ACPL-7900-500E Datasheet, PDF (1/15 Pages) AVAGO TECHNOLOGIES LIMITED – Precision Isolation Amplifiers

ACPL-790B, ACPL-790A, ACPL-7900
Precision Isolation Amplifiers
Data Sheet
Description
The ACPL-790B/790A/7900 isolation amplifiers were designed
for current and voltage sensing in electronic power converters
in 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 ACPL-790A (±1% gain tolerance)
and the ACPL-7900 (±3% gain tolerance) are recommended.
For high precision applications, the ACPL-790B (±0.5% gain
tolerance) can be used. The product operates from a single 5 V
supply and provides excellent linearity and dynamic
performance of 62 dB SNR. With 200 kHz bandwidth, 1.6 μs fast
response time, the product captures transients in short circuit
and overload conditions. The high common-mode transient
immunity (15 kV/μs) of the ACPL-790B/790A/7900 provides 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.
Combined with superior optical coupling technology, the
ACPL-790B/790A/7900 implements sigma-delta (-)
analog-to-digital converter, 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 DIP-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 which may be induced by ESD.
Features
 ±0.5% High Gain Accuracy (ACPL-790B)
 –50 ppm/°C Low Gain Drift
 0.4 mV Input Offset Voltage
 0.05% Excellent Linearity
 62 dB SNR
 200 kHz Wide Bandwidth
 3 V to 5.5 V Wide Supply Range for Output Side
 -40° C to +105° C Operating Temperature Range
 Advanced Sigma-Delta (-) A/D Converter Technology
 Fully Differential Isolation Amplifier
 15 kV/μs Common-Mode Transient Immunity
 Compact, Auto-Insertable DIP-8 Package
 Safety and Regulatory Approvals:
— IEC/EN/DIN EN 60747-5-5: 891 Vpeak working
insulation voltage
— UL 1577: 5000 Vrms/1 min double protection rating
— CSA: Component Acceptance Notice #5
Applications
 Current/Voltage Sensing in AC and Servo Motor Drives
 Solar Inverters, Wind Turbine Inverters
 Industrial Process Control
 Data Acquisition Systems
 Switching Power Supply Signal Isolation
 General Purpose Analog Signal Isolation
 Traditional Current Transducer Replacements
Avago Technologies
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