Hello,
I'm checking ADC3660 datasheet.
This is its parameters.
- input full scale : 3.2Vpp
- input common mode voltage : 0.95V
- VREF : 1.6V
With a differential driver IC, I have designed following.
- Vocm for the driver : 0.95V
- Vmin , Vmid, Vmax, Vfullscale of the driver output pins : 0.15V, 0.95V, 1.75V , 1.6V
With above parameters, I have a question.
In the ADC3660, the VREF is 1.6V and the Vmax of the input pin is 1.75V.
In ordinary ADCs,the Vmax of the pin is same to VREF.
So, I expected following new parameters.
- To use the VREF as 1.6V, change Vocm as 0.8V.
So, Vmin, Vmid, Vmax, Vfullscale of the dirver ic : 0V, 0.8V, 1.6V, 1.6V
And the Vfullscale of the ADC is 3.2V.
Q : Does the parameters of the ADC3660 correct?
Do I must see it differently to ordinary ADC?
Or, does the my design for differential driver IC have mistake?