AD7156 Analog Devices, AD7156 Datasheet - Page 10

• Manufacturer Part Number: AD7156
• Manufacturer: Analog Devices

Specifications of AD7156

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 100SPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: Capacitive
• Ain Range: 0.5 pF,1 pF,2 pF,4 pF
• Pkg Type: CSP

AD7156
–0.05
–0.15
–0.25
–0.35
16.50
16.25
16.00
15.75
15.50
15.25
15.00
14.75
14.50
0.35
0.25
0.15
0.05
–1
–2
–3
–4
–5
Figure 16. Capacitance Input Offset Error vs. Temperature,
Figure 17. Capacitance Input Gain Error vs. Temperature,
5
4
3
2
1
0
–50
–50
–50
V
DD
Figure 18. EXC Frequency Error vs. Temperature,
= 1.8 V and 3.3 V, CIN and EXC Pins Open Circuit
1.8V
2V
–25
–25
V
V
DD
DD
2.7V
= 1.8 V, 2 V, 2.7 V, and 3.6 V
= 2.7 V, CIN to EXC = 4 pF
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
TEMPERATURE (°C)
25
3.6V
25
3.3V
50
50
50
75
1.8V
75
100
100
100
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28
Figure 19. CAPDAC Differential Nonlinearity (DNL), V
–10
–20
80
70
60
50
40
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
20
10
0
–50
0
–50
0
Figure 21. Power-Down Current vs. Temperature,
1.8V
–25
5
–25
Figure 20. Current vs. Temperature,
V
V
DD
DD
= 1.8 V, 2 V, 2.7 V, and 3.6 V
= 1.8 V, 2 V, 2.7 V, and 3.6 V
10
TEMPERATURE (°C)
0
TEMPERATURE (°C)
0
CAPDAC CODE
3.6V
2.7V
2V
15
2.7V
3.6V
2V
25
25
20
50
50
25
DD
75
1.8V
75
= 1.8 V
30