Datasheet

AD7622
Rev. 0 | Page 13 of 28
0
–140
–120
–100
–80
–60
–40
–20
–160
–180
0 100 200 300 400 500 600 700 800 900 1000
06023-011
AMPLITUDE (dB of Full Scale)
FREQUENCY (kHz)
f
S
= 2MSPS
f
IN
= 20.1kHz
SNR = 92dB
THD = –117dB
SFDR = 103dB
SINAD = 92dB
Figure 12. FFT 20 kHz
95
79
81
83
85
87
89
91
93
77
75
16.0
12.8
13.2
13.6
14.0
14.4
14.8
15.2
15.6
12.4
12.0
1 10 100 1000
06023-012
SNR, SINAD (dB)
ENOB (Bits)
FREQUENCY (kHz)
SNR
ENOB
SINAD
Figure 13. SNR, SINAD, and ENOB vs. Frequency
–
70
–80
–90
–100
–110
–120
–130
–140
120
40
50
60
70
80
90
100
110
30
20
1 10 100 1000
06023-013
THD, HARMONICS (dB)
SFDR (dB)
FREQUENCY (kHz)
SECOND HARMONIC
THIRD HARMONIC
THD
SFDR
Figure 14. THD, Harmonics, and SFDR vs. Frequency
0
–140
–120
–100
–80
–60
–40
–20
–160
–180
0 100 200 300 400 500 600 700 800 900 1000
06023-014
AMPLITUDE (dB of Full Scale)
FREQUENCY (kHz)
f
S
= 2MSPS
f
IN
=100.7kHz
SNR = 91dB
THD = –100dB
SFDR = 101dB
SINAD = 90.5dB
Figure 15. FFT 100 kHz
06023-015
SNR, SINAD (dB)
ENOB (Bits)
TEMPERATURE (°C)
–55 –35 –15 5 25 45 65 85 105 125
14.0
14.5
15.0
15.5
16.0
86
87
90
89
88
91
92
93
94
SNR
ENOB
SINAD
Figure 16. SNR, SINAD, and ENOB vs. Temperature
06023-016
THD, HARMONICS (dB)
SFDR (dB)
TEMPERATURE (°C)
–55 –35 –15 5 25 45 65 85 105 125
SFDR
THD
SECOND
HARMONIC
THIRD
HARMONIC
60
70
80
90
100
110
120
–140
–130
–120
–110
–100
–90
–
80
Figure 17. THD, Harmonics, and SFDR vs. Temperature