Datasheet

AD9238
Rev. C | Page 11 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 15 20 25 30
50
–100
–80
–60
–40
–20
0
SECOND
HARMONIC
FREQUENCY (MHz)
CROSSTALK
MAGNITUDE (dBFS)
THIRD
HARMONIC
02640-004
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
dB
15 20 25 3050
–100
–80
–60
–40
–20
0
FREQUENCY (MHz)
CROSSTALK
SECOND
HARMONIC
02640-005
Figure 6. Single-Tone FFT of Channel A Digitizing f
IN
= 70 MHz
While Channel B Is Digitizing f
IN
= 76 MHz
–120
10
dB
15 20 25 3050
–100
–80
–60
–40
–20
0
SECOND
HARMONIC
FREQUENCY (MHz)
CROSSTALK
02640-006
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
SNR
SFDR
50
02640-007
Figure 8. AD9238-65 Single-Tone SNR/SFDR vs. FS with f
IN
= 32.5 MHz
ADC SAMPLE RATE (MSPS)
90
55
40
SFDR/SNR (dBc)
85
80
75
70
65
60
95
100
SNR
SFDR
50
35302520
SNR
SNR
02640-008
Figure 9. AD9238-40 Single-Tone SNR/SFDR vs. FS with f
IN
= 20 MHz
ADC SAMPLE RATE (MSPS)
90
55
SFDR/SNR (dBc)
85
80
75
70
65
60
95
100
50
0
5101520
SFDR
SNR
02640-009
Figure 10. AD9238-20 Single-Tone SNR/SFDR vs. FS with f
IN
= 10 MHz