Datasheet

AD7988-1/AD7988-5 Data Sheet
Rev. D | Page 12 of 24
9
5
85
8
7
8
9
9
2
91
9
3
9
4
86
88
9
0
I
NP
U
T L
E
VEL
(dB
O
F F
UL
L
SC
AL
E
)
SNR (dB
)
–10 –9
–8
–7 –6 –5 –4 –3 –2
–1 0
10231-018
Figure 18. SNR vs. Input Level
–95
–125
–110
–115
–105
–100
–120
115
85
100
95
105
110
90
REFERENCE VOLTAGE (V)
THD (dB)
S
FDR
(d
B
)
THD
SFDR
2.25
2.75 3.25 3.75 4.25 4.75
5.25
10231-019
Figure 19. THD, SFDR vs. Reference Voltage
100
80
10 1k
FREQUENCY (kHz)
SINAD (dB)
95
90
85
100
10231-052
Figure 20. SINAD vs. Frequency
10231-053
95
85
89
87
91
93
–55
125
TEMPERATURE (°C)
SNR (dB)
–35
–15
5
25 65
85
45 105
Figure 21. SNR vs. Temperature
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
VDD VOLTAGE (V)
I
VDD
I
REF
I
VIO
CURRENT (mA)
2.375 2.425 2.475 2.525
2.575 2.625
10231-023
Figure 22. Operating Currents vs. Supply (AD7988-5)
0
.14
0.
12
0.
10
0.08
0.06
0.04
0.
02
0
VDD VOLT
AGE (V)
I
VDD
I
REF
I
VIO
CURRENT (mA)
2.375 2.425 2.475 2.525 2.575 2.625
10231-024
Figure 23. Operating Currents vs. Supply (AD7988-1)