AD7691 Analog Devices, AD7691 Datasheet - Page 11

• Manufacturer Part Number: AD7691
• Manufacturer: Analog Devices

Specifications of AD7691

• Resolution (bits): 18bit
• # Chan: 1
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

105
102
99
96
93
90
87
84
81
–10
1000
1000
750
500
250
750
500
250
0
0
–55
2.3
f
S
Figure 20. Operating Current vs. Temperature
=100kSPS
2.6
–35
Figure 21. Operating Current vs. Supply
–8
Figure 19. SNR, THD vs. Input Level
THD 2.5V
2.9
–15
3.2
THD 5V
INPUT LEVEL (dB)
–6
5
TEMPERATURE (°C)
3.5
SUPPLY (V)
VDD = 5V
VDD = 2.5V
25
VDD
VIO
VIO
3.8
–4
45
SNR 5V
SNR 2.5V
4.1
65
4.4
–2
85
f
4.7
S
=100kSPS
105
5.0
0
–90
–95
–100
–105
–110
–115
–120
–125
–130
125
5.3
Rev. B | Page 11 of 28
1000
750
500
250
–2
–4
–6
25
20
15
10
6
4
2
0
–55
0
5
0
–55
Figure 24. t
0
Figure 22. Zero Error, Gain Error vs. Temperature
Figure 23. Power-Down Current vs. Temperature
–35
–35
20
DSDO
–15
–15
Delay vs. Capacitance Load and Supply
SDO CAPACITIVE LOAD (pF)
40
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
60
45
45
VDD = 5V, 25°C
VDD + VIO
GAIN ERROR
65
65
80
OFFSET ERROR
VDD = 5V, 85°C
85
85
100
105
105
AD7691
125
120
125