HCPL-786J

Notes:
1. If V_IN- (pin 3) is brought above V_DD1 - 2 V with respect to GND1 an internal opticalcoupling test mode may be activated. This test mode is not intended for customer use.
2. Agilent recommends the use of nonchlorinated solder fluxes.

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 (optocoupler with 3750 V_RMS dielectric withstand voltage rating) converts a lowbandwidth analog input into a high-speed one-bit data stream by means of a Sigma-Delta (− ) over-sampling modulator. This modulation of HCPL-7860/HCPL-786J 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.