Analog Devices Inc./Maxim Integrated MAX11629EEE+T

Overview

The MAX11629EEE+T from Maxim Integrated is a 12-bit, 8-channel, single-ended SAR analog-to-digital converter with internal 2.5V reference, 16-entry FIFO, scan mode, and AutoShutdown™. It operates from a +2.7V to +3.6V supply, achieves up to 300ksps sampling rate with external clocking, and features SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. It is used in patient monitoring systems for high-accuracy, low-power analog signal digitization of biopotential or sensor inputs.

For engineers reviewing the MAX11629EEE+T datasheet, MAX11629EEE+T pinout, MAX11629EEE+T application, or MAX11629EEE+T equivalent, key selection considerations include its 8-channel count, internal 2.5V reference accuracy (±30 ppm/°C), ±1 LSB INL/DNL over temperature, FIFO-based burst acquisition capability, and QSOP-16 package compatibility with space-constrained medical and industrial PCB layouts.

Technical Context

The MAX11629EEE+T implements a successive-approximation register (SAR) architecture with integrated track-and-hold, supporting unipolar 0–2.5V input range referenced to GND. Its internal oscillator enables autonomous conversions in clock modes 00/01/10, while clock mode 11 supports externally timed acquisitions at up to 4.8MHz SCLK.

It integrates a 16-deep FIFO buffer that decouples conversion and readout timing, allowing continuous sampling without serial bus contention. Channel selection, averaging depth (1–16 samples), and scan configuration are programmable via its 8-bit SPI-compatible register set, with dedicated setup, conversion, averaging, and reset registers.

Key Specifications

Pinout & Package

The MAX11629EEE+T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7957IRHBT and AD7476AWUMZ-REEL, the MAX11629EEE+T provides integrated 2.5V reference, 16-deep FIFO, and AutoShutdown™-reducing component count, simplifying layout, and lowering total system power in battery-operated multi-sensor applications.

Availability

The MAX11629EEE+T is available at Aetrix Electronics and suitable for medical device manufacturing, industrial sensor node deployment, and embedded system supervision requiring stable component supply and long-term lifecycle assurance.

Supply support for MAX11629EEE+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 MAX11629EEE+T belongs to the MAX11626–MAX11633 family of low-power, multichannel SAR ADCs designed specifically for system monitoring, portable instrumentation, and medical data acquisition where integration, accuracy, and power efficiency are critical.

FAQ

What is the maximum sampling rate achievable with the MAX11629EEE+T?

The MAX11629EEE+T achieves a maximum sampling rate of 300ksps when using an external clock source (SCLK up to 4.8MHz in clock mode 11). Internally clocked operation yields lower rates due to oscillator tolerance (±10% of 4.4MHz), limiting practical throughput to approximately 250ksps in autonomous scan modes. The MAX11629EEE+T's 300ksps rating assumes optimal timing conditions and full utilization of its FIFO buffer.

Does the MAX11629EEE+T require an external reference voltage?

No, the MAX11629EEE+T includes a factory-trimmed internal 2.5V reference with ±2% initial accuracy and ±30 ppm/°C temperature coefficient, eliminating the need for external reference components. An external reference (1V to VDD) may be applied via the REF pin if higher precision or different full-scale range is required, but doing so disables the internal reference and increases system complexity.

How many analog input channels does the MAX11629EEE+T support?

The MAX11629EEE+T supports exactly 8 single-ended analog input channels (AIN0 through AIN7). This is confirmed in the ordering table and functional description: MAX11628/MAX11629 have 8 channels, packaged in 16-pin QSOP. AIN8–AIN15 are exclusive to the 24-pin MAX11632/MAX11633 variants and are not implemented in the MAX11629EEE+T.

What package type is used for the MAX11629EEE+T?

The MAX11629EEE+T is supplied in a 16-pin QSOP (Quarter Size Outline Package) with 0.65mm lead pitch, measuring 5.3mm × 10.2mm. The "EEE" suffix in the part number explicitly denotes this QSOP package, and the datasheet confirms all MAX11626–MAX11629 variants use the 16-pin QSOP form factor.

Can the MAX11629EEE+T operate from a 3.3V supply?

Yes, the MAX11629EEE+T is fully specified for operation from +2.7V to +3.6V, making it compatible with standard 3.3V logic and power domains. Its supply current is 1.75–2.0mA typical at 300ksps with internal reference, and it maintains ±1 LSB INL/DNL performance across the entire voltage and temperature range (-40°C to +85°C).