AD6655 datasheet(24/84 Pages) AD

24 / 84 page

AD6655

Rev. 0 | Page 24 of 84

FREQUENCY (MHz)

TYPICAL PERFORMANCE CHARACTERISTICS

AVDD = 1.8 V, DVDD = 1.8 V, DRVDD = 1.8 V, sample rate = 150 MSPS, DCS enabled, 1.0 V internal reference, 2 V p-p differential

input, VIN = −1.0 dBFS, 64k sample, TA = 25°C, NCO enabled, FIR filter enabled, unless otherwise noted. In the FFT plots that follow,

the location of the second and third harmonics is noted when they fall in the pass band of the filter.

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035

150MSPS

2.4MHz @ –1dBFS

SNR = 74.7dBc (75.7dBFS)

SFDR = 86.5dBc

fNCO = 18.75MHz

SECOND HARMONIC

THIRD HARMONIC

FREQUENCY (MHz)

Figure 19. AD6655-150 Single-Tone FFT with fIN = 2.4 MHz, fNCO = 18.75 MHz

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150MSPS

30.3MHz @ –1dBFS

SNR = 74.8dBc (75.8dBFS)

SFDR = 100dBc

fNCO = 24MHz

Figure 20. AD6655-150 Single-Tone FFT with fIN = 30.3 MHz, fNCO = 24 MHz

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FREQUENCY (MHz)

150MSPS

140.1MHz @ –1dBFS

SNR = 73.7dBc (74.7dBFS)

SFDR = 82.8dBc

fNCO = 126MHz

SECOND HARMONIC

THIRD HARMONIC

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FREQUENCY (MHz)

150MSPS

140.1MHz @ –1dBFS

SNR = 74.3dBc (75.3dBFS)

SFDR = 83.3dBc

fNCO = 56MHz

THIRD HARMONIC

Figure 21. AD6655-150 Single-Tone FFT with fIN = 70.1 MHz, fNCO = 56 MHz

Figure 22. AD6655-150 Single-Tone FFT with fIN = 140.1 MHz,

fNCO = 126 MHz

150MSPS

220.1MHz @ –1dBFS

SNR = 71.8dBc (72.8dBFS)

SFDR = 81.4dBc

fNCO = 205MHz

THIRD HARMONIC

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FREQUENCY (MHz)

Figure 23. AD6655-150 Single-Tone FFT with fIN = 220.1 MHz,

fNCO = 205 MHz

150MSPS

332.1MHz @ –1dBFS

SNR = 71.7dBc (72.7dBFS)

SFDR = 95.0dBc

fNCO = 321.5MHz

Figure 24. AD6655-150 Single-Tone FFT with fIN = 332.1 MHz,

fNCO = 321.5 MHz

AD6655 Datasheet(PDF) 24 Page - Analog Devices

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