AD9643 datasheet(17/36 Pages) AD

17 / 36 page

AD9643

Rev. A | Page 17 of 36

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–90.0

INPUT AMPLITUDE (dBFS)

SFDR (dBFS)

IMD3 (dBc)

IMD3 (dBFS)

SFDR (dBc)

Figure 12. AD9643-170 Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with

fIN1 = 184.12, fIN2 = 187.12 MHz, fS = 170 MSPS

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020

FREQUENCY (MHz)

170MSPS

89.12MHz @ –7dBFS

92.12MHz @ –7dBFS

SFDR = 89dBc (96dBFS)

Figure 13. AD9643-170 Two-Tone FFT with fIN1 = 89.12, fIN2 = 92.12 MHz,

fS = 170 MSPS

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020

FREQUENCY (MHz)

170MSPS

184.12MHz @ –7dBFS

187.12MHz @ –7dBFS

SFDR = 84dBc (91dBFS)

Figure 14. AD9643-170 Two-Tone FFT with fIN1 = 184.12, fIN2 = 187.12 MHz,

fS = 170 MSPS

100

130 140 150 160

120

110

100

170

SAMPLE RATE (MSPS)

SFDR, CHANNEL B

SNR, CHANNEL B

SFDR, CHANNEL A

SNR, CHANNEL A

Figure 15. AD9643-170 Single-Tone SNR/SFDR vs. Sample Rate (fS)

with fIN = 90.1 MHz

6000

5000

4000

3000

2000

1000

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

N + 1

N – 1

N – 2

N – 3

N – 4

N – 5

OUTPUT CODE

1.34LSB rms

16,379 TOTAL HITS

Figure 16. AD9643-170 Grounded Input Histogram

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THIRD HARMONIC

SECOND HARMONIC

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100

FREQUENCY (Hz)

210MSPS

90.1MHz @ –1dBFS

SNR = 70.6dB (71.6dBFS)

SFDR = 88dBc

Figure 17. AD9643-210 Single-Tone FFT with fIN = 90.1 MHz

AD9643 Datasheet(PDF) 17 Page - Analog Devices

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