Datasheet

ADA4938-1/ADA4938-2
Rev. A | Page 14 of 28
26
24
22
20
18
16
14
12
10
10 500100
NOISE FIGURE (dB)
FREQUENCY (MHz)
06592-136
G = +1
G = +2
G = +4
Figure 37. Noise Figure vs. Frequency
060555045403530252015105
10
–10
–8
–6
–4
–2
0
2
4
6
8
VOLTAGE (V)
TIME (5ns/DIV)
V
IN
× 3.16
V
OUT
, dm
06592-137
Figure 38. Overdrive Recovery Time (Pulse Input)
050045040035030025020015010050
12
–12
–10
–8
–6
–4
–2
0
2
4
6
8
10
VOLTAGE (V)
TIME (50ns/DIV)
V
IN
× 3.16
V
OUT
, dm
06592-138
Figure 39. Overdrive Amplitude Characteristics (Triangle Wave Input)
06592-039
100
10
1
10 100 1k 10k 100M100k 1M 10M
INPUT VOLTAGE NOISE (nV/ Hz)
FREQUENCY (Hz)
Figure 40. Input Voltage Noise vs. Frequency
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–0.5
VOLTAGE (V)
TIME (200ns/DIV)
PD INPUT
NEGATIVE OUTPUT
06592-140
Figure 41. Power-Down Response Time
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0
45
40
35
30
25
20
15
10
5
0
CURRENT (mA)
VOLTAGE (V)
+85°C
+25°C
–40°C
06592-141
Figure 42. Supply Current vs. Power-Down Voltage and Temperature