Could someone fill in the missing details from the 6881 spec:
Differential input resistance is 100R typical, what is the tolerance?
Single ended input resistance is 50R typical, again what is the tolerance?
If I set the output common mode range to 2.5V (1.25 on OCM) how much will the output common mode differ from 2.5V? (It's normally a few mV for most differential amps, It affects ADC linearity)
If I configure the device for DC coupled single ended signals the max DC input is 0.7V (page 15, 10dBm).
The absolute max ratings specify -0.6V to 5.5V, operating 0V to 5V. Is there any way I can configure the device to accept larger single ended signals? eg use a 100R resistor on INPS instead of 50R in figure 39?