ADS1261IRHBT

Overview

The ADS1261IRHBT is a 24-bit, 40-kSPS delta-sigma analog-to-digital converter (ADC) manufactured by Texas Instruments. It features a single sigma-delta modulator with a multiplexer and programmable gain amplifier (PGA). The device supports up to ten differential or twenty single-ended inputs. It operates with an analog supply voltage of ±2.5 V or 5 V, and a digital supply ranging from 2.7 V to 5.25 V. Key integrated peripherals include internal and external reference options, excitation current sources (iDACs), general-purpose I/O pins, an oscillator, and a temperature sensor. The component is housed in a 32-pin VQFN package.

Feature Summary

• Integrates a high-resolution 24-bit delta-sigma architecture with a flexible input multiplexer supporting multiple channel configurations.
• Includes built-in precision excitation current sources suitable for driving resistive sensors such as RTDs and strain gauges.
• Features an on-chip temperature sensor and programmable gain amplifier for direct signal conditioning without external components.

Applications

• Industrial process control systems requiring high-precision multi-channel data acquisition.
• Weighing scales and force measurement instrumentation utilizing load cells.
• Thermal management monitoring using resistance temperature detectors (RTDs).

Procurement Notes

Verify the specific suffix IRHBT against the manufacturer's latest datasheet to confirm pinout and electrical characteristics. Ensure compatibility with the target system's SPI interface timing and voltage levels. Confirm moisture sensitivity level handling during assembly to prevent package damage. Cross-reference the ordering part number with official distributor catalogs to avoid substitution errors.

Selection Notes

Select this component when a single ADC channel must handle multiple sensor inputs via internal switching. Compare performance requirements against the ADS1260 if fewer channels are sufficient. Evaluate power consumption constraints relative to the 40 kSPS maximum data rate. Consider the availability of integrated iDACs to reduce external circuit complexity for sensor excitation.

Part Context

This part belongs to the ADS126x family of precision data acquisition devices. It shares architectural similarities with the ADS1260 but offers increased channel count flexibility. The device is designed for applications demanding high accuracy and low noise in industrial environments. It complements other Texas Instruments signal chain components for complete sensor interfaces.

Replacement Considerations

ADS1261IRHBR is a parameter-equivalent alternative with identical electrical specifications but differs in packaging format. Verify that the reel versus cut-tape packaging does not impact the automated assembly process. No functional changes are indicated between these suffixes based on public documentation.