AD9268
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = 1.8 V, DRVDD = 1.8 V, rated sample rate, DCS enabled, 1.0 V internal reference, 2 V p-p differential input, VIN = −1.0 dBFS, and
32k sample, TA = 25°C, unless otherwise noted.
0
–20
–40
–60
0
–20
–40
–60
80MSPS
80MSPS
200.3MHz @ –1dBFS
SNR = 74.3dB (75.3dBFS)
SFDR = 83dBc
2.4MHz @ –1dBFS
SNR = 79.0dB (80.0dBFS)
SFDR = 98dBc
SECOND HARMONIC
SECOND HARMONIC
THIRD HARMONIC
–80
–80
–100
–120
THIRD HARMONIC
–100
–120
–140
–140
20
FREQUENCY (MHz)
0
10
20
FREQUENCY (MHz)
30
40
0
10
30
40
Figure 8. AD9268-80 Single-Tone FFT with fIN = 2.4 MHz
Figure 11. AD9268-80 Single-Tone FFT with fIN = 200.1 MHz
0
0
80MSPS
70.1MHz @ –6dBFS
SNR = 73.0dB (79.0dBFS)
SFDR = 98dBc
80MSPS
70.1MHz @ –1dBFS
SNR = 77.5dB (78.5dBFS)
SFDR = 89.2dBc
–20
–40
–60
–20
–40
–60
THIRD HARMONIC
THIRD HARMONIC
–80
–100
–120
–80
–100
–120
SECOND HARMONIC
SECOND HARMONIC
–140
–140
0
10
20
30
40
0
10
20
30
40
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 9. AD9268-80 Single-Tone FFT with fIN = 70.1 MHz
Figure 12. AD9268-80 Single-Tone FFT with fIN = 70.1 MHz with Dither
Enabled
0
120
100
80
80MSPS
140.1MHz @ –1dBFS
SNR = 76.0dB (77.0dBFS)
SFDR = 81.1dBc
–20
–40
–60
THIRD HARMONIC
60
SECOND HARMONIC
–80
–100
–120
40
SNR (dBFS)
SFDR (dBc)
20
SNR (dBc)
SFDR (dBFS)
–140
0
0
10
20
FREQUENCY (MHz)
30
40
–100 –90 –80 –70 –60 –50 –40 –30 –20 –10
0
INPUT AMPLITUDE (dBFS)
Figure 10. AD9268-80 Single-Tone FFT with fIN = 140.1 MHz
Figure 13. AD9268-80 Single-Tone SNR/SFDR vs. Input Amplitude (AIN
)
with fIN = 98.12 MHz
Rev. A | Page 1ꢁ of 44
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