Design tool
CIRCUIT060007
Low-side, bidirectional current-sensing circuit
CIRCUIT060007
Overview
This single-supply low-side, bidirectional current sensing solution can accurately detect load currents from –1A to 1A. The linear range of the output is from 110mV to 3.19V. Low-side current sensing keeps the common-mode voltage near ground, and is thus most useful in applications with large bus voltages.
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
Get started
- Read the circuit design and circuit design with MSP430 smart analog combo
- Download the model
Downloads
Supported products & hardware
General-purpose op amps
MSP430 microcontrollers
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Circuit design | Low-side bidirectional current sensing circuit with MSP430™ smart analog combo (Rev. A) | PDF | HTML | 06 Mar 2020 |
| * | Circuit design | Low-side, bidirectional current-sensing circuit (Rev. B) | 01 Feb 2019 | |
| E-book | Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. B) | 05 Oct 2022 | ||
| E-book | Simplifying Current Sensing (Rev. A) | 09 Jan 2020 | ||
| Application note | How to Use the Smart Analog Combo in MSP430™ MCUs (Rev. A) | PDF | HTML | 24 Oct 2019 | |
| E-book | Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. A) | 18 Feb 2019 | ||
| User guide | 0-A to 1-A Single-Supply Low-Side Current-Sensing Solution Design Guide (Rev. B) | 11 Dec 2015 | ||
| Design guide | +/-1A Single-Supply Low-Side Current Sensing Solution Design Guide | 08 Dec 2014 |
Related design resources
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