Datasheet

AD7685
Rev. C | Page 11 of 28
02968-011
REFERENCE VOLTAGE (V)
5.52.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1
ENOB (Bits)
13
17
16
15
14
SINAD (dB)
100
95
90
85
80
SNR
SINAD
ENOB
Figure 13. SNR, SINAD, and ENOB vs. Reference Voltage
02968-012
SINAD (dB)
FREQUENCY (kHz)
2000 50 100 150
100
95
90
85
80
75
70
V
REF
= 5V, –1dB
V
REF
= 2.5V, –1dB
V
REF
= 5V, –10dB
Figure 14. SINAD vs. Frequency
02968-013
TEMPERATURE (°C)
125–55 –35 –15 5 25 45 65 85 105
SNR (dB)
100
95
90
85
80
75
70
V
REF
= 5V
V
REF
= 2.5V
Figure 15. SNR vs. Temperature
02968-014
REFERENCE VOLTAGE (V)
5.52.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1
THD, SFDR (dB)
–
90
–95
–100
–105
–110
–115
–120
–125
–130
SFDR
THD
Figure 16. THD, SFDR vs. Reference Voltage
02968-015
FREQUENCY (kHz)
2000 50 100 150
THD (dB)
–
60
–70
–80
–90
–100
–110
–120
V
REF
= 2.5V, –1dB
V
REF
= 5V, –1dB
V
REF
= 5V, –10dB
Figure 17. THD vs. Frequency
02968-016
TEMPERATURE (°C)
125–55 –35 –15 5 25 45 65 85 105
THD (dB)
–
90
–100
–110
–120
–130
V
REF
= 2.5V
V
REF
= 5V
Figure 18. THD vs. Temperature