ADS1235IRHBT

Overview

The ADS1235IRHBT is a 24-bit, 7.2-kSPS, 6-channel delta-sigma analog-to-digital converter (ADC) designed for precision bridge measurements in automotive applications. It features an integrated PGA with programmable gain from 1 to 128 and a built-in reference. The device operates on a single 5-V analog supply and a 2.7-V to 5.25-V digital supply, consuming only 35 mW of power. It communicates via a standard SPI interface and is housed in a VQFN-32 package. Qualified under AEC-Q100 standards, it supports differential or single-ended inputs across its six channels.

Feature Summary

• Integrated 24-bit delta-sigma ADC architecture with programmable gain amplifier
• Built-in low-drift voltage reference for simplified system design
• AEC-Q100 qualified for automotive reliability requirements
• Supports AC excitation mode to reduce bridge measurement offset and drift

Applications

• Automotive weight sensing systems
• Industrial load cell interfaces
• Precision pressure sensor signal conditioning
• Strain gauge measurement circuits

Procurement Notes

Verify the specific suffix IRHBT against the manufacturer's current datasheet to confirm package type and temperature range. Ensure compatibility with existing PCB footprints for the VQFN-32 package. Check for any recent lifecycle notices or obsolescence warnings directly from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when high-resolution bridge sensor data acquisition is required in automotive environments. Compare channel count and sampling rate against ADS1238 or ADS1261 if higher throughput or additional channels are needed. Verify that the internal reference meets system accuracy requirements without external calibration.

Part Context

This part belongs to the ADS1235 family of precision ADCs optimized for bridge sensors. It shares architectural similarities with the ADS1238 but offers different channel configurations. The Q1 suffix indicates automotive qualification, distinguishing it from commercial variants while maintaining functional pinout compatibility within the series.

Replacement Considerations

ADS1238IRHBR: Pin-compatible alternative with different channel configuration. ADS1261IRHBT: Higher speed option with more channels. Verify electrical parameters and software compatibility before substitution.