ada4950-1 Analog Devices, Inc., ada4950-1 Datasheet - Page 14

• Manufacturer Part Number: ada4950-1
• Description: Low Power, Selectable Gain Differential Adc Driver, G = 1, 2, 3
• Manufacturer: Analog Devices, Inc.

ADA4950-1/ADA4950-2
–0.02
–0.04
–0.06
1000
0.06
0.04
0.02
–10
–20
–30
–40
–50
–60
100
Figure 38. Voltage Noise Spectral Density for Various Gains,
10
1
Figure 39. Small-Signal Pulse Response for Various Gains
0
0
1
1
0
INPUT SINGLE-ENDED, 50Ω LOAD TERMINATION
OUTPUT DIFFERENTIAL, 100Ω SOURCE TERMINATION
S11: SINGLE-ENDED-TO-SINGLE-ENDED
S22: DIFFERENTIAL-TO-DIFFERENTIAL
R
V
G = 1
G = 2
IN, dm
Figure 37. Return Loss (S
L, dm
G = 1
G = 3
10
= 200Ω
= 100mV p-p
5
S11
S22
G = 2
100
Referred to Output
10
10
FREQUENCY (MHz)
FREQUENCY (Hz)
G = 3
1k
TIME (ns)
11
15
, S
10k
22
) vs. Frequency
100
20
100k
25
1M
1000
10M
30
Rev. 0 | Page 14 of 28
Figure 40. Closed-Loop Output Impedance Magnitude vs. Frequency, G = 1
–0.5
–1.0
–1.5
–10
–15
1.5
1.0
0.5
15
10
–5
100
Figure 42. Large-Signal Pulse Response for Various Gains
0.1
5
0
1k
10
0
1
0
0.1
0
G = 1
G = 2
G = 3
0.1
Figure 41. Overdrive Recovery, G = 2
+OUT
V
–OUT
5
0.2
OUT, dm
1
0.3
10
FREQUENCY (MHz)
0.4
TIME (µs)
TIME (ns)
0.5
15
10
2 × V
0.6
IN
20
V
0.7
OUT, dm
100
0.8
25
0.9
1.0
30
1k