Analog Devices Inc./Maxim Integrated MAX11143ATI+T

Overview

MAX11143ATI+T from Maxim Integrated is a 8-bit, 16-channel, 500ksps successive-approximation register (SAR) analog-to-digital converter with external differential reference support, 1.5MHz full-linear bandwidth, and integrated SampleSet channel sequencer. It operates from 2.35V–3.6V, consumes 4.2mW at 500ksps, and targets multichannel data acquisition in battery-powered industrial sensors and portable medical instrumentation.

For engineers reviewing the MAX11143ATI+T datasheet, MAX11143ATI+T pinout, MAX11143ATI+T application, or MAX11143ATI+T equivalent, this page delivers verified electrical specs, TQFN-28 pin mapping, real-world use scenarios for high-speed closed-loop control and battery-powered instruments, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The MAX11143ATI+T implements a SAR architecture with dual clock modes: internal clock (enabling FIFO buffering and on-chip averaging) and external clock (supporting SampleSet programmable channel sequencing). Its analog multiplexer supports single-ended, fully differential, and pseudo-differential input configurations across all 16 channels, with software-selectable bipolar ranges (±VREF+/2 or ±VREF+).

It features a 3-wire SPI-/QSPI-/MICROWIRE-compatible serial interface running up to 8MHz, direct 1.5V–3.6V I/O voltage compatibility, AutoShutdown with 2µA full-shutdown current, and guaranteed ±0.15LSB DNL with no missing codes over –40°C to +125°C.

Key Specifications

Pinout & Package

MAX11143ATI+T is housed in a 28-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed pad (EP) requiring direct connection to GND for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit multichannel SAR ADC applications.

Compared with MAX11143ATI+T, ADS7953IRHBT offers higher resolution but no on-chip sequencing or FIFO-increasing firmware load-while AD7476AWYRMZ-RL7 provides minimal size and power but lacks multichannel capability entirely, requiring external MUX and control logic for equivalent functionality.

Availability

MAX11143ATI+T is available at Aetrix Electronics and suitable for industrial sensor hubs, battery-powered ECG monitors, and high-speed closed-loop motor control systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX11143ATI+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 automotive applications.

The MAX11135–MAX11143 family was engineered to deliver low-power, high-channel-count data acquisition in space-constrained, battery-operated systems-emphasizing integration (SampleSet, FIFO), flexibility (input configuration), and robustness (–40°C to +125°C).

FAQ

What is the maximum sampling rate supported by the MAX11143ATI+T?

The MAX11143ATI+T supports a maximum conversion rate of 500ksps in both internal and external clock modes. At this rate, it achieves 4.2mW power dissipation with 3V supply and maintains 49.6dB SINAD at 250kHz input frequency. The device guarantees no pipeline delay and full throughput without latency penalties.

Does the MAX11143ATI+T require an external reference voltage?

The MAX11143ATI+T supports both external and internal reference configurations. When using external reference, REF+ accepts 1V to VDD, and REF− serves as the negative reference or analog input AIN15. No external reference is mandatory-the device operates with VDD as reference-but external reference improves accuracy and enables ratiometric measurements.

How many analog input channels does the MAX11143ATI+T provide, and how are they configured?

The MAX11143ATI+T provides 16 analog input channels (AIN0–AIN13, CNVST/AIN14, REF−/AIN15). All channels are software-configurable as single-ended, fully differential, or pseudo-differential, with bipolar ranges selectable via the RANGE bit. This flexibility allows unified signal conditioning across diverse sensor types without external hardware changes.

What package type and pin count does the MAX11143ATI+T use?

The MAX11143ATI+T uses a 28-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed pad (EP). Pinout is identical across the MAX11135–MAX11143 family, enabling drop-in replacement within same channel-count variants. The EP must be soldered to GND for thermal integrity and optimal SNR performance.

Can the MAX11143ATI+T interface directly with a 1.8V microcontroller?

Yes. The MAX11143ATI+T features separate OVDD (1.5V–3.6V) and VDD (2.35V–3.6V) supplies. By setting OVDD = 1.8V, the CS, SCLK, DIN, DOUT, and EOC pins operate at 1.8V logic levels-enabling direct, level-shift-free connection to 1.8V MCUs such as STM32L4 or nRF52840 without external translators.