Low-side, bidirectional current-sensing circuit CIRCUIT060007 (ACTIVE)

Description & Features

Technical Documents

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Key Document

Description

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

Technical Documents
Application notes (1)
Title Type Size (KB) Date
PDF 147 01 Feb 2019
User guides (2)
Title Type Size (KB) Date
PDF 941 11 Dec 2015
PDF 723 08 Dec 2014
Solution guides (1)
Title Type Size (KB) Date
PDF 11259 18 Feb 2019
More literature (1)
Title Type Size (KB) Date
PDF 4073 29 Nov 2018

Software (1)

Development Tools (2)

Name Part Number Tool Type
Analog engineer's calculator  ANALOG-ENGINEER-CALC  Calculation Tools 
SPICE-based analog simulation program  TINA-TI  Circuit Design & Simulation 

TI Devices (4)

Part Number Name Product Family
LPV821  650nA, Precision Zero-Drift Nanopower Amplifier  Operational amplifiers (op amps) 
OPA313  1-MHz, Micropower, Low-Noise, Rail-to-Rail I/O 1.8-V Operational Amplifier  Operational amplifiers (op amps) 
OPA376  Precision, Low Noise, Low Iq Operational Amplifier  Operational amplifiers (op amps) 
TLV9062  10-MHz, low-noise, RRIO, CMOS operational amplifier for cost-sensitive systems  Operational amplifiers (op amps) 

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