AD9642 datasheet(16/29 Pages) AD

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Data Sheet

AD9642

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INPUT AMPLITUDE (dBFS)

SFDR (dBFS)

SFDR (dBc)

IMD3 (dBFS)

IMD3 (dBc)

–90.0 –81.7 –73.4 –65.1 –56.8 –48.5 –40.2 –31.9 –23.6 –15.3 –7.0

Figure 34. AD9642-250 Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN)

with fIN1 = 89.12 MHz, fIN2 = 92.12 MHz, fS = 250 MSPS

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INPUT AMPLITUDE (dBFS)

SFDR (dBFS)

SFDR (dBc)

IMD3 (dBFS)

IMD3 (dBc)

–90.0 –81.7 –73.4 –65.1 –56.8 –48.5 –40.2 –31.9 –23.6 –15.3

–7.0

Figure 35. AD9642-250 Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN)

with fIN1 = 184.12 MHz, fIN2 = 187.12 MHz, fS = 250 MSPS

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125

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FREQUENCY (MHz)

250MSPS

89.12MHz @ –7.0dBFS

92.12MHz @ –7.0dBFS

SFDR = 88dBc (95dBFS)

Figure 36. AD9642-250 Two-Tone FFT with fIN1 = 89.12 MHz, fIN2 = 92.12 MHz

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FREQUENCY (MHz)

250MSPS

184.12MHz AT –7dBFS

187.12MHz AT –7dBFS

SFDR = 87dBc (94dBFS)

100

125

Figure 37. AD9642-250 Two Tone FFT with fIN1 = 184.12 MHz, fIN2 = 187.12 MHz

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SAMPLE RATE (MSPS)

SNR

SFDR

Figure 38. AD9642-250 Single-Tone SNR/SFDR vs. Sample Rate (fS)

with fIN = 90 MHz

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N – 4 N – 3 N – 2 N – 1

N + 1 N + 2 N + 3 N + 4 N + 5

OUTPUT CODE

0.847LSB rms

16,384 TOTAL HITS

Figure 39. AD9642-250 Grounded Input Histogram, fS = 250 MSPS

Rev. B | Page 15 of 28

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