0-1A, Single-Supply, Low-Side, Current Sensing Solution
TIPD129
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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.