Datasheet

Data Sheet ADA4940-1/ADA4940-2
Rev. C | Page 17 of 32
8
–8
–6
–4
0
2
4
6
–2
0 1000
OUTPUT VOLTAGE (V)
TIME (ns)
08452-041
100 200 300 400 500 600 700 800
900
G = +2
V
OUT, dm
2 × V
IN
Figure 43. Output Overdrive Recovery, G = 2
100
10
1
10 100
1k 10k
100k 1M
10M
INPUT VOLTAGE NOISE (nV/√Hz)
FREQUENCY (Hz)
08452-037
Figure 44. Voltage Noise Spectral Density, Referred to Input
1.50
–1.25
0
–2.75
0 100
OUTPUT VOLTAGE (V)
DISABLE PIN VOLTAGE (V)
TIME (µs)
08452-038
–2.50
–2.25
–2.00
–1.75
–1.50
–1.25
–1.00
–0.75
–0.50
–0.25
–1.00
–0.75
–0.50
–0.25
0
0.25
0.50
0.75
1.00
1.25
10 20 30 40 50
60 70 80 90
–OUT, V
ICM
= 1V
+OUT, V
ICM
= 1V
DISABLE
+IN
–OUT
+OUT
–FB
+FB
–IN
V
OCM
0.1µF
R1
R2
R2
+2.5V
–2.5V
R1
V
ICM
DISABLE
0V
–2.5V
Figure 45.
DISABLE
Pin Turn-Off Time
2.0
–2.0
0.5
–0.5
0 80
VOLTAGE (V)
ERROR (%)
TIME (ns)
08452-065
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
–1.6
–1.2
–0.8
–0.4
0
0.4
0.8
1.2
1.6
10 20 30 40 50 60 70
%ERROR
OUTPUT
INPUT
V
OUT, dm
= 2V p-p
Figure 46. 0.1% Settling Time
100
10
1
0.1
0.01
0.1 1 10 100
OUTPUT IMPEDANCE (Ω)
FREQUENCY (MHz)
08452-040
Figure 47. Closed-Loop Output Impedance Magnitude vs. Frequency, G = 1
2.50
–0.25 –2.75
0 2.0
OUTPUT VOLTAGE (V)
DISABLE PIN VOLTAGE (V)
TIME (µs)
08452-057
–2.50
–2.25
–2.00
–1.75
–1.50
–1.25
–1.00
–0.75
–0.50
–0.25
0
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
–OUT, V
ICM
= 1V
DISABLE
+OUT, V
ICM
= 1V
+IN
–OUT
+OUT
–FB
+FB
–IN
V
OCM
0.1µF
R1 R2
R2
+2.5V
–2.5V
R1
V
ICM
DISABLE
0V
–2.5V
Figure 48.
DISABLE
Pin Turn-On Time