ADG528F

FEATURES Low on resistance (300 Ω typical) Fast switching times tON: 250 ns maximum tOFF: 250 ns maximum Low power dissipation (3.3 mW maximum) Fault and overvoltage protection (−40 V to +55 V) All switches off with power supply off Analog output of on channel clamped within power supplies if an overvoltage occurs Latch-up proof construction Break-before-make construction TTL and CMOS compatible inputs APPLICATIONS Existing multiplexer applications (both fault-protected and nonfault-protected) New designs requiring multiplexer functions GENERAL DESCRIPTION The ADG528F1 is a CMOS analog multiplexer, with the comprising eight single channels. This multiplexer provides fault protection. Using a series n-channel, p-channel, n-channel MOSFET structure, both device and signal source protection is provided in the event of an overvoltage or power loss. The multiplexer can withstand continuous overvoltage inputs from −40 V to +55 V. During fault conditions, the multiplexer input (or output) appears as an open circuit and only a few nanoamperes of leakage current will flow. This protects not only the multiplexer and the circuitry driven by the multiplexer, but also protects the sensors or signal sources that drive the multiplexer. The ADG528F switches one of eight inputs to a common output as determined by the 3-bit binary address lines A0, A1, and A2. The ADG528F has on-chip address and control latches that facilitate microprocessor interfacing. An EN input on the device is used to en...