AD7156 Analog Devices, AD7156 Datasheet - Page 9
AD7156
Manufacturer Part Number
AD7156
Description
Manufacturer
Analog Devices
Datasheet
1.AD7156.pdf
(28 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AD7156ASTZF16
Manufacturer:
HITACHI
Quantity:
8
Part Number:
AD7156BCPZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Figure 12. Capacitance Input Gain Error vs. Resistance EXC to GND,
Figure 10. Capacitance Input Gain Error vs. Resistance CIN to GND,
Figure 11. Capacitance Input Gain Error vs. Resistance CIN to GND,
–0.2
–0.4
–0.6
–0.8
–1.0
–10
–10
0.2
–2
–4
–6
–8
–2
–4
–6
–8
2
0
2
0
0
0.1
1
1
V
V
V
3.3V
3.3V
DD
DD
1.8V
DD
= 1.8 V and 3.3 V, CIN to EXC = 3 pF
= 1.8 V and 3.3 V, CIN to EXC = 9 pF
= 1.8 V and 3.3 V, CIN to EXC = 3 pF
RESISTANCE EXC TO GROUND (MΩ)
1
RESISTANCE CIN TO GND (MΩ)
RESISTANCE CIN TO GND (MΩ)
10
10
1.8V
1.8V
3.3V
10
100
100
100
1k
1k
1k
Rev. 0 | Page 9 of 28
Figure 13. Capacitance Input Gain Error vs. Resistance EXC to GND,
Figure 15. Capacitance Input Gain Error vs. Parallel Resistance,
–0.2
–0.4
–0.6
–0.8
–1.0
Figure 14. Capacitance Input Gain Error vs. Serial Resistance,
–10
–20
–30
–40
–50
0.2
–1
–2
–3
–4
–5
–6
–7
10
0
1
0
0
0.1
0
1
1.8V
V
V
V
3.3V
DD
DD
DD
= 1.8 V and 3.3 V, CIN to EXC = 9 pF
20
= 1.8 V and 3.3 V, CIN to EXC = 3 pF
= 1.8 V and 3.3 V, CIN to EXC = 3 pF
RESISTANCE EXC TO GROUND (MΩ)
1
3.3V
PARELLEL RESISTANCE (MΩ)
SERIAL RESISTANCE (kΩ)
10
1.8V
40
10
1.8V
60
100
100
80
3.3V
AD7156
100
1k
1k