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ACPL-C799 - Sigma-Delta Modulator

General Description

The Avago Technologies’ ACPL-C799 is a 1-bit, second-order sigma-delta (-) modulator converts an analog input signal into a high-speed data stream with galvanic isolation based on optical coupling technology.

Key Features

  • 10-MHz internal clock.
  • 1-bit, second-order sigma-delta modulator.
  • 16 bits resolution no missing codes (12 bits ENOB).
  • 77 dB SNR typ.
  • 1.3 μV/°C maximum offset drift.
  • ±1% gain error.
  • Internal reference voltage.
  • ±50 mV linear range with single 5 V supply (±80 mV full scale).
  • 3V to 5.5V wide supply range for digital interface.
  • 40°C to +105°C operating temperature range.
  • SSO-8 package.
  • 25 kV/μs common-mode transient immunity.

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Full PDF Text Transcription (Reference)

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ACPL-C799 Optically Isolated ±50 mV Sigma-Delta Modulator Data Sheet Description The Avago Technologies’ ACPL-C799 is a 1-bit, second-order sigma-delta (-) modulator converts an analog input signal into a high-speed data stream with galvanic isolation based on optical coupling technology. The ACPL-C799 operates from a 5V power supply with dynamic range of 77 dB with an appropriate digital filter. The differential inputs of ±50 mV (full scale ±80 mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications, such as motor phase current measurement. The analog input is continuously sampled by a means of sigma-delta over-sampling using an on-board clock.