Isolated 15-bit A/D Converter

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The HCPL-7860/HCPL-786J Optically Isolated Modulator and HCPL-0872 Digital Interface IC or digital filter together form a optocoupler isolated programmable two-chip analog-to-digital converter. The isolated modulator allows direct measurement of motor phase currents in power inverter and automotive applications.

In operation, the HCPL-7860/HCPL-786J Isolated Modulator (optocoupler with 5000 VRMS dielectric withstand voltage rating) converts a lowbandwidth analog input into a high-speed one-bit data stream by means of a Sigma-Delta (Σ−∆) over-sampling modulator.

This modulation provides for high noise margins and excellent immunity against isolation-mode transients. The modulator data and on-chip sampling clock are encoded and transmitted across the isolation boundary where they are recovered and decoded into separate high-speed clock and data channels.




  • 12-bit Linearity
  • 800 ns Conversion Time (Pre-Trigger Mode 2)
  • 5 Conversion Modes for Resolution/Speed Trade-Off; 12-bit Effective Resolution with 20 us Signal Delay (14-bit with 103 us)
  • Fast 3 us Over-Range Detection
  • Serial I/O (SPI,QSPI and Microwire Compatible)
  • /-200 mV Input Range with Single 5 V Supply
  • 1% Internal Reference Voltage Matching
  • Offset Calibration
  • -40oC to 85oC Operating Temperature Range
  • 15 kV/us Isolation Transient Immunity
  • Regulatory Approvals; UL, CSA, IEC/EN/DIN EN 60747-5-2
  • Options available are:
500 = Tape and Reel Packaging Option
XXXE = Lead Free Option


  • Motor Phase and Rail Current Sensing
  • DC Bus Voltage sensing
  • Inverter Current Sensing
  • Switched Mode Power Supply Signal Isolation
  • General Purpose Current Sensing and Monitoring
  • General Purpose Analog Signal Isolation
  • Traditional Hall Effect Current Sensor Replacement

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available