AD9284 datasheet(10/24 Pages) AD

10 / 24 page

AD9284

Rev. 0 | Page 10 of 24

TYPICAL PERFORMANCE CHARACTERISTICS

AVDD = 1.8 V, DRVDD = 1.8 V, sample rate = 250 MSPS, DCS enabled, 1.2 V p-p differential input, VIN = −1.0 dBFS, 64k sample,

TA = 25°C, unless otherwise noted.

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FREQUENCY (MHz)

250MSPS

4.3MHz @ –1dBFS

SNR = 48.3dB (49.3dBFS)

ENOB = 7.7

SFDR = 70.3dBc

SECOND HARMONIC

THIRD HARMONIC

Figure 4. Single-Tone FFT with fIN = 4.3 MHz

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FREQUENCY (MHz)

250MSPS

330.3MHz @ –1dBFS

SNR = 48.2dB (49.2dBFS)

ENOB = 7.6

SFDR = 60.9dBc

SECOND HARMONIC

THIRD HARMONIC

Figure 5. Single-Tone FFT with fIN = 220.3 MHz

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AIN POWER (dBFS)

SFDR (dBFS)

SNR (dBFS)

SFDR (dBc)

SNR (dBc)

REFERENCE LINE

Figure 6. SFDR/SNR vs. Input Amplitude (AIN) with fIN = 2.2 MHz

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FREQUENCY (MHz)

250MSPS

96.6MHz @ –1dBFS

SNR = 48.3dB (49.3dBFS)

ENOB = 7.7

SFDR = 70.0dBc

SECOND HARMONIC

THIRD HARMONIC

Figure 7. Single-Tone FFT with fIN = 96.6 MHz

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FREQUENCY (MHz)

250MSPS

29.2MHz @ –7dBFS

32.2MHz @ –7dBFS

SFDR = 69.6dBc (76.6dBFS)

Figure 8. Two-Tone FFT with fIN1 = 29.1 MHz and fIN2 = 32.1 MHz

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AIN POWER (dBFS)

IMD3 (dBFS)

SFDR (dBFS)

IMD3 (dBc)

SFDR (dBc)

Figure 9. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN)

with fIN1 = 29.1 MHz and fIN2 = 32.1 MHz

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