Fault Protection, 6 Ω RON, SPST Switch with0.6 kΩ Feedback ChannelData SheetADG5401FFEATURESFUNCTIONAL BLOCK DIAGRAMAnalog output protection and detection solutionADG5401FOvervoltage protection up to ±60 V on S and SFB pinsDSPower off protection up to ±60 V on S and SFB pins Integrated 0.6 kΩ secondary feedback channelPOCKnown output under all conditionsUser enabled, power-on condition pulls source to 0 VDFBSFBKnown state without digital inputs present 001 INFFOptimized resistance for measurement channel and 22052- feedback channel Figure 1. Low on resistance of 6 Ω typical on signal channelGENERAL DESCRIPTIONUltraflat, on resistance on signal channelLatch-up immune The ADG5401F main channel switch is a SPST, low on-resistance 3 mm × 2 mm LFCSP switch that features overvoltage protection, power off protection, V and overvoltage detection on the source pins (S and SFB). The SS to VDD −2 V signal rangeFully specified at ±15 V, ±20 V, +12 V, and +36 V ADG5401F also features a protected secondary feedback channel ±5 V to ±22 V dual-supply operation for use with digital-to-analog converter (DAC) or amplifier outputs. 8 V to 44 V single-supply operation When no power supplies are present, the switch remains in the APPLICATIONS off condition, and the switch inputs are high impedance. DAC output protection When powered, if the analog input signal levels on the S pin Amplifier output protection exceed VDD or VSS by a threshold voltage (VT) the switch turns Analog output modules off, the open-drain FF pin pulls to a logic low and a path between Process control/distributed control systems the D and DFB pins is switched on to prevent an open-loop Data acquisition condition on the amplifier output. Input signal levels up to +60 V Instrumentation or −60 V relative to ground are blocked, in both the powered and COMPANION PRODUCTS unpowered condition. The selectable POC pin function allows the protected switch terminal, S, to be connected to GND to Current/Voltage Output DAC: AD5423 minimize glitches on the output. The switch turns on with a Precision Amplifier: ADA4077-1Rail-to-Rail Output, JFET Op Amp: ADA4625-1 Logic 1 input and conducts equal y wel in both directions. The