AD9683 datasheet(13/44 Pages) AD

13 / 44 page

Data Sheet

AD9683

Rev. 0 | Page 13 of 44

TYPICAL PERFORMANCE CHARACTERISTICS

AVDD = 1.8 V, DRVDD = 1.8 V, DVDD = 1.8 V, maximum sample rate for speed grade, VIN = −1.0 dBFS, 1.75 V p-p differential input,

DCS enabled, 16k sample, TA = 25°C, default SPI, unless otherwise noted.

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FREQUENCY (MHz)

THIRD HARMONIC

170MSPS

90.1MHz AT –1.0dBFS

SNR = 70.7dB (71.7dBFS)

SFDR = 89dBc

SECOND HARMONIC

Figure 5. AD9683-170 Single-Tone FFT with fIN = 90.1 MHz

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FREQUENCY (MHz)

THIRD HARMONIC

SECOND HARMONIC

170MSPS

90.1MHz AT –1.0dBFS

SNR = 71.1dB (72.1dBFS)

SFDR = 88dBc

Figure 6. AD9683-170 Single-Tone FFT with fIN = 90.1 MHz, RFCLK = 680 MHz

with Divide by 4 (Address 0x09 = 0x21)

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FREQUENCY (MHz)

170MSPS

185.1MHz AT –1.0dBFS

SNR = 69.6dB (70.6 dBFS)

SFDR = 90dBc

SECOND

HARMONIC

THIRD

HARMONIC

Figure 7. AD9683-170 Single-Tone FFT with fIN = 185.1 MHz

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FREQUENCY (MHz)

170MSPS

185.1MHz AT –1dBFS

SNR = 70.1dB (71.1dBFS)

SFDR = 84dBc

SECOND

HARMONIC

THIRD

HARMONIC

Figure 8. AD9683-170 Single-Tone FFT with fIN = 185.1 MHz,

RFCLK = 680 MHz with Divide by 4 (Address 0x09 = 0x21)

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FREQUENCY (MHz)

170MSPS

305.1MHz AT –1.0dBFS

SNR = 67.6dB (68.6dBFS)

SFDR = 85dBc

SECOND

HARMONIC

THIRD

HARMONIC

Figure 9. AD9683-170 Single-Tone FFT with fIN = 305.1 MHz

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120

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INPUT AMPLITUDE (dBFS)

SNR (dBFS)

SNR (dBc)

SFDR (dBc)

SFDR (dBFS)

Figure 10. AD9683-170 Single-Tone SNR/SFDR vs. Input Amplitude (AIN)

with fIN = 185.1 MHz

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