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Powertrain current sensor

Products and reference designs
Block diagram

Powertrain current sensor

Block diagram

Overview

Our various configurations of powertrain current sensors enable high accuracy, fast response and high dynamic range current measurement.

Design requirements

Powertrain current sensor designs require:

  • Addressing the need for high-accuracy current sensors with low drift and high linearity current-sensing topologies.
  • Temperature and linearity-compensated sensors providing precise current sensing over higher dynamic ranges.
  • Enabling fast shutdown in an overcurrent scenario by high bandwidth and fast response current sensing.

Block diagram

Find products and reference designs for your system.

Powertrain current sensor

Analog front end Analog front end Current shunt monitor Current shunt monitor ADC ADC Shunt resistor Shunt resistor I (Current) I (Current) Protection Protection 12 V 12 V Wired interface Wired interface Analog/ digital Analog/ digital Sensor supply Sensor supply Linear regulator Linear regulator Digital processing Digital processing MCU MCU

Analog front end

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A high magnitude of current flows through the micro-ohm shunt, which results in a small amount of voltage drop across the shunt. Using current shunt monitors, this voltage is amplified and converted into digital for further signal processing.

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Data converters (6)
Precision ADCs
  • ADS131M03-Q1—Automotive, three-channel, 24-bit, 64-kSPS, simultaneous-sampling, delta-sigma ADC
    Data sheet: PDF | HTML
  • ADS131B23-Q1—Automotive high-voltage battery-pack monitor with three ADC channels for current and voltage sensing
    Data sheet: PDF | HTML
  • ADS1120-Q1—Automotive 16-bit 2-kSPS 4-ch low-power delta-sigma ADC with PGA and VREF for small signal sensors
    Data sheet: PDF | HTML
  • ADS1015-Q1—Automotive 12-bit, 3.3-kSPS, 4-ch, delta-sigma ADC with PGA, oscillator, VREF, comparator and I2C
    Data sheet: PDF | HTML
  • ADS1259-Q1—Automotive, 24-bit, 14.4kSPS, 1-ch delta-sigma ADC w/ low-drift Vref for high-dynamic range systems
    Data sheet: PDF | HTML
  • ADS131M02—Two-channel, 24-bit, 64-kSPS, simultaneous-sampling, delta-sigma ADC
    Data sheet: PDF | HTML
Amplifiers (17)
Analog current-sense amplifiers
  • INA214-Q1—AEC-Q100, 26V, bi-directional, high-precision current sense amplifier
    Data sheet: PDF | HTML
  • INA199-Q1—AEC-Q100, 26V, bi-directional current sense amplifier
    Data sheet: PDF | HTML
  • INA300-Q1—AEC-Q100, 36V current sense comparator
    Data sheet: PDF | HTML
  • INA240-Q1—AEC-Q100, -4 to 80V, bi-directional, ultra-precise current sense amplifier w/ enhanced pwm rejection
    Data sheet: PDF | HTML
  • INA186—40-V, bidirectional, high-precision current sense amplifier with picoamp input bias & ENABLE
    Data sheet: PDF | HTML
  • INA199—26V, bi-directional current sense amplifier
    Data sheet: PDF | HTML
General-purpose op amps
  • LM2904BA-Q1—Automotive, dual, 36-V, 1.2-MHz, 2-mV offset voltage operational amplifier
    Data sheet: PDF | HTML
  • TLV9001-Q1—Automotive, single-channel, 5.5-V 1-MHz rail-to-rail input and output operational amplifier
    Data sheet: PDF | HTML
  • TLV9002-Q1—Automotive-grade, dual, 5.5-V, 1-MHz, RRIO operational amplifier for cost-optimized applications
    Data sheet: PDF | HTML
  • TSV914A-Q1—Automotive-grade, quad, 5.5-V, 8-MHz, RRIO operational amplifier
    Data sheet: PDF | HTML
  • TLV9152—Dual, 16-V, 4.5-MHz, low-power operational amplifier
    Data sheet: PDF | HTML
  • TLV9001—One-channel, 1-MHz rail-to-rail input and output 1.8-V to 5.5-V operational amplifier
    Data sheet: PDF | HTML
Comparators
  • TL331-Q1—Automotive single differential comparator
    Data sheet: PDF | HTML
  • TLV1811-Q1—Automotive, single-channel micropower high-voltage comparator with push-pull output
    Data sheet: PDF | HTML
Precision op amps (Vos<1mV)
  • OPA376-Q1—Automotive Precision, Low Noise, Low Iq Operational Amplifier
    Data sheet: PDF | HTML
  • OPA320-Q1—Automotive qualified, precision, zero-crossover, 20-MHz, 0.9-pA Ib, RRIO, CMOS operational amplifier
    Data sheet: PDF | HTML
  • OPA320—Precision, zero-crossover, 20-MHz, 0.9-pA Ib, RRIO, CMOS operational amplifier
    Data sheet: PDF | HTML
Sensors (3)
Digital temperature sensors
  • LMT01-Q1—Automotive Grade, 0.5°C Accurate 2-pin Temperature Sensor with a Pulse Train Interface
    Data sheet: PDF | HTML
Signal conditioners
  • DRV411—Hall-Effect Magnetic Sensor Signal Conditioning IC for Closed-Loop Applications
    Data sheet: PDF | HTML
  • DRV425—Fully-integrated fluxgate magnetic sensor for open-loop applications
    Data sheet: PDF | HTML
Isolation (10)
Digital isolators
  • ISO6762-Q1—Automotive, general-purpose, 50-Mbps, six-channel (4/2) digital isolator with robust EMC
    Data sheet: PDF | HTML
  • ISO6763-Q1—Automotive, general-purpose, 50-Mbps, six-channel (3/3) digital isolator with robust EMC
    Data sheet: PDF | HTML
  • ISO6741-Q1—Automotive, general-purpose, quad-channel, 3/1 digital isolator
    Data sheet: PDF | HTML
  • ISO7742-Q1—Automotive, robust EMC, quad-channel, 2/2, reinforced digital isolator
    Data sheet: PDF | HTML
Transformer drivers
  • SN6505B-Q1—Automotive, low-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies
    Data sheet: PDF | HTML
  • SN6505D-Q1—Automotive, low-noise, 1-A, 420-kHz transformer driver for isolated power supplies
    Data sheet: PDF | HTML
  • SN6501-Q1—Automotive low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies
    Data sheet: PDF | HTML
Isolated amplifiers
  • AMC3330-Q1—Automotive, ±1-V input, precision voltage sensing reinforced isolated amplifier with int. DC/DC
    Data sheet: PDF | HTML
  • AMC1302-Q1—Automotive, ±50-mV input, precision current sensing reinforced isolated amplifier
    Data sheet: PDF | HTML
  • AMC1211-Q1—2-V input, precision voltage sensing basic isolated amplifier
    Data sheet: PDF | HTML
Power management (3)
Isolated power modules (integrated transformer)
  • UCC33420-Q1—Automotive, 5V/5V 1.5W 3kVrms isolated DC-DC module with integrated transformer
    Data sheet: PDF | HTML
Series voltage references
  • LM4132-Q1—Automotive, SOT-23 precision low dropout voltage reference
    Data sheet: PDF | HTML
  • REF35—650-nA quiescent current, 12-ppm/°C drift, ultra-low-power precision voltage reference
    Data sheet: PDF | HTML
  • TIDA-00753—Three Phase AC Current Measurements Using Current Transformer Reference Design
    Design guide: PDF Schematic: PDF
  • TIDA-00795—Automotive Precision eFuse Reference Design
    Design guide: PDF Schematic: PDF
  • TIDA-01506—Reference Design for Automotive, Proportional-Solenoid Current Sensor
    Design guide: PDF Schematic: PDF
  • TIDA-020018—Automotive shunt-based isolated current sensor reference design for DC/DC and OBC applications
    Design guide: PDF Schematic: PDF
  • TIDA-020023—Automotive proportional solenoid drive with highly accurate current sensor reference design
    Design guide: PDF Schematic: PDF
  • TIDA-03050—Automotive, mA-to-kA Range, Current Shunt Sensor Reference Design
    Design guide: PDF Schematic: PDF
  • TIPD205—±100-A Bus Bar Current Sensor using Open-Loop Fluxgate Sensors Reference Design
    Design guide: PDF Schematic: PDF Schematic: PDF

Technical documentation

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Type Title Date
Technical article Eight questions about monitoring and protection in hybrid and electric vehicles PDF | HTML 28 Aug 2023
White paper Basic considerations for sensors in the powertrain (Rev. A) 23 Dec 2019
Technical article Addressing high-voltage current-sensing design challenges in HEV/EVs PDF | HTML 07 Jul 2023
White paper 動力系統感測器的基本考量 03 Oct 2019

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