Broadcom ACPL-C799 Sigma-Delta Modulator

Broadcom ACPL-C799 Sigma-Delta Modulator converts an analog input signal into a high-speed data stream with galvanic isolation based on optical coupling technology. The Broadcom ACPL-C799 operates from a 5V power supply with a dynamic range of 77dB with an appropriate digital filter. The differential inputs of ±50mV (full-scale ±80mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications like motor phase current measurement.


  • 10MHz internal clock
  • 1-bit, second-order sigma-delta modulator
  • 16 bits resolution no missing codes
  • 77dB SNR (Typ.)
  • 1.3 μV/°C maximum offset drift
  • ±1% gain error
  • Internal reference voltage
  • ±50mV linear range with single 5V supply (±80mV full-scale)
  • Safety and regulatory approval: IEC/EN/DIN EN 60747-5-5: 1414 VPEAK working insulation voltage; UL 1577: 5000 VRMS/1 min isolation voltage; CSA: Component Acceptance Notice #5
  • 3V to 5.5V wide supply range for digital interface
  • -40°C to +105°C operating temperature range
  • SSO-8 package
  • 25kV/μs common-mode transient immunity


  • Motor phase and rail current sensing
  • Power inverter current sensing
  • Industrial process control
  • Data acquisition systems
  • General-purpose current sensing
  • Traditional current transducer replacements

Functional Block Diagram

Block Diagram - Broadcom ACPL-C799 Sigma-Delta Modulator
Published: 2016-12-12 | Updated: 2022-03-11