Hi
First Question:
If I use external reference 4.096 volt and REFBUFEN connected to VDD like following diagram, then ADC input differential voltage range 8Volt peak to peak? am I right?
Second Question:
Can i use external reference 5volt? If yes, then ADC input differential voltage range 10Volt peak to peak?
Hi,
Yes, when you use the external reference at 4.096V the differential voltage can range from +-4.096V (8Vp-p). Same response as the 5V reference. the differential voltage can range from +-5V (10Vp-p). See the table below.
Regards,
Andrei
Hi
According to your answer using External Ref = 5 volts, we are able to give a differential input voltage range of +-5V(10Vp-p). How about an ADC Supply of 5 volts? It's not saturated with the input signal range; there is no headroom.
Would you recommend using a 5-volt external Reference with an ADC 5-volt Supply? Or do I have to go 4.096-volt reference with an ADC 5 Volt Supply?
5-volt external Reference due to Datasheet page 22. Provide us with high SNR.
