Datasheet

AD7942
Rev. B | Page 10 of 24
SNR
SINAD
ENOB
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
REFERENCE VOLTAGE (V)
15.0
14.5
14.0
13.5
13.0
ENOB (Bits)
86
85
84
83
82
SNR, SINAD (dB)
04657-011
Figure 11. SNR, SINAD, and ENOB vs. Reference Voltage
90
85
80
75
70
SINAD (dB)
0 50 100 150 200
FREQUENCY (kHz)
V
REF
= 2.5V, –1dB
V
REF
= 5V, –1dB
V
REF
= 5V, –10dB
04657-012
Figure 12. SINAD vs. Frequency
SNR (dB)
75
80
85
90
95
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
04657-013
V
REF
= 5V
V
REF
= 2.5V
Figure 13. SNR vs. Temperature
–80
–85
–90
–95
–100
–105
–110
–115
0 40 80 120 160 200
FREQUENCY (kHz)
THD (dB)
V
REF
= 2.5V, –1dB
V
REF
= 5V, –1dB
04657-014
Figure 14. THD vs. Frequency
THD (dB)
–120
–110
–100
–90
–55 –35
–15 5 25 45 65 85 105 125
TEMPERATURE (°C)
04657-015
V
REF
= 5V
V
REF
= 2.5V
Figure 15. THD vs. Temperature
VDD
VIO
f
S
= 100kSPS
1000
750
500
250
0
OPERATING CURRENTS (μA)
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY (V)
04657-016
Figure 16. Operating Currents vs. Supply