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AD7142ACPZ-1500RL71 Datenblatt(PDF) 10 Page - Analog Devices

Teilenummer AD7142ACPZ-1500RL71
Bauteilbeschribung  Programmable Controller for Capacitance Touch Sensors
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Direct Link  http://www.analog.com
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AD7142
Rev. A | Page 9 of 72
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
PIN 1
INDICATOR
1
CIN3
2
CIN4
3
CIN5
4
CIN6
5
CIN7
6
CIN8
7
CIN9
8
CIN10
24 CS
23 SCLK
22 SDI
21 SDO
20 VDRIVE
19 DGND2
18 DGND1
17 DVCC
TOP VIEW
AD7142
Figure 6. AD7142 Pin Configuration
PIN 1
INDICATOR
1
CIN3
2
CIN4
3
CIN5
4
CIN6
5
CIN7
6
CIN8
7
CIN9
8
CIN10
24 ADD1
23 SCLK
22 ADD0
21 SDA
20 VDRIVE
19 DGND2
18 DGND1
17 DVCC
TOP VIEW
(Not to Scale)
AD7142-1
Figure 7. AD7142-1 Pin Configuration
Table 7. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
CIN3
Capacitance Sensor Input.
2
CIN4
Capacitance Sensor Input.
3
CIN5
Capacitance Sensor Input.
4
CIN6
Capacitance Sensor Input.
5
CIN7
Capacitance Sensor Input.
6
CIN8
Capacitance Sensor Input.
7
CIN9
Capacitance Sensor Input.
8
CIN10
Capacitance Sensor Input.
9
CIN11
Capacitance Sensor Input.
10
CIN12
Capacitance Sensor Input.
11
CIN13
Capacitance Sensor Input.
12
CSHIELD
CDC Shield Potential Output. Requires 10 nF capacitor to ground. Connect to external shield.
13
AVCC
CDC Supply Voltage.
14
AGND
Analog Ground Reference Point for All CDC Circuitry. Tie to analog ground plane.
15
SRC
CDC Excitation Source Output.
16
SRC
Inverted Excitation Source Output.
17
DVCC
Digital Core Supply Voltage.
18
DGND1
Digital Ground.
19
DGND2
Digital Ground.
20
VDRIVE
Serial Interface Operating Voltage Supply.
21
SDO
(AD7142) SPI Serial Data Output.
SDA
(AD7142-1) I2C Serial Data Input/Output. SDA requires pull-up resistor.
22
SDI
(AD7142) SPI Serial Data Input.
ADD0
(AD7142-1) I2C Address Bit 0.
23
SCLK
Clock Input for Serial Interface.
24
CS
(AD7142) SPI Chip Select Signal.
ADD1
(AD7142-1) I2C Address Bit 1.
25
INT
General-Purpose Open-Drain Interrupt Output. Programmable polarity; requires pull-up resistor.
26
GPIO
Programmable GPIO.
27
TEST
Factory Test Pin. Tie to ground.
28
VREF+
CDC Positive Reference Input. Normally tied to analog power.
29
VREF−
CDC Negative Reference Input. Tie to analog ground.
30
CIN0
Capacitance Sensor Input.
31
CIN1
Capacitance Sensor Input.
32
CIN2
Capacitance Sensor Input.


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