ADS125H02IRHBT

Overview

The ADS125H02IRHBT is a high-precision, 24-bit analog-to-digital converter (ADC) from Texas Instruments, utilizing sigma-delta architecture. It features two differential input channels and supports serial communication interfaces. The device operates with an analog supply voltage ranging from 4.75 V to 5.25 V and a digital supply voltage between 2.7 V and 5.25 V. It achieves a maximum sampling rate of 40 kSPS and includes integrated programmable gain amplifiers (PGA), excitation current sources (iDACs), and a temperature sensor. The component is housed in a VQFN-32 package and is rated for operation within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated excitation current sources (iDACs) facilitate direct sensor excitation without external components.
• Built-in programmable gain amplifier (PGA) allows flexible signal conditioning for varying input amplitudes.
• On-chip oscillator and GPIO pins reduce system complexity and board space requirements.
• High common-mode rejection capabilities effectively suppress noise at 50 Hz and 60 Hz frequencies.

Applications

• Industrial process control systems requiring high-resolution data acquisition
• Precision weighing scales and load cell measurement applications
• Thermocouple and RTD temperature monitoring instrumentation
• Medical diagnostic equipment demanding low-noise signal conversion

Procurement Notes

Verify the specific suffix 'IRHBT' against official Texas Instruments documentation to confirm the tape-and-reel packaging configuration and moisture sensitivity level. Ensure compatibility with standard SPI protocols and validate power supply decoupling requirements during integration. Cross-reference the part number with authorized distributors to confirm authenticity and traceability.

Selection Notes

Select this component when dual-channel, high-resolution conversion is required alongside integrated sensor drive capabilities. Compare performance metrics such as noise density and linearity against single-channel alternatives if channel count is not critical. Consider the thermal operating range and package size constraints relative to the target application environment.

Part Context

This device belongs to the ADS125H02 series, designed for precision measurement tasks. It shares architectural similarities with other high-resolution ADCs but distinguishes itself through integrated iDACs and GPIO functionality. The series targets applications needing robust noise rejection and simplified peripheral design.

Replacement Considerations

Consult official substitution guides for compatible parts within the ADS125x family. Verify pinout compatibility and electrical parameter alignment before replacing existing inventory. No direct public substitute part numbers are confirmed in the provided source material.