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IQS525-B000 Datasheet Preview

IQS525-B000 Datasheet

Capacitive Trackpad/Touchscreen Controller

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ProxSense®
IQS550/572/525-B000 Capacitive Trackpad/Touchscreen Controller
Projected capacitive 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
I2C 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
Maximum channels
Typical report rate
(with single touch / all channels active)
IQS550
150
100Hz
IQS572
72
135Hz
IQS525
25
190Hz
Maximum resolution
(for shown Tx Rx configurations)
3584 x 2304 2048 x 1792 1280 x 768
(15 x 10)
(9 x 8)
(6 x 4)
Applications
Compact Capacitive Keyboards
Remote Control Trackpads
Appliances
Navigation devices
Kiosks and POS terminals
E-readers
*patented
TA QFN(7x7)-48 QFN(4x4)-28 QFN(4x4)-28
-40°C to 85°C
IQS550
IQS572
IQS525
Copyright © Azoteq (Pty) Ltd
All Rights Reserved.
IQS5xx-B000 Trackpad Datasheet
Revision 2.0
Page 1 of 79
November 2016




Azoteq

IQS525-B000 Datasheet Preview

IQS525-B000 Datasheet

Capacitive Trackpad/Touchscreen Controller

No Preview Available !

IQ Switch®
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 ..................................................................................................................................................... 15
3.5.2 Touch .......................................................................................................................................................... 16
3.5.3 Snap ............................................................................................................................................................ 16
3.5.4 Output Debounce ....................................................................................................................................... 16
3.5.5 Maximum Touch ......................................................................................................................................... 16
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 ................................................................................................................ 17
3.7.3 ATI Error ...................................................................................................................................................... 18
3.7.4 Design requirements................................................................................................................................... 18
3.8 Sensing Hardware Settings.............................................................................................................................. 18
4 Sensing Modes ..................................................................................................................................................19
4.1 Report Rate ..................................................................................................................................................... 19
4.1.1 Previous Cycle Time .................................................................................................................................... 20
4.2 Mode Timeout ................................................................................................................................................. 20
4.3 Manual Control ............................................................................................................................................... 20
5 Trackpad ...........................................................................................................................................................20
5.1 Configuration................................................................................................................................................... 20
Copyright © Azoteq (Pty) Ltd
All Rights Reserved.
IQS5xx-B000 Trackpad Datasheet
Revision 2.0
Page 2 of 79
November 2016


Part Number IQS525-B000
Description Capacitive Trackpad/Touchscreen Controller
Maker Azoteq
Total Page 30 Pages
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