AD7143 Analog Devices, AD7143 Datasheet - Page 33

• Manufacturer Part Number: AD7143
• Description: Programmable Controller for Capacitance Touch Sensors
• Manufacturer: Analog Devices

Specifications of AD7143

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: n/a
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: n/a
• Ain Range: ± 2 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

TYPICAL APPLICATION CIRCUITS
SCROLL
WHEEL
SENSOR PCB
Figure 46. Typical Application Circuit with I
1 CIN2
2 CIN3
3 CIN4
4 CIN5
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AD7143
10nF
VDRIVE
GND
SDA
VCC
12
11
10
9
2
C Interface
0.1µF
VDRIVE
2.2kΩ
1µF TO 10µF
(OPTIONAL)
VCC
2.7V TO 3.6V
2.2kΩ
2.2kΩ
INT
SCLK
SDA
INTERFACE
HOST WITH
I
(1.65V TO 3.6V)
2
C INTERFACE
OPTIONAL
VOLTAGE
I
2
C
V
HOST
AD7143