Datasheet

Data Sheet AD797
Rev. I | Page 9 of 20
00846-021
FREQUENCY (Hz)
MAGNITUDE OF OUTPUT IMPEDANCE (Ω)
100
0.01
10 1M
10
0.1
100
1
10k 100k1k
WITHOUT C
N
*
WITH C
N
*
*SEE FIGURE 33.
Figure 21. Magnitude of Output Impedance vs. Frequency
V
OUT
1kΩ
1kΩ
20pF
V
IN
AD797
*
–V
S
+V
S
*
4
3
6
7
2
00846-022
*SEE FIGURE 36.
Figure 22. Inverter Connection
00846-023
100
90
10
0%
5V
1µs
Figure 23. Inverter Large-Signal Pulse Response
00846-024
100
90
10
0%
50mV 100ns
Figure 24. Inverter Small-Signal Pulse Response
V
OUT
100Ω
600Ω
V
IN
AD797
**
–V
S
+V
S
R
S
*
*V
ALUE OF SOURCE RESIS
T
ANCE
( SEE THE NOISE AND SOURCE IMPEDANCE
CONSIDERATIONS SECTION).
*SEE FIGURE 36.
**
4
3
6
7
2
00846-025
*
Figure 25. Follower Connection
00846-026
100
90
10
0%
5V
1µs
Figure 26. Follower Large-Signal Pulse Response