Analog Devices Inc./Maxim Integrated MAX11624EEG+

Overview

The MAX11624EEG+ from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with 16 single-ended input channels, internal 4.096V reference, and 16-entry FIFO buffer. It operates from a +4.75V to +5.25V supply, features SPI/QSPI/MICROWIRE-compatible 3-wire interface, and supports scan mode, internal averaging, and AutoShutdown™ for low-power system supervision in industrial control and data-acquisition systems.

For engineers reviewing the MAX11624EEG+ datasheet, MAX11624EEG+ pinout, MAX11624EEG+ application, or MAX11624EEG+ equivalent, key selection considerations include its 16-channel multiplexing capability, guaranteed ±1 LSB INL/DNL over –40°C to +85°C, unipolar 0–VREF input range, 1MHz full-power bandwidth, and 24-pin QSOP package compatibility with high-density PCB layouts.

Technical Context

This SAR ADC integrates an on-chip track-and-hold circuit, internal oscillator (±10% accuracy), and configurable clock modes (00–11) enabling conversion start via CNVST/AIN15 or SCLK-driven external timing. It supports internally timed conversions up to 300ksps with FIFO buffering, eliminating serial bus contention during burst acquisition.

The device uses a unipolar, single-ended architecture referenced to GND with full-scale range 0 to VREF (4.096V). Input protection includes ESD diodes clamping to VDD/GND, and sampling error is characterized vs. source impedance - critical for sensor interfacing with >300Ω sources requiring extended tACQ ≥1.4µs.

Key Specifications

Pinout & Package

MAX11624EEG+ is housed in a 24-pin QSOP package (5.3mm × 7.2mm, 0.635mm pitch), optimized for thermal performance (θJA = 88°C/W) and board space efficiency in compact instrumentation designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7953SRHBT and AD7949BCPZ-RL7, the MAX11624EEG+ uniquely combines 16-channel count, integrated FIFO, AutoShutdown™, and internal reference in a single 24-pin QSOP - reducing BOM count and firmware complexity for embedded monitoring systems.

Availability

MAX11624EEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, and data-logging applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX11624EEG+ 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 communications applications.

The MAX11624EEG+ belongs to Maxim's low-power, multichannel ADC product line engineered specifically for system supervision and data-acquisition tasks where integration, reliability, and ease of microcontroller interfacing are critical.

FAQ

What is the maximum sampling rate achievable with MAX11624EEG+?

The MAX11624EEG+ achieves up to 300ksps when using an externally supplied SCLK up to 10MHz with clock mode 11 enabled. Internally clocked operation yields lower rates due to ±10% oscillator tolerance, and actual sustained throughput depends on FIFO management and host readout latency. The MAX11624EEG+ specification guarantees 300ksps under defined conditions including fSCLK = 4.8MHz and VDD = 4.75V–5.25V.

Does MAX11624EEG+ require an external reference voltage?

No, the MAX11624EEG+ includes a factory-trimmed internal 4.096V reference with ±20ppm/°C temperature coefficient, eliminating the need for external reference components in most applications. An external reference (1.0V to VDD) may be used instead by connecting it to the REF pin and configuring the setup register accordingly - but doing so disables the internal reference and forfeits AutoShutdown™ benefits tied to internal reference power control.

How many analog input channels does MAX11624EEG+ support?

The MAX11624EEG+ supports 16 single-ended analog input channels: AIN0 through AIN14 plus CNVST/AIN15 configured as the 16th input. This is confirmed in the Ordering Information table and Pin Description section, distinguishing it from the 4- and 8-channel variants in the same family. All 16 channels are accessible in the 24-pin QSOP package and can be scanned autonomously using the built-in FIFO and scan mode.

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

The CNVST/AIN15 pin on MAX11624EEG+ is a dual-function terminal: it serves either as an active-low conversion start trigger (CNVST) or as the 16th analog input (AIN15), selected via bit configuration in the setup register. When used as CNVST, it initiates conversions without serial bus interaction; when configured as AIN15, it expands the input count to 16 - but cannot perform both roles simultaneously. This flexibility enables hardware-triggered acquisition or full channel utilization depending on system architecture.

Is MAX11624EEG+ compatible with standard SPI microcontrollers?

Yes, the MAX11624EEG+ features a 3-wire serial interface fully compatible with SPI, QSPI, and MICROWIRE protocols. It supports both CPOL=CPHA=0 and CPOL=CPHA=1 configurations, accepts SCLK up to 10MHz, and uses standard MSB-first data framing. The MAX11624EEG+ requires only CS, SCLK, DIN, and DOUT connections - no additional handshaking lines - and operates reliably with common ARM Cortex-M, PIC, and MSP430 microcontrollers when configured per the timing specifications in the datasheet.