Analog Devices introduced a quad-channel protector and two multiplexers (MUX) offering ±55 V over-voltage protection (OVP) for precision converters, amplifiers and other components that operate from a low voltage of 4,5 V up to 36 V.
The ADG5462F quad channel protector, ADG5248F 8:1 multiplexer and ADG5249F differential 4:1 multiplexer offer OVP in power-on and power-off stages and provide robust, precision protection against hot-swapping and operator misuse events, thereby protecting downstream analog components. By providing on-chip fault diagnostics, the new devices detect and avoid defective channels, which simplifies fault detection algorithms and improves system uptime.
The new products maximise design flexibility by enabling users to define fault-trigger levels independent of primary supplies. By also removing the need for multiple discrete protection components, the chips optimise PCB area and simplify the design process. They are optimised for precision instrumentation, process control and avionics applications.
The ADG5248F 8:1 multiplexer and ADG5249F differential 4:1 multiplexer maximise throughput for small-signal measurement such as thermocouples or resistance temperature detectors (RTDs) by offering low-fault leakage of 70 nA and on-leakage of 20 nA. These levels ensure that the user can take accurate measurements when other multiplexer I/O channels are in an over-voltage fault condition.
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