Part Number: HCPL-7840
Function: Analog Isolation Amplifier
Pakcage : DIP 8 Pin
Manufacturer: Avago Technologies
Pinouts:
Description
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).
Features
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
Applications:
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
