Analog Devices Inc./Maxim Integrated MAX11612EUA+T

Overview

The MAX11612EUA+T from Maxim Integrated is a 12-bit, 4-channel, I²C-compatible analog-to-digital converter with internal track/hold, 4.096V reference, and single-supply operation from 4.5V to 5.5V. It delivers 94.4ksps throughput at 670µA supply current, supports unipolar/bipolar and single-ended/differential input configurations, and targets precision sensing in space-constrained, battery-sensitive systems such as handheld medical instruments and solar-powered remote monitors.

For engineers reviewing the MAX11612EUA+T datasheet, MAX11612EUA+T pinout, MAX11612EUA+T application, or MAX11612EUA+T equivalent, key selection criteria include its 8-pin µMAX® package, I²C high-speed mode (1.7MHz), ±1 LSB INL/DNL accuracy over –40°C to +85°C, software-configurable analog input modes, and ultra-low 0.5µA shutdown current - all critical for low-power embedded data acquisition.

Technical Context

The MAX11612EUA+T employs successive-approximation architecture with fully differential track-and-hold circuitry, enabling accurate sampling of transient signals up to 5MHz full-linear bandwidth. Its internal 4.096V reference provides stable scaling for unipolar 0–VREF or bipolar ±VREF/2 differential ranges, while the I²C interface supports both Fast Mode (400kHz) and High-Speed Mode (1.7MHz) timing compliance.

Conversion is clocked internally (2.8MHz) or externally via SCL, with acquisition time dependent on source impedance and clock rate. The device uses a 12-bit switched-capacitor DAC and includes an internal FIFO with channel-scan mode, allowing autonomous multi-channel sequencing without host intervention during conversion bursts.

Key Specifications

Pinout & Package

The MAX11612EUA+T is housed in an 8-pin µMAX® package (3.0mm × 3.0mm, 0.8mm height), optimized for high-density PCB layouts in portable electronics. Pin assignments are validated per Maxim's official datasheet Rev 4 (19-4561).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit, I²C ADC applications.

Compared with the MAX11612EUA+T, the MAX11602EUA+ offers identical integration and package but sacrifices 2 bits of resolution for reduced cost and power, while the ADS7822U lacks internal reference and requires interface redesign - making the MAX11612EUA+T optimal for new designs demanding 12-bit fidelity in compact I²C systems.

Availability

The MAX11612EUA+T is available at Aetrix Electronics and suitable for handheld medical instrumentation, battery-powered test equipment, and solar-powered remote monitoring requiring stable component supply, RoHS-compliant packaging, and guaranteed extended-temperature (-40°C to +85°C) performance.

Supply support for MAX11612EUA+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 MAX11612–MAX11617 family was engineered for ultra-low-power, multi-channel data acquisition in space-constrained portable systems - emphasizing integrated references, I²C efficiency, and seamless transition between sleep and high-speed sampling modes.

FAQ

What is the maximum sampling rate of the MAX11612EUA+T and under what conditions is it achieved?

The MAX11612EUA+T achieves a maximum sampling rate of 94.4ksps when using the external clock mode with I²C SCL running at 1.7MHz. This rate assumes the internal reference is enabled and the device is operating within its specified 4.5V–5.5V supply range at +25°C. At this rate, typical supply current is 670µA, and dynamic performance includes 70dB SINAD and 78dB SFDR.

Does the MAX11612EUA+T support differential input configurations, and how is it configured?

Yes, the MAX11612EUA+T supports fully differential input operation. Configuration is performed via the SGL/DIF bit in the configuration byte: setting SGL/DIF = 0 selects differential mode, where the conversion result equals the difference between two user-selected analog inputs (e.g., AIN0–AIN1). In this mode, the BIP/UNI bit further selects unipolar (0 to VREF) or bipolar (±VREF/2) full-scale range.

Can the MAX11612EUA+T operate with an external reference voltage, and what is the acceptable range?

Yes, the MAX11612EUA+T can operate with an external reference applied to the REF or AIN3/REF pins. The valid external reference range is 1V to VDD (i.e., 1V to 5.5V). When using an external reference, the internal 4.096V reference is disabled, and supply current drops to 670µA at 94.4ksps - matching the internal reference case but offering flexibility for ratiometric or custom scaling needs.

What is the purpose of the AutoShutdown™ feature in the MAX11612EUA+T, and how does it affect power consumption?

The AutoShutdown™ feature automatically powers down the MAX11612EUA+T between conversions, reducing supply current to less than 1µA at low throughput rates and down to 0.5µA in full shutdown mode. This eliminates the need for external power-control circuitry and ensures minimal energy waste during idle periods - critical for extending battery life in intermittent-sampling applications like environmental loggers.

Is the MAX11612EUA+T pin-compatible with other devices in the MAX11612–MAX11617 family, and which variants share the same package?

Yes, the MAX11612EUA+T is pin-compatible with the MAX11613EUA+T, as both use the 8-pin µMAX® package and share identical pin functions (AIN0–AIN3/REF, REF, SCL, SDA, GND, VDD). However, it is not pin-compatible with the 16-pin QSOP or WLP variants (e.g., MAX11614–MAX11617), which support more channels and different pinouts. Layout reuse is possible only between MAX11612EUA+T and MAX11613EUA+T.