Datasheet

AD7687 Data Sheet
Rev. B | Page 12 of 28
02972-018
INPUT LEVEL (dB)
0–10–8–6–4–2
SNR (dB)
100
99
98
97
96
95
94
93
92
91
90
VREF = 5V
VREF = 2.5V
Figure 19. SNR vs. Input Level
SUPPLY (V)
OPERATING CURRENT (μA)
1000
750
500
250
0
2.3 3.1 3.9 4.7 5.52.7 3.5 4.3 5.1
02972-019
VIO
VDD
f
S
= 100kSPS
Figure 20. Operating Currents vs. Supply
TEMPERATURE (°C)
POWER-DOWN CURRENT (nA)
1000
750
500
250
0
–55 –35 –15 5 25 45 65 85 105 125
02972-020
VDD + VIO
Figure 21. Power-Down Currents vs. Temperature
TEMPERATURE ( ° C)
OPERATING CURRENT (
μ
A)
1000
750
500
250
0
–55 –35 –15 5 25 45 65 85 105 125
02972-021
VIO
VDD = 5V
VDD = 2.5V
f
S
= 100kSPS
Figure 22. Operating Currents vs. Temperature
02972-022
TEMPERATURE (°C)
125–55 –35 –15 5 25 45 65 85 105
OFFSET, GAIN ERROR (LSB)
6
4
2
0
–2
–4
–6
GAIN ERROR
OFFSET ERROR
Figure 23. Offset and Gain Error vs. Temperature
02972-023
SDO CAPACITIVE LOAD (pF)
1200 20406080100
T
DSDO
DELAY (ns)
25
20
15
10
5
0
VDD = 2.5V, 85°C
VDD = 3.3V, 25°C
VDD = 3.3V, 85°C
VDD = 5V, 85°C
VDD = 5V, 25°C
VDD = 2.5V, 25°C
Figure 24. t
DSDO
Delay vs. Capacitance Load and Supply