●The ACPL-785J isolation amplifier is designed for current sensing in electronic motor drives. In a typical implementation, motor currents flow through an external resistor and the resulting analog voltage drop is sensed by the ACPL-785J. A larger analog output voltage is created on the other side of the ACPL-785J’s optical isolation barrier. The output voltage is proportional to the motor current and can be connected directly to a single-supply A/D converter. A digital over-range output (/FAULT) and an analog rectified output (ABSVAL) are also provided.
●The wire OR-able over-range output (/FAULT) is useful for quick detection of short circuit conditions on any of the motor phases. The wire-OR-able rectified output (ABSVAL), simplifies measure-ment of motor load since it performs polyphase rectification. Since the common-mode voltage swings several hundred volts in tens of nanoseconds in modern electronic motor drives, the ACPL-785J was designed to ignore very high common-mode transient slew rates (10 kV/μs).
●±3% gain tolerance part (
●HCPL-788J
●) is also available
●### Features
● Output Voltage Directly Compatible with A/D Converters (0 V to VREF)
● Fast (3 μs) Short Circuit Detection with Transient Fault Rejection
● Absolute Value Signal Output for Overload Detection
● 1 μV/°C Offset Change vs. Temperature
● SO-16 Package
● –40°C to +85°C Operating Temperature Range
● 25 kV/μs Isolation Transient Immunity
● Regulatory Approvals: UL, CSA, IEC/EN/DIN EN 60747-5-5 (1230 Vpeak Working Voltage)
● Options:
●ACPL-785J-000E
●ACPL-785J-060E
●ACPL-785J-500E
●ACPL-785J-560E
Part 3D Model
