Date: 03/05/2011

Monolithic 320V isolated analog switch array replaces mechanical relays

Clare, Inc., a wholly owned subsidiary of IXYS Corporation has made available the CPC7514Z Quad High-Voltage Isolated Analog Switch Array for use in industrial controls, instrumentation, automatic test equipment and telecom applications. The CPC7514Z integrated circuit (IC) features four independently controlled, 320V bidirectional normally open (1-Form-A) relays actuated by latched TTL logic-level control signals.

The monolithic silicon featuring high voltage DMOS structures and low voltage CMOS circuitry, is biased by a 3.3V power supply eliminating the requirement for external high-voltage supplies for proper operation. Switch-output to logic-input isolation is +/- 320V.

Designed to provide flexible single-ended or differential access to high voltage networks, the CPC7514Z may also be configured as two sets of matched pair switches for improved differential performance. The switch pairs have an on-resistance matching specification
of 0.8 Ohm maximum over the industrial temperature range of -40 to +85 degrees Celsius.

The individual switches have active current limiting protection for fault events which limits the low frequency currents to 200mA. Under serious high power fault conditions, which may raise the IC junction temperature, a thermal shutdown protection feature is provided. Between the initial current-limit and the thermal-shutdown events, a secondary, low-level, current-limit mode is provided to limit the power dissipation of the
switches. Protection continues until the fault is removed.

"With the combination of our Zilog MCUs as the digital brain, our customers can achieve full digital control for advanced power management and applications as listed below," said Dr. Nathan Zommer, CEO of IXYS Corporation.