The HCPL-7860/HCPL-786J Optically Isolated Modulator and HCPL-0872 Digital Interface IC or digital filter together form an isolated programmable two-chip analog-to-digital converter. The isolated modulator allows direct measurement of motor phase currents in power inverters.In operation, the HCPL-7860/HCPL-786J Isolated Modulator converts a low-bandwidth analog input into a highspeed one-bit data stream by means of a Sigma-Delta() over-sampling modulator. This modulation provides for high noise margins and excellent immunity against isolation-mode transients. The modulator data and onchip sampling clock are
encoded and transmitted across the isolation boundary where they are recovered and decoded into separate high-speed clock and data channels.

? Motor Phase and Rail Current Sensing
? Data Acquisition Systems
? Industrial Process Control
? Inverter Current Sensing
? General Purpose Current Sensing and Monitoring

? 2.5 A maximum peak output current
? 12-bit Linearity
? 200 ns Conversion Time(Pre-Trigger Mode 2 with HCPL-0872)
? 12-bit Effective Resolution with 5 s Signal Delay(14-bit with 102 s) (with HCPL-0872)
? Fast 3 s Over-Range Detection (with HCPL-0872)
? ± 200 mV Input Range with Single 5 V Supply
? 1% Internal Reference Voltage Matching
? Offset Calibration (with HCPL-0872)
? -40°C to +85°C Operating Temperature Range
? 15 kV/s Isolation Transient Immunity
? Safety Approval: UL 1577, CSA and IEC/EN/DIN EN 60747-5-2