AMPLIFICADOR OPTOAISLADO, ENCAPSULADO DIP-8. The HCPL-7840 isolation amplifi er 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 diff erential 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.