AD9690 datasheet(16/79 Pages) AD

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Data Sheet

AD9690

Rev. B | Page 15 of 78

0500

400

300

200

100

FREQUENCY (MHz)

AIN = –1dBFS

SNR = 59.8BFS

ENOB = 9.6 BITS

SFDR = 79dBFS

BUFFER CONTROL 1 = 8.0×

–120

–100

–80

–60

–40

–20

Figure 12. Single-Tone FFT with fIN = 1293.3 MHz

0500

400

300

200

100

FREQUENCY (MHz)

AIN = –1dBFS

SNR = 57.7dBFS

ENOB = 9.2 BITS

SFDR = 70dBFS

BUFFER CONTROL 1 = 8.0×

–120

–100

–80

–60

–40

–20

Figure 13. Single-Tone FFT with fIN = 1725.3 MHz

0500

400

300

200

100

FREQUENCY (MHz)

AIN = –1dBFS

SNR = 57dBFS

ENOB = 9.1 BITS

SFDR = 68dBFS

BUFFER CONTROL 1 = 8.0×

–120

–100

–80

–60

–40

–20

Figure 14. Single-Tone FFT with fIN = 1950.3 MHz

SAMPLE RATE (MHz)

700

750

800

850

900

950

1000

1050

1100

SNR (dBFS)

SFDR (dBFS)

Figure 15. SNR/SFDR vs. Sample Rate (fS), fIN = 170.3 MHz; Buffer Control 1

(0x018) = 3.0×

10.3

63.3

100.3 170.3 225.3

ANALOG INPUT FREQUENCY (MHz)

302.3 341.3 403.3 453.3 502.3

1.5× SFDR (dBFS)

1.5× SNR (dBFS)

3.0× SFDR (dBFS)

3.0× SNR (dBFS)

Figure 16. SNR/SFDR vs. Analog Input Frequency (fIN); fIN < 500 MHz;

Buffer Control 1 (0x018) = 1.5× and 3.0×

100

476.8

554.4

593.2

670.8

748.4

826.0

903.6

981.2

ANALOG INPUT FREQUENCY (MHz)

4.0× SFDR

4.0× SNRFS

6.0× SFDR

6.0× SNRFS

Figure 17. SNR/SFDR vs. Analog Input Frequency (fIN);

500 MHz < fIN < 1 GHz;

Buffer Control1 (0x018) = 4.0× and 6.0×

AD9690 Datasheet(PDF) 16 Page - Analog Devices

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