IQ Switch Azoteq ProxSense Series IQS550/572/525-B000 DATASHEET Projected capacitive trackpad/touchscreen controller with proximity, touch, snap, trackpad outputs and gestures. The IQS5xx-B000 is a projected capacitive touch and proximity trackpad/touchscreen controller implementation on the IQS550, IQS572 and IQS525 platforms. The IQS5xx- B000 features best in class sensitivity, signal-to-noise ratio and automatic tuning of electrodes. Low power proximity detection allows extreme low power operation. Main Features > Proximity, touch and snap* on each channel > Multi-touch support up to 5 fingers > Single and multi-finger gestures > 3584 x 2304 max resolution (IQS550) > Scale, orientation and electrode layout selection 2 > I C communication interface > ATI: automatic tuning for optimum sensitivity > Supply Voltage 1.65V to 3.6V > Proximity low power operation (<10uA) > 3 Active and 2 low power modes > Event and streaming modes > Internal voltage regulator and reference capacitor > On-chip noise detection and suppression IQS550 IQS572 IQS525 Maximum channels 150 72 25 Typical report rate 100Hz 135Hz 190Hz (with single touch / all channels active) Maximum resolution 3584 x 2304 2048 x 1792 1280 x 768 (for shown Tx Rx configurations) (15 x 10) (9 x 8) (6 x 4) Applications > Compact Capacitive Keyboards > Remote Control Trackpads > Appliances > Navigation devices > Kiosks and POS terminals > E-reader T QFN(7x7)-48 QFN(4x4)-28 QFN(4x4)-28 A -40C to 85C IQS550 IQS572 IQS525 *Patented Copyright Azoteq (Pty) Ltd 2019. IQS5xx-B000 Datasheet Page 1 of 76 All Rights Reserved. Revision 2.1 September 2019 IQ Switch Azoteq ProxSense Series Contents 1 OVERVIEW.................................................................................................................................................7 2 PACKAGING AND PIN-OUT .....................................................................................................................8 2.1 IQS550 - QFN48 .........................................................................................................................8 2.2 IQS572 - QFN28 ...................................................................................................................... 10 2.3 IQS525 - QFN28 ...................................................................................................................... 12 3 PROXSENSE MODULE ....................................................................................................................... 14 3.1 CHANNEL DEFINITION ................................................................................................................. 14 3.2 ALTERNATE LOW-POWER CHANNEL (ALP) .................................................................................. 14 3.3 COUNT VALUE ........................................................................................................................... 14 3.3.1 Trackpad Count Values ................................................................................................................ 14 3.3.2 ALP Count Values ........................................................................................................................ 14 3.3.3 Max Count .................................................................................................................................... 15 3.3.4 Delta Value ................................................................................................................................... 15 3.4 REFERENCE VALUE .................................................................................................................... 15 3.4.1 Reference Update Time................................................................................................................ 15 3.4.2 ALP Long-Term Average .............................................................................................................. 15 3.4.3 Reseed.......................................................................................................................................... 15 3.5 CHANNEL OUTPUTS ................................................................................................................... 15 3.5.1 Proximity ....................................................................................................................................... 16 3.5.2 Touch ............................................................................................................................................ 16 3.5.3 Snap.............................................................................................................................................. 16 3.5.4 Output Debounce .......................................................................................................................... 16 3.5.5 Maximum Touch ........................................................................................................................... 17 3.6 AUTO TUNING (ATI) ................................................................................................................... 17 3.6.1 ATI C Multiplier ............................................................................................................................. 17 3.6.2 ATI Compensation & Auto ATI ..................................................................................................... 17 3.7 AUTOMATIC RE-ATI ................................................................................................................... 17 3.7.1 Description .................................................................................................................................... 17 3.7.2 Conditions for Re-ATI to activate .................................................................................................. 18 3.7.3 ATI Error ....................................................................................................................................... 18 3.7.4 Design requirements ..................................................................................................................... 18 3.8 SENSING HARDWARE SETTINGS .................................................................................................. 19 4 SENSING MODES .................................................................................................................................. 19 4.1 REPORT RATE ........................................................................................................................... 20 4.1.1 Previous Cycle Time ..................................................................................................................... 20 4.2 MODE TIMEOUT ......................................................................................................................... 20 4.3 MANUAL CONTROL ..................................................................................................................... 20 5 TRACKPAD ............................................................................................................................................. 20 5.1 CONFIGURATION ........................................................................................................................ 20 5.1.1 Size Selection ............................................................................................................................... 20 5.1.2 Individual Channel Disabling ........................................................................................................ 20 5.1.3 Rx / Tx Mapping ............................................................................................................................ 20 5.1.4 Rx / Tx Selections ......................................................................................................................... 21 5.2 TRACKPAD OUTPUTS .................................................................................................................. 21 5.2.1 Number of Fingers ........................................................................................................................ 21 5.2.2 Relative XY ................................................................................................................................... 21 5.2.3 Absolute XY .................................................................................................................................. 21 Copyright Azoteq (Pty) Ltd 2019. IQS5xx-B000 Datasheet Page 2 of 76 All Rights Reserved. Revision 2.1 September 2019