http://www.maximintegrated.com/en/p...onverters/digital-potentiometers/MAX5490.html
To use digital pots in a ckt. that counts up from 0 Ohms to 1.5 megohms in increments relative to a clock. Reverses the cycle then repeats the time constant is 2.3 seconds per ohm increase,
To use digital pots in a ckt. that counts up from 0 Ohms to 1.5 megohms in increments relative to a clock. Reverses the cycle then repeats the time constant is 2.3 seconds per ohm increase,