I have two analog signals with frequencies up to 8kHz. I need to select one of the signals using a digital logic select. How can I do this? I need the most reliable IC as our system demands the highest reliability.
You can use a SPDT analog switch for this.
The Fairchild FSA5157 is a single-supply SPDT switch with a range of 0 to +V, where the supply voltage (V) can be from 1.8v to 3.3v. The maximum on resistance is 0.7 Ω. It is rated for a continuous switched current of 350 mA.
The FSA5157 is available from Digi-Key for $0.78 in single quantities