TIPD129
0-1A, Single-Supply, Low-Side, Current Sensing Solution
TIPD129
Overview
This TI Verified Design implements a single-supply, low-side current sensing solution that can accurately detect load current from 0-1A. The corresponding linear output range is from 0V to 4.9V. This design relies on the LM7705 inverting charge pump to bias the negative supply of the OPA320 to -0.23V. This setup extends the linear output range of the amplifier below 0V. The circuit's linear operation across the entire 0-1A input range enables calibrated performance to within ±0.003% error.
Features
- 0 - 1 A Current Sense
- 0 to 4.9 V Output
- Single-Supply Solution
- ±0.003% FSR Error (calibrated)
- ±0.0002% Zero Scale Error (calibrated)
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
Detailed schematic diagram for design layout and components
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Design file that contains information on physical board layer of design PCB
Products
Includes TI products in the design and potential alternatives.
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Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | User guide | 0-A to 1-A Single-Supply Low-Side Current-Sensing Solution Design Guide (Rev. B) | Dec. 11, 2015 |
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