ACNT-H79B, ACNT-H79A, ACNT-H790
Optical Isolation Amplifier in 15 mm Stretched SO-8
Package
Data Sheet
Description
Features
The ACNT-H79B/H79A/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.
±0.5% gain accuracy (ACNT-H79B)
–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:
For general applications, the ACNT-H79A (±1% gain tolerance)
and the ACNT-H790 (±±% gain tolerance) are recommended.
For high-precision applications, the ACNT-H79B (±0.5% gain
tolerance) can be used. The ACNT-H79B/H79A/H790 offers
wide creepage and clearance with a high common-mode
transient immunity of 15kV/μs. These features allows the
ACNT-H79B/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-H79B/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-H79B/H79A/H790 captures transients
in short circuit and overload conditions.
—
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
Combined with superior optical coupling technology, the
ACNT-H79B/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.
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.
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