AD7142ACPZ-1500RL7 datasheet(2/70 Pages) AD

номер детали	AD7142ACPZ-1500RL7

подробное описание детали	Programmable Controller for Capacitance Touch Sensors

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AD7142

Data Sheet

Rev. B | Page 2 of 70

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 3

Specifications..................................................................................... 4

SPI Timing Specifications (AD7142)......................................... 6

I2C Timing Specifications (AD7142-1) ..................................... 7

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configurations and Function Descriptions ........................... 9

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 12

Capacitance Sensing Theory..................................................... 12

Operating Modes........................................................................ 13

Capacitance Sensor Input Configuration.................................... 14

CIN Input Multiplexer Setup.................................................... 14

Capacitance-to-Digital Converter................................................ 15

Oversampling the CDC Output ............................................... 15

Capacitance Sensor Offset Control.......................................... 15

Conversion Sequencer ............................................................... 15

CDC Conversion Sequence Time ............................................ 16

CDC Conversion Results........................................................... 17

Noncontact Proximity Detection ................................................. 18

Recalibration ............................................................................... 18

Proximity Sensitivity.................................................................. 18

FF_SKIP_CNT............................................................................ 21

Environmental Calibration ........................................................... 23

Capacitance Sensor Behavior Without Calibration............... 23

Capacitance Sensor Behavior with Calibration...................... 23

Slow FIFO.................................................................................... 24

SLOW_FILTER_UPDATE_LVL.............................................. 24

Adaptive Threshold and Sensitivity ............................................. 25

Interrupt Output............................................................................. 27

CDC Conversion Complete Interrupt..................................... 27

Sensor Touch Interrupt.............................................................. 27

GPIO INT Output Control ....................................................... 29

Outputs ............................................................................................ 31

Excitation Source........................................................................ 31

CSHIELD Output ............................................................................. 31

GPIO ............................................................................................ 31

Using the GPIO to Turn On/Off an LED................................ 31

Serial Interface ................................................................................ 32

SPI Interface................................................................................ 32

I2C Compatible Interface........................................................... 34

VDRIVE Input ................................................................................. 36

PCB Design Guidelines ................................................................. 37

Capacitive Sensor Board Mechanical Specifications............. 37

Chip Scale Packages ................................................................... 37

Power-Up Sequence ....................................................................... 38

Typical Application Circuits ......................................................... 39

Register Map ................................................................................... 40

Detailed Register Descriptions ..................................................... 41

Bank 1 Registers ......................................................................... 41

Bank 2 Registers ......................................................................... 51

Bank 3 Registers ......................................................................... 58

Outline Dimensions....................................................................... 70

Ordering Guide .......................................................................... 70

Аналогичный номер детали - AD7142ACPZ-1500RL7

производитель	номер детали	датащи	подробное описание детали
Analog Devices	AD7142ACPZ-1500RL71	844Kb / 73P	Programmable Controller for Capacitance Touch Sensors REV. A

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Аналогичное описание - AD7142ACPZ-1500RL7

производитель	номер детали	датащи	подробное описание детали
Analog Devices	AD7142	958Kb / 73P	Programmable Controller for Capacitance Touch Sensors REV. A
	AD7143	1,006Kb / 56P	Programmable Controller for Capacitance Touch Sensors REV. 0
	AD7143	589Kb / 57P	Programmable Controller for Capacitance Touch Sensors
	AD7143	784Kb / 57P	Programmable Controller for Capacitance Touch Sensors REV. 0
	AD7142ACPZ-500RL7	844Kb / 73P	Programmable Controller for Capacitance Touch Sensors REV. A
	AD7148	1Mb / 56P	Programmable Touch Controller for Single Electrode Capacitance Sensors REV. 0
	AD7147	889Kb / 73P	CapTouch Programmable Controller for Single-Electrode Capacitance Sensors REV. D
	AD7147	1Mb / 68P	CapTouch??Programmable Controller for Single-Electrode Capacitance Sensors REV. 0
Texas Instruments	TSC2301	1Mb / 94P	[Old version datasheet] PROGRAMMABLE TOUCH SCREEN CONTROLLER
ON Semiconductor	LC717A30UR	241Kb / 14P	Capacitance?륞igital?륝onverter LSI for Electrostatic Capacitive Touch Sensors November, 2018 ??Rev. 0

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