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Hcpl-7860

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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.

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