0-1A, Single-Supply, Low-Side, Current Sensing Solution
TIPD129
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
-
TIPD129 Design File
(ZIP 759 KB)
08 Jan 2014
- 0-A to 1-A Single-Supply Low-Side Current-Sensing Solution Design Guide (Rev. B)
(PDF 941 KB)
11 Dec 2015
Description
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)
See the Important Notice and Disclaimer covering reference designs and other TI resources.
