Analog Devices Inc./Maxim Integrated MAX11332ATJ+

Overview

MAX11332ATJ+ from Maxim Integrated is a 10-bit, 8-channel SAR analog-to-digital converter with external reference support, 3Msps conversion rate, 500kHz full-linear bandwidth, and post-mux signal conditioning access via AOP/AON/AIP/AIN pins. It operates from 2.35V–3.6V, consumes 15.2mW at 3Msps, and targets high-speed data acquisition in battery-powered industrial sensors.

For engineers reviewing the MAX11332ATJ+ datasheet, MAX11332ATJ+ pinout, MAX11332ATJ+ application, or MAX11332ATJ+ equivalent, this page delivers verified specifications, real-world timing behavior, SampleSet sequencer configuration details, FIFO buffer operation, and validated alternative options for multichannel embedded systems.

Technical Context

The MAX11332ATJ+ implements a successive approximation register (SAR) architecture with dual clock modes: internal clock (enabling 16-entry FIFO and on-chip averaging) and external clock (supporting SampleSet programmable channel sequencing up to 256 entries). Its analog front-end includes a true differential track-and-hold multiplexer with configurable single-ended, fully differential, or pseudo-differential input modes per channel.

It provides direct external access to the multiplexer output (AOP/AON) and ADC input (AIP/AIN), enabling external signal conditioning-such as filtering or gain adjustment-between mux and ADC stages. The 48MHz 3-wire SPI/QSPI/MICROWIRE-compatible interface uses CPOL=CPHA=1 and supports channel-ID tagging in output data frames.

Key Specifications

Pinout & Package

MAX11332ATJ+ is housed in a 32-pin, 5mm × 5mm TQFN package with exposed pad (EP) requiring direct connection to GND for thermal and noise performance. Pin functions are validated per Maxim's official pin configuration diagrams for the 8-channel variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SAR ADC applications.

Compared with ADS8684IPWR and AD7980BRMZ, MAX11332ATJ+ uniquely combines 8-channel integration, post-mux signal conditioning access, and SampleSet programmability-enabling compact, low-overhead multichannel acquisition without external logic or firmware scheduling.

Availability

MAX11332ATJ+ is available at Aetrix Electronics and suitable for industrial motor control, portable medical sensors, automotive battery management, and smart grid sensor nodes requiring stable component supply, extended temperature operation, and low-power multichannel data acquisition.

Supply support for MAX11332ATJ+ 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, designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets with emphasis on power efficiency and integration.

The MAX11329–MAX11332 product line was engineered to simplify high-speed multichannel data acquisition by embedding programmable sequencing, FIFO buffering, and external signal conditioning access-reducing system-level complexity in space- and power-constrained applications.

FAQ

What is the maximum sampling rate supported by MAX11332ATJ+?

The MAX11332ATJ+ supports a maximum conversion rate of 3Msps in both internal and external clock modes. At this rate, it achieves 61.5dB SINAD at 100kHz input frequency and maintains full-linearity bandwidth of 0.5MHz. Conversion time is 333ns in externally clocked mode with 48MHz SCLK, enabling tight timing control in closed-loop systems.

Does MAX11332ATJ+ support differential input configurations?

Yes, MAX11332ATJ+ supports fully differential input pairs (4 channels), pseudo-differential inputs (8 channels referenced to REF-/AIN15), and single-ended inputs (8 channels). Each channel can be configured independently in software. The device guarantees ±0.4 LSB INL and ±0.4 LSB DNL in differential mode with no missing codes across the operating temperature range.

How does the SampleSet feature work in MAX11332ATJ+?

The SampleSet feature in MAX11332ATJ+ is a user-programmable 256-entry channel sequencer that operates in external clock mode. It allows defining custom sampling orders-including repeated, skipped, or interleaved channels-at runtime without MCU involvement. This reduces communication overhead and enables mixed-rate acquisition (e.g., fast current + slow temperature) while maintaining deterministic timing.

What are the power supply requirements for MAX11332ATJ+?

MAX11332ATJ+ requires two independent supplies: VDD (2.35V–3.6V) for analog circuitry and OVDD (1.5V–3.6V) for digital I/O. It draws 5.1mA–6.5mA at 3Msps, resulting in 15.2mW dissipation at 3V. Full shutdown reduces current to 2µA. Separate DGND and AGND pins must be connected to a common ground plane with low-impedance paths.

Can MAX11332ATJ+ operate with an external reference voltage?

Yes, MAX11332ATJ+ accepts a differential external reference via REF+ (1V to VDD + 50mV) and REF- (-0.3V to +1V). This enables ratiometric measurements, improved accuracy over temperature, and compatibility with precision reference ICs like MAX6126. Reference current is 110µA at 3Msps with 2.5V reference, requiring appropriate bypassing (0.47µF to GND).