ADA4950-2YCPZ-R7 datasheet(14/26 Pages) AD

14 / 26 page

ADA4950-1/ADA4950-2

Data Sheet

Rev. B | Page 14 of 26

–60

–50

–40

–30

–20

–10

100

1000

FREQUENCY (MHz)

RL, dm = 200Ω

VIN, dm = 100mV p-p

INPUT SINGLE-ENDED, 50Ω LOAD TERMINATION

OUTPUT DIFFERENTIAL, 100Ω SOURCE TERMINATION

S11: SINGLE-ENDED-TO-SINGLE-ENDED

S22: DIFFERENTIAL-TO-DIFFERENTIAL

S11

S22

Figure 37. Return Loss (S11, S22) vs. Frequency

100

1000

100

10k

100k

10M

FREQUENCY (Hz)

G = 1

G = 2

G = 3

Figure 38. Voltage Noise Spectral Density for Various Gains,

Referred to Output

–0.06

–0.04

–0.02

0.02

0.04

0.06

TIME (ns)

G = 1

G = 2

G = 3

Figure 39. Small-Signal Pulse Response for Various Gains

0.1

100

0.1

100

FREQUENCY (MHz)

+OUT

–OUT

VOUT, dm

Figure 40. Closed-Loop Output Impedance Magnitude vs. Frequency, G = 1

–5

–10

–15

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

TIME (µs)

2 × VIN

VOUT, dm

Figure 41. Overdrive Recovery, G = 2

–1.5

–1.0

–0.5

0.5

1.0

1.5

TIME (ns)

G = 3

G = 2

G = 1

Figure 42. Large-Signal Pulse Response for Various Gains

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