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


Design files


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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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components

TIDCEG3.ZIP (1670 K)

Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Digital power monitors with integrated shunt resistor

INA26036V, 16-bit, precision i2c output current/voltage/power monitor w/ int. shunt resistor

Data sheet: PDF | HTML
I2C & I3C level shifters, buffers & hubs

P82B962-bit bidirectional 2- to 15-V 400-kHz I2C/SMBus buffer/cable extender

Data sheet: PDF | HTML
Signal isolators with integrated power

ISOW7842Quad-channel, 2/2, reinforced digital isolator with integrated power

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Isolated Current Sense Reference Design With Integrated Shunt Resistor and I2C Nov. 13, 2017

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