HCPL-7840-300E-BROADCOM -Optocoupler, Optically Isolated Amplifiers, 1 Channel, Surface Mount DIP, 8 Pins, 3.75 kV, 100 kHz

The Broadcom® HCPL-7840 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-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. Since common-mode voltage swings of several hundred volts in tens of nanoseconds are common in modern switching inverter motor drives, the HCPL-7840 was designed to ignore very high common-mode transient slew rates (of at least 10 kV/μs).

Applications:

1. Motor phase and rail current sensing
2. Inverter current sensing
3. Switched mode power supply signal isolation
4. General-purpose current sensing and monitoring
5. General-purpose analog signal isolation

---

Features:

1. 15 kV/μs common-mode rejection at VCM = 1000V
2. Compact, auto-insertable standard 8-pin DIP package
3. 0.00025V/V/°C gain drift vs. temperature
4. 0.3-mV input offset voltage
5. 100-kHz bandwidth
6. Advanced Sigma-Delta (Σ-Δ) A/D converter technology
7. Fully differential circuit topology
8. 0.8-μm CMOS IC technology

---

Package Includes:

1 x HCPL-7840-300E-BROADCOM -Optocoupler, Optically Isolated Amplifiers, 1 Channel, Surface Mount DIP, 8 Pins, 3.75 kV, 100 kHz