HCPL-7520 is a family of isolated linear current sensing ICs designed for current sensing in low-power electronic motor drives.
The HCPL-7520 isolated linear current‑sensing IC family is designed for low‑power motor‑drive applications. It senses the voltage drop across an external sense resistor and provides a single‑ended output proportional to motor current, while tolerating high common‑mode transients up to 10 kV/µs.
Key features include a compact 8‑pin DIP package (with a gull‑wing surface‑mount option), 15 kV/µs common‑mode rejection, 60 ppm/°C gain drift, 0.06 % nonlinearity, and a 100 kHz bandwidth. The device meets worldwide safety approvals (UL 1577, CSA, IEC/EN/DIN EN 60747‑5‑2) and can also be used for general analog signal isolation.
| Common‑mode rejection | 15 kV/µs at Vem = 1000 V |
|---|---|
| Gain drift | 60 ppm/°C |
| Bandwidth | 100 kHz |
| Nonlinearity | 0.06 % (single‑ended output) |
| Withstand voltage | 3750 V rms (1 min) |
| Supply voltage | 45‑55 V |
The HCPL‑7520 is smaller, offers better linearity, lower offset versus temperature, and superior common‑mode rejection than most Hall‑effect sensors.
It can withstand a momentary (1 minute) voltage of 3750 V rms according to UL 1577 and CSA specifications.
The gain drifts about 60 ppm per degree Celsius.