Datasheet

AD9258
Rev. A | Page 17 of 44
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, T
A
= 25°C, unless otherwise noted
0
–20
–40
–60
–80
–100
–120
–140
0102030
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08124-062
SECOND HARMONIC
THIRD HARMONIC
40
80MSPS
2.4MHz @ –1dBFS
SNR = 78.2dB (79.2dBFS)
SFDR = 99dBc
Figure 8. AD9258-80 Single-Tone FFT with f
IN
= 2.4 MHz
0
–20
–40
–60
–80
–100
–120
–140
0102030
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08124-063
40
SECOND HARMONIC
THIRD HARMONIC
80MSPS
70.1MHz @ –1dBFS
SNR = 77.0dB (78.0dBFS)
SFDR = 89.0dBc
Figure 9. AD9258-80 Single-Tone FFT with f
IN
= 70.1 MHz
0
–20
–40
–60
–80
–100
–120
–140
0102030
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08124-064
40
80MSPS
140.1MHz @ –1dBFS
SNR = 75.5dB (76.5dBFS)
SFDR = 82.0dBc
SECOND HARMONIC
THIRD HARMONIC
Figure 10. AD9258-80 Single-Tone FFT with f
IN
= 140.1 MHz
0
–20
–40
–60
–80
–100
–120
–140
010
20
30 40
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08124-065
SECOND HARMONIC
80MSPS
200.3MHz @ –1dBFS
SNR = 74.3dB (75.3dBFS)
SFDR = 83dBc
THIRD HARMONIC
Figure 11. AD9258-80 Single-Tone FFT with f
IN
= 200.1 MHz
0
–20
–40
–60
–80
–100
–120
–140
0102030
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08124-066
40
SECOND HARMONIC
THIRD HARMONIC
80MSPS
70.1MHz @ –6dBFS
SNR = 71.6dB (77.6dBFS)
SFDR = 97dBc
Figure 12. AD9258-80 Single-Tone FFT with f
IN
= 70.1 MHz with Dither
Enabled
120
100
80
60
40
20
0
–100 –90 –80 –70 –60 –50 –40 –30 –20 –10 0
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBc AND dBFS)
08124-067
SNR (dBFS)
SFDR (dBc)
SNR (dBc)
SFDR (dBFS)
Figure 13. AD9258-80 Single-Tone SNR/SFDR vs. Input Amplitude (A
IN
)
with f
IN
= 98.12 MHz