Broadcom ACNT-H79x Optical Isolation Amplifiers

Broadcom ACNT-H79x are high-linearity optically isolated amplifier devices in a 14.2mm wide creepage and clearance SO8 package. They are designed for current and voltage sensing applications in systems like motor drives and renewable energy inverters. In a typical motor drive implementation, the ACNT-H79x can be used to sense a voltage drop across a sense resistor. A differential output voltage that is proportional to the current across the resistor is created on the other side of the optical isolation barrier.


  • ±1% Gain Accuracy (ACNT-H79A)
  • -50 ppm/°C Low Gain Drift
  • 0.6mV Input Offset Voltage
  • 0.05% Excellent Linearity
  • 60dB SNR
  • 200kHz Wide Bandwidth (Typ)
  • 0.5mm Distance Through Insulation (DTI)
  • 15kV/μs Common-Mode Transient Immunity
  • Safety and Regulatory Approvals:
    • IEC/EN/DIN EN 60747-5-5: 2262Vpeak working insulation voltage
    • UL 157: 7500Vrms/1min double protection rating
    • CSA: Component Acceptance Notice #5
  • Stretched SO-8 Package with 14.2mm Creepage and Clearance
  • -40°C to +105°C Operating Temperature Range
  • Advanced Sigma-Delta (∑-Δ) A/D Modulation Technology


  • Current/Voltage Sensing in AC/Servo Motor Drives
  • Mid Voltage Drives
  • Solar Inverters, Wind Turbine Inverters
  • Industrial Process Control
  • General Purpose Analog Signal Isolation
  • Hall Effect Current Transducer Replacements

Functional Diagram

Block Diagram - Broadcom ACNT-H79x Optical Isolation Amplifiers

Broadcom 15 mm Wide ACNT Optocouplers for High Voltage Applications

Broadcom ACNT optocouplers family offers 15 mm creepage and 14.2 mm clearance for high voltage isolation applications. These optocouplers provide 2,262 VPEAK working insulation voltage and 12,000 VPEAK transient overvoltage in a compact stretched surface mount SO-8 package. The ACNT optocouplers consist of comprehensive product types to meet the different galvanic isolation requirements and features. They are the ACNT-H343 gate drive optocoupler, ACNT-H61L low power 10 MBd digital optocoupler, ACNT-H790/H79A/H79B high linearity isolation amplifier for current sensing, ACNT-H870/H87A/H87B voltage sense, and ACNT-H50L/H511 low-speed analog optocoupler.

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Published: 2015-02-17 | Updated: 2023-07-27