Datasheet

AD688
Rev. B | Page 10 of 16
FREQUENCY (Hz)
100
–20
10 10M100
OPEN-LOOP GAIN (dB)
1k 10k 100k 1M
80
60
40
20
0
GAIN
PHASE
0
–180
–30
–60
–90
–120
–150
PHASE (Degrees)
00815-015
Figure 14. A3, A4 Open-Loop Frequency Response
00815-016
FREQUENCY (Hz)
110
0
10 10M100
CMRR (dB)
1k 10k 100k 1M
100
80
60
40
20

V
S
= ± 15V
V
CM
= 1V p-p 25 ° C
Figure 15. A3, A4 CMR vs. Frequency
FREQUENCY (Hz)
110
10
10 10M100
POWER SUPPLY REJECTION (dB)
1k 10k 100k 1M
100
80
60
40
20
V
S
= ±15V WITH
1V p-p SINE WAVE
+SUPPLY
–SUPPLY
00815-017
Figure 16. A3, A4 PSR vs. Frequency
00815-018
FREQUENCY (Hz)
1 10k10
NOISE SPECTRAL DENSITY (nV/ Hz)
100 1k
100
90
0
80
70
60
50
40
30
20
10
Figure 17. Input Noise Voltage Spectral Density
00815-019
100
90
10
0%
5V
50
µ s
Figure 18. Unity-Gain Follower Pulse Response (Large Signal)
00815-020
100
90
10
0%
50mV
2
µ s
Figure 19. Unity-Gain Follower Pulse Response (Small Signal)