AD6640–Typical Performance Characteristics
0
POWER RELATIVE TO ADC FULL SCALE – dB
ENCODE = 65MSPS
AIN = 2.2MHz
81
ENCODE = 65MSPS
TEMP = –40 C, +25 C, & +85 C
WORST CASE HARMONIC – dBc
20
80
T = +25 C
79
T = –40 C, +85 C
78
40
60
2
3
4
5 6
7
8
9
80
100
77
120
dc
6.5
13.0
19.5
FREQUENCY – MHz
26.0
32.5
0
7
14
21
28
35
42
49
56
ANALOG INPUT FREQUENCY – MHz
63
70
Figure 7. Single Tone at 2.2 MHz
Figure 10. Harmonics vs. AIN
POWER RELATIVE TO ADC FULL SCALE – dB
0
ENCODE = 65MSPS
AIN = 15.5MHz
20
69
ENCODE = 65MSPS
TEMP = –40 C, +25 C, & +85 C
40
SNR – dB
68
T = +25 C
67
T = –40 C
60
4
80
8
9
5
3
7
6
2
T = +85 C
66
100
65
120
dc
6.5
13.0
19.5
FREQUENCY – MHz
26.0
32.5
0
7
14
21
28
35
42
49
56
ANALOG INPUT FREQUENCY – MHz
63
70
Figure 8. Single Tone at 15.5 MHz
Figure 11. Noise vs. AIN
0
POWER RELATIVE TO ADC FULL SCALE – dB
90
ENCODE = 65MSPS
AIN = 31.0MHz
20
SNR, HARMONICS – dB, dBc
WORST OTHER SPUR
80
ENCODE = 65MSPS
HARMONICS (2nd, 3rd)
40
70
SNR
60
60
2
4
6
8
9
7
5
3
80
50
100
40
120
dc
6.5
13.0
19.5
FREQUENCY – MHz
26.0
32.5
30
1
2
10
100
4
20
40
ANALOG INPUT FREQUENCY – MHz
200 300
Figure 9. Single Tone at 31.0 MHz
Figure 12. Harmonics, Noise vs. AIN
–8–
REV. 0
AD [ ANALOG DEVICES ]
