Datasheet

AD7142
Rev. A | Page 38 of 72
TYPICAL APPLICATION CIRCUITS
05702-041
V
DRIVE
2.2kΩ
HOST
WITH
SPI
INTERFACE
SS
SCK
MOSI
MISO
INT
V
HOST
AV
CC,
DV
CC
1.8V
AV
CC,
DV
CC
2.7V TO 3.6V
0.1µF
1µF TO 10µF
(OPTIONAL)
24
23
22
21
20
19
18
17
9
10 12 11 13 14 15 16
10nF
CIN3
CIN4
CIN5
CIN6
CIN7
CIN8
CIN9
CIN10
CIN11
CIN2
AV
CC
SRC AGND
CIN12
CIN13 C
SHIELD
SRC
CS
INT
SDI
SCLK
V
DRIVE
DV
CC
DGND1
SDO
DGND2
V
REF+
TEST
GPIO
CIN0
CIN1
V
REF–
AD7142
32 31 30 29 28 2
7
26 25
1
2
3
4
5
6
7
8
RECOM
M
ENDED TO CONNECT
FLOODED PLANE AROUND
SENSORS TO GROUND
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
CIN2
CIN11
AV
CC
SRC AGND
CIN12
CIN13 C
SHIELD
SRC
ADD1
INT
ADD0
SCLK
V
DRIVE
DV
CC
DGND1
SDA
DGND2
V
REF+
TEST
GPIO
CIN0 CIN1
V
REF–
AV
CC,
DV
CC
AV
CC,
DV
CC
2.7V TO 3.6V
0.1µF
1µF TO 10µF
(OPTIONAL)
AD7142-1
V
DRIVE
V
DRIVE
2.2kΩ
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
9
10 11 12 13 14 15 16
32 31 30 29 28 27 26 25
10nF
HOST
WITH
I
2
C
INTERFACE
V
DRIVE
2.2kΩ
RECOMMENDED TO CONNECT
FLOODED PLANE AROUND
SENSORS TO GROUND
BUTTON
BUTTON
BUTTON
SLIDER
05702-042
Figure 58. Typical Application Circuit with I
2
C Interface