BROADCOM HCPL-7840-300E Datasheet & Stock

The HCPL-7840-300E is an Isolation Amplifier designed for current sensing in electronic motor drives. In a typical implementation, motor currents flow through an external resistor and the resulting analogue voltage drop is sensed by this. A differential output voltage is created on the other side of this 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, this was designed to ignore very high common mode transient slew rates (of at least 10kV/μs).




15kV/μs Common-mode rejection at 1000V VCM

0.00025V/V/°C Gain drift vs. temperature

0.3mV Input offset voltage

100kHz Bandwidth

0.004% Nonlinearity

Fully differential circuit topology





Applications


Motor Drive & Control,

Sensing & Instrumentation,

Power Management





Warnings
Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.