DESCRIPTION
FEATURES
The Broadcom® ACPL-C72B, ACPL-C72A, and ACPL-C720 isolation amplifiers are designed for current 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 shunt 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. Designed to reduce power loss on the shunt resistor, the ACPL-C72x series are optimized to accept a ±50-mV input voltage range. For general applications, the ACPL-C72A (±1% gain tolerance) and the ACPL-C720 (±3% gain tolerance) are recommended. For high-precision applications, the ACPL-C72B (±0.5% gain tolerance) can be used. Combined with superior optical coupling technology, the ACPL-C72x series implements sigma-delta (Σ-Δ) analog-todigital converter, chopper-stabilized amp...