HCPL-7840 Isolation Amplifier
Data Sheet
Lead (Pb) Free RoHS 6 fully compliant RoHS 6 fully compliant options available; -xxxE denotes a lead-free product
Description
The HCPL-7840 isolation amplifier family was designed for current sensing in electronic motor drives.
In a typical implementation, motor currents flow 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.
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