AD6641 datasheet(16/28 Pages) AD

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AD6641

Rev. 0 | Page 16 of 28

250

300

350

400

450

500

550

SAMPLE RATE (MSPS)

SFDR @ 30.3MHz, 1.8V

SFDR @ 30.3MHz, 1.9V

SFDR @ 100.3MHz, 1.8V

SFDR @ 100.3MHz, 1.9V

SNRFS @ 30.3MHz, 1.8V

SNRFS @ 30.3MHz, 1.9V

SNRFS @ 100.3MHz, 1.8V

SNRFS @ 100.3MHz, 1.9V

SFDR (dBc)

SNR (dBFS)

Figure 16. SNR/SFDR vs. Sample Rate and Supply

100

–90

–80

–70

–60

–50

–40

–30

–20

–10

AMPLITUDE (dB)

SNRFS, 1.9V

SNR, 1.9V

SFDR, 1.9V

SFDRFS, 1.9V

SNRFS, 1.8V

SNR, 1.8V

SFDR, 1.8V

SFDRFS, 1.8V

SNR (dBFS)

SFDR (dBc)

SNR (dB)

SFDR (dBFS)

Figure 17. SNR/SFDR vs. Input Amplitude; 500 MSPS,140.3 MHz

–1.0

–0.8

–0.6

–0.4

–0.2

0.2

0.4

0.6

0.8

1.0

–1

1023

2047

3071

4095

OUTPUT CODE

Figure 18. INL; 500 MSPS

–0.5

–0.4

–0.3

–0.2

–0.1

0.1

0.2

0.3

0.4

0.5

–1

1023

2047

3071

4095

OUTPUT CODE

Figure 19. DNL; 500 MSPS

0.5

1.0

1.5

2.0

2.5

N– 3

N– 2

N– 1

N + 1

N +2

1.24 LSB rms

N+ 3 MORE

BINS

Figure 20. Grounded Input Histogram; 500 MSPS

FREQUENCY (MHz)

100

125

150

175

200

225

–15

–30

–45

–60

–75

–90

–105

–120

491.52MSPS

fIN1: 121.3MHz @ –7dBFS

fIN2: 124.7MHz @ –7dBFS

SFDR: 85dBc

Figure 21. 16k Point Single-Tone FFT; 491.52 MSPS,

fIN1 = 121.3 MHz, fIN2 = 124.7 MHz

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