Datasheet

AD7694
Rev. A | Page 10 of 16
100
95
90
85
80
17
16
15
14
13
2.5 3.0 3.5 4.0 4.5 5.0
05003-011
REFERENCE VOLTAGE (V)
SNR, S/[N+D] (dB)
ENOB (Bits)
SNR
S/[N+D]
ENOB
Figure 11. SNR, S/(N + D), and ENOB vs. Reference Voltage
100
95
90
85
80
75
70
0 50 100 150 200
05003-012
FREQUENCY (kHz)
S/[N+D] (dB)
V
REF
= 2.5V, –1dB
V
REF
= 5V, –10dB
V
REF
= 5V, –1dB
Figure 12. S/[N + D] vs. Frequency
–80
–115
–110
–105
–100
–95
–90
–85
0 40 80 120 160 200
05003-013
FREQUENCY (kHz)
THD (dB)
V
REF
= 5V, –1dB
V
REF
= 2.5V, –1dB
Figure 13. THD vs. Frequency
1200
1000
800
600
400
200
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
05003-014
SUPPLY (V)
OPERATING CURRENT (μA)
f
S
= 100kSPS
Figure 14. Operating Current vs. Supply
800
900
400
500
600
700
300
200
100
0
–55 125105856545255–15–35
05003-015
TEMPERATURE (°C)
OPERATING CURRENT (μA)
VDD = 5V, f
S
= 100kSPS
VDD = 2.7V,
f
S
= 100kSPS
Figure 15. Operating Current vs. Temperature
1000
0
250
500
750
–55 –35 –15 5 25 45 65 85 105 125
05003-016
TEMPERATURE (°C)
POWER-DOWN CURRENT (nA)
Figure 16. Power-Down Current vs. Temperature