Triphasic AC current measurements using transformer ref. design

Texas Instruments’ TIDA-00753 reference design demonstrates high accuracy wide range AC current measurement for a three phase motor using the INA199 zero drift current shunt monitor. The design also has low power consumption of 25mW for Gain stage of 200 as compared to a discrete solution.

The design footprint and BOM cost is much smaller than a discrete solution due to the integrated high precision resistors inside the INA199.

Features

  • 0.5% Accuracy (Uncalibrated) for 10 to 100% of Full Scale Primary Current
  • Power Consumption of 25mW for Gain Stage
  • Small Footprint no need of External Resistors for Amplfication

Discover more here.

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