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HCPL-7520 - Isolated Linear Sensing IC

General Description

The HCPL-7520 isolated linear current sensing IC family is designed for current sensing in low-power electronic motor drives.

In a typical implementation, motor current flows through an external resistor and the resulting analog voltage drop is sensed by the HCPL-7520.

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Agilent HCPL-7520 Isolated Linear Sensing IC Data Sheet Description The HCPL-7520 isolated linear current sensing IC family is designed for current sensing in low-power electronic motor drives. In a typical implementation, motor current flows through an external resistor and the resulting analog voltage drop is sensed by the HCPL-7520. An output voltage is created on the other side of the HCPL-7520 optical isolation barrier. This single-ended output voltage is proportional to the motor current. Since common-mode voltage swings of several hundred volts in tens of nanoseconds are common in modern switching inverter motor drives, the HCPL7520 was designed to ignore very high common-mode transient slew rates (of at least 10 kV/µs).