TIDA-03040 Reference Design

Texas Instruments

Automotive Shunt-Based ±500A Precision Current Sensing Reference Design

Description

This shunt-based current sensor reference design provides an accuracy of < 0.2% FSR over a temperature range of -40°C to +125°C. Precision current sensing is essential in a number of automotive applications, including battery management systems, motor currents, and others. Generally, nonlinearity, temperature drift, shunt tolerances in these locations can cause poor accuracy results. This design solves these problems by using TI’s current shunt monitors and signal conditioners (INA240, PGA400-Q1).

Features
  • Accuracy of 0.2% FSR, over temperature (-40°C to 125°C)
  • Suitable for ±500A, high/low-side current sensing
  • Compensated for temperature and non-linearity (second order temperature and linearity compensation algorithm)
  • Protection against harness faults (overvoltage, reverse polarity, input/output signal protection)
  • Electromagnetic interference (EMI) protection
Applications
  • Battery Management System (BMS)
  • Engine Management
Product Categories
  • Amplifiers

Parts

Part Number Name Companion Part
INA240A1D INA240A1D Datasheet
INA240A1DR INA240A1DR Datasheet
INA240A1IPW INA240A1IPW Datasheet
INA240A1IPWR INA240A1IPWR Buy Datasheet
INA240A1PWT INA240A1PWT Buy
INA240A2D INA240A2D Datasheet
INA240A2DR INA240A2DR Datasheet
INA240A2IPW INA240A2IPW Buy Datasheet
INA240A2IPWR INA240A2IPWR Datasheet
INA240A2PW INA240A2PW Buy Datasheet
INA240A2PWR INA240A2PWR Buy Datasheet
INA240A2PWT INA240A2PWT
INA240A1EDRQ1 INA240A1EDRQ1 Datasheet
INA240A1QDQ1 INA240A1QDQ1 Datasheet
INA240A1QDRQ1 INA240A1QDRQ1 Datasheet
INA240A2EDRQ1 INA240A2EDRQ1 Datasheet

Bill Of Materials

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Schematic

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Design File

Automotive Shunt-Based ±500-A Precision Current Sensing Reference Design

Download the design file for TIDA-03040