Datasheet

AD9248
Rev. B | Page 12 of 48
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD, DRVDD = 3.0 V, T = 25°C, A
IN
differential drive, full scale = 2 V, unless otherwise noted.
–120
10
MAGNITUDE (dBFS)
15 20 25 3050
–100
–80
–60
–40
–20
0
FREQUENCY (MHz)
04446-060
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 f
IN
= 12.5 MHz
While Channel B Is Digitizing f
IN
= 10 MHz
–120
10
MAGNITUDE (dBFS)
15 20 25 3050
–100
–80
–60
–40
–20
0
FREQUENCY (MHz)
04446-061
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 f
IN
= 70 MHz
While Channel B Is Digitizing f
IN
= 76 MHz
–120
10
MAGNITUDE (dBFS)
15 20 25 3050
–100
–80
–60
–40
–20
0
FREQUENCY (MHz)
04446-062
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 f
IN
= 120 MHz
While Channel B Is Digitizing f
IN
= 126 MHz
ADC SAMPLE RATE (MSPS)
90
55
40
SFDR/SNR (dBc)
85
80
75
70
65
60
45 50 55 60 65
95
100
50
04446-007
SNR
SFDR
Figure 8. AD9248-65 Single-Tone SFDR/SNR vs. FS with f
IN
= 32.5 MHz
SNR
SFDR
SNR
ADC SAMPLE RATE (MSPS)
90
55
40
SFDR/SNR (dBc)
85
80
75
70
65
60
95
100
50
35302520
04446-008
Figure 9. AD9248-40 Single-Tone SFDR/SNR vs. FS with f
IN
= 20 MHz
SFDR
SNR
ADC SAMPLE RATE (MSPS)
90
55
SFDR/SNR (dBc)
85
80
75
70
65
60
95
100
50
0 5 10 15 20
04446-009
Figure 10. AD9248-20 Single-Tone SFDR/SNR vs. FS with f
IN
= 10 MHz