Analog Devices Inc./Maxim Integrated MAX11627EEE+T

Overview

MAX11627EEE+T from Maxim Integrated is a 12-bit, 300ksps serial-output analog-to-digital converter with integrated 2.5V reference, 4-channel single-ended analog multiplexer, on-chip 16-entry FIFO, and AutoShutdown™. It operates from a +2.7V to +3.6V supply, supports SPI/QSPI/MICROWIRE interfaces up to 10MHz, and delivers ±1 LSB INL/DNL accuracy over –40°C to +85°C - enabling high-precision system supervision in space-constrained industrial sensor nodes.

For engineers reviewing the MAX11627EEE+T datasheet, MAX11627EEE+T pinout, MAX11627EEE+T application, or MAX11627EEE+T equivalent, this page provides verified electrical specifications, validated pin functions, confirmed operating conditions, real-world use-case implementation guidance, and two technically documented alternative parts for design flexibility.

Technical Context

The MAX11627EEE+T implements a successive-approximation register (SAR) architecture with integrated track-and-hold, supporting unipolar 0V to 2.5V input range referenced to GND. Its internal 4.4MHz oscillator enables internally clocked conversions in modes 00/01/10, while mode 11 accepts external SCLK up to 4.8MHz for full 300ksps throughput.

It features configurable scan sequencing, per-channel averaging (1–16 samples), and FIFO-based burst acquisition - allowing autonomous multi-channel sampling without CPU intervention. The 16-entry FIFO buffers complete 12-bit results (MSB-first, zero-padded to 16 bits), reducing serial bus contention during high-rate data capture.

Key Specifications

Pinout & Package

MAX11627EEE+T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), RoHS-compliant and lead(Pb)-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.

Compared with ADS7953IRHBT and AD7476ARTZ-REEL7, the MAX11627EEE+T uniquely integrates FIFO, internal reference, and hardware-triggered scan modes - reducing external component count and firmware complexity for compact, low-power 4-channel monitoring designs.

Availability

MAX11627EEE+T is available at Aetrix Electronics and suitable for system supervision, portable data-acquisition, and industrial control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX11627EEE+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 MAX11627EEE+T belongs to the MAX11626–MAX11633 family of low-power, FIFO-equipped SAR ADCs - engineered specifically for embedded system monitoring where integration, accuracy, and ultra-low standby current are essential.

FAQ

What is the maximum sampling rate achievable with MAX11627EEE+T using its internal clock?

The MAX11627EEE+T achieves up to 300ksps only when using an external 4.8MHz SCLK in clock mode 11. With its internal 4.4MHz oscillator (modes 00/01/10), the maximum sustained sampling rate is 100ksps due to conversion time and FIFO readout overhead. This limitation is inherent to the internal timing architecture and is specified in the Electrical Characteristics table under "Conversion Time".

Does MAX11627EEE+T support differential input configurations?

No, the MAX11627EEE+T supports only single-ended analog inputs (AIN0–AIN3) referenced to GND. Its internal architecture uses a true differential track-and-hold stage, but the negative input is hardwired to GND - resulting in unipolar 0V to VREF operation. Differential measurements require external signal conditioning or a dedicated differential-input ADC such as the MAX11623.

Can the internal 2.5V reference of MAX11627EEE+T be used as a precision voltage source for external circuitry?

No - the internal 2.5V reference of MAX11627EEE+T is not designed to drive external loads. Its output resistance is 6.5kΩ and it delivers only enough current for internal ADC operation. Connecting external circuitry will cause significant voltage droop and degrade ADC accuracy. For external reference use, a buffered precision reference like the MAX6126 should be employed.

How does the FIFO in MAX11627EEE+T behave when full and new conversions are requested?

When the 16-entry FIFO of MAX11627EEE+T is full and additional conversions are requested, the oldest stored result is overwritten by the newest conversion result - implementing a circular buffer. This behavior is explicitly documented in the "Internal FIFO" section of the datasheet and ensures continuous data capture without interrupting acquisition, though firmware must read results before overflow to avoid data loss.

What is the recommended decoupling for the REF pin of MAX11627EEE+T?

The REF pin of MAX11627EEE+T must be bypassed to GND with a 0.1µF ceramic capacitor placed as close as possible to the pin. This is mandatory per the Absolute Maximum Ratings and Typical Operating Characteristics sections. Omitting or misplacing this capacitor causes reference instability, increased noise, and degraded SINAD performance - particularly evident in dynamic testing above 10kHz.