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.

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