Datasheet

AD7946
Rev. A | Page 9 of 24
REFERENCE VOLTAGE (V)
SNR, SINAD (dB)
90.0
87.5
85.0
82.5
80.0
04656-012
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
13.0
13.5
14.0
14.5
15.0
ENOB (Bits)
SNR
SINAD
ENOB
Figure 12. SNR, SINAD, and ENOB vs. Reference Voltage
TEMPERATURE (°C)
SNR (dB)
04656-013
80.0
82.5
85.0
87.5
90.0
–55 –35 –15 5 25 45 65 85 105 125
REF = 5V
Figure 13. SNR vs. Temperature
FREQUENCY (kHz)
SINAD (dB)
04656-014
70
75
80
85
90
95
100
0 50 100 150 200
REF = 5V, –10dB
REF = 5V, –1dB
Figure 14. SINAD vs. Frequency
SFDR
THD
REFERENCE VOLTAGE (V)
THD, SFDR (dB)
04656-015
–120
–115
–110
–105
–100
–95
–90
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Figure 15. THD, SFDR vs. Reference Voltage
TEMPERATURE (°C)
THD (dB)
04656-016
–130
–120
–110
–100
–
90
–55 –35 –15 5 25 45 65 85 105 125
REF = 5V
Figure 16. THD vs. Temperature
FREQUENCY (kHz)
THD (dB)
04656-017
–120
–110
–100
–90
–80
–70
–
60
0 50 100 150 200
REF = 5V, –1dB
REF = 5V, –10dB
Figure 17. THD vs. Frequency