In my thesis I compare conventional weighed binary processing with time-encoded stochastic computing. This includes power consumption during processing as well as power consumption in the analog-to-digital conversion. I use two LTC6992s to generate voltage controlled PWM signals (192kHz and 180kHz) and one ADC (LTC6992) for comparison. I would have loved to find out that I can save power by replacing conventional ADC’s with voltage-controlled pulse-with-generators.
However, the data sheets say (and my measurements confirm) that the LTC6992 requires more power than the LTC1098 (@5V). Approximately 0.5mW for the LTC1098 and 1.75mW for each LTC6992. Now I am searching for possible explanations.
- Are the two chips are manufactured in different technology nodes?
- Is it because the LTC6992 is not optimized for efficiency and is highly customizable?
- Do you know of parts or circuits that perform the same conversion more efficiently? I do not require the huge frequency range of the LTC6992; I just need to fixed frequencies. I also do not need 2.25V to 5.5V Single Supply Operation.
Thank you in advance.