) family of converters, which use a binary-search algorithm and an internal capacitive DAC to resolve each conversion in one conversion cycle. SAR ADCs sit below delta-sigma and pipelined converters in resolution-vs-speed trade-off, and they are valued for deterministic latency, low power, and excellent dc accuracy - which is why they are a workhorse for industrial control, instrumentation and multi-channel sensor monitoring. Key features include 12-bit resolution, 300 ksps maximum sampling rate, an internal 2.5 V reference (with the option to override with an external reference), six analog inputs plus six digital companions yielding 12 single-ended or 6 true-differential channels, a 16-entry FIFO that offloads the host SPI port, and an integrated diode-based temperature sensor with ±1°C typical accuracy. The serial interface is SPI/QSPI/MICROWIRE-compatible, allowing direct connection to most microcontrollers and DSPs. The MAX1229 also integrates a programmable scan mode, four GPIO-like digital inputs that can be read through the serial port, an analog watchdog with dedicated interrupt output, and a power-down pin that drops quiescent current to a few microamps between conversions. The internal reference and FIFO together minimize external component count - designers usually need only bypass capacitors and the SPI lines to bring up a complete multi-channel data-acquisition front end. Typical applications include industrial process control and PLC analog input modules, rack-mounted and bench test-and-measurement instruments, portable battery-powered data loggers, medical patient-monitoring peripherals, and any system that wants on-board temperature telemetry of its own analog front end. The wide digital-supply range (2.7 V to 5.5 V for DVDD) also simplifies interface to 3.3 V and 5 V microcontrollers. When designing with this part, allocate one decoupling capacitor per supply pin (10 µF bulk plus 0.1 µF ceramic as close to the IC as practical), keep analog and digital grounds joined at a single star point under the IC, and respect the 225°C/W θJA of the QSOP body - it is fine for normal operation but should not be buried under heavy copper pours that block thermal relief. The FIFO depth should be sized larger than the longest SPI-burst latency your host can tolerate without overrun. This page consolidates the manufacturer datasheet, distributor stock, drop-in alternatives and practical design guidance in one place - giving engineers a faster path from MPN to qualified BOM than paging through separate vendor PDFs.

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MAX1229AEEP+T - 12-Bit 300ksps 12-Ch SAR ADC w/ FIFO | Maxim Integrated
MAX1229AEEP+T

MAX1229AEEP+T - 12-Bit 300ksps 12-Ch SAR ADC w/ FIFO | Maxim Integrated

The Analog Devices (formerly Maxim Integrated) MAX1229AEEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (SAR ADC) with a 6 or 12-channel analog input multiplexer, internal 4.096 V reference, internal temperature sensor, and a 16-entry FIFO, packaged in a 20-pin QSOP. It operates from a single +3.0 V to +3.6 V analog supply and a separate +1.8 V to +3.6 V digital supply and communicates via an SPI/QSPI/MICROWIRE-compatible serial interface running up to 20 MHz. A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm against an internal capacitive DAC to produce a digital code in N conversion cycles for an N-bit result. SAR ADCs combine low power consumption, high accuracy, deterministic latency, and excellent AC performance for multiplexed data-acquisition front-ends. The MAX1229AEEP+T sits in the broader hierarchy of data converters -> ADCs -> successive-approximation ADCs -> multiplexed ADCs with integrated housekeeping (reference, temperature sensor, FIFO), reducing external component count for system designers. Key features include ±1 °C accurate internal temperature sensor (for local cold-junction compensation or system health monitoring), a 16-entry FIFO that decouples conversion bursts from host read latency, a software-configurable analog input mux (6 or 12 channels depending on configuration), and scan-mode operation that sequentially cycles through selected channels at the full 300 ksps aggregate rate. Per the Maxim datasheet, the part achieves 12 bits of effective resolution at 300 ksps with low aperture delay suitable for multiplexed process control and instrumentation. The architecture combines a charge-redistribution DAC with input T/H, an internal precision bandgap reference, and a digital sequencer, allowing the host to program channel sequences and conversion modes once into on-chip registers. This makes the device suited for scanning multiple sensors while offloading housekeeping tasks to the part itself. Typical applications include industrial process-control analog input modules, multichannel data-acquisition systems with embedded temperature sensing, medical patient monitoring front-ends, factory-automation sensor hubs, and HVAC building automation. Designers choose it when they need 12-bit resolution at moderate speeds without the noise and EMI penalty of a delta-sigma modulator, while keeping a small SPI-controlled footprint. When designing with this device, place supply-decoupling ceramic capacitors as close as possible to AVDD and DVDD pins, route AGND and DGND with separate pours joined at a single star under the chip, and avoid digital switching traces near the analog inputs to preserve 12-bit noise performance. This page synthesizes distributor pricing, drop-in alternatives from the MAX1227/MAX1231 pin-compatible family, and practical design notes not found in the manufacturer datasheet alone.

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MAX122ACAG - 12-Bit 333ksps SAR ADC, 24-SSOP | Maxim Integrated
MAX122ACAG

MAX122ACAG - 12-Bit 333ksps SAR ADC, 24-SSOP | Maxim Integrated

The Analog Devices / Maxim Integrated MAX122ACAG is a 12-bit, 333 ksps (kilosamples per second) successive-approximation analog-to-digital converter (SAR ADC) housed in a 24-pin SSOP (Shrink Small Outline Package). The part integrates a track-and-hold amplifier, a low-drift internal voltage reference, and parallel digital outputs in a single BiCMOS die, targeting precision data-acquisition front-ends. Its single 5V analog supply operation simplifies power-tree design compared to bipolar-input ADCs that require separate +5V and -5V rails. A SAR ADC is a type of ADC that performs a binary-search conversion cycle against an internal capacitive DAC, yielding deterministic latency (one conversion clock per N bits) and zero pipeline delay. SAR converters sit in the broader hierarchy of analog-to-digital converters, which includes flash, pipeline, delta-sigma, and dual-slope architectures. SAR parts are favored when the application needs a single-shot, low-latency snapshot of an analog waveform rather than the high oversampling of a sigma-delta or the wide bandwidth of a flash ADC. The MAX122 family, in particular, balances speed, accuracy, and integration for instrumentation, control loops, and DSP front-ends. Key specifications include 12-bit resolution, a 333 ksps sampling rate, an internal track/hold with sub-microsecond acquisition, an integrated buried-zener-like reference, and a parallel digital interface. The BiCMOS process allows low analog supply current while supporting TTL/CMOS-compatible parallel logic. Input ranges are typically 0V to +5V unipolar or ±5V bipolar when driven through appropriate signal conditioning, and the parallel output format simplifies connection to standard digital ASICs or DSPs without a serial-port overhead. The MAX122ACAG is typically used in high-speed data-acquisition cards, industrial control systems, digital signal processing front-ends, multiplexed data-logging systems, and precision instrumentation. The device's 500 ksps internal conversion capability (some family members ship rated at 333 ksps or 500 ksps depending on temperature grade) and the on-chip 2.5V reference make it attractive where board area and component count are constrained. When designing with this ADC, pay close attention to analog input drive amplifiers - a fast-settling op amp is required so the input settles within the acquisition window. Decouple the AVdd pin with both a 10 uF bulk and a 0.1 uF ceramic capacitor placed within 5 mm of the pin to keep reference noise out of the conversion. Use a single-point ground for the AGND pin to avoid digital return currents contaminating the analog ground. This page synthesizes distributor pricing, drop-in alternatives in the same 24-SSOP footprint, and practical design notes not found in a single manufacturer datasheet.

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MAX122ACNG - 500ksps 12-Bit ADC with T/H | Maxim Integrated DIP-24
MAX122ACNG

MAX122ACNG - 500ksps 12-Bit ADC with T/H | Maxim Integrated DIP-24

The Maxim Integrated MAX122ACNG is a 12-bit, 500 ksps successive-approximation analog-to-digital converter (ADC) that integrates an on-chip track-and-hold (T/H), a low-drift internal voltage reference, and a parallel digital interface in a single 24-pin PDIP through-hole package. It is a BiCMOS, complete-data-acquisition system-on-chip designed for high-speed, low-power precision conversion in industrial, instrumentation, and DSP-driven applications. An SAR (successive-approximation register) ADC is a sampling architecture that uses a comparator, an internal DAC, and a successive-approximation register to resolve the analog input into N-bit digital codes in N clock cycles. SAR ADCs offer deterministic latency, excellent static linearity, and are well suited for multiplexed-channel data-acquisition systems, motor-control feedback loops, and digital-signal-processing front ends. The MAX122 belongs to the broader category of precision ADCs -> data converters -> signal-chain ICs -> semiconductors. Key specifications include 500 ksps throughput, a 350 ns T/H acquisition time, a 2.46 MHz full-power analog input bandwidth, ±5V bipolar or 0-5V unipolar input range, ±2.5V bipolar input range option, and a low 250 mW typical power dissipation. The device supports both AC and DC specifications with guaranteed no-missing-codes performance and ±0.5 LSB integral nonlinearity (INL) for the A grade. The integrated 2.5V reference has a low ±50 ppm/°C typical temperature drift. Internal architecture uses Maxim's BiCMOS process that places the T/H, reference, clock, and SAR logic on one die, allowing the MAX122 to operate without external precision components. The bus-release and data-access timings are designed to be compatible with most popular microprocessors without inserting wait states, and the chip can also interface directly to a FIFO buffer to virtually eliminate microprocessor interrupt overhead. Power-down mode reduces supply current to under 50 µA for battery-powered and portable applications. Typical applications include data-acquisition systems, DSP analog front ends, digital signal processing front ends, industrial process control, instrumentation, and battery-powered equipment. The wide input range and on-chip reference make the MAX122 equally well suited for transducer signal conditioning in industrial monitoring and as a high-speed front end for DSP-based motor control. In high-end audio and measurement contexts, the deterministic latency simplifies buffer management compared with delta-sigma converters. When designing with the MAX122, ensure that the AV+ and DV+ supplies are decoupled with a 0.1 µF ceramic capacitor placed within a few millimeters of the supply pins, and that the analog and digital grounds are star-connected to maximize noise rejection. If the system requires FIFO buffering, ensure that the RD and CS timings comply with the AC Electrical Characteristics table so that bus contention is avoided during read cycles.

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MAX122ACWG - 12-Bit 500ksps ADC | Maxim Integrated | 24-SOIC
MAX122ACWG

MAX122ACWG - 12-Bit 500ksps ADC | Maxim Integrated | 24-SOIC

The Maxim Integrated MAX122ACWG is a 12-bit successive-approximation analog-to-digital converter (ADC) with a 500 ksps sampling rate, integrated track-and-hold, and internal reference, housed in a 24-pin wide-body SOIC package. It accepts a single analog input channel, operates from a single +5 V analog supply (+5 V or ±5 V digital), and provides a parallel microprocessor-compatible output that can interface directly to FIFOs without wait states in most designs. A successive-approximation ADC is a converter architecture that resolves an analog input one bit per clock cycle using an internal DAC and comparator, achieving high accuracy at moderate sample rates while consuming modest power. The MAX122 belongs to the broader SAR ADC family, which sits between flash ADCs (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, slowest). SAR ADCs are the workhorse of industrial data acquisition, motor control, and instrumentation where deterministic latency and 10-14 bits of effective resolution are required. Key features include 12-bit resolution, 500 ksps maximum throughput, integrated track/hold amplifier, internal 2.5 V bandgap reference, and a low-power shutdown mode that reduces supply current to microamp levels. The device accepts single-ended analog inputs up to +5 V using the internal reference, or bipolar ±5 V inputs with external circuitry. The parallel output interface simplifies memory-mapped connections to standard microcontrollers and DSPs without glue logic. The MAX122ACWG uses a half-flash two-step architecture with on-chip calibration to deliver ±1 LSB integral nonlinearity (INL) and minimal aperture delay. The internal reference is laser-trimmed and buffered, eliminating the need for an external reference in many designs and reducing total BOM cost. The track/hold amplifier features a 4 ns acquisition time, supporting full-scale step inputs on successive conversions without losing codes. Typical applications include industrial process control loops, multi-channel data acquisition systems using an external mux, vibration analysis, sonar/radar signal digitizers, and portable test instruments. The +5 V single-supply operation makes it compatible with legacy industrial backplanes and DSP starter kits. When designing with this part, pay attention to analog and digital ground separation; route the REF decoupling capacitor directly to AGND with a short trace. Enable the shutdown mode via the active-low PD pin between conversion bursts to reduce average current in battery-powered monitoring applications. For best AC performance at high input frequencies, drive the analog input with a low-impedance buffer such as the MAX427 or MAX410. This page synthesizes distributor pricing, drop-in same-package alternatives (MAX120ACWG, MAX122BCWG+, MAX122CWG+), and practical layout notes not always summarized on a single distributor page.

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MAX122AEAG - 500ksps 12-Bit SAR ADC with T/H | Maxim Integrated
MAX122AEAG

MAX122AEAG - 500ksps 12-Bit SAR ADC with T/H | Maxim Integrated

The Maxim Integrated MAX122AEAG is a 12-bit successive-approximation analog-to-digital converter (ADC) with an on-chip track-and-hold, internal 2.5V bandgap reference, and parallel microprocessor interface, offered in a 24-pin SSOP package. A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm through an internal capacitive DAC network to digitize an input voltage in N clock cycles, where N equals the resolution in bits. SAR ADCs occupy the middle ground between ultra-fast flash converters and slow but precise sigma-delta converters, and they are widely used in data acquisition systems, instrumentation, and industrial control where medium-speed (>100 kSPS) sampling and 8- to 16-bit resolution are sufficient. The MAX122AEAG provides 12-bit resolution with sampling rates up to 500 ksps, making it well suited for high-speed process control and multi-channel scanning applications. Key features of the MAX122AEAG include a typical sampling rate of 333 ksps (500 ksps maximum), ±5V analog input range, internal or external reference capability, low power consumption, and a tri-state parallel output bus that simplifies interface to microprocessors and DSPs. The device operates from a single +5V analog supply and a separate digital supply, allowing analog and digital grounds to be isolated for improved noise immunity. The built-in track-and-hold eliminates the need for an external sample-and-hold amplifier and supports input bandwidths beyond the Nyquist limit of the sampling rate. The MAX122AEAG uses a charge-redistribution DAC core combined with a precision internal comparator and successive-approximation register. The BiCMOS process technology enables low analog power consumption while still providing TTL/CMOS-compatible digital I/O. Reference flexibility is a key architectural feature: designers can use the internal 2.5V reference for cost-sensitive designs, or apply an external reference for applications demanding higher absolute accuracy or lower thermal drift. Typical applications include process control and industrial automation, data acquisition systems, digital signal processing front ends, and automotive sensor signal conditioning where a robust SAR ADC with parallel interface simplifies downstream processing. The 24-SSOP footprint also makes the part attractive for space-constrained designs. When designing with the MAX122AEAG, pay close attention to PCB layout and decoupling: keep analog and digital ground planes separated and joined at a single star ground, place the 0.1µF supply bypass capacitors immediately adjacent to the supply pins, and route the analog input traces over a continuous ground plane to minimize injected switching noise. Source impedance should be kept below a few hundred ohms to avoid conversion errors from incomplete settling through the input sampling capacitor. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on any single manufacturer or distributor page.

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MAX122BC/D - 500ksps 12-Bit SAR ADC Die | Maxim Integrated
MAX122BC/D

MAX122BC/D - 500ksps 12-Bit SAR ADC Die | Maxim Integrated

The Maxim Integrated MAX122BC/D is a 500 ksps, 12-bit successive-approximation analog-to-digital converter (ADC) supplied as a bare die, integrating an on-chip track-and-hold amplifier, a buried-zener low-drift voltage reference, and a BiCMOS conversion engine in a single 24-terminal unpackaged die form factor. The /D suffix indicates this is the die (unpackaged) version of the MAX122, intended for hybrid module assembly and custom hermetic packaging rather than conventional PCB reflow soldering. The MAX122BC variant operates over the commercial temperature range of 0C to +70C with 12-bit linearity, while the parallel interface delivers conversion results in a single read cycle. An ADC (analog-to-digital converter) is a data-acquisition mixed-signal IC that samples continuous analog input voltages and converts them into discrete digital codes at a defined sample rate. SAR (Successive Approximation Register) ADCs sit in the middle of the speed-resolution envelope, offering 8-16 bit accuracy at sample rates from tens of ksps to several Msps, making them the workhorse for industrial process control, instrumentation, and DSP front-ends. The MAX122BC/D fits within the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. Its integrated reference and track/hold shorten the analog signal chain to a single IC, eliminating the layout and noise pitfalls of a discrete SAR plus external reference plus external T/H design. Key specifications include a 500 ksps maximum sample rate, 350 ns track/hold acquisition time, 12-bit no-missing-codes resolution, and a built-in 2.5 V low-drift reference. The BiCMOS process combines bipolar front-end accuracy with CMOS digital logic for low power consumption (typically 70 mW at full speed). Parallel output bus and byte-organized read modes simplify connection to most popular microprocessors without wait states, and a FIFO-buffered interface mode minimizes microprocessor interrupt overhead in continuous-acquisition systems. Typical applications for the MAX122BC/D include digital signal processing front-ends, audio-bandwidth data acquisition, speech-recognition subsystems, and high-speed industrial process control where die-level integration enables ruggedized or miniaturized modules. The internal reference and T/H eliminate many external components, but careful attention to PCB ground planes and analog/digital isolation is required to realize the full 12-bit accuracy, particularly in the unpackaged die variant where bond-wire inductance and die-pad capacitance dominate high-frequency behavior. Engineers should treat the /D (die) form factor as a specialty hybrid-assembly part: bond-out diagrams, die pad coordinates, and ESD handling protocols must be sourced from the manufacturer datasheet before any assembly run. Sampling window and acquisition time trade-offs apply as with any SAR ADC - reducing clock rate or adding a front-end buffer amplifier relaxes the input drive requirements but increases aperture uncertainty. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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MAX1230ACEG+ - 12-Bit 300ksps 16-Ch ADC with FIFO | Maxim Integrated
MAX1230ACEG+

MAX1230ACEG+ - 12-Bit 300ksps 16-Ch ADC with FIFO | Maxim Integrated

The Maxim Integrated MAX1230ACEG+ is a 12-bit, 300ksps, 16-channel successive-approximation analog-to-digital converter (SAR ADC) with an internal 4.096V reference, an internal temperature sensor, and a 16-entry FIFO, housed in a 24-pin QSOP package. It accepts either 8 single-ended or 16 differential analog inputs and operates from a single +5V analog supply, drawing only a few milliamps during conversion. An ADC is a mixed-signal integrated circuit that converts real-world analog voltages into discrete digital codes. The MAX1230 belongs to the successive-approximation register (SAR) ADC family, which trades raw speed for high accuracy and low power consumption. Within the broader component taxonomy, SAR ADCs sit beneath data converters, which themselves are a subset of mixed-signal ICs and ultimately semiconductor devices used for precision instrumentation and embedded system design. The MAX1230ACEG+ integrates several blocks normally external to a basic ADC: a true-differential input multiplexer (8 single-ended or 16 differential channels), a low-drift internal reference, a ±1°C internal temperature sensor, a 16-entry First-In/First-Out buffer, configurable scan-mode sequencing, internal averaging, and a power-saving AutoShutdown mode that drops supply current between conversions. The on-chip FIFO lets a host controller sleep while multiple conversions accumulate, easing firmware timing constraints. A 10MHz SPI/QSPI/MICROWIRE-compatible serial interface streams data out without gluing logic to the host bus. Typical applications span industrial process control loops, multi-channel data-acquisition front-ends, battery-cell monitoring and stack voltage measurement, portable and rack-mounted instrumentation, and embedded sensor hubs that also need on-board temperature compensation. The internal temperature sensor eliminates an external thermistor or remote diode in chassis-monitoring designs. For low-power systems, AutoShutdown and scan-mode combine to let the part sip quiescent current while sweeping many channels. When designing with this device, budget for an external 0.1µF bypass capacitor close to the supply pin and a 10µF reservoir on the reference pin to preserve linearity at full 300ksps throughput. Choose between single-ended and differential input modes based on the common-mode range of the upstream signal conditioning; the integrated input mux is software-configurable, so no hardware changes are required to switch between 8 SE or 16 DIFF channels. This page consolidates manufacturer datasheet specifications, current distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the datasheet to help engineers select and qualify the MAX1230ACEG+ quickly.

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MAX1230ACEG+T - 12-Bit 300ksps SAR ADC w/ FIFO & Temp Sensor | ADI
MAX1230ACEG+T

MAX1230ACEG+T - 12-Bit 300ksps SAR ADC w/ FIFO & Temp Sensor | ADI

The Analog Devices (formerly Maxim Integrated) MAX1230ACEG+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter with 12 analog input channels (configurable as 8 single-ended/16 pseudo-differential inputs), an internal 4.096V reference, an internal temperature sensor with +/-1 degree C accuracy, a 16-entry FIFO, scan mode, internal averaging, and AutoShutdown, housed in a 24-pin QSOP package. An SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that converts an analog input signal into a digital output code through a binary search algorithm using an internal DAC and comparator. SAR ADCs sit in the data-converter hierarchy alongside sigma-delta and pipeline ADCs, offering an attractive trade-off between sample rate, resolution, and power consumption. The MAX1230 belongs to the data-acquisition IC family, used wherever multiple analog channels must be digitized at moderate speeds with deterministic latency. Key features of the MAX1230ACEG+T include a 300 ksps maximum sample rate through its SPI/QSPI/MICROWIRE-compatible serial interface, true-differential analog multiplexer with software-configurable input ranges (unipolar 0-VREF or bipolar +/-VREF), 16-entry FIFO for reducing host-processor interrupt overhead, and an internal temperature sensor that removes the need for an external thermal-monitoring part. The integrated 4.096 V reference simplifies BOM and the AutoShutdown feature drops supply current to microampere levels between conversions to extend battery life in portable equipment. Typical applications include 4-20 mA industrial sensor digitizers, multi-channel data-acquisition front-ends for process control, portable battery-powered instrumentation, system-health monitoring using the on-die temperature sensor, and distributed I/O modules. The 16-entry FIFO enables the host microcontroller to sleep between bursts of conversions, making the part well suited to power-constrained IoT edge devices. When designing with this device, ensure the input common-mode voltage stays within the analog multiplexer ratings and place the 1 nF reference bypass capacitor as close as possible to the REF pin. The internal temperature sensor is calibrated at 25 degree C, so thermal-proximity to external heat sources will degrade accuracy; isolate the die thermally for high-precision measurements.

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MAX1231ACEG+ - 12-Bit 300ksps 16-Ch SAR ADC | Maxim Integrated
MAX1231ACEG+

MAX1231ACEG+ - 12-Bit 300ksps 16-Ch SAR ADC | Maxim Integrated

The Maxim Integrated (now Analog Devices) MAX1231ACEG+ is a 12-bit, 300 ksps, 16-channel successive-approximation analog-to-digital converter (SAR ADC) with an internal 2.5V reference, an internal FIFO, and an on-die temperature sensor, housed in a 24-pin QSOP (EG) package. The part operates from a 3.0V to 3.6V analog supply and a 2.7V to VAVDD digital supply, with a 300 kHz conversion rate and 8/16 selectable analog input channels. An SAR ADC is a type of data converter that uses a binary-search successive-approximation algorithm to digitize an analog input voltage within one conversion cycle. The MAX1231 belongs to the data-acquisition IC family, which itself sits in the broader analog-to-digital converter hierarchy under signal chain and data conversion. SAR ADCs are favored over delta-sigma converters in multiplexed applications because they offer low latency, deterministic throughput, and excellent DC accuracy without the digital filtering delay of oversampling architectures. Key features of the MAX1231ACEG+ include an internal FIFO that allows up to 16 conversion results to be stored before servicing interrupts, an internal temperature sensor that returns die temperature with 1°C accuracy, an internal 2.5V reference (with optional external reference override), single-ended or pseudo-differential input modes, and a high-speed SPI/QSPI/MICROWIRE-compatible serial interface. The device supports software-configurable analog inputs (8 single-ended or 16 inputs in scan mode) and provides programmable scan averaging (1, 2, 4, 8, 16, 32, 64, or 128 samples). Architecturally, the MAX1231 uses a capacitive charge-redistribution DAC and an input track-and-hold, which gives true 12-bit linearity (INL and DNL both below ±1 LSB max) and low aperture delay. An integrated input-protection clamp allows the inputs to tolerate ±6V fault voltages without latch-up, simplifying connection to industrial sensor networks where transients are common. The internal reference and FIFO reduce host-side overhead, allowing a low-cost microcontroller to manage up to 16 analog channels with minimal bus traffic. Typical applications for the MAX1231ACEG+ include industrial process control and monitoring, multichannel data-acquisition systems, temperature-compensated sensor front ends, HVAC controls, battery-cell monitoring, and rack-mounted instrumentation. The wide analog input range, internal reference, and integrated temperature channel are particularly useful in distributed I/O modules. When designing with this ADC, ensure adequate decoupling on both AVDD and DVDD pins (typically a 10 µF bulk plus a 0.1 µF ceramic) and place the bypass capacitor on the REF pin within 5 mm of the REF pin to preserve reference stability. The serial-interface clock can run up to 10 MHz in SPI mode 0, but the 300 ksps throughput ceiling must be respected by timing the SCLK bursts accordingly. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including a pinout reference and parametric comparison against same-family Maxim and Analog Devices 12-bit ADC options.

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MAX1231ACEG+T - 12-Bit 300ksps ADC, 16-Ch, FIFO, QSOP-24 | ADI
MAX1231ACEG+T

MAX1231ACEG+T - 12-Bit 300ksps ADC, 16-Ch, FIFO, QSOP-24 | ADI

The Analog Devices (formerly Maxim Integrated) MAX1231ACEG+T is a low-power, 12-bit, 300 ksps, serial-output, multi-channel successive-approximation analog-to-digital converter (ADC) with an internal 2.5 V reference, an internal ±1 °C accuracy temperature sensor, and a 16-entry first-in/first-out (FIFO) buffer, housed in a 24-pin QSOP package. It accepts 8 or 16 single-ended analog inputs (or 4 or 8 true-differential pairs) through an analog multiplexer and converts them to a 12-bit serial result at up to 300,000 samples per second. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary-search algorithm with an internal DAC and comparator to digitize an analog input in N conversion cycles for N bits of resolution. SAR ADCs offer deterministic latency, no pipeline delay, excellent DC accuracy, and are well-suited for multiplexed multi-channel data acquisition at moderate speeds, sitting in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. Key features of the MAX1231ACEG+T include 300 ksps throughput, an internal 2.5V reference (4.096V on the B-grade), ±1 °C internal temperature sensor accuracy, a 16-entry FIFO for host offload, SPI/QSPI/MICROWIRE-compatible serial interface, 3 V or 3.3 V single-supply operation, low 1.6 mA (typ) operating current, software-configurable unipolar/bipolar and single-ended/differential input ranges (0 to VREF, ±VREF, 0 to 2×VREF, ±2×VREF), and QSOP-24 footprint. The FIFO allows the part to capture bursts while the host processor is busy with other tasks. The architecture combines a low-charge-distribution input T/H with a precision SAR core, an internal bandgap-derived reference, and a digital serial engine that supports daisy-chaining of multiple MAX1227/MAX1229/MAX1231 devices on a single SPI bus. The analog inputs can be configured as 8 single-ended channels (A-com version), 16 single-ended channels (B/C versions), or as differential pairs, and the internal temperature sensor die measurement simplifies system thermal monitoring. Typical applications include industrial process control and data acquisition, system health monitoring with on-die temperature sensing, multichannel instrumentation, battery-powered portable data loggers, factory automation sensor interfaces, and medical patient monitoring front ends. The FIFO and channel-scan modes simplify firmware by offloading periodic scan housekeeping from the host MCU. When designing with this device, ensure that the analog input signals remain within the absolute maximum ratings (GND - 0.3 V to VDD + 0.3 V), use the recommended 0.1 µF ceramic bypass capacitor on VDD placed within 5 mm of the pin, and configure the serial-interface clock polarity/phase to match the host controller. Unused analog inputs should be tied to a defined mid-supply voltage to minimize crosstalk. This page synthesizes distributor pricing, pin-compatible same-family Maxim drop-in alternatives, and practical design notes that are not available in the standalone manufacturer datasheet, including FIFO mode configuration guidance and SPI daisy-chain wiring tips.

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MAX1231AEEG+ - 12-Bit 300ksps 16-Ch ADC w/FIFO & Temp Sensor
MAX1231AEEG+

MAX1231AEEG+ - 12-Bit 300ksps 16-Ch ADC w/FIFO & Temp Sensor

The Analog Devices (formerly Maxim Integrated) MAX1231AEEG+ is a 12-bit resolution, 300 ksps, low-power, serial-output, multi-channel analog-to-digital converter (ADC) with an internal 4.096V reference and integrated temperature sensor, housed in a 24-pin QSOP package. The device supports 8 or 16 single-ended analog input channels (or 4 or 8 differential pairs) and operates from a single 3.0V to 3.6V analog supply with a separate 3.0V to 5.5V digital supply for flexible interfacing with 1.8V to 5V logic. An ADC (Analog-to-Digital Converter) of this type belongs to the successive-approximation-register (SAR) converter family, which sits within the broader data-converter hierarchy under mixed-signal integrated circuits. SAR ADCs sample the input track with a sample-and-hold amplifier and then perform a binary search through an internal DAC to determine each bit. They are prized for deterministic latency, low power consumption at modest sampling rates, and the absence of pipeline delay - making them ideal for multiplexed multi-channel data-acquisition systems. Key features include 300 kilosamples per second throughput, an internal FIFO with programmable depth, an internal temperature sensor readable via the same serial interface, a 4.096V internal reference, and an SPI/QSPI/MICROWIRE-compatible serial interface. The part also integrates a 16-entry channel-scan table, configurable single-ended or differential inputs, and software-configurable unipolar/bipolar input ranges. Typical applications include portable and battery-powered data acquisition, process control and industrial automation, temperature monitoring with the on-die sensor, patient monitoring and medical instrumentation, and remote-sensor data logging. The 24-pin QSOP footprint keeps board area minimal while supporting up to 16 analog channels. When laying out a PCB with the MAX1231AEEG+, place the 0.1 microfarad decoupling capacitors as close as possible to AVDD and DVDD pins and provide a solid ground plane directly under the device. The analog and digital ground pins should be tied at a single star point near the IC. Avoid routing digital signals beneath the analog input traces to prevent digital switching noise from coupling into the ADC front end. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes beyond what is in the Maxim datasheet, including a quantified channel-count and supply-rail comparison versus competing pin-compatible ADCs such as the MAX1229 and MAX1227.

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MAX1231AEEG+T - 12-Bit 300ksps ADC, FIFO, Temp Sensor, SSOP-24 | Maxim
MAX1231AEEG+T

MAX1231AEEG+T - 12-Bit 300ksps ADC, FIFO, Temp Sensor, SSOP-24 | Maxim

The Maxim Integrated (now Analog Devices) MAX1231AEEG+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (ADC) with an internal 4.096 V reference, an internal temperature sensor (±1°C accuracy), and a 16-entry First-In/First-Out (FIFO) buffer, housed in a 24-pin SSOP package. It operates from a single +3.0 V to +3.6 V analog supply and a +1.7 V to +3.6 V digital supply, making it suitable for 3.3 V mixed-signal systems. What is a successive-approximation ADC? A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm and a precision DAC to convert an analog input to a digital code one bit at a time per clock cycle. SAR ADCs sit in the converter hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. They are favored over delta-sigma converters where low latency, deterministic sampling, and high absolute accuracy at moderate resolutions (10-16 bit) are required, such as in industrial process control and sensor monitoring. Key features include 12-bit resolution with no missing codes, ±1 LSB INL (max), an analog multiplexer supporting 8 single-ended or 4 pseudo-differential inputs (channel count varies by family member: MAX1227 has 8, MAX1229 has 12, MAX1231 has 16), SPI/QSPI/MICROWIRE-compatible serial interface, and a hardware shutdown mode that drops supply current to under 1 µA. The 16-entry FIFO reduces host MCU overhead by allowing block reads of multiple conversions. The MAX1231AEEG+T uses a capacitive charge-redistribution DAC with a precision bandgap reference and an integrated temperature sensor routed through the analog mux, eliminating the need for an external temp-sensing IC. The architecture achieves 300 ksps throughput while consuming only 2.7 mA (typ) active and 1 µA shutdown, making it appropriate for both high-speed data acquisition and power-conscious portable designs. Typical applications include industrial process control, multichannel data acquisition systems, patient monitoring and portable medical instrumentation, factory automation sensor panels, and thermocouple/RTD temperature compensation. Designers choose the MAX1231AEEG+T when they need a complete, calibrated 12-bit acquisition front end with embedded temperature sensing in a small SSOP footprint. When designing with this part, place the 0.1 µF supply bypass capacitors within 5 mm of AVDD and DVDD, and route REF+ to AVDD via a short trace to preserve reference accuracy. Do not exceed the absolute maximum AVDD of 4.2 V or apply analog inputs above AVDD + 0.3 V, as the input ESD structure is not tolerant of over-range. This page synthesizes distributor pricing, drop-in alternatives sourced from the Maxim part family, and practical design notes that are not collated in the manufacturer datasheet.

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MAX1236EUA+CHV - 12-Bit 4-Ch I2C ADC, 8-µMAX
MAX1236EUA+CHV

MAX1236EUA+CHV - 12-Bit 4-Ch I2C ADC, 8-µMAX

The Maxim Integrated MAX1236EUA+CHV is a 12-bit, low-power, 4-channel successive-approximation analog-to-digital converter (SAR ADC) with internal track/hold, voltage reference, clock, and an I2C-compatible 2-wire serial interface, supplied in an 8-pin µMAX package. The device operates from a single analog/digital supply of 2.7V to 3.6V (low-voltage mode) or 4.5V to 5.5V (high-voltage mode) and supports up to 12 single-ended or 6 differential analog input channels selected through software. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that converts an analog input voltage into a digital code using a binary search algorithm against an internal precision DAC; it occupies the broader hierarchy of data converter -> ADC -> SAR ADC within signal chain semiconductors. SAR ADCs are valued for deterministic latency, low power consumption, and excellent DC accuracy, making them the dominant architecture for multiplexed multi-channel data acquisition in industrial control, instrumentation, and sensor readout subsystems where a single converter services many sensors sequentially. Key features of the MAX1236 include a 4.096V internal reference (MAX1236 variant), a guaranteed 12-bit resolution with no-missing-codes performance, a maximum sampling rate of 94.4 kSPS (8 µs conversion + acquisition), true-differential inputs with software-configurable unipolar/bipolar ranges, and an I2C-compatible serial interface with user-selectable slave addresses. The internal 4.096V reference can be overdriven by an external reference between 1V and VDD for applications requiring absolute accuracy or ratiometric measurement. The MAX1236 architecture combines a precision charge-redistribution DAC, an input track/hold that settles to 12 bits in less than 1.5 µs, and a digital comparator running the SAR search algorithm, all clocked from an internal 3 MHz oscillator. The high-impedance analog inputs can tolerate source impedances up to 1.5 kΩ without degrading linearity, and the digital section provides straight-binary (unipolar) or two's-complement (bipolar) output codes. Typical applications include industrial sensor data acquisition (4-20 mA loop digitization via external resistor), battery-powered handheld instruments, portable medical monitors, PLC analog input modules, HVAC environmental sensors, and consumer audio VU-meter front-ends. The wide supply tolerance lets the same PCB design work at 3.3V or 5V rails without modification. When designing with this device, allocate adequate PCB area for the analog input traces; keep them short and routed away from digital lines and clock edges. Use a single ground plane with the AGND and DGND pins tied together at the device to minimize return-path noise. Average 4 to 16 conversions in firmware to drop effective noise below 1 LSB. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design guidance for MAX1236EUA+CHV that complements the manufacturer datasheet.

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MAX1236KEUA+T - 12-Bit 4-Ch SAR ADC | Analog Devices
MAX1236KEUA+T

MAX1236KEUA+T - 12-Bit 4-Ch SAR ADC | Analog Devices

The Analog Devices (formerly Maxim Integrated) MAX1236KEUA+T is a 12-bit, low-power, 4-/12-channel, 2-wire serial (I2C-compatible) successive-approximation analog-to-digital converter (SAR ADC) in an 8-pin µMAX package, supporting input ranges of 2.7V to 3.6V and 4.5V to 5.5V. It integrates an internal track/hold (T/H), internal voltage reference, internal clock, and an I2C-compatible 2-wire serial interface operating up to 400 kHz in fast mode and 1.7 MHz in high-speed mode. The MAX1236KEUA+T features 4 single-ended analog input channels and operates with a maximum sampling rate of approximately 94.4 ksps. An ADC (Analog-to-Digital Converter) is a semiconductor device that converts continuous analog voltage signals into discrete digital codes for processing by microcontrollers, FPGAs, or DSPs. The SAR (Successive Approximation Register) architecture uses a binary search algorithm against an internal DAC to determine each bit in sequence, providing a deterministic conversion time independent of input signal amplitude. The MAX1236 belongs to the SAR ADC sub-family within the broader category of data converters and is one of the smallest pin-count multi-channel SAR ADCs available for embedded sensing applications. Key features include 4 single-ended analog input channels (multiplexed to one ADC core), an internal 2.5V reference, internal track/hold amplifier, internal oscillator eliminating the need for an external crystal, and an automatic power-down mode between conversions that reduces supply current to a few microamps. The I2C-compatible serial interface supports standard mode (100 kHz), fast mode (400 kHz), and high-speed mode (1.7 MHz), and the device includes two slave address options for bus sharing. The MAX1236-MAX1239 family is organized by channel count and input configuration: MAX1236 provides 4 single-ended inputs, MAX1238 provides 12 single-ended inputs, and MAX1237/MAX1239 provide pseudo-differential inputs. The MAX1236KEUA+T variant operates from 2.7V to 3.6V and 4.5V to 5.5V, while the MAX1236LEUA+ operates from 2.7V to 3.6V only, making the K variant more suitable for 5V-tolerant industrial systems. Typical applications include industrial process control sensor monitoring, portable battery-powered data acquisition, handheld instrumentation, 4-20 mA loop-powered transmitters, HVAC sensor interfaces, and consumer equipment monitoring. The combination of low power consumption and small µMAX-8 footprint makes it well-suited for space-constrained designs. When designing with this ADC, place the 0.1 µF bypass capacitor as close as possible to the AVDD pin and route analog and digital grounds to a common star point to minimize digital switching noise coupling into the analog inputs. For best linearity performance, average multiple conversions or oversample when input bandwidth permits. This page synthesizes distributor pricing, drop-in alternatives, and parametric comparisons not consolidated in the manufacturer datasheet alone, providing a single-source reference for design engineers evaluating the MAX1236KEUA+T for low-power multi-channel ADC applications.

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MAX1236LEUA+ - 12-Bit, 4-Ch SAR ADC, I2C, 8-uMAX | Maxim
MAX1236LEUA+

MAX1236LEUA+ - 12-Bit, 4-Ch SAR ADC, I2C, 8-uMAX | Maxim

The Maxim Integrated (Analog Devices) MAX1236LEUA+ is a 12-bit, low-power, 4-/12-channel, 2-wire (I2C-compatible) successive-approximation analog-to-digital converter (ADC) in an 8-pin uMAX/uSOP package. Operating from 2.7V to 3.6V or 4.5V to 5.5V supplies, the device integrates an internal track/hold, voltage reference, clock, and I2C-compatible serial interface supporting 400 kHz Fast Mode and 1.7 MHz High-Speed Mode. The MAX1236 variant provides 4 single-ended analog input channels (vs 12 on MAX1237/MAX1238/MAX1239). A successive-approximation register (SAR) ADC is a member of the data-converter family that converts an analog input to a digital code using a binary-search algorithm executed by an internal DAC and comparator. SAR ADCs deliver deterministic latency, no pipeline delay, and excellent DC accuracy for multiplexed multi-channel applications. They sit hierarchically between sigma-delta ADCs (higher resolution, lower speed) and flash ADCs (fastest, lowest resolution), making them the default choice for general-purpose multi-channel 12-bit embedded designs. Key features of the MAX1236LEUA+ include 12-bit resolution, 4 single-ended input channels, low operating current (typically sub-mA during conversions), an internal 2.5V reference, software-configurable unipolar/bipolar input range via the SETUP byte, and an industrial -40C to +85C temperature grade. The 'LEUA' suffix denotes the 8-pin uMAX package and the lead-free/RoHS-compliant finish; the '+' indicates lead-free, RoHS-compliant factory finish. The MAX1236LEUA+ ships in the small 8-pin uMAX footprint, well suited to space-constrained sensor-interface PCBs. Architecture-wise the device pairs a charge-redistribution DAC with a high-performance comparator and on-chip digital control logic. The internal reference and oscillator minimize external component count, and the I2C address is user-programmable through the AD pin, allowing up to four MAX1236-family devices on a single bus. Hardware and software shutdown reduce supply current to microampere levels between conversions for battery-friendly duty-cycled sampling. Typical applications include portable instrumentation, battery-powered sensor data acquisition, multi-cell battery monitoring, thermistor/RTD front ends, PLC analog input cards, and any low-density multi-channel embedded measurement. The 4-channel count fits 3-rail voltage plus current sensing, or 4-channel thermocouple/temperature interfaces. Software-configurable input ranges simplify scaling to industrial 0-10V (with external dividers) and 4-20 mA loops (with external shunt). Design consideration: external input RC filtering on each analog input protects against out-of-band noise and source-impedance-induced gain error. The I2C bus pull-ups must be sized to balance rise time against bus capacitance for the chosen clock rate (100/400 kHz or 1.7 MHz High-Speed Mode). This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the Maxim datasheet alone.

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MAX1236LEUA+T - 12-Bit 4-Ch 94ksps SAR ADC I2C | Maxim
MAX1236LEUA+T

MAX1236LEUA+T - 12-Bit 4-Ch 94ksps SAR ADC I2C | Maxim

The Maxim Integrated MAX1236LEUA+T (Analog Devices Inc./Maxim Integrated) is a 12-bit, low-power, 4-channel successive-approximation analog-to-digital converter (SAR ADC) with internal track/hold, voltage reference, clock, and an I2C-compatible 2-wire serial interface. It operates from a single 4.5V to 5.5V analog supply, delivers up to 94.4 ksps throughput, and dissipates only 670 µA at full sampling rate. The device integrates 4 single-ended or 2 differential analog input channels and is housed in an 8-pin µMAX (uSOP) surface-mount package, supplied here on tape and reel. What is an SAR ADC: A successive-approximation register analog-to-digital converter is a type of low-to-medium speed, medium-resolution data converter that performs a binary search through an internal DAC to digitize an analog input one bit per clock cycle. SAR ADCs sit in the broader taxonomy of data converters (ADC -> data converter -> signal chain -> mixed-signal IC -> semiconductor). They are prized for deterministic latency, no-pipeline delay, excellent DC accuracy, and very low power consumption relative to pipeline or delta-sigma ADCs at similar speeds. Key features include 12-bit resolution with no missing codes, ±1 LSB INL/DNL (max), an internal 2.5V reference (also accepting an external reference), a software-configurable unipolar/bipolar analog input range (0 to VREF or ±VREF), low 1.5 mA power-down current, and a hardware/software shutdown mode that drops quiescent current to microampere levels. The I2C interface supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes, simplifying connection to virtually any modern microcontroller. The MAX1236LEUA+T uses a charge-redistribution DAC architecture with an input track/hold, ensuring accurate sampling of fast-moving signals and providing inherent single-cycle conversion. An on-chip 2.5V bandgap reference is trimmed at final test, eliminating external reference components and reducing BOM cost and board area. The device is specified over the -40°C to +85°C industrial temperature range. Typical applications include portable data acquisition, patient monitoring and medical instrumentation, process control loops, battery-powered sensor reading, plus battery monitoring on 4-cell battery stacks. The integrated reference and small µMAX footprint also suit space-constrained designs where a 4-channel SAR ADC must coexist with a small microcontroller. Design consideration: route the I2C SDA/SCL traces with 4.7 kΩ pull-ups and place a 0.1 µF decoupling capacitor within 5 mm of the AVDD pin; the analog inputs are sample-and-hold based, so adding a small RC (typically 100 Ω + 100 pF) at AIN pins reduces kickback. This page synthesizes distributor pricing, drop-in same-package alternatives, application-specific design notes, and selection guidance that is not present in the bare manufacturer datasheet.

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MAX1237EUA+TGA8 - 12-Bit 4-Ch 2-Wire Serial ADC | Analog Devices
MAX1237EUA+TGA8

MAX1237EUA+TGA8 - 12-Bit 4-Ch 2-Wire Serial ADC | Analog Devices

The Analog Devices (formerly Maxim Integrated) MAX1237EUA+TGA8 is a low-power, 12-bit, 4-/12-channel, 2-wire serial successive-approximation analog-to-digital converter (SAR ADC) with an internal 2.048V reference and an I2C-compatible serial interface. It operates from 2.7V to 3.6V or 4.5V to 5.5V supplies, delivers up to 94.4 ksps throughput, and consumes only 670 uA at maximum sampling rate while dropping below 230 uA in low-power modes. The MAX1237 variant is housed in an 8-pin uMAX (uSOP) package and supports 4 single-ended analog input channels plus the internal reference and an analog supply monitor. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation register to convert an analog input voltage into a digital code, one bit at a time, in N clock cycles for N-bit resolution. SAR ADCs sit in the broader hierarchy of data-converter ICs (ADC/DAC), themselves a subcategory of signal chain and mixed-signal integrated circuits. They are prized for low latency, deterministic conversion, excellent DC accuracy, and moderate-to-high speed without the pipeline latency of pipelined converters. The MAX1237's internal track/hold, voltage reference, clock, and I2C-compatible 2-wire serial interface integrate the full signal path, simplifying front-end design. Key features include 12-bit resolution, 4 single-ended input channels, an integrated 2.048V reference (1V external reference option for FS range 1V to VDD), hardware-configurable I2C address pins (the MAX1237 variant supports four selectable slave addresses), an end-of-conversion interrupt, and an automatic low-power shutdown between conversions that drops supply current to under 1 uA. The MAX1237 is pin-compatible with the MAX1236 (4.096V internal reference) within the same family, simplifying reference-voltage selection in the same PCB footprint. Typical applications include battery-powered data acquisition systems, portable instrumentation, temperature and sensor signal conditioning (with external signal conditioning), industrial process control loops, digital panel meters, and embedded system analog front-ends where I2C bus connectivity, low power, and small package size are required. Designers frequently pair the MAX1237 with microcontrollers featuring I2C controllers (e.g., MAX32xxx, STM32, or PIC families) to build compact 4-channel monitoring systems. The MAX1237EUA+TGA8 packaging variant is supplied in Tape & Reel packaging and is intended for high-volume manufacturing.

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MAX1237KEUA+ - 12-Bit 4-Ch 94.4kSPS 2-Wire ADC | Maxim
MAX1237KEUA+

MAX1237KEUA+ - 12-Bit 4-Ch 94.4kSPS 2-Wire ADC | Maxim

The Maxim Integrated (now Analog Devices) MAX1237KEUA+ is a 12-bit, low-power, 4-/12-channel, 2-wire (I2C-compatible) serial analog-to-digital converter (ADC) with internal track/hold, voltage reference, and clock, offered in an 8-pin µMAX (uMAX/uSOP, 3mm) package. The K suffix designates 12 input channels and EUA designates the 8-pin µMAX. The part operates from +2.7V to +3.6V or +4.5V to +5.5V dual-range supplies, draws 133 µA typ at 94.4 ksps, and supports a fast 94.4 ksps throughput. An ADC (Analog-to-Digital Converter) is a data-conversion integrated circuit that samples continuous analog voltages and produces a discrete digital code for processing by a microcontroller or DSP. Successive-approximation register (SAR) ADCs combine low power, deterministic latency, and high accuracy, making them the dominant choice for multiplexed multi-channel sensor acquisition. The MAX1237 belongs to the SAR ADC family, in the hierarchy ADC -> data converter -> signal chain IC -> mixed-signal semiconductor. Key features include 12-bit resolution with ±1 LSB INL/DNL (max), an internal 4.096V reference (the K version), single-ended analog inputs from 0 to VREF, an I2C-compatible serial interface with up to 400 kHz clock, software-configurable unipolar/bipolar operation, and a low-power shutdown mode that drops supply current below 1 µA. The internal reference saves external circuitry and improves temperature stability versus an external RA-RA divider. Architecturally, the MAX1237 uses a charge-redistribution SAR core with an input analog multiplexer, an integrated T/H, and an internal bandgap-based reference. The wide supply flexibility (2.7V-3.6V or 4.5V-5.5V) lets it ride directly on 3.3V digital rails or on 5V analog rails, while pin-selectable address bits support up to four devices on one I2C bus. Auto-shutdown between conversions minimizes average current in battery-powered, duty-cycled applications. Typical applications include battery-powered temperature monitoring, 4-20 mA loop process instrumentation, handheld data loggers, PLC analog input modules, and HVAC sensor-front ends. The internal multiplexer (12 channels) eliminates an external analog switch, while the I2C interface reduces microcontroller pin count versus parallel-output ADCs. When designing with the MAX1237, place the 0.1 µF VDD bypass capacitor within 5 mm of the supply pin, route SDA/SCL away from the analog inputs, and use the software-programmable setup register to enable auto-shutdown for standby power budgets below 10 µA. This page synthesizes distributor pricing, drop-in equivalents from the MAX1236/MAX1136 families, and practical I2C layout guidance not consolidated in the manufacturer datasheet.

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