AD872A–Dynamic Characteristics–Sample Rate: 10 MSPS
1
fIN = 750kHz
fIN AMPLITUDE = –0.5dB
THD = –74dB
S/(N+D) = 69dB
SNR = 71dB
SFDR = 75dB
2
3
HARMONICS – dB
2ND –75
3RD –88
4TH –93
5TH –87
6TH –86
7TH –90
8TH –91
9TH –94
4
9
5
8
6
7
Figure 6. AD872A Typical FFT, fIN = 750 kHz
1
fIN = 5MHz
fIN AMPLITUDE = –0.5dB
THD = –74dB
S/(N+D) = 65dB
SNR = 65dB
SFDR = 69dB
HARMONICS – dB
2ND –75
3RD –93
4TH –85
5TH –85
6TH –89
7TH –97
8TH –90
9TH –92
2
4
5
9
Figure 7. AD872A Typical FFT, fIN = 5 MHz
700000
600000
618061
500000
400000
300000
200000
100000
0
19559
15170
–1
0
+1
DEVIATION FROM CORRECT CODE – LSB
Figure 8. AD872A Output Code Histogram for DC Input
100
90
80
70
60
50
40
30
20
10
0
CODE X
0.26 LSB RMS
CODE X + 1
Figure 9. AD872A Code Probability at a Transition
–8–
REV. A