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IQS316 Dataheets PDF



Part Number IQS316
Manufacturers Azoteq
Logo Azoteq
Description Multi-channel Capacitive Sensing Controller
Datasheet IQS316 DatasheetIQS316 Datasheet (PDF)

IQS316 Datasheet IQ Switch® - ProxSense® Series Multi-channel Capacitive Sensing Controller with Advanced Signal Processing Functions The IQS316 is a 20 channel surface capacitive touch and proximity controller with advanced onchip signal processing features, including Antenna Tuning Implementation (ATI). Proximity detection can be distributed over all keys, or only selected keys, providing high flexibility for stable operation in varying designs. The controller is based on patented capacitive .

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IQS316 Datasheet IQ Switch® - ProxSense® Series Multi-channel Capacitive Sensing Controller with Advanced Signal Processing Functions The IQS316 is a 20 channel surface capacitive touch and proximity controller with advanced onchip signal processing features, including Antenna Tuning Implementation (ATI). Proximity detection can be distributed over all keys, or only selected keys, providing high flexibility for stable operation in varying designs. The controller is based on patented capacitive sensing technology that yields stability with high sensitivity and excellent noise immunity. This controller can operate with a small number of external components to provide a low cost solution for medium to high channel count applications. Main Features 16 Touch Keys with distributed Proximity Sensing Internal Capacitor Implementation (ICI). No external reference capacitors required Class leading proximity sensitivity with dedicated Prox Mode charging scheme User selectable gain through Antenna Tuning Implementation (ATI) All channels individually configurable for maximum design flexibility Advanced on-chip signal processing User selectable I2C and SPI communication High sensitivity Internal voltage regulator Supply voltage 2.85V-5.5V Low power modes (45uA) Active shield options RF detection Available in QFN(5x5)-32 package 8 General Purpose I/O’s Applications Representation only, not actual marking Office machines Digital cameras Keypads High-end kitchen appliances Personal Media Players Consumer Electronics White goods and appliances Kiosk and POS Terminals Launch a menu on user approaching Available options TA -40°C to 85°C QFN32 IQS316 Copyright © Azoteq (Pty) Ltd 2015 All rights reserved. IQS316 Datasheet Revision 1.02 Page 1 of 27 April 2015 IQ Switch® ProxSense® Series Contents IQS316 Datasheet ...........................................................1 5.2.2 5.2.3 5.2.4 5.2.5 Cx Sensors Requiring Shield ....................... 12 Cx Sensors Used For Prox........................... 12 Cx Sensors plus I/O’s.................................. 13 Unused Cx’s................................................ 13 6 Communication ....................................................13 1 Overview................................................................3 6.1 Communication Selection............................... 13 2 Packaging and Pin-out............................................4 6.2 Watchdog Timeout and MCLR ....................... 13 2.1 QFN32............................................................... 4 2.2 ICTRL................................................................. 5 3 ProxSense® Module ................................................5 3.1 Charge Transfer Concepts ................................ 5 3.2 Charging Modes ............................................... 6 3.2.1 Prox Mode Charging .................................... 6 3.2.2 Touch Mode Charging.................................. 6 3.2.3 Interaction Between Prox and Touch Mode 7 3.2.4 Low Power Charging .................................... 7 6.3 SPI................................................................... 13 6.3.1 SPI read ...................................................... 14 6.3.2 SPI write ..................................................... 14 6.3.3 SPI Communications Window Terminate Command................................................................ 15 6.4 I2C ................................................................... 15 6.4.1 Control byte and Device Address............... 15 6.4.2 6.4.3 6.4.4 I2C read....................................................... 15 I2C write ..................................................... 15 I2C Communications Window Terminate Command................................................................ 16 3.3 Prox Module Setup ........................................... 8 6.5 Circuit diagrams (all features) ........................ 16 3.3.1 Report rate................................................... 8 3.3.2 Transfer Frequency ...................................... 8 7 Electrical specifications.........................................18 3.3.3 Count Value.................................................. 8 3.3.4 Prox Mode Channel Filters........................... 8 7.1 Absolute maximum specifications.................. 18 3.3.5 Environmental Drift ..................................... 8 7.2 Operating conditions (Measured at 25°C)...... 18 3.3.6 LTA Filter ...................................................... 8 3.3.7 Filter Halt ..................................................... 8 7.3 Moisture Sensitivity Level ............................... 18 3.3.8 Touch Sensitivity (Touch Mode channels 7.4 Timing characteristics (Measured at 25°C) .... 19 only) 9 3.3.9 Proximity Sensitivity (Prox and Touch Mode 8 Mechanical Dimensions ........................................20 channels)........................................................


AS4C4M32S IQS316 IQS316-0-QFR


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