I've got this Variable Gain Amplifier (AD8369) that I'm using to drive my ADC (AD9283). The problem is that the Variable Gain Amplifier requires a load impedance of 1k.
However, I'm not able to find any information from the ADC datasheet about what the ADC input impedance is.
All I know from the datasheet is that it is a "bit-per-stage pipeline type converter utilizing switch capacitor techniques."
VGA Datasheet:ADC Datasheet:
Does anyone know whether the input impedance should be specified in the datasheet? If not, how do you find/calculate the input impedance of a bit-per- stage ADC?