Description

The ACPL-782T isolation amplifier was designed for voltage and current sensing in electronic motor drives and battery system monitoring. In a typical implementation, and motor currents flow through an external resistor and the resulting analog voltage drop is sensed by the ACPL-782T. A differential output voltage is created on the other side of the ACPL-782T optical isolation barrier. This differential output voltage is proportional to the motor current and can be converted to a single-ended signal by using an op-amp as shown in the recommended application circuit. Since common-mode voltage swings of several hundred volts in tens of nanoseconds are common in modern switching inverter motor drives, the ACPL-782T was designed to ignore very high common-mode transient slew rates (of at least 10 kV/s).

Features

• ±2 Gain Tolerance @ 25°C

• 15 kV/s Common-Mode Rejection at VCM = 1000V

• 30ppm/°C Gain Drift vs. Temperature

• 0.3 mV Input Offset Voltage

• 100 kHz Bandwidth

• 0.004 Nonlinearity

• Compact, Auto-Insertable Standard 8-pin DIP Package

• Worldwide Safety Approval:

– UL 1577 (3750 VRMS/1 min.) and

– CSA

– IEC 60747-5-5, DIN EN 60747-5-2(VDE 0884 Teil 2)

• Qualified to AEC-Q100 Test Guidelines

• Automotive Operating Temperature -40 to 125°C

• Advanced Sigma-Delta (Σ-Δ) A/D Converter Technology

• Fully Differential Circuit Topology

Applications

• Automotive Motor Inverter Current/Voltage Sensing

• Automotive AC/DC and DC/DC converter Current/ Voltage sensing

• Automotive Battery ECU

• Automotive Motor Phase Current Sensing

• Isolation Interface for Temperature Sensing

• General Purpose Current Sensing and Monitoring