AD9684 datasheet(21/65 Pages) AD

21 / 65 page

AD9684

Data Sheet

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FREQUENCY (MHz)

AIN = −1dBFS

SNR = 61.7dBFS

ENOB = 9.9 BITS

SFDR = 70dBFS

BUFFER CONTROL 1 = 8.0×

Figure 18. Single Tone FFT with fIN = 1205.3 MHz

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FREQUENCY (MHz)

AIN = −1dBFS

SNR = 60.1dBFS

ENOB = 9.7 BITS

SFDR = 71dBFS

BUFFER CONTROL 1 = 8.0×

Figure 19. Single Tone FFT with fIN = 1630.3 MHz

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FREQUENCY (MHz)

AIN = −1dBFS

SNR = 59.0dBFS

ENOB = 9.5 BITS

SFDR = 69dBFS

BUFFER CONTROL 1 = 8.0×

Figure 20. Single Tone FFT with fIN = 985.3 MHz

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ANALOG INPUT FREQUENCY (MHz)

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SFDR

SNR

2.0×

3.0×

4.0×

Figure 21. SNR/SFDR vs. Analog Input Frequency (fIN);

fIN < 500 MHz; Buffer Control 1 Setting = 2.0×, 3.0×, and 4.0×

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FREQUENCY (MHz)

AIN1 AND AIN2 = –7dBFS

SFDR = 88dBFS

IMD2 = 95dBFS

IMD3 = 88dBFS

BUFFER CONTROL 1 = 2.0×

Figure 22. Two-Tone FFT with fIN1 = 184 MHz and fIN2 = 187 MHz

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FREQUENCY (MHz)

AIN1 AND AIN2 = –7dBFS

SFDR = 87dBFS

IMD2 = 94dBFS

IMD3 = 87dBFS

BUFFER CONTROL 1 = 2.0×

Figure 23. Two-Tone FFT; fIN1 = 338 MHz, fIN2 = 341 MHz

Rev. 0 | Page 20 of 64

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