AD827
Figure 20. Crosstalk Test Circuit
Figure 19. Crosstalk vs. Frequency
INPUT PROTECTION PRECAUTIONS
For high performance circuits, it is recommended that a second
resistor (RB in Figures 21a and 22a) be used to reduce bias-
current errors by matching the impedance at each input. This
resistor reduces the error caused by offset voltages by more than
an order of magnitude.
An input resistor (resistor RIN of Figure 21a) is recommended in
circuits where the input common-mode voltage to the AD827
may exceed (on a transient basis) the positive supply voltage.
This resistor provides protection for the input transistors by
limiting the maximum current that can be forced into their
bases.
Figure 21b. Follower Large Signal
Pulse Response
Figure 21c. Follower Sm all
Signal Pulse Response
Figure 21a. Follower Connection
Figure 22b. Inverter Large Signal
Pulse Response
Figure 22c. Inverter Sm all
Signal Pulse Response
Figure 22a. Inverter Connection
–6–
REV. B
ADI [ ADI ]
