Analog Devices Inc./Maxim Integrated MAX11627EEE+

Overview

MAX11627EEE+ from Maxim Integrated is a 12-bit, 4-channel, single-ended SAR analog-to-digital converter with integrated 2.5V reference, 16-entry FIFO, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates from a +2.7V to +3.6V supply, achieves up to 300ksps sampling rate with external clocking, and features AutoShutdown™ for low-power system supervision in battery-powered instrumentation.

For engineers reviewing the MAX11627EEE+ datasheet, MAX11627EEE+ pinout, MAX11627EEE+ application, or MAX11627EEE+ equivalent, key selection criteria include unipolar 0–2.5V input range, ±1 LSB INL/DNL accuracy over –40°C to +85°C, internal track-and-hold, scan mode support, and 16-pin QSOP package compatibility with space-constrained PCB layouts.

Technical Context

The MAX11627EEE+ implements a successive-approximation register (SAR) architecture with on-chip track-and-hold, supporting unipolar single-ended inputs referenced to GND. Its internal 2.5V reference exhibits ±30ppm/°C temperature coefficient and 200µVRMS output noise.

It supports four clock modes via CKSEL bits: internally timed conversions (modes 00/01/10), externally clocked acquisitions (mode 11), and flexible scan/averaging configurations. The 16-deep FIFO enables burst acquisition without serial bus contention, and EOC signaling provides precise conversion completion timing.

Key Specifications

Pinout & Package

The MAX11627EEE+ 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 ADS7953IRHBT and AD7476ARTZ-REEL7, the MAX11627EEE+ uniquely integrates 4-channel MUX, 2.5V reference, and 16-deep FIFO in a single 16-pin QSOP-reducing total solution size and eliminating reference/mux design validation effort.

Availability

MAX11627EEE+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, remote environmental data logging, and embedded system supervision requiring stable component supply and long-term manufacturability.

Supply support for MAX11627EEE+ 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 MAX11626–MAX11629 family targets low-power, multichannel data acquisition in space- and energy-constrained systems-emphasizing integrated references, FIFO buffering, and flexible clocking to simplify host processor integration.

FAQ

What is the maximum sampling rate achievable with the MAX11627EEE+?

The MAX11627EEE+ achieves up to 300ksps when using an externally supplied clock signal (SCLK) at up to 4.8MHz in clock mode 11. Internally clocked operation supports lower rates-typically ~200ksps-due to ±10% oscillator tolerance. Full performance requires proper source impedance matching (<300Ω) and 0.1µF REF bypassing.

Does the MAX11627EEE+ require an external reference voltage?

No, the MAX11627EEE+ includes a factory-trimmed 2.5V internal reference with ±30ppm/°C temperature coefficient and 200µVRMS noise. An external reference (1V to VDD) may be used instead by setting REFSEL bits in the setup register-but doing so disables the internal reference and forfeits its guaranteed accuracy and stability.

How many analog input channels does the MAX11627EEE+ support, and what are their functions?

The MAX11627EEE+ supports exactly four single-ended analog input channels: AIN0 through AIN3. Unlike higher-channel variants (e.g., MAX11629), pins 5–7 are N.C., and pin 8 is dedicated solely to CNVST-not shared as AIN4–AIN6. All four inputs operate in unipolar mode (0V to VREF) and are internally referenced to GND.

What package type and footprint does the MAX11627EEE+ use?

The MAX11627EEE+ uses a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), RoHS-compliant and lead-free. Its pinout matches other MAX11626–MAX11629 variants, enabling drop-in replacement within the same package family-though electrical differences (e.g., reference voltage, supply range) must be verified before substitution.

Can the MAX11627EEE+ perform automatic channel scanning and averaging?

Yes, the MAX11627EEE+ supports both scan mode and internal averaging via configuration registers. Scan mode sequentially converts AIN0–AIN3 based on NSCAN bits; averaging (up to 128 samples) is enabled via AVGON and NAVG bits. These features operate autonomously using the internal FIFO and clock-freeing the host MCU from timing-critical sampling tasks.