Analog Devices Inc./Maxim Integrated MAX11615EWE+T

Overview

MAX11615EWE+T from Maxim Integrated is a low-power, 12-bit, 8-channel I²C-compatible analog-to-digital converter with internal 2.048V reference, 94.4ksps max sampling rate, and ultra-small 2.14mm × 2.0mm 16-bump wafer-level package. It operates from 2.7V–3.6V, draws only 670µA at full speed, and supports software-configurable unipolar/bipolar and single-ended/differential input modes for precision sensor interfacing in space-constrained portable systems.

For engineers reviewing the MAX11615EWE+T datasheet, MAX11615EWE+T pinout, MAX11615EWE+T application, or MAX11615EWE+T equivalent, key selection considerations include its 12-bit resolution with ±1 LSB INL/DNL, I²C high-speed mode (1.7MHz), internal track/hold, FIFO-enabled channel-scan operation, and guaranteed -40°C to +85°C performance - all critical for battery-powered medical instrumentation and remote monitoring designs.

Technical Context

The MAX11615EWE+T implements successive-approximation ADC architecture with fully differential track-and-hold circuitry and a switched-capacitor DAC. Its internal 2.048V reference is stable over temperature (25ppm/°C) and supply voltage, enabling accurate conversions without external components.

It features dual clocking modes: internal 2.8MHz oscillator or external I²C clock, with conversion time of 10.6µs using external clocking. The analog input multiplexer supports 8 single-ended or 4 fully differential channels, with programmable acquisition timing and 5MHz small-signal bandwidth for transient capture.

Key Specifications

Pinout & Package

The MAX11615EWE+T is housed in a 2.14mm × 2.0mm, 16-bump wafer-level package (WLP) with bottom-side solder balls. This ultra-compact, lead-free RoHS-compliant package supports fine-pitch PCB assembly and thermal performance suitable for handheld and wearable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7957IRGER and AD7091R-8BCPZ, the MAX11615EWE+T uniquely combines ultra-compact WLP packaging, 2.048V reference optimized for 1mV/LSB scaling, and AutoShutdown™ for sub-1µA standby - making it optimal for size- and energy-constrained I²C-based sensor nodes.

Availability

MAX11615EWE+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered test equipment, and solar-powered remote systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant ultra-miniature packaging.

Supply support for MAX11615EWE+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 product line was engineered specifically for ultra-low-power, space-constrained sensor signal chains requiring integrated reference, track/hold, and high-speed I²C connectivity - targeting handheld, wearable, and remote monitoring systems.

FAQ

What is the maximum sampling rate of the MAX11615EWE+T, and under what conditions is it achieved?

The MAX11615EWE+T achieves a maximum sampling rate of 94.4ksps when using the external clock mode with I²C high-speed mode (1.7MHz SCL). This rate assumes continuous conversion with internal reference enabled and VDD = 3.3V. At this rate, supply current is 670µA (typical), and dynamic performance includes 70dB SINAD and 78dB SFDR. Lower rates reduce current consumption proportionally - e.g., 1ksps draws only 6µA.

Does the MAX11615EWE+T support differential input configurations, and how many differential channels are available?

Yes, the MAX11615EWE+T supports fully differential input operation. In differential mode, it provides 4 independent differential input pairs (AIN0–AIN1, AIN2–AIN3, AIN4–AIN5, AIN6–AIN7), selectable via the configuration register. Each pair delivers true differential measurement with common-mode rejection, and the full-scale range is software-configurable as either 0 to VREF (unipolar) or ±VREF/2 (bipolar).

What is the function of the AIN11/REF pin on the MAX11615EWE+T, and how should it be configured?

The AIN11/REF pin on the MAX11615EWE+T serves a dual role: it can function as the 12th analog input (AIN11) or as the reference voltage input/output terminal. Configuration is controlled by the SEL[2:1] bits in the setup register. When used as REF, it sources or sinks up to 2mA and must be decoupled with a 0.1µF capacitor and 2kΩ series resistor to GND per the typical operating circuit. When used as AIN11, it behaves identically to other analog inputs with 22pF input capacitance and ±1µA leakage.

How does the AutoShutdown™ feature operate in the MAX11615EWE+T, and what is its impact on power consumption?

The AutoShutdown™ feature in the MAX11615EWE+T automatically powers down the ADC core, reference, and oscillator between conversions when the I²C bus is idle. It reduces supply current to less than 1µA at low throughput rates (e.g., <1ksps), dropping to 0.5µA in full shutdown mode. This behavior is automatic and requires no host intervention - it activates after each conversion completes and the device returns to idle state, significantly extending battery life in intermittently active sensor applications.

Can the MAX11615EWE+T operate with an external reference, and what is the acceptable voltage range?

Yes, the MAX11615EWE+T supports external reference operation. The REF or AIN11/REF pin accepts an externally applied reference voltage ranging from 1V to VDD (2.7V–3.6V). When using an external reference, the internal 2.048V reference is disabled. Performance remains specified - including ±1 LSB INL/DNL and 70dB SINAD - provided the external reference exhibits ≤25ppm/°C drift and low noise (<300µV_P-P). Reference input current is 40µA at 94.4ksps.