AD9272 datasheet(18/45 Pages) AD

18 / 45 page

AD9272

Rev. C | Page 17 of 44

100

125

150

FREQUENCY (MHz)

GAIN+ = 1.6V

GAIN+ = 0.8V

GAIN+ = 0V

Figure 17. Antialiasing Filter (AAF) Group Delay Response

–90

–80

–70

–60

–50

–40

–30

–20

–10

INPUT FREQUENCY (MHz)

GAIN+ = 1.6V

GAIN+ = 1.0V

GAIN+ = 0.4V

Figure 18. Second-Order Harmonic Distortion vs. Frequency, AIN = −1 dBFS

–80

–70

–60

–50

–40

–30

–20

–10

INPUT FREQUENCY (MHz)

GAIN+ = 1.6V

GAIN+ = 1.0V

GAIN+ = 0.4V

Figure 19. Third-Order Harmonic Distortion vs. Frequency, AIN = −1 dBFS

–120

–100

–80

–60

–40

–20

–50

–40

–30

–20

–10

ADC OUTPUT LEVEL (dBFS)

GAIN+ = 1.6V

GAIN+ = 0.8V

GAIN+ = 0V

Figure 20. Second-Order Harmonic Distortion vs. ADC Output

–120

–100

–80

–60

–40

–20

–40

–35

–30

–25

–20

–15

–10

–5

ADC OUTPUT LEVEL (dBFS)

GAIN+ = 1.6V

GAIN+ = 0.8V

GAIN+ = 0V

Figure 21. Third-Order Harmonic Distortion vs. ADC Output Level

–90

–80

–70

–60

–50

–40

–30

–20

–10

0.4

0.6

0.8

1.0

1.2

1.4

1.6

GAIN+ (V)

8MHz

2.3MHz

5MHz

fIN2 = fIN1 +0.01MHz

AIN1 = –1dBFS, AIN2 = –21dBFS

Figure 22. IMD3 vs. GAIN+

AD9272 Datasheet(PDF) 18 Page - Analog Devices

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