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CIRCUIT060031

3-decade, load-current sensing circuit

CIRCUIT060031

Overview

This single-supply, low-side, current-sensing solution accurately detects load current between 10 μA and 10 mA. A unique yet simple gain switching network was implemented to accurately measure the three decade load current range.
Features
  • Input: 10 μA to 10 mA
  • Output: 100 mV to 4.9 V
  • Supply:
    • Vcc = 5 V
    • Vee = 0V
    • Vref = 0V
Instrumentation amplifiers
INA326 — Precision, Low Drift, CMOS Instrumentation Amplifier
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Type Title Date
* Circuit design 3-decade, load-current sensing circuit (Rev. A) PDF | HTML 01 Feb 2019

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Reference designs

REFERENCE DESIGN
TIPD104 — Current sensing reference design for 10 µA to 10 mA, low side, single supply

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