ADS7138IRTET

Analog To Digital Converters (ADC) Overview

The ADS7138IRTET is an 8-channel, multiplexed, 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments. It features a compact 3-mm × 3-mm WQFN-16 package and supports I2C communication with up to 3.4 MHz high-speed mode. The device operates with an analog supply voltage range of 2.35 V to 5.5 V and a digital supply voltage range of 1.65 V to 5.5 V. It includes an internal oscillator, programmable averaging filters for 16-bit resolution output, and built-in cyclic redundancy check (CRC) for data integrity. The channels are configurable as analog inputs or general-purpose I/Os.

Analog To Digital Converters (ADC) Feature Summary

• Eight independent channels configurable as analog inputs, digital inputs, or digital outputs
• Built-in digital window comparator with programmable thresholds and event counters for analog watchdog functionality
• Integrated cyclic redundancy check (CRC) module for verifying data read/write operations and power-up configuration
• Programmable averaging filter providing enhanced 16-bit resolution output through oversampling

Analog To Digital Converters (ADC) Applications

• Automotive center information displays
• Mobile robot CPU boards
• Rack servers
• Intra-DC interconnect (metro)

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'IRTET' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the component meets RoHS compliance standards and AEC-Q100 qualification requirements if intended for automotive applications. Ensure the selected variant matches the thermal pad specifications for proper heat dissipation in the target PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-channel ADC with flexible GPIO capabilities and I2C connectivity is required. Consider the ADS7138 for designs needing integrated analog watchdog features and CRC error checking without external logic. Evaluate the trade-off between the 12-bit native resolution and the 16-bit averaged resolution based on system noise requirements and throughput constraints.

Analog To Digital Converters (ADC) Part Context

The ADS7138 belongs to the ADS7138 family of small, multi-channel ADCs from Texas Instruments. It shares the same core architecture and pinout with the ADS7138-Q1, which is qualified for automotive use. Unlike the ADS7128, this model does not include zero-crossing detection or root-mean-square modules, focusing instead on general-purpose signal acquisition and GPIO expansion within a minimal footprint.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7138-Q1: Automotive-grade version with identical electrical characteristics and pinout.