描述 Description

The HCPL-7820/7825 high CMR isolation amplifier consists of a sigma-delta analog-to-digital converter optically coupled to an integrated output digital-to-analog converter. When used with a shunt resistor in the current path, the HCPL-7820/7825 provides a cost-effective, auto-insertion compatible current sense solution.

特性 Features

? Fast Propagation Delays for Over-Current and Fault Detection Sensing

? High Common Mode Rejection (CMR): 30 kV/μs at VCM = 1000 V*

? 3 Gain Tolerance: HCPL-7820 5 Gain Tolerance: HCPL-7825

? 0.05 Nonlinearity

? Low Offset Voltage and Offset Drift vs. Temperature

? 200 kHz Bandwidth

? Performance Specified for Common Motor Control Applications over -40°C to 100°C Temperature Range

? Worldwide Safety and Regulatory Approval: UL 1577 (3750 V rms/1 Min), VDE 0884 and CSA

? Compact Auto-Insertable Standard 8-Pin DIP Package

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

? 1 μm CMOS IC Technology

Applications

? Motor Phase and Rail Current Sensing

? General Purpose Current Sensing and Monitoring

? High-Voltage Monitoring

? Switched Mode Power Supply Signal Isolation

? General Purpose Analog Signal Isolation

? Transducer Isolation