TIPD126: Bridge Sensor Conditioner


This bridge sensor conditioner module delivers a well regulated current output to a ground-referenced load. The first stage uses a mixed-signal programmable gain amplifier (PGA) to provide linearization and temperature compensation to a differential bridge sensor voltage. The second stage converts the PGA output voltage into current and transmits the current over a standard 4 mA to 20 mA current loop.

Additional circuitry protects the module against electrostatic discharge (ESD), electrical fast transients
(EFT), radiated and conducted electromagnetic interference (EMI), and surge.

TI Precision Designs are analog solutions created by TI’s analog experts. CerTIfied Designs offer the theory, component selection, simulation, complete PCB schematic & layout, bill of materials, measured performance, and certification testing results of useful circuits. Circuit modifications that help to meet alternate design goals are also discussed.

  • EMC Tested According to IEC 61000-4 and FCC Standards

  • Digitally Calibrated 4-20mA Output

  • 0.1% Accuracy


Manufacturer Texas Instruments
Category Wired Communication
Sub-Category Interface Solutions
Eval Board Normally In Stock
Purpose Differential Bridge Sensor to 4-20mA
Component Count + Extras 31 + 3
Features Auto-Zeroed
Fault Indication
Serial I/O
Voltage Reference
Data Rate (Max) - Not Given
Design Author Texas Instruments
Main I.C. Base Part PGA309
Date Created By Author
Date Added To Library 2014-10