CIRCUIT060006
Bridge amplifier circuit
CIRCUIT060006
Overview
A strain gauge is a sensor whose resistance varies with applied force. To measure the variation in resistance, the strain gauge is placed in a bridge configuration. This design uses a 2 op amp instrumentation circuit to amplify a differential signal created by the change in resistance of a strain gauge. By varying R10, a small differential voltage is created at the output of the Wheatstone bridge which is fed to the 2 op amp instrumentation amplifier input.
Features
- Single 5V supply with half-supply reference
- Input: -2.22mV to 2.27mV differential
- Output: 225mV - 4.72V
- Strain gauge resistance variation: 115 - 125 Ohms
- Gain: 1001V/V
Technical documentation
No results found. Please clear your search and try again.
View all 8
| Type | Title | Date | ||
|---|---|---|---|---|
| Circuit design | Strain gauge bridge amplifier circuit with MSP430 smart analog combo (Rev. B) | PDF | HTML | Oct 8, 2024 | |
| Circuit design | Two op amp instrumentation amplifier circuit (Rev. A) | PDF | HTML | Sep 26, 2024 | |
| E-book | Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. D) | PDF | HTML | Sep 24, 2024 | |
| Circuit design | Single-Supply Strain Gauge Bridge Amplifier Circuit (Rev. A) | PDF | HTML | Apr 26, 2023 | |
| Circuit design | Three Op Amp Instrumentation Amplifier Circuit (Rev. A) | PDF | HTML | Mar 30, 2022 | |
| Circuit design | Discrete Wide Bandwidth INA Circuit (Rev. A) | PDF | HTML | Dec 23, 2020 | |
| Application note | How to Use the Smart Analog Combo in MSP430™ MCUs (Rev. A) | PDF | HTML | Oct 24, 2019 | |
| Design guide | Single-Supply Strain Gauge in a Bridge Configuration Design Guide | Nov 2, 2015 |