I'm using the ADA4899-1 in the CP-8-2 package. When the DISABLE input is floated what does the output, pin 7, of the amplifier do?
I have a circuit with two amplifiers and want to mux them together. The inputs to each amp are opposite polarity and I want to use the DISABLE to select the proper polarity for followup circuits. The circuit runs off +/- 5 volts and each amplifier is configured as a unity gain buffer (pin 2 connected to pin 3). Each amp by itself works fine when enabled. When an amplifier is disabled (DISABLE input brought to ground) the outputs don't TRI-State as I thought they should. Anyway when I connect the outputs of the two amps together the disabled amp is messing with the enabled amp. Should I use a 10K feed back resistor rather then a short between pins 2 and 7?