HCPL-7840 Datasheet PDF – Analog Isolation Amplifier

Part Number: HCPL-7840

Function: Analog Isolation Amplifier

Pakcage : DIP 8 Pin

Manufacturer: Avago Technologies


HCPL-7840 datasheet



The HCPL-7840 isolation amplifier family was designed for current sensing in electronic motor drives. In a typical implementation, motor currents fl ow through an external resistor and the resulting analog voltage drop is sensed by the HCPL-7840. A differential output voltage is created on the other side of the HCPL-7840 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 HCPL-7840 was designed to ignore very high common
mode transient slew rates (of at least 10 kV/μs).


1. 15 kV/μs common-mode rejection at VCM = 1000 V
2. Compact, auto-insertable standard 8-pin DIP package
3. 0.00025 V/V/°C gain drift vs. temperature
4. 0.3 mV input off set voltage
5. 100 kHz bandwidth


1. Motor phase and rail current sensing
2. Inverter current sensing
3. Switched mode power supply signal isolation

Other data sheets are available within the file: HCPL7840, HCPL-7840#300, HCPL-7840#500

HCPL-7840 Datasheet PDF Download

HCPL-7840 pdf