Avago has announced two new miniature voltage/current threshold detection optocouplers for use in a wide range of industrial control applications. The ACPL-K370/K376 optocouplers are designed to detect AC/DC sources and convert the voltage to a logic interface across an optical coupling barrier to provide safe isolation in electronically noisy environments. These optocouplers are suitable for use in applications such as limit switch sensors, low-voltage detectors, relay contact monitors, relay coil voltage monitors and current sensors.
The new ACPL-K370/K376 series, which is an upgrade from Avago’s HCPL-0370/3700/3760 optocoupler family, utilises threshold sensing input buffer ICs which permit control of threshold levels over a wide range of input voltages up to 1140 Vpeak, with a single external resistor. The new devices are offered in a small stretched SO-8 (SSO-8) package which meets 8 mm clearance and creepage requirements. Additionally, the input buffer offers several features to enhance threshold sensing, such as hysteresis for extra noise and switching immunity, a diode bridge for easy use with AC input signals, and internal clamping diodes to protect the buffer and light emitting diode (LED) from over-voltage and over-current transients.
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