Datasheet

AD7623
Rev. 0 | Page 13 of 28
0
–180
0 600
05574-011
FREQUENCY (kHz)
AMPLITUDE (dB of Full Scale)
–20
–40
–60
–80
–100
–120
–140
–160
f
S
= 1.33MSPS
f
IN
= 20.03kHz
SNR = 89.4dB
THD = –104.1dB
SFDR = 107.2dB
SINAD = 89.3dB
500100 200 300 400
Figure 11. FFT 20 kHz
92
82
1 1000
05574-012
FREQUENCY (kHz)
SNR, SINAD (dB)
13.4
13.8
14.2
14.6
15.0
15.4
ENOB (Bits)
SNR
SINAD
ENOB
90
88
86
84
10 100
Figure 12. SNR, SINAD and ENOB vs. Frequency
–70
–120
1 1000
05574-013
FREQUENCY (kHz)
THD, HARMONICS (dB)
20
30
40
50
60
70
80
90
100
110
120
SFDR (dB)
–75
–80
–85
–90
–95
–100
–105
–110
–115
10 100
SECOND
HARMONIC
THIRD
HARMONIC
THD
SFDR
Figure 13. THD, Harmonics, and SFDR vs. Frequency
0
–180
0 600
05574-014
FREQUENCY (kHz)
AMPLITUDE (dB of Full Scale)
–20
–40
–60
–80
–100
–120
–140
–160
f
S
= 1.33MSPS
f
IN
= 100.13kHz
SNR = 89.2dB
THD = –95.6dB
SFDR = 96dB
SINAD = 88.4dB
500100 200 300 400
Figure 14. FFT 100 kHz
90
82
–55 125
05574-015
TEMPERATURE (°C)
SNR, SINAD (dB)
13.5
14.0
14.5
15.0
15.5
ENOB (Bits)
89
88
87
86
85
84
83
–35 –15 5 25 45 65 85 105
ENOB
SINAD
SNR
Figure 15. SNR, SINAD, and ENOB vs. Temperature
–80
–130
–55 125
05574-016
TEMPERATURE (°C)
THD, HARMONICS (dB)
–85
–90
–95
–100
–105
–110
–115
–120
–125
–35–155 25456585105
50
55
60
65
70
75
80
85
90
95
100
SFDR (dB)
SECOND
HARMONIC
THIRD
HARMONIC
THD
SFDR
Figure 16. THD, Harmonics, and SFDR vs. Temperature