Optical Isolation Amplifier in 15mm Stretched SO8 Package

Currently Viewing:

The Broadcom ACNT-H79A and ACNT-H790 are high-linearity optically isolated amplifier devices in 15mm wide creepage and 14.2mm clearance, designed for current and voltage sensing applications in systems such as motor drives and renewable energy inverters. In a typical motor drive implementation, the ACNT-H79A/H790 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.
The ACNT-H79A (±1% gain tolerance) and ACNT-H790 (±3% gain tolerance) offer common-mode transient immunity of 15 kV/µs, which provides the precision and stability needed to accurately monitor motor current in noisy motor control environment. Accurate current monitoring enables smoother motor control (less “torque ripple”) for various types of motor applications.
The ACNT-H79A/H790 operates on a single 5V supply and provides excellent linearity with an SNR of 60 dB. With 200kHz bandwidth and 1.6-µs fast response time, the device captures transients in short circuit and overload conditions.


  • 3% Gain Accuracy (ACNT-H790)
  • -50 ppm/°C Low Gain Drift
  • 0.6 mV Input Offset Voltage
  • 0.05% Excellent Linearity
  • 60dB SNR
  • 200kHz Wide Bandwidth (typ)
  • Operating Temperature Range: -40 °C to +105 °C
  • Advanced Sigma-Delta A/D Converter Technology
  • 0.5mm Distance Through Insulation (DTI)
  • 15 kV/µs Common-Mode Transient Immunity
  • 15mm Stretched SO-8 Package
  • Safety and Regulatory Approvals:
- IEC/EN/DIN EN 60747-5-5: 2,262 VPEAK Working Insulation Voltage
- UL 1577: 7,500 VRMS per Minute Double Protection Rating
- CSA: Component Acceptance Notice #5


  • Current Sensing & Voltage Sensing in AC and Servo Motor Drive
  • Mid-Voltage Drives
  • Solar Inverters, Wind Turbine Inverter
  • Industrial Process Control
  • General Purpose Analog Signal Isolation
  • Hall Effect Current Transducer Replacement

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Samples Available Yes
RoHS6 Compliant Y
Max Qty of Samples 20
Product Type Miniature Isolation Amplifier
Gain Error at 25 Deg C (%) Max ±3
VDD2 (V) 3 - 5.5
CMR (min.) (V/µs) 15000.0
Vcm (V) 1000.0
UL Insulation Rating Viso (VRMS) 7500.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 2262.0

Data Sheet1 i
Reliability Data Sheet1 i
Technical Notes1 i


Precision Miniature Isolation Amplifiers


Precision Miniature Isolation Amplifiers