Analog Devices Inc./Maxim Integrated MAX11328ATJ+

Overview

MAX11328ATJ+ from Maxim Integrated is a 12-bit, 16-channel SAR analog-to-digital converter with post-mux external signal conditioning access, 1Msps conversion rate, ±1 LSB INL/DNL, 70dB SINAD at 100kHz, and operates from 2.35V–3.6V supply. It supports single-ended, fully differential, and pseudo-differential inputs and is used in high-speed industrial data acquisition systems requiring low power and flexible channel sequencing.

For engineers reviewing the MAX11328ATJ+ datasheet, MAX11328ATJ+ pinout, MAX11328ATJ+ application, or MAX11328ATJ+ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional differences, and supply-chain support for production deployment.

Technical Context

The MAX11328ATJ+ implements a successive approximation register (SAR) architecture with integrated multiplexer output (AOP/AON) and ADC input (AIP/AIN) pins exposed externally to enable inline signal conditioning-e.g., filtering or gain staging-between mux and ADC core. It supports both internal clock mode (with 16-entry FIFO and programmable averaging) and external clock mode (with SampleSet™ technology for user-defined 256-step channel sequences).

Its analog front-end allows per-channel configuration of input type (single-ended/differential/pseudo-differential) and bipolar range selection (±VREF+/2 or ±VREF+), while the 3-wire SPI/QSPI/MICROWIRE-compatible interface runs at up to 48MHz with CPOL=CPHA=1 and supports channel-ID tagging in output data frames.

Key Specifications

Pinout & Package

MAX11328ATJ+ is housed in a 32-pin, 5mm × 5mm TQFN package with exposed pad (EP), rated for –40°C to +125°C operation. Pin functions are validated per Maxim's official pin description table for the 16-channel variant (MAX11327/MAX11328).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8688IPWR and AD7960BCPZ, the MAX11328ATJ+ uniquely combines 16-channel count, 12-bit resolution, post-mux signal access, and SampleSet™ sequencing-making it optimal for compact, low-power, multichannel systems needing on-the-fly reconfiguration without MCU intervention.

Availability

MAX11328ATJ+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, high-speed closed-loop control, and automated test equipment requiring stable component supply and guaranteed long-term sourcing.

Supply support for MAX11328ATJ+ 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, medical, and communications applications, emphasizing integration, low power, and robust performance.

The MAX11321–MAX11328 product line was engineered to address multichannel data acquisition challenges in space-constrained, battery-sensitive systems-delivering post-mux signal access, flexible input configurations, and intelligent sequencing in a single 32-pin TQFN package.

FAQ

What is the maximum sampling rate supported by the MAX11328ATJ+?

The MAX11328ATJ+ supports a maximum conversion rate of 1Msps in both internal and external clock modes. At this rate, typical power dissipation is 5.4mW with a 3V supply. Conversion time is 5.9µs in internal clock mode and 1000ns in externally clocked mode with 16MHz SCLK-enabling deterministic timing for real-time control loops. The MAX11328ATJ+ achieves this without pipeline delay, preserving signal integrity for transient capture.

Does the MAX11328ATJ+ support differential input configurations?

Yes, the MAX11328ATJ+ supports fully differential inputs across up to 12 channels, as well as pseudo-differential and single-ended modes. Its AIP/AIN pins accept true differential signals referenced to either ±VREF+/2 or ±VREF+, and the analog input common-mode range spans –0.1V to VREF+ + 0.1V. This capability is validated in the datasheet's dynamic performance section, where 70dB SINAD is specified under fully differential 100kHz sine-wave testing.

How does the SampleSet™ feature work in the MAX11328ATJ+?

SampleSet™ is a user-programmable channel sequencer in the MAX11328ATJ+ that allows defining custom 256-step acquisition sequences-including repeated, skipped, or interleaved channels-stored in internal memory. It operates in external clock mode and reduces microcontroller overhead by autonomously executing sequences without host intervention. Each step can configure input type, range, and gain, making the MAX11328ATJ+ ideal for heterogeneous sensor arrays with varying bandwidth and amplitude requirements.

What package type and thermal characteristics does the MAX11328ATJ+ have?

The MAX11328ATJ+ uses a 32-pin, 5mm × 5mm TQFN package with exposed pad (EP), rated for –40°C to +125°C operation. Its junction-to-ambient thermal resistance (θ_JA) is 29°C/W on a four-layer board per JEDEC JESD51-7. The EP must be soldered directly to the PCB ground plane to ensure thermal performance and signal integrity. Absolute maximum ratings include VDD-to-GND of –0.3V to +4V and 300°C lead temperature for 10 seconds.

Can the MAX11328ATJ+ operate with an external reference voltage?

Yes, the MAX11328ATJ+ accepts an external differential reference via REF+ (1V to VDD + 50mV) and REF–/AIN15 (–0.3V to +1V). REF+ draws only 36.7µA at 1Msps with a 2.5V reference, enabling stable low-drift operation. The device supports unipolar and bipolar input ranges based on the RANGE bit setting, and reference rejection is characterized at 0.3 LSB/V. External reference usage is mandatory for achieving full 12-bit accuracy across temperature.