Quote:
Originally posted by krisdz:
It is digital potentiometer not analog right? So if it digital how it could be in analog domain?
Kris
The volume control is implemented by a digitally controlled analog ladder attenuator. The digital words from the processor (via the volume control encoder) control which resistor rungs of the ladder are in circuit and which aren't. These rungs function as a voltage divider, which attenuates the signal. There are 8 ladder attenuator channels, one for each output channel. From the ladder attenuator, the signal goes to the output buffer ICs.