Analog Devices Inc./Maxim Integrated MAX11136ATI+T

Overview

MAX11136ATI+T from Maxim Integrated is a 12-bit, 500ksps, low-power SAR analog-to-digital converter with 8-channel single-ended or 4-channel fully differential input capability, internal/external clock modes, integrated FIFO, and SampleSet programmable channel sequencing. It operates from 2.35V–3.6V, consumes 4.2mW at full speed, and targets high-accuracy portable data acquisition in industrial and medical instrumentation.

For engineers reviewing the MAX11136ATI+T datasheet, MAX11136ATI+T pinout, MAX11136ATI+T application, or MAX11136ATI+T equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply-ready availability details - all grounded in the official MAX11135–MAX11143 datasheet (Rev 1, July 2012).

Technical Context

The MAX11136ATI+T implements a successive-approximation register (SAR) architecture with 1.5MHz full-linear bandwidth and 50MHz full-power bandwidth, enabling undersampling of signals up to 250kHz while maintaining ≥70dB SINAD. It supports both internal clock mode (with 16-entry FIFO and configurable averaging) and external clock mode (with SampleSet technology for user-defined 256-step channel sequences).

Its analog front-end allows per-channel configuration as single-ended, pseudo-differential, or fully differential inputs, with two software-selectable bipolar ranges (±VREF+/2 or ±VREF+) and unipolar range (0 to VREF+). The device uses an external differential reference (1V to VDD), features ±1 LSB INL/DNL over –40°C to +125°C, and achieves 70dB SINAD at 250kHz input frequency.

Key Specifications

Pinout & Package

MAX11136ATI+T is housed in a 28-pin, 5mm × 5mm TQFN package with exposed pad (EP), optimized for thermal performance and PCB space efficiency in compact systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8686SIPWR and AD7928BRUZ, the MAX11136ATI+T uniquely combines 12-bit precision, 500ksps throughput, integrated FIFO, SampleSet programmability, and sub-5mW power - making it optimal for autonomous, low-power, multichannel sensor hubs where firmware offload and battery life are decisive.

Availability

MAX11136ATI+T is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical sensors, automotive cabin control, and smart energy meters requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing.

Supply support for MAX11136ATI+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 MAX11135–MAX11143 family was designed to deliver high-speed, low-power, multichannel data acquisition in space-constrained, battery-operated, or thermally demanding systems - emphasizing integration, configurability, and ease of controller interface.

FAQ

What is the maximum sampling rate of the MAX11136ATI+T, and how is it achieved?

The MAX11136ATI+T achieves a maximum sampling rate of 500ksps in both internal and external clock modes. In internal clock mode, conversion time is fixed at 5.9µs; in external clock mode, it requires 16 SCLK cycles at up to 8MHz. This rate is sustained across all 8 channels in scan mode, with timing guaranteed over –40°C to +125°C per the datasheet's electrical characteristics table. The MAX11136ATI+T does not support oversampling beyond 500ksps.

Does the MAX11136ATI+T support differential input configurations, and how many channels are available in that mode?

Yes, the MAX11136ATI+T supports fully differential input mode, providing 4 differential channel pairs (AIN0–AIN1, AIN2–AIN3, AIN4–AIN5, AIN6–AIN7) within its 8-input structure. Each pair shares a common sampling aperture and track/hold, ensuring matched timing and gain. The device also supports pseudo-differential mode relative to AIN15 and single-ended mode on all 8 inputs - all configurable per channel via internal registers.

What power-saving features does the MAX11136ATI+T offer, and what is its shutdown current?

The MAX11136ATI+T offers AutoShutdown, full shutdown, and AutoStandby modes. In full shutdown, it draws just 1.5µA to 6µA (typical 2µA) from VDD. AutoShutdown automatically enters low-power state between conversions when idle, while AutoStandby reduces current to ~0.9mW at 2.35V. These features enable multi-day battery life in portable instruments - a key design goal confirmed in the "Longer Battery Life for Portable Applications" section of the datasheet.

Can the MAX11136ATI+T interface directly with a 1.8V microcontroller, and what voltage supplies are required?

Yes, the MAX11136ATI+T can interface directly with 1.8V microcontrollers because its OVDD pin accepts 1.5V–3.6V digital I/O supply, decoupled from the 2.35V–3.6V analog VDD supply. This allows the serial interface (CS, SCLK, DIN, DOUT, EOC) to operate at 1.8V logic levels without external level shifters - a feature explicitly called out in the "1.5V to 3.6V Wide Range I/O Supply" benefit list and verified in the Digital Inputs/Outputs electrical characteristics tables.

What is the purpose of the SampleSet feature in the MAX11136ATI+T, and how does it reduce system overhead?

The SampleSet feature in the MAX11136ATI+T is a user-programmable 256-step analog input channel sequencer that executes autonomously in external clock mode. Once loaded, it cycles through defined channels - including repeats, skips, and mixed sampling rates - without CPU intervention. This eliminates continuous SPI polling, reduces system-level noise from frequent bus activity, and frees the microcontroller for computation or sleep, directly addressing the "alleviating significant microcontroller or DSP communication overhead" design objective stated in the General Description.