Analog Devices Inc./Maxim Integrated MAX11625EEG+T

Overview

MAX11625EEG+T from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with 16 single-ended input channels, internal 2.5V reference, on-chip 16-entry FIFO, and SPI/QSPI/MICROWIRE-compatible 3-wire interface. It operates from a +2.7V to +3.6V supply and supports scan mode, internal averaging, and AutoShutdown™ for low-power system supervision in industrial control and patient monitoring.

For engineers reviewing the MAX11625EEG+T datasheet, MAX11625EEG+T pinout, MAX11625EEG+T application, or MAX11625EEG+T equivalent, key selection criteria include unipolar 0–2.5V input range, ±1 LSB INL/DNL accuracy over –40°C to +85°C, 1MHz full-power bandwidth, internal track-and-hold, and 24-pin QSOP package compatibility with space-constrained embedded data-acquisition designs.

Technical Context

The MAX11625EEG+T implements a successive-approximation register (SAR) architecture with integrated track-and-hold, supporting unipolar single-ended conversions referenced to GND. Its internal oscillator enables autonomous conversion timing in clock modes 00, 01, and 10 - eliminating external clock dependency for scan-based acquisition.

It features configurable clock modes (CKSEL[1:0]) that determine conversion initiation method: CNVST-triggered (mode 01), internally timed scans (mode 00/10), or externally clocked high-speed sampling (mode 11, up to 300ksps). The 16-deep FIFO buffers results independently of serial bus activity, enabling burst acquisition without host intervention.

Key Specifications

Pinout & Package

MAX11625EEG+T is housed in a 24-pin QSOP package (5.3mm × 7.2mm, 0.635mm pitch), optimized for thermal performance (θJA = 88°C/W) and PCB density in industrial modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit multichannel ADC applications.

Compared with ADS7953IRHBT and AD7476ARTZ-REEL7, MAX11625EEG+T uniquely integrates 16-channel multiplexing, 2.5V internal reference, and 16-deep FIFO in a 24-pin QSOP - delivering lowest component count and smallest footprint for cost-sensitive, space-constrained 10-bit data-acquisition systems.

Availability

MAX11625EEG+T is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, and environmental data logging requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX11625EEG+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.

The MAX116xx family targets low-power, multichannel data-acquisition systems where integration of FIFO, internal reference, and flexible clocking reduces system complexity and improves reliability in harsh environments.

FAQ

What is the maximum sampling rate achievable with MAX11625EEG+T?

The MAX11625EEG+T achieves a maximum sampling rate of 300ksps when using an externally supplied clock signal up to 10MHz. This rate is attainable only in clock mode 11 (CKSEL=11), which disables scan mode and internal averaging. In internally clocked modes (00, 01, 10), the effective sampling rate is lower due to oscillator tolerance and overhead, typically ~270ksps under nominal conditions. The MAX11625EEG+T datasheet specifies timing parameters including tCONV and tACQ to ensure reliable operation at this rate.

Does MAX11625EEG+T require an external reference voltage?

No, MAX11625EEG+T does not require an external reference voltage because it includes a factory-trimmed internal 2.50V reference with ±0.02V initial accuracy and ±30ppm/°C temperature coefficient. The REF pin can be used to output this reference for biasing external circuitry or bypassed with a 0.1µF capacitor to GND. An external reference between 1.0V and VDD may be applied if higher precision or different full-scale range is needed, but doing so disables the internal reference and increases system component count.

How many analog input channels does MAX11625EEG+T support?

MAX11625EEG+T supports 16 single-ended analog input channels: AIN0 through AIN14 (pins 1–15), plus CNVST/AIN15 (pin 16) configured as the 16th input via the setup register. All channels accept unipolar 0–2.5V signals when using the internal reference. Channel selection is software-controlled through the conversion register, enabling flexible scan sequences and individual channel readout without external hardware multiplexers.

What package type is used for MAX11625EEG+T?

MAX11625EEG+T is packaged in a 24-pin QSOP (Quarter-Size Outline Package) with dimensions of 5.3mm × 7.2mm and 0.635mm lead pitch. This RoHS-compliant, lead-free package provides adequate thermal dissipation (θJA = 88°C/W) for industrial applications and is compatible with standard surface-mount assembly processes. The "+T" suffix denotes tape-and-reel packaging for automated manufacturing.

Can MAX11625EEG+T operate from a 3.3V supply?

Yes, MAX11625EEG+T is fully specified to operate from a +2.7V to +3.6V supply, making it compatible with standard 3.3V logic and power domains. At VDD = 3.0V, it maintains all key specifications including ±1 LSB INL/DNL, 62dB SINAD, and 300ksps maximum sampling rate. Supply current is 1050–1200µA (typ) at 300ksps with internal reference enabled, and drops to ≤0.8µA in AutoShutdown™ mode - ideal for battery-powered 3.3V systems.