AD9246 datasheet(13/45 Pages) AD

13 / 45 page

AD9246

Rev. A | Page 12 of 44

–140

62.500

FREQUENCY (MHz)

–20

–40

–60

–80

–100

–120

15.625

31.250

46.875

125MSPS

225.3MHz @ –1dBFS

SNR = 70.3dB (71.3dBFS)

ENOB = 11.3 BITS

SFDR = 80.4dBc

Figure 18. AD9246-125 Single-Tone FFT with fIN = 225.3 MHz

–140

62.500

FREQUENCY (MHz)

–20

–40

–60

–80

–100

–120

15.625

31.250

46.875

125MSPS

300.3MHz @ –1dBFS

SNR = 69.3dB (70.3dBFS)

ENOB = 11 BITS

SFDR = 77.5dBc

Figure 19. AD9246-125 Single-Tone FFT with fIN = 300.3 MHz

120

–90

INPUT AMPLITUDE (dBFS)

SNR (dBFS)

SFDR (dBFS)

SNR (dBc)

SFDR (dBc)

85dB REFERENCE LINE

100

–80

–70

–60

–50

–40

–30

–20

–10

Figure 20. AD9246 Single-Tone SNR/SFDR vs. Input Amplitude (AIN)

with fIN = 2.4 MHz

250

INPUT FREQUENCY (MHz)

100

150

200

SFDR = –40°C

SNR = –40°C

SFDR = +25°C

SNR = +25°C

SFDR = +85°C

SNR = +85°C

Figure 21. AD9246 Single-Tone SNR/SFDR vs. Input Frequency (fIN) and

Temperature with 2 V p-p Full Scale

250

INPUT FREQUENCY (MHz)

100

150

200

SFDR = –40°C

SNR = –40°C

SFDR = +25°C

SNR = +25°C

SFDR = +85°C

SNR = +85°C

Figure 22. AD9246 Single-Tone SNR/SFDR vs. Input Frequency (fIN) and

Temperature with 1 V p-p Full Scale

–1.00

–40

TEMPERATURE (°C)

–20

204060

–0.25

–0.50

–0.75

OFFSET ERROR

GAIN ERROR

Figure 23. AD9246 Gain and Offset vs. Temperature

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