HCPL-7800A-500E

HCPL-7800A-500E is an isolation amplifier. It is designed for current sensing in electronic motor drives. In a typical implementation, motor currents flow through an external resistor and the resulting analogue voltage drop is sensed by the HCPL-7800(A). A differential output voltage is created on the other side of the HCPL-7800(A) 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. It uses sigma-delta (Σ-Δ) analogue-to-digital converter technology, chopper-stabilized amplifiers, and a fully differential circuit topology. Typical applications include motor phase and rail current sensing, inverter current sensing, switched mode power supply signal isolation, general-purpose current sensing and monitoring, general-purpose analogue signal isolation.

• 15kV/µs common-mode rejection at VCM=1000V
• Worldwide safety approval: UL 1577 (3750Vrms/1min.) and CSA, IEC/EN/DIN EN 60747-5-5
• Fully differential circuit topology
• Magnitude of VOUT gain change vs. temperature is 0.00025V/V/°C typical
• Input offset voltage is 0.3mv typ at TA=25°C, VIN+=0V, VIN–=0V, VDD1=VDD2=5V
• VOUT bandwidth (–3dB) sine wave is 100kHz typ at VIN+=200mVpk-pk
• 0.004% nonlinearity
• VOUT noise is 31.5mVrms typ at VIN+=0.0V, VDD1=VDD2=5V and TA=25°C
• Compact, auto-insertable standard 8-pin DIP package
• Ambient operating temperature range from -40 to 85°C