Is it a good idea to used PWM capture instead of AD?

I have a microcontroller with the following features:
- A/D on 10 bits
- PWM capture on 16 biti.
Voltage value is transformed by comparison with the sawtooth "in duty cycle" (PWM).

A timer of the controller will measure the duty cycle.

I just want a preliminary answer because I do not have all the data for a complete answer but I will come back.

 

Is it a good idea to used PWM capture instead of AD?

Depends upon what exactly you are trying to do.

 

I remember reading a magazine article about somebody who did that a long time ago using an AVR controller...

http://circuitcellar.com/cc-blog/minimum-mass-waveform-capture/