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AD7142 Datasheet(PDF) 39 Page - Analog Devices

Part # AD7142
Description  Programmable Controller for Capacitance Touch Sensors
PDF  70 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7142 Datasheet(HTML) 39 Page - Analog Devices

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Data Sheet
AD7142
Rev. B | Page 39 of 70
TYPICAL APPLICATION CIRCUITS
VDRIVE
2.2kΩ
HOST
WITH
SPI
INTERFACE
SS
SCK
MOSI
MISO
INT
VHOST
AVCC, DVCC
1.8V
AVCC, DVCC 2.7V TO 3.6V
0.1µF
1µF TO 10µF
(OPTIONAL)
24
23
22
21
20
19
18
17
10nF
CIN3
CIN4
CIN5
CIN6
CIN7
CIN8
CIN9
CIN10
CS
SDI
SCLK
VDRIVE
DVCC
DGND1
SDO
DGND2
AD7142
1
2
3
4
5
6
7
8
SENSOR PCB
SCROLL WHEEL
BUTTON
BUTTON
BUTTON
BUTTON
Figure 57. Typical Application Circuit with SPI Interface
2.2kΩ
SCK
SDO
INT
CIN3
CIN4
CIN5
CIN6
CIN7
CIN8
CIN9
CIN10
ADD1
ADD0
SCLK
VDRIVE
DVCC
DGND1
SDA
DGND2
AVCC, DVCC
AVCC, DVCC 2.7V TO 3.6V
0.1µF
1µF TO 10µF
(OPTIONAL)
AD7142-1
VDRIVE
VDRIVE
2.2kΩ
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
10nF
HOST
WITH
I2C
INTERFACE
VDRIVE
2.2kΩ
BUTTON
BUTTON
BUTTON
SLIDER
Figure 58. Typical Application Circuit with I2C Interface



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