AD9271 datasheet(18/58 Pages) AD

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AD9271

Preliminary Technical Data

Rev. PrA | Page 18 of 58

-108

-107

-106

-105

-104

-103

-102

-101

-100

-99

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Vgain (V)

LNA Gain = 5x

LNA Gain = 6x

LNA Gain = 8x

Figure 23. Short-Circuit, Output-Referred Noise vs. VGAIN

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Vgain (V)

SNR (dBFS)

SINAD (dB)

SINAD (dBFS)

Figure 24. SNR/SINAD vs. Gain

1.4

1.45

1.5

1.55

1.6

1.65

1.7

-40

-20

20406080

Temperature (C)

Figure 25. Short-Circuit, Input-Referred Noise vs. Temperature

-40

-35

-30

-25

-20

-15

-10

-5

2.5

7.5

12.5

17.5

22.5

Frequency (MHz)

(1/3)*50MHz

(1/3)*40MHz

(1/3)*25MHz

-3dB line

Figure 26. Antialiasing Filter (AAF) Pass-Band Response

100

150

200

250

300

350

400

0.1

100

Analog Input Frequency (MHz)

Vgain = 0.0 V

Vgain = 0.5 V

Vgain = 1.0 V

Figure 27. Antialiasing Filter (AAF) Group Delay Response

-85

-80

-75

-70

-65

-60

-55

-50

Fin (MHz)

Vgain=0.2V

Vgain=0.5V

Vgain=1V

Figure 28. Second-Order Harmonic Distortion vs. Frequency

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