ACNT-H79A Datasheet, PDF (1/15 Pages) Broadcom Corporation. – Optical Isolation Amplifier in 15 mm Stretched SO-8 Package

ACNT-H79A, ACNT-H790
Optical Isolation Amplifier in 15 mm Stretched SO-8
Package
Data Sheet
Description
The ACNT-H79A and ACNT-H790 isolation amplifiers are
designed for current and voltage sensing in electronic power
converters for applications including motor drives and
renewable energy systems. In a typical motor drive
implementation, current flows through an external resistor and
the resulting analog voltage drop is sensed by the isolation
amplifier. A differential output voltage that is proportional to
the current is created on the other side of the optical isolation
barrier.
For general applications, the ACNT-H79A (±1% gain tolerance)
and the ACNT-H790 (±3% gain tolerance) are recommended.
The ACNT-H79A/H790 offers wide creepage and clearance with
a high common-mode transient immunity of 15kV/μs. These
features allows the ACNT-H79A/H790 to provide the precision
and stability needed to accurately monitor motor current in
high noise motor control environments, providing for
smoother control (less “torque ripple”) in various types of
motor control applications. The ACNT-H79A/H790 operates
from a single 5 V supply and provides excellent linearity and
dynamic performance of 60dB SNR. With 200 kHz bandwidth,
1.6 μs fast response time, the ACNT-H79A/H790 captures
transients in short circuit and overload conditions.
Combined with superior optical coupling technology, the
ACNT-H79A/H790 uses sigma-delta (-) analog-to-digital
modulation, chopper stabilized amplifiers, and a fully
differential circuit topology to provide unequaled
isolation-mode noise rejection, low offset, high gain accuracy
and stability. This performance is delivered in a compact,
auto-insertable 15 mm Stretched SO-8 package that meets
worldwide regulatory safety standards.
Features
 ±1% Gain Accuracy (ACNT-H79A)
 –50 ppm/°C Low Gain Drift
 0.6 mV Input Offset Voltage
 0.05% Excellent Linearity
 60 dB SNR
 200 kHz Wide Bandwidth (Typ)
 –40°C to +105°C Operating Temperature Range
 Advanced Sigma-Delta (-) A/D Modulation Technology
 15 mm Stretched SO-8 Package
 0.5mm Distance Through Insulation (DTI)
 15 kV/μs Common-Mode Transient Immunity
 Safety and Regulatory Approvals:
— IEC/EN/DIN EN 60747-5-5: 2262Vpeak working
insulation voltage
— UL 1577: 7500Vrms/1min double protection rating
— CSA: Component Acceptance Notice #5
Applications
 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
CAUTION
It is advised that normal static precautions be
taken in handling and assembly of this
component to prevent damage and/or
degradation that may be induced by ESD. The
components featured in this data sheet are not
to be used in military or aerospace applications
or environments.
Broadcom
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