Datasheet

AD7699 Data Sheet
Rev. | Page 10 of 28
94
92
90
88
86
17
16
15
14
13
4.0 4.5 5.0 5.5
REFERENCE VOLTAGE (V)
SNR, SINAD (dB)
ENOB (Bits)
07354-016
f
IN
= 20kHz
SNR
SINAD
ENOB
Figure 17. SNR, SINAD, ENOB vs. Reference Voltage
95
94
93
92
91
90
89
88
87
86
85
15.6
15.5
15.4
15.3
15.2
15.1
15.0
14.9
14.8
14.7
14.6
–10–8–6–4–2 0
INPUT LEVEL (dB)
SNR (dB)
ENOB (Bits)
07354-018
f
IN
= 20kHz
V
REF
= 5V
SNR
SINAD
ENOB
Figure 18. SNR, SINAD, and ENOB vs. Input Level
3
2
1
0
–1
–2
–3
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
ZERO ERROR, GAIN ERROR (LSB)
07354-020
UNIPOLAR OFFSET
UNIPOLAR GAIN
BIPOLAR GAIN
BIPOLAR OFFSET
Figure 19. Offset and Gain Errors vs. Temperature, Not Normalized
–
80
–85
–90
–95
–100
–105
–110
110
105
100
95
85
90
80
4.0 4.5 5.0 5.5
REFERENCE VOLTAGE (V)
THD (dB)
SFDR (dB)
07354-019
SFDR
THD
Figure 20. THD, SFDR vs. Reference Voltage
5500
5250
5000
4750
4500
180
140
100
60
160
120
80
40
20
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
V
DD
CURRENT (µA)
VIO CURRENT (µA)
07354-022
VIO
f
s
= 500kSPS
V
DD
, INT REF
V
DD
, EXT REF
Figure 21. Operating Currents vs. Temperature
5750
5500
5250
5000
4750
4500
4250
4000
3750
100
90
80
70
60
50
40
30
20
4.5 5.0 5.5
VDD SUPPLY (V)
VDD CURRENT (µA)
VIO CURRENT (µA)
f
S
= 500kSPS
0
7354-040
VIO
EXTERNAL REF, TEMP ON
4.096V INTERNAL REF
EXTERNAL REF, TEMP OFF
INTERNAL BUFFER, TEMP OFF
INTERNAL BUFFER, TEMP ON
Figure 22. Operating Currents vs. Supply
B