Input impedance

+/-10mV, +/-100mV, +/-1V = 100 megohm min., +/-5V, +/-10V, +/-100V = 1 megohm min
100 megohm min
1M?
1M?/10pF
1M?/12pF
1M?/13pF
1M?/14pF
1M?/15pF
1M?/16pF
1M?/20pF
1M?/22pF
1M?/9pF
200k?/8pF
50?