Isolated Current Sense with Integrated Shunt Resistor and I2C Interface Reference Design
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Key Document


This verified design can accurately measure current on a bus that carries hundreds of volts. This design is targeted for solar and server applications due to their wide high-voltage input range requirements. This design uses the INA260 current shunt monitor with integrated shunt resistor for current measurements, two P82B96 bidirectional buffers to facilitate I2C communication, and the ISOW7842 to allow isolated current measurements. The INA260 is limited by a common-mode voltage of 36 V; using the ISOW7842 allows the designer to float the INA260 side of the design to facilitate higher bus voltages.

  • Current Measurement on High-Voltage Bus (±1 kV)
  • Power Isolated
  • I2C Compatibility
  • Reinforced Digital I2C Isolation to Microcontroller
  • 1% System Accuracy

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA260  36V, 16-bit, precision i2c output current/voltage/power monitor w/ int. shunt resistor  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
ISOW7842  High-efficiency, low-emissions, quad-channel, 2/2, reinforced digital isolator with integrated power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
P82B96  Dual Bidirectional Bus Buffer  I2C ICs  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA260 Download Download
ISOW7842 Download Download
P82B96 Download Download
Download Download
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Technical documentation

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Datasheet (1)
Title Type Size (KB) Date
PDF 1185 13 Dec 2016
User guide (1)
Title Type Size (KB) Date
PDF 277 13 Nov 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1670 15 Jan 2018
ZIP 658 15 Jan 2018
PDF 526 15 Jan 2018
PDF 108 15 Jan 2018
PDF 55 15 Jan 2018
PDF 153 15 Jan 2018

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