Datasheet

Data Sheet AD7634
Rev. B | Page 13 of 32
0
–180
AMPLITUDE (dB OF FULL SCALE)
0
FREQUENCY (kHz)
200 250 30050 100 150
–20
–40
–60
–80
–100
–120
–140
–160
f
S
= 670kSPS
f
IN
= 20.1kHz
SNR = 98.3dB
THD = –116.8dB
SFDR = 121dB
SINAD = 97.8dB
06406-011
Figure 11. FFT 20 kHz, Bipolar 5 V Range, Internal Reference
ENOB (Bits)
80
82
84
86
88
90
92
94
96
98
100
1 10 100 1000
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
SNR
SINAD
ENOB
06406-012
FREQUENCY (kHz)
SNR, SINAD (dB)
Figure 12. SNR, SINAD, and ENOB vs. Frequency, Unipolar 5 V Range
97
98
99
100
101
102
103
–55 –35 –15 5 25 45 65 85 105 125
06406-013
TEMPERATURE (°C)
SNR (dB)
0V TO 10V
±10V
0V TO 5V
±5V
Figure 13. SNR vs. Temperature
±10V
±5V
0V TO 10V
0V TO 5V
–60 –50 –40 –30 –20 –10 0
SNR
SINAD
INPUT LEVEL (dB)
SNR, SINAD REFERRED TO FULL SCALE (dB)
06406-014
100.0
100.5
101.0
101.5
102.0
102.5
103.0
Figure 14. SNR and SINAD vs. Input Level (Referred to Full Scale)
SFDR (dB)
1 10 100 1000
06406-015
FREQUENCY (kHz)
THD, HARMONICS (dB)
0
20
40
60
80
100
120
140
SFDR
THD
SECOND
HARMONIC
THIRD
HARMONIC
–140
–130
–120
–110
–100
–90
–80
–
70
Figure 15. THD, Harmonics, and SFDR vs. Frequency, Unipolar 5 V Range
0V TO 10V
±10V
97
98
99
100
101
102
103
–55 –35 –15 5 25 45 65 85 105 125
06406-016
TEMPERATURE (°C)
SINAD (dB)
0V TO 5V
±5V
Figure 16. SINAD vs. Temperature