Analog Devices Inc./Maxim Integrated MAX11624EEG+T

Overview

MAX11624EEG+T from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with 16 single-ended input channels, internal 4.096V reference, on-chip 16-entry FIFO, and SPI/QSPI/MICROWIRE-compatible 3-wire interface. It operates from a +4.75V to +5.25V supply and is used in industrial process monitoring where multichannel voltage digitization with low software overhead is required.

For engineers reviewing the MAX11624EEG+T datasheet, MAX11624EEG+T pinout, MAX11624EEG+T application, or MAX11624EEG+T equivalent, key selection considerations include unipolar input range (0–VREF), ±1 LSB INL/DNL accuracy over –40°C to +85°C, internal clock mode support, AutoShutdown™ current reduction, and 24-pin QSOP package compatibility with high-density PCB layouts.

Technical Context

The MAX11624EEG+T implements a successive-approximation register (SAR) architecture with integrated track-and-hold, supporting unipolar single-ended inputs only. Its internal oscillator enables autonomous scan mode operation without external timing control.

It features configurable clock modes (CKSEL[1:0]) for conversion triggering-via CNVST/AIN15 pin (mode 00/01), serial interface write (mode 10), or externally clocked acquisition (mode 11)-and supports internal averaging across up to 16 samples per result to improve effective resolution.

Key Specifications

Pinout & Package

MAX11624EEG+T is housed in a 24-pin QSOP package (5.3mm × 7.2mm, 0.65mm pitch), optimized for thermal performance (θJA = 88°C/W) and board space efficiency in industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8684IPWR and AD7949BCPZ-RL7, the MAX11624EEG+T offers unique integration of 10-bit accuracy, 16-channel count, on-chip FIFO, and internal reference in a mature 24-QSOP package-reducing design risk and qualification time for industrial monitoring systems requiring proven reliability over extended temperature ranges.

Availability

MAX11624EEG+T is available at Aetrix Electronics and suitable for industrial control systems, patient monitoring devices, and data-acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX11624EEG+T 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 high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.

The MAX116xx family was designed specifically for low-power, multichannel system supervision and data-acquisition tasks-emphasizing integration of reference, FIFO, and flexible timing to minimize external components and firmware burden.

FAQ

What is the maximum sampling rate achievable with the MAX11624EEG+T?

The MAX11624EEG+T achieves a maximum sampling rate of 300ksps when using an external clock source at up to 10MHz. This rate applies to single-channel conversions; in scan mode across all 16 channels, the effective per-channel rate depends on programmed averaging and FIFO management. The internal oscillator limits clock mode 00/01/10 to ~270ksps aggregate throughput.

Does the MAX11624EEG+T support differential input configurations?

No, the MAX11624EEG+T supports single-ended analog inputs only. Its internal architecture uses a grounded negative input capacitor (Figure 3), and all 16 channels (AIN0–AIN15) are referenced to GND. True differential or pseudo-differential modes are not implemented; external signal conditioning is required for differential source interfacing.

How does the internal FIFO operate in the MAX11624EEG+T?

The MAX11624EEG+T contains a 16-entry FIFO that stores complete 10-bit conversion results (padded to 16 bits). When enabled, it autonomously buffers conversions triggered by internal timing or CNVST pulses. Reading via DOUT retrieves the oldest entry first; overflow overwrites the oldest data. FIFO status is not directly readable-software must track fill level based on conversion count and read timing.

Can the MAX11624EEG+T use an external reference voltage?

Yes, the MAX11624EEG+T accepts an external reference voltage applied to the REF pin, ranging from 1.0V to VDD. When using an external reference, the internal 4.096V reference is disabled. Designers must ensure the external reference meets noise (<200µVRMS) and PSRR (–70dB) requirements specified in the datasheet to maintain ±1 LSB accuracy.

What is the purpose of the CNVST/AIN15 pin on the MAX11624EEG+T?

The CNVST/AIN15 pin on the MAX11624EEG+T is a dual-function terminal: it serves as either the 16th analog input (AIN15) or an active-low conversion start trigger (CNVST), depending on the CKSEL configuration in the setup register. In clock mode 00 or 01, it acts as CNVST to initiate conversions without serial bus activity; in other modes, it functions as AIN15.