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データシートサーチシステム |
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AD7147ACPZ-1REEL データシート(PDF) 2 Page - Analog Devices |
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AD7147ACPZ-1REEL データシート(HTML) 2 Page - Analog Devices |
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2 / 68 page  AD7147 Rev. 0 | Page 2 of 68 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General description .......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 SPI Timing Specifications (AD7147)......................................... 5 I2C Timing Specifications (AD7147-1) ..................................... 6 Absolute Maximum Ratings............................................................ 7 ESD Caution.................................................................................. 7 Pin Configurations and Function Descriptions ........................... 8 Typical Performance Characteristics ............................................. 9 Theory of Operation ...................................................................... 11 Capacitance-Sensing Theory .................................................... 11 BIAS Pin....................................................................................... 12 Operating Modes........................................................................ 12 Capacitiance-to-Digital Converter............................................... 14 Oversampling the CDC Output ............................................... 14 Capacitance Sensor Offset Control.......................................... 14 Conversion Sequencer ............................................................... 14 CDC Conversion Sequence Time ............................................ 16 CDC Conversion Results........................................................... 16 Capacitance Sensor Input Configuration.................................... 17 CINx Input Multiplexer Setup .................................................. 17 Single-Ended Connections to the CDC .................................. 17 Noncontact Proximity Detection ................................................. 18 Recalibration ............................................................................... 18 Proximity Sensitivity .................................................................. 18 FF_SKIP_CNT............................................................................ 21 T Environmental Calibration ........................................................... 23 Capacitance Sensor Behavior Without Calibration............... 23 Capacitance Sensor Behavior with Calibration...................... 24 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 ACSHIELD 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 ......................................................................... 56 Outline Dimensions ....................................................................... 68 Ordering Guide .......................................................................... 68 REVISION HISTORY 09/07—Revision 0: Initial Version |
同様の部品番号 - AD7147ACPZ-1REEL |
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同様の説明 - AD7147ACPZ-1REEL |
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