Analog Devices Inc. ADG5436F Fault Protect & Detect Dual SPDT Switches

When powered on, each switch conducts equally well in both directions, and each switch has an input signal range that extends to the supplies. The digital inputs are compatible with 3V logic inputs over the full operating supply range. When power supplies are absent, the switch remains in the off condition, and the switch inputs are high impedance. Under normal operating conditions, if the analog input signal levels on any Sxx pin exceeds VDD or VSS by a threshold voltage, VT, the switch turns off, and that Sxx pin becomes high impedance. If the channel is on, the drain pin reacts according to the drain response (DR) input pin. If the DR pin is left floating or pulled high, the drain remains high impedance and floats. If the DR pin is pulled low, the drain pulls to the exceeded rail. Input signal levels up to +55V or −55V relative to the ground are blocked, in both the powered and unpowered condition.

The low on-resistance of 10Ω of the ADG5436F switches, combined with an on-resistance flatness of 10Ω over a significant portion of the signal range make the ADG5436F switches well-suited for data acquisition and gain switching applications where excellent linearity and low distortion are critical.