Analog Devices Inc./Maxim Integrated MAX11322ATJ+

Overview

MAX11322ATJ+ from Maxim Integrated is a 12-bit, 4-channel, 1Msps SAR analog-to-digital converter with external reference support, ±1 LSB INL/DNL, 70dB SINAD at 100kHz, and post-mux signal access for external conditioning - deployed in high-speed industrial data acquisition systems requiring precision, low power, and flexible input configuration.

For engineers reviewing the MAX11322ATJ+ datasheet, MAX11322ATJ+ pinout, MAX11322ATJ+ application, or MAX11322ATJ+ equivalent, this device delivers verified 12-bit accuracy, true differential track/hold capability, SampleSet™ programmable sequencing, internal FIFO, and 3-wire SPI-compatible interface - all in a 32-pin 5mm × 5mm TQFN package rated for -40°C to +125°C operation.

Technical Context

The MAX11322ATJ+ implements a successive approximation register (SAR) architecture with dual clock modes: internally clocked (with integrated 16-entry FIFO and averaging) and externally clocked (enabling SampleSet™ user-defined channel sequencing up to 256 entries). It supports single-ended, fully differential, and pseudo-differential inputs across four analog channels.

Its analog front-end provides direct access to multiplexer outputs (AOP/AON) and ADC inputs (AIP/AIN), enabling external signal conditioning between stages - including gain, filtering, or buffering - even for differential signals. Reference inputs accept 1V to VDD, and digital I/O operates from 1.5V to 3.6V independent of analog supply.

Key Specifications

Pinout & Package

MAX11322ATJ+ is housed in a 32-pin, 5mm × 5mm, 0.8mm height TQFN package with exposed pad (EP), optimized for thermal performance and PCB space efficiency in compact designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, multichannel SAR ADC applications.

Compared with ADS8684IPWR and AD7952BCPZ-RL7, the MAX11322ATJ+ uniquely integrates post-mux signal access, SampleSet™ sequencing, and internal FIFO - reducing BOM count, simplifying layout, and offloading MCU tasks in resource-constrained embedded systems.

Availability

MAX11322ATJ+ is available at Aetrix Electronics and suitable for industrial process monitoring, high-speed closed-loop control, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +125°C operation.

Supply support for MAX11322ATJ+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and high-reliability ICs for industrial, medical, and automotive applications.

The MAX11321–MAX11328 family was designed to address high-speed, low-power, multichannel data acquisition needs where signal chain flexibility, small footprint, and deterministic timing are critical - especially in space- and power-constrained embedded systems.

FAQ

What is the maximum sampling rate supported by the MAX11322ATJ+?

The MAX11322ATJ+ supports a maximum conversion rate of 1Msps in both internal and external clock modes. At this rate, it achieves full 12-bit accuracy with ±1 LSB INL/DNL, 70dB SINAD at 100kHz, and consumes 5.4mW from a 3V supply - making it suitable for real-time transient capture in industrial and medical systems.

Does the MAX11322ATJ+ support differential input configurations?

Yes, the MAX11322ATJ+ supports fully differential, pseudo-differential, and single-ended input configurations across its four analog channels. In differential mode, it accepts signals between AIP and AIN with operational range of ±VREF+/2 or ±VREF+, and maintains 70dB SINAD performance - validated in the datasheet's typical operating characteristics.

How does the SampleSet™ feature work in the MAX11322ATJ+?

SampleSet™ is a user-programmable channel sequencer in the MAX11322ATJ+ that allows loading of custom scan patterns up to 256 entries. It operates in external clock mode and autonomously sequences conversions without MCU intervention - reducing communication overhead and enabling mixed-rate sampling of high- and low-frequency signals within one acquisition frame.

What package type and dimensions does the MAX11322ATJ+ use?

The MAX11322ATJ+ uses a 32-pin TQFN package measuring 5mm × 5mm with 0.8mm height and an exposed pad (EP). This compact, thermally enhanced package supports high-density PCB layouts and meets JEDEC standards for reflow soldering - with thermal resistance θ_JA = 29°C/W and θ_JC = 1.7°C/W.

Can the MAX11322ATJ+ operate with separate analog and digital supplies?

Yes, the MAX11322ATJ+ features independent analog (VDD, GND) and digital (OVDD, DGND) power domains. VDD ranges from 2.35V to 3.6V for analog circuitry, while OVDD supports 1.5V to 3.6V for I/O - enabling noise isolation, level-shifting with low-voltage MCUs, and improved SNR in mixed-signal systems.