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HCPL-786J - Optically Isolated Sigma-Delta Modulator

General Description

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.

Key Features

  • 12-bit Linearity.
  • 200 ns Conversion Time (PreTrigger Mode 2 with HCPL-0872).
  • 12-bit Effective Resolution with 5 µs Signal Delay (14-bit with 102 µs) (with HCPL-0872).
  • Fast 3 µs Over-Range Detection (with HCPL-0872).
  • ± 200 mV Input Range with Single 5 V Supply.
  • 1% Internal Reference Voltage Matching.
  • Offset Calibration (with HCPL0872).
  • -40°C to +85°C Operating Temperature Range.
  • 15 kV/µs Isolation Transient Immunity.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Agilent HCPL-7860/HCPL-786J Optically Isolated Sigma-Delta (Σ−∆) Modulator Data Sheet In operation, the HCPL-7860/ HCPL-786J Isolated Modulator (optocoupler with 3750 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.