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AD7142ACPZ-1500RL7 Datenblatt(PDF) 9 Page - Analog Devices

Teilenummer AD7142ACPZ-1500RL7
Bauteilbeschribung  Programmable Controller for Capacitance Touch Sensors
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
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AD7142ACPZ-1500RL7 Datenblatt(HTML) 9 Page - Analog Devices

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Data Sheet
AD7142
Rev. B | Page 9 of 70
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
CIN3
CIN4
CIN5
CIN6
CIN7
CIN8
CIN9
CIN10
CS
SCLK
SDI
SDO
VDRIVE
DGND2
DGND1
DVCC
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
AD7142
TOP VIEW
(Not to Scale)
NOTES
1. THE EXPOSED PAD IS NOT CONNECTED INTERNALLY.
FOR INCREASED RELIABILITY OF THE SOLDER
JOINTS AND MAXIMUM THERMAL CAPABILITY IT IS
RECOMMENDED THAT THE PAD BE SOLDERED TO
THE GROUND PLANE.
Figure 6. AD7142 Pin Configuration
CIN3
CIN4
CIN5
CIN6
CIN7
CIN8
CIN9
CIN10
ADD1
SCLK
ADD0
SDA
VDRIVE
DGND2
DGND1
DVCC
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
AD7142-1
TOP VIEW
(Not to Scale)
NOTES
1. THE EXPOSED PAD IS NOT CONNECTED INTERNALLY.
FOR INCREASED RELIABILITY OF THE SOLDER
JOINTS AND MAXIMUM THERMAL CAPABILITY IT IS
RECOMMENDED THAT THE PAD BE SOLDERED TO
THE GROUND PLANE.
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.
EPAD
Exposed Pad. The exposed pad is not connected internally. For increased reliability of the solder joints and maximum
thermal capability, it is recommended that the pad be soldered to the ground plane.


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