I have a problem with the ADC full scale output. I m waiting a full scale of Vp_p ~ 2V, but i m getting only ~1.3 Vp_p.
ADC_frequency = 70 MHz
V_sense = GND
V_ref = +1V (internal reference)
Vcc = +1.8V
Vcm = 0.9 V (internal)
Output = Offset Binary
Vin+ - Vin- ---> Differential
so i thought the design should work for a 0 - ~2 Vp_p input signal with commode mode voltage at 0.9 V.
ADC V_ref register is kept at default (0x11) 2V;Even i tried with (0x10) 1.75Vp_p; but by 1.3 Vp_p i m getting full scale values.
Can anyone please help me? thanks in advance.