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Low-side, bidirectional current-sensing circuit
CIRCUIT060007
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Description & Features

Technical documentation

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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 documentation
Application notes (3)
Title Type Size (KB) Date
PDF 591 06 Mar 2020
PDF 440 24 Oct 2019
PDF 147 01 Feb 2019
User guides (2)
Title Type Size (KB) Date
PDF 941 11 Dec 2015
PDF 723 08 Dec 2014
White papers (2)
Title Type Size (KB) Date
PDF 3447 09 Jan 2020
PDF 11294 18 Feb 2019
Design files (1)
Title Type Size (KB) Date
ZIP 297 02 May 2018

Design tools & simulation (2)

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

TI Devices (8)

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MSP430FR2353  24MHz 105C integrated analog microcontroller with 16KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit ADC  Microcontrollers (MCU) 
MSP430FR2355  24MHz 105C integrated analog microcontroller with 32KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit ADC  Microcontrollers (MCU) 
OPA313  1-Channel, 1-MHz, low-noise, low power, RRIO 1.8-V op amp  Operational amplifiers (op amps) 
OPA376  Precision (0.025mV), low noise (7.5nV/rtHz), low quiescent current (760uA) op amp  Operational amplifiers (op amps) 
TLV9062  2-Channel, 10-MHz, low-noise, RRIO, CMOS op amp for cost-sensitive systems  Operational amplifiers (op amps) 

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