DESCRIPTION
The Broadcom® HCPL-7800A/HCPL-7800 (hereinafter referred to as HCPL-7800(A)), isolation amplifier family is 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-7800(A). A differential output voltage is created on the other side of the HCPL-7800(A) optical isolation barrier. Because common-mode voltage swings of several hundred volts in tens of nanoseconds are common in modern switching inverter motor drives, the HCPL-7800(A) is designed to ignore very high common-mode transient slew rates (of at least 10 kV/µs). The product can also be used for general analog signal isolation applications requiring high accuracy, stability, and linearity under similarly severe noise conditions. For general applications, use the HCPL-7800 (gain tolerance of ± 3%). For precision applications, use the HCPL-7800A with part-to-part gain tolerance of ± 1%.
Broadcom
