AD9248 datasheet(13/49 Pages) AD

13 / 49 page

AD9248

Rev. B | Page 12 of 48

TYPICAL PERFORMANCE CHARACTERISTICS

AVDD, DRVDD = 3.0 V, T = 25°C, AIN differential drive, full scale = 2 V, unless otherwise noted.

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

SNR = 72.6dB

SINAD = 71.9dB

H2 = –81.5dBc

H3 = –86.8dBc

SFDR = 81.5dB

CROSSTALK

SECOND

HARMONIC

THIRD

HARMONIC

Figure 5. Single-Tone FFT of Channel A Digitizing fIN = 12.5 MHz

While Channel B Is Digitizing fIN = 10 MHz

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

SNR = 70.5dB

SINAD = 69.4dB

H2 = –92.3dBc

H3 = –80.1dBc

SFDR = 80.1dBc

SECOND

HARMONIC

THIRD HARMONIC

CROSSTALK

Figure 6. Single-Tone FFT of Channel A Digitizing fIN = 70 MHz

While Channel B Is Digitizing fIN = 76 MHz

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

SNR = 68.1dB

SINAD = 68.0dB

H2 = –83.4dBc

H3 = –83.1dBc

SFDR = 75.1dBc

SECOND HARMONIC

CROSSTALK

Figure 7. Single-Tone FFT of Channel A Digitizing fIN = 120 MHz

While Channel B Is Digitizing fIN = 126 MHz

ADC SAMPLE RATE (MSPS)

100

SNR

SFDR

Figure 8. AD9248-65 Single-Tone SFDR/SNR vs. FS with fIN = 32.5 MHz

SNR

SFDR

SNR

ADC SAMPLE RATE (MSPS)

100

Figure 9. AD9248-40 Single-Tone SFDR/SNR vs. FS with fIN = 20 MHz

SFDR

SNR

ADC SAMPLE RATE (MSPS)

100

Figure 10. AD9248-20 Single-Tone SFDR/SNR vs. FS with fIN = 10 MHz

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