Datasheet

Data Sheet AD7687
Rev. B | Page 11 of 28
02972-012
REFERENCE VOLTAGE (V)
5.52.3 2.7 3.5 4.3 5.13.1 3.9 4.7
SNR, S/(N + D) (dB)
100
95
85
90
70
SNR
ENOB
ENOB (Bits)
17.0
15.0
16.0
14.0
13.0
S/[N + D]
Figure 13. SNR, S/(N + D), and ENOB vs. Reference Voltage
02972-013
FREQUENCY (kHz)
2000 50 100 150
S/(N + D) (dB)
100
95
85
90
80
75
70
VREF = 5V, –10dB
VREF = 2.5V, –10dB
VREF = 2.5V, –1dB
VREF = 5V, –1dB
Figure 14. S/(N + D) vs. Frequency
02972-014
TEMPERATURE (°C)
125–55 –35 –15 5 25 45 65 85 105
SNR (dB)
100
95
90
85
80
VREF = 5V
VREF = 2.5V
Figure 15. SNR vs. Temperature
02972-015
REFERENCE VOLTAGE (V)
5.52.3 2.7 3.5 4.3 5.13.1 3.9 4.7
THD, SFDR (dB)
–100
–105
–110
–115
–120
–125
–130
THD
SFDR
Figure 16. THD, SFDR vs. Reference Voltage
02972-016
FREQUENCY (kHz)
2000 50 100 150
THD (dB)
–60
–70
–90
–80
–100
–110
–120
VREF = 5V, –10dB
VREF = 2.5V, –10dB
VREF = 5V, –1dB
VREF = 2.5V, –1dB
Figure 17. THD vs. Frequency
02972-017
TEMPERATURE ( ° C)
125–55 –35 –15 5 25 45 65 85 105
THD (dB)
–90
–100
–110
–120
–130
VREF = 5V
VREF = 2.5V
Figure 18. THD vs. Temperature