Analog Devices Inc./Maxim Integrated MAX11329ATJ+

Overview

MAX11329ATJ+ 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 MAX11329ATJ+ datasheet, MAX11329ATJ+ pinout, MAX11329ATJ+ application, or MAX11329ATJ+ equivalent, key selection criteria include its SampleSet programmable channel sequencing, internal FIFO for burst sampling, ±0.4 LSB INL/DNL accuracy, 61.5dB SINAD at 100kHz, and TQFN-32 package with external multiplexer output access.

Technical Context

The MAX11329ATJ+ implements a successive approximation register (SAR) architecture with dual clock modes: internal clock (enabling FIFO buffering and on-chip averaging) and external clock (supporting SampleSet user-defined channel sequencing up to 256 entries). It features true differential track-and-hold after the integrated 8-channel analog multiplexer.

Analog inputs are configurable per channel as single-ended, fully differential, or pseudo-differential relative to REF−/AIN15, with two software-selectable bipolar ranges (±VREF+/2 or ±VREF+). The device provides direct external access to both the multiplexer output (AOP/AON) and ADC input nodes (AIP/AIN), enabling flexible external signal conditioning before digitization.

Key Specifications

Pinout & Package

MAX11329ATJ+ is housed in a 32-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed pad (EP) requiring connection to GND for thermal and electrical performance. Pin functions are validated per Maxim's official pin configuration diagram for the 8-channel variant (MAX11329/MAX11330).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8684IPWR and AD7928BRUZ, the MAX11329ATJ+ uniquely combines 3Msps speed, SampleSet sequencing, and physical access to mux/ADC nodes-making it optimal for systems requiring adaptive multichannel acquisition with external analog optimization.

Availability

MAX11329ATJ+ is available at Aetrix Electronics and suitable for industrial motor control, portable medical devices, high-speed PLC modules, and battery-powered sensor hubs requiring stable component supply and long-term manufacturability.

Supply support for MAX11329ATJ+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, and medical applications.

The MAX11329ATJ+ belongs to Maxim's high-speed, low-power SAR ADC family engineered for multichannel data acquisition systems needing flexible input configuration, external signal conditioning access, and deterministic timing in harsh environments.

FAQ

What is the maximum sampling rate supported by the MAX11329ATJ+?

The MAX11329ATJ+ supports a maximum conversion rate of 3Msps in both internal and external clock modes. In external clock mode with fSCLK = 48MHz, conversion time is 333ns per sample. This enables accurate digitization of signals with up to 500kHz full-linear bandwidth, making the MAX11329ATJ+ suitable for high-speed transient capture and closed-loop control applications.

Does the MAX11329ATJ+ support differential input configurations?

Yes, the MAX11329ATJ+ supports fully differential, single-ended, and pseudo-differential input configurations on all eight analog input channels. In differential mode, AIN0–AIN7 can be paired (e.g., AIN0+/AIN1−), with input voltage difference ranging from −VREF+ to +VREF+. The device guarantees ±0.4 LSB INL/DNL and −88dB crosstalk in this configuration, as verified in the official datasheet's electrical characteristics tables.

How does the SampleSet feature work on the MAX11329ATJ+?

The SampleSet feature on the MAX11329ATJ+ is a user-programmable channel sequencer allowing up to 256 unique analog input sequences. It operates exclusively in external clock mode and offloads channel selection from the host MCU. Once loaded, the MAX11329ATJ+ autonomously cycles through the defined pattern-reducing communication overhead and system-level noise while enabling mixed-rate sampling (e.g., fast temperature + slow pressure reads) without CPU intervention.

What package type and pin count does the MAX11329ATJ+ use?

The MAX11329ATJ+ uses a 32-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed thermal pad (EP). This compact RoHS-compliant package supports high-density PCB layouts and requires EP soldering to GND for optimal thermal performance and EMI suppression. Pin assignments match the 8-channel variant (MAX11329/MAX11330) as confirmed in Maxim's official pin configuration diagrams.

Can the MAX11329ATJ+ operate with a 1.8V I/O supply?

No-the MAX11329ATJ+ requires OVDD (digital I/O supply) between 1.5V and 3.6V, but its minimum functional OVDD is 1.5V. While 1.8V falls within specification, the device's SPI interface is designed for CPOL = CPHA = 1 and 48MHz max clock-so timing margins must be verified at 1.8V using the published tDS/tDH setup/hold values (4ns/1ns respectively). Full 48MHz operation is guaranteed only at OVDD ≥ 2.35V per datasheet characterization.