Datasheet

AD7688
Rev. A | Page 10 of 28
02973-012
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
02973-013
TEMPERATURE (°C)
125–55 –35 –15 5 25 45 65 85 105
SNR (dB)
100
95
90
85
80
VREF = 5V
Figure 14. SNR vs. Temperature
02973-014
FREQUENCY (kHz)
2000 50 100 150
S/(N + D) (dB)
100
95
85
90
80
75
70
VREF = 5V, –10dB
VREF = 5V, –1dB
Figure 15. S/(N + D) vs. Frequency
02973-015
REFERENCE VOLTAGE (V)
5.52.3 2.7 3.5 4.3 5.13.1 3.9 4.7
THD, SFDR (dB)
–100
–110
–105
–115
–120
–125
–130
SFDR
THD
Figure 16. THD, SFDR vs. Reference Voltage
02973-016
TEMPERATURE (°C)
125–55 –35 –15 5 25 45 65 85 105
THD (dB)
–90
–100
–110
–120
–130
VREF = 5V
Figure 17. THD vs. Temperature
02973-017
FREQUENCY (kHz)
2000 50 100 150
THD (dB)
–60
–70
–90
–80
–100
–110
–120
VREF = 5V, –10dB
VREF = 5V, –1dB
Figure 18. THD vs. Frequency