Datasheet

AD820
Rev. H | Page 12 of 24
00873-017
100
–20
10 10M
FREQUENCY (Hz)
OPEN-LOOP GAIN (dB)
100 1k 10k 100k 1M
80
60
40
20
0
PHASE MARGIN (DEGREES)
100
–20
80
60
40
20
0
GAIN
PHASE
R
L
= 2kΩ
C
L
= 100pF
Figure 16. Open-Loop Gain and Phase Margin vs. Frequency
1k
0.01
100 10M
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
00873-018
1k 10k 100k 1M
0.1
1
10
100
A
CL
= +1
V
S
= ±15V
Figure 17. Output Impedance vs. Frequency
16
–16
0 5
SETTLING TIME (µs)
OUTPUT SWING FROM 0 TO ±V
00873-019
12
8
4
0
–4
–8
–12
1 2 3 4
1%
1%
0.1% 0.01%
ERROR
Figure 18. Output Swing and Error vs. Settling Time
100
0
10 10M
FREQUENCY (Hz)
COMMON-MODE REJECTION (dB)
00873-020
100 1k 10k 100k 1M
90
80
70
60
50
40
30
20
10
V
S
= 0V, +5V V
S
= ±15V
Figure 19. Common-Mode Rejection vs. Frequency
5
0
–1 3
COMMON-MODE VOLTAGE FROM SUPPLY RAILS (V)
COMMON-MODE ERROR VOLTAGE (mV)
00873-021
4
3
2
1
0 1 2
NEGATIVE
RAIL
POSITIVE
RAIL
+25ºC
–55ºC
–55ºC
+125ºC
+125ºC
Figure 20. Absolute Common-Mode Error vs. Common-Mode Voltage
from Supply Rails (V
S
− V
CM
)
1k
1
0.001 100
LOAD CURRENT (mA)
OUTPUT SATURATION VOLTAGE (mV)
00873-022
0.01 0.1 1 10
10
100
V
S
– V
OH
V
OL
– V
S
Figure 21. Output Saturation Voltage vs. Load Current