Analog Devices Inc./Maxim Integrated MAX11327ATJ+

Overview

MAX11327ATJ+ from Maxim Integrated is a 10-bit, 16-channel SAR analog-to-digital converter with post-mux external signal conditioning access, 1Msps conversion rate, ±0.4 LSB INL, 61.5dB SINAD at 100kHz, and operation from 2.35V–3.6V supply. It enables flexible multichannel acquisition in battery-powered medical instrumentation and industrial control systems.

For engineers reviewing the MAX11327ATJ+ datasheet, MAX11327ATJ+ pinout, MAX11327ATJ+ application, or MAX11327ATJ+ equivalent, this page delivers verified specifications, real-world interface constraints (e.g., 16MHz SPI-compatible 3-wire interface), confirmed channel configuration modes (single-ended/differential/pseudo-differential), and validated alternatives for high-channel-count, low-power data acquisition.

Technical Context

The MAX11327ATJ+ 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™ programmable channel sequencing up to 256 entries). Its multiplexer output (AOP/AON) and ADC input (AIP/AIN) are externally accessible to allow external signal conditioning between stages-even for differential signals.

It supports three analog input configurations per channel: single-ended (16 channels), pseudo-differential (15 channels relative to common input), or fully differential (12 channel pairs), all selectable via software. Bipolar input ranges (±VREF+/2 or ±VREF+) are controlled by the RANGE bit, and reference voltage is externally supplied (1V to VDD).

Key Specifications

Pinout & Package

MAX11327ATJ+ 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 configuration diagram for the 16-channel variant (MAX11327/MAX11328).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8688IPWR and AD7949BCPZ-RL7, MAX11327ATJ+ uniquely combines 16-channel count, post-mux signal access, and SampleSet™ sequencing-making it the only option that eliminates external muxes *and* reduces host processor load in high-channel, mixed-signal embedded systems.

Availability

MAX11327ATJ+ is available at Aetrix Electronics and suitable for medical patient monitoring, industrial motor control, and battery-powered data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX11327ATJ+ 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, medical, and automotive applications.

The MAX11321–MAX11328 family was engineered specifically for high-channel-count, low-power data acquisition where external signal conditioning flexibility and microcontroller offload are critical-addressing limitations of fixed-architecture ADCs in portable and embedded systems.

FAQ

What is the maximum sampling rate supported by MAX11327ATJ+?

The MAX11327ATJ+ supports a maximum conversion rate of 1Msps in both internal and external clock modes. In external clock mode with fSCLK = 16MHz, conversion time is fixed at 1000ns per sample. Internal clock mode achieves the same 1Msps rate with built-in timing control and optional FIFO buffering. This rate is guaranteed across the full operating temperature range (–40°C to +125°C) and supply voltage range (2.35V–3.6V).

Does MAX11327ATJ+ support differential input configurations?

Yes, MAX11327ATJ+ supports fully differential input pairs (12 channels), pseudo-differential inputs (15 channels relative to a common input), and single-ended inputs (16 channels)-all configurable per channel via software registers. The device accepts true differential signals at AIP/AIN with operational input voltage difference ranging from –VREF+ to +VREF+, and includes dedicated AOP/AON pins to route mux output externally for differential signal conditioning prior to the ADC core.

How does the SampleSet™ feature work in MAX11327ATJ+?

SampleSet™ in MAX11327ATJ+ is a user-programmable channel sequencer that stores up to 256 entries defining the order and configuration (input type, range, gain) for each analog channel conversion. Once loaded, the ADC autonomously executes the sequence without host intervention-reducing SPI traffic and freeing the microcontroller for other tasks. It operates in both internal and external clock modes and is particularly valuable in multirate sampling scenarios like motor control or sensor fusion.

What are the power supply requirements for MAX11327ATJ+?

MAX11327ATJ+ requires two independent supplies: VDD (2.35V–3.6V) for analog circuitry and OVDD (1.5V–3.6V) for digital I/O. Both must be bypassed-VDD with 10μF + 0.1μF capacitors, OVDD similarly. At 3V VDD and 1Msps, typical supply current is 1.8–2.5mA (5.4mW); full shutdown draws only 1.5–6μA. DGND and GND must be connected to separate ground planes and joined at a single point near the device.

Can MAX11327ATJ+ operate with an external reference voltage?

Yes, MAX11327ATJ+ requires an external differential reference: REF+ (1V to VDD) and REF– (–0.3V to +1V). REF+ must be bypassed to GND with a 0.47μF capacitor. Reference current is 36.7μA at 1Msps (VREF+ = 2.5V), dropping to 0.1μA in idle mode. The device supports bipolar input ranges (±VREF+/2 or ±VREF+) and maintains 61.5dB SINAD performance across the full reference voltage range (1.0V–3.4V) per typical characteristics.