AD9690 datasheet(20/79 Pages) AD

20 / 79 page

Data Sheet

AD9690

Rev. B | Page 19 of 78

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FREQUENCY (MHz)

AIN = −1dBFS

SNR = 63.0dBFS

ENOB = 10.0 BITS

SFDR = 69dBFS

BUFFER CONTROL 1 = 8.0×

Figure 36. Single-Tone FFT with fIN = 1310.3 MHz

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FREQUENCY (MHz)

AIN = −1dBFS

SNR = 61.5dBFS

ENOB = 9.8 BITS

SFDR = 69dBFS

BUFFER CONTROL 1 = 8.0×

Figure 37. Single-Tone FFT with fIN = 1710.3 MHz

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–120

–100

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FREQUENCY (MHz)

AIN = −1dBFS

SNR = 60.8dBFS

ENOB = 9.6 BITS

SFDR = 68dBFS

BUFFER CONTROL 1 = 8.0×

Figure 38. Single-Tone FFT with fIN = 1950.3 MHz

300 320 340 360 380 400

SAMPLE FREQUENCY (MHz)

420 440 460 480 500 530 550

SFDR

SNR

Figure 39. SNR/SFDR vs. fS, fIN = 170.3 MHz; Buffer Control 1 = 2.0×

100

10.3

95.3

150.3

180.3

240.3

301.3

340.7

390.3

450.3

ANALOG INPUT FREQUENCY (MHz)

2.0× SNR

2.0× SFDR

4.5× SNR

4.5× SFDR

Figure 40. SNR/SFDR vs. fIN; fIN < 500 MHz;

Buffer Control 1 (0x018) = 2.0× and 4.5×

100

450.3

480.3

510.3

515.3

610.3

765.3

810.3

985.3

1010.3

ANALOG INPUT FREQUENCY (MHz)

4.0× SNR

4.0× SFDR

8.0× SNR

8.0× SFDR

Figure 41. SNR/SFDR vs. fIN; 500 MHz < fIN < 1 GHz;

Buffer Control 1 (0x018) = 4.0× and 8.0×

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