ADI's ADG5404F fault protection and detection 4-channel multiplexer. The device consists of four single channels with fail-safe inputs. The ADG5404F switches one of the four inputs to a common drain D, which is determined by the 2-bit binary address lines (A0 and A1). When switched on, each channel has the same conductivity in both directions, and the input signal range of each switch is extended to the power supply. In addition, the digital inputs are compatible with 3V logic inputs over the entire operating power range.
The switch remains open and the channel input presents high impedance without power. Under normal operating conditions, if the analog input signal level on any of the Sx pins exceeds a threshold voltage VT of VDD or VSS, the channel will shut down and the Sx pin becomes high impedance. If the channel is open, the drain pin reacts based on the drain response (DR) input pin. If the DR pin is left floating or pulled high, the drain remains high impedance and left floating. If the DR pin is pulled low, the drain will be pulled to an excess voltage rail. The input signal level up to + 55V or −55V with respect to the ground is blocked on power and power off conditions.
The ADG5404F has a low on-resistance (typical) of 10Ω (typical) and a flat on-resistance flatness (maximum) of 0.5ohm (maximum) over a wide range of the entire signal range, making it a data acquisition Ideal solution for gain switching applications where excellent linearity and low distortion are essential.
Applications include analog input / output modules, process control / distributed control systems, data acquisition, instrumentation, avionics, automatic test equipment, communication systems, and relay replacement.
