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AD7147WPACPZ-RL データシート(PDF) 3 Page - Analog Devices |
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AD7147WPACPZ-RL データシート(HTML) 3 Page - Analog Devices |
3 / 71 page AD7147 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 3 Specifications..................................................................................... 4 Average Current Specifications .................................................. 5 SPI Timing Specifications (AD7147) ......................................... 6 I2C Timing Specifications (AD7147-1)...................................... 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 BIAS Pin....................................................................................... 13 Operating Modes........................................................................ 13 Capacitiance-to-Digital Converter............................................... 15 Oversampling the CDC Output ............................................... 15 Capacitance Sensor Offset Control.......................................... 15 Conversion Sequencer ............................................................... 15 CDC Conversion Sequence Time ............................................ 17 CDC Conversion Results........................................................... 17 Capacitance Sensor Input Configuration.................................... 18 CINx Input Multiplexer Setup.................................................. 18 Single-Ended Connections to the CDC .................................. 18 Noncontact Proximity Detection ................................................. 19 Recalibration ............................................................................... 19 Proximity Sensitivity.................................................................. 19 FF_SKIP_CNT............................................................................ 22 Environmental Calibration ........................................................... 24 Capacitance Sensor Behavior Without Calibration............... 24 Threshold Equations.................................................................. 25 Capacitance Sensor Behavior with Calibration...................... 25 Slow FIFO.................................................................................... 25 SLOW_FILTER_UPDATE_LVL.............................................. 26 Adaptive Threshold and Sensitivity ............................................. 27 Interrupt Output............................................................................. 29 CDC Conversion-Complete Interrupt .................................... 29 Sensor-Touch Interrupt ............................................................. 29 GPIO INT Output Control ....................................................... 31 Outputs ............................................................................................ 33 ACSHIELD Output .......................................................................... 33 General-Purpose Input/Output (GPIO) ................................. 33 Using the GPIO to Turn On/Off an LED................................ 33 Serial Interface ................................................................................ 34 SPI Interface................................................................................ 34 I2C-Compatible Interface .......................................................... 36 VDRIVE Input ................................................................................. 38 PCB Design Guidelines ................................................................. 39 Capacitive Sensor Board Mechanical Specifications............. 39 Chip Scale Packages ................................................................... 39 Power-Up Sequence ....................................................................... 40 Typical Application Circuits ......................................................... 41 Register Map ................................................................................... 42 Detailed Register Descriptions ..................................................... 43 Bank 1 Registers ......................................................................... 43 Bank 2 Registers ......................................................................... 53 Bank 3 Registers ......................................................................... 58 Outline Dimensions....................................................................... 70 Ordering Guide .......................................................................... 70 Automotive Products................................................................. 70 Rev. E | Page 2 of 70 |
同様の部品番号 - AD7147WPACPZ-RL |
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同様の説明 - AD7147WPACPZ-RL |
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