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Isolated SMD Current Sensor with Analog Output

In this design, the signal from a WSL SMT shunt resistor is fed to a VIA0050DD, a high-performance, isolated, differential output amplifier. The VIA0050DD has a linear differential input range of ±50 mV and a linear differential output range of ±2.05 V, which is converted to a single-ended output ranging from 0 V to 2.5 V (OUT to GND). This output is ready to be interfaced with a single-ended ADC or multimeter. Using the combination of a shunt and a VIA0050DD isolation amplifier, this design provides an analog output for AC current measurement up to ± 54 A continuously at a bandwidth of ~ 280 kHz.

Reference

<p>Functional Block Diagram</p>

Diagram 1

Features

  • AC current measurement up to 1415 A
  • Maximum working isolation voltage of 1200 VRMS
  • Isolated single-ended analog output
  • Low temperature offset and gain drift
  • Bandwidth of approx. 280 kHz

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Isolated SMD Current Sensor with Analog Output | Vishay | Vishay