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AD7142 Arkusz danych(PDF) 8 Page - Analog Devices

Numer części AD7142
Szczegółowy opis  Programmable Capacitance-to-Digital Converter with Environmental Compensation
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD7142 Arkusz danych(HTML) 8 Page - Analog Devices

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AD7142
Rev. 0 | Page 8 of 68
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 4. 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
AD7142-1
Figure 5. 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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