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proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 1 of 15 all rights reserved IQS229 datasheet single channel capacitive proximity/touch controlle r for sar applications the IQS229 proxsense ? ic is a self-capacitance controller designed for d evices that are required to meet sar regulations. the IQS229 can de tect a long term presence through movement detection algorithms when the device (e.g. tablet or cell phone) is handled. the IQS229 can be used in any application requiring long-term activation by animated objects. a movement detection algorithm will indicate the pr esence of a user and aid in the long-term stability of the solution. the device operates stan dalone and can be configured via digital inputs. features sar compliance in mobile devices according to the iec 62209-2 ed1.0 standard and the fcc standard (kdb 616217 - d04 sar for laptop and tablets v01) failsafe firmware/hardware design a utomatic t uning i mplementation (ati) - automatic adjustment for optimal sensor performance minimal external components standalone operation 25mm detection distance up to 60pf sensor load on-chip movement detection algorithm i nternal c apacitor i mplementation (ici) C reference capacitor on-chip configuration settings via external pins activation threshold movement filter threshold activation time-out supply voltage: 1.8v to 3.6v low power consumption: 30ua (sub 10ua in sleep mode) low profile dfn10 package (3x3) applications sar detection for tablets and mobile phones sar detection for wireless charging stations (operating frequency > 100 mhz) sar detection for usb dongle-type devices movement detection devices (anti-theft) reed relay replacement white goods and appliances human interface devices proximity activated backlighting applications with long-term activation available packages t a dfn10 (3x3) -40 c to 85 c IQS229
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 2 of 15 all rights reserved 1 overview 1.1 device the IQS229 is a device tailored for long- term proximity or touch activations. it offers two boolean outputs, one with an activation threshold for large capacitive shifts and the other with a threshold for small movements even during a normal activation. 1.1.1 normal operation with a normal activation (hand brought close) the output will become active. the output will de-activate as soon as the action is reversed (hand taken away). in addition a separate movement output will become active when movement is detected m ov_out pin out pin threshold lta (long term average) counts (capacitance) timer reset cross threshold before time-out time figure 1.2 plot of IQS229 streaming data along with the digital response figure 1.1 flow diagram of the IQS229 user interfac e
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 3 of 15 all rights reserved according to a movement threshold. movement may be detected before the normal threshold is crossed. movement detection is done via a completely separate digital filter while improving the efficiency of the sensor output (timer reset on movement). 1.1.2 long term activation in a normal activation the output will stay active for as long as movements are detected. a time-out timer (configurable time) will be reset with each movement. 1.1.3 long term recovery when changing the sensor capacitive environment, the sensor will adapt to the new environment. if the new environment decreases capacitance (wooden table to air), the sensor will rapidly adapt in order to accept new human activations. if the new environment increases capacitance (like air to steel table), the sensor will remain in activation until a time-out occurs (as seen in figure 1.3) or until the device is returned to its previous environment. when the timer runs out, the output will be de-activated. re-calibration is possible after de-activation because the timer will only time-out with no movement around the sensor. 1.1.4 fail-safe features for sar application the device includes various features to ensure fail-safe operation: active low with pull-down resistor ensures activation with failure (at the cost of leakage current with no activation) hard reset by pulling the movement pin low. this allows for a restart and device status check. characteristic toggle on output pin with power-up and soft reset to check if the ic is functioning. m ov_out pin out pin threshold lta (long term average) counts (capacitance) timer reset below threshold w ith time-out time no mov ement time-out (default 3min) counts & lta figure 1.3 example of a time-out event with re-cali bration
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 4 of 15 all rights reserved 1.1.5 integrated features the device includes an internal voltage regulator and reference capacitor (c s ). various advanced signal processing techniques are combined for creating a robust solution. these techniques include: movement detection filter (to release an activation in the case of inactivity) advanced noise filtering on incoming sample stream superior methods of parasitic capacitance compensation while preserving sensitivity 1.1.6 data streaming a 1-wire data streaming interface is offered for debugging purposes. streaming mode and stand-alone mode are interchangeable via simple hardware configurations. this is offered because streaming may be useful at various stages of a design. streaming mode is offered through a simple pull-up resistor on the standard digital output pin. standalone mode is enabled through a pull-down resistor on this pin. 1.1.7 hardware configuration options various configuration options are made available through digital input pins. these include: the activation threshold, inactivity time-out settings and movement threshold selection special device configurations are only available on special request and can be done by setting one time programmable (otp) options. these will only be available on special orders, aiming to meet most needs with configuration pins. 1.1.8 automatic calibration proven automatic tuning implementation (ati) algorithms are used to calibrate the device to the sense electrode. this algorithm is optimised for applications where a fixed detection distance (in mid-air) is required for failure safe detection. 1.1.9 capacitive sensing method the charge transfer method of capacitive sensing is employed on the IQS229. (the charge transfer principle is thoroughly described in the application note: azd004 - azoteq capacitive sensing .) 1.2 operation 1.2.1 device setup typical device use allows for very little to no setup before integration. a few characteristics may be fixed via four of the IQS229 pins - each having three possible pin states. this should suffice for most simple and intended applications. note: it is important that any pins connected to an mcu are kept high impedance (hi-z) from the mcu side during power-up. this is to ensure correct start-up especially with a high impedance strap resistor on the out pin for standalone power-up. 1.2.2 configuration pin setup configuration options are selected by: floating a pin pull-up resistor pull-down resistor see section 4 for choosing a specific configuration. for configurations not covered by the configuration pins, custom ics will be available in bulk orders. information on custom configurations are available on special request. at start-up device parameters are read and set according to the configuration pin states. configuration pins are then changed to digital outputs and are written to the state that was read (for minimising current consumption). floating pins are written low. after configuration, calibration routines are
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 5 of 15 all rights reserved run which can be run periodically in order to run with optimal sensitivity. 1.2.3 movement filters the movement filter runs continually and the dedicated digital output will activate for a time depending on the intensity of the movement. 1.2.4 external control the movement output (optional line to connect to master device) can be used to signal a reseed or sleep mode. a short pulse will force the reference counts (long- term average) to match the actual counts (capacitance of sensor). by writing the pin low for a longer time, will force the ic into sleep mode for low current consumption (2ua + required pull-up on movement pin). in sleep mode the output pin is written low in order to minimise current consumption. 1.2.5 low power options as mentioned in the section above, a charge halt will initiate the sleep mode. the device will reset and return to normal power as soon as the line is released. 1.3 applicability all specifications, except where specifically mentioned otherwise, provided by this datasheet are applicable to the following ranges: temperature:-40c to +85c supply voltage (v ddhi ): 1.8v to 3.6v 1.4 passing the sar qualification testing with the IQS229 for design information on passing the sar qualification testing with azoteq movement based sensors, please see the application note: azd073 sar qualification with azoteq movement-based sensors
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 6 of 15 all rights reserved 2 packaging and pin-out the IQS229 is available in a dfn10 (3x3) package. figure 2.1 IQS229 pin-out (dfn10 package) table 2.1 pin-out description IQS229 in dfn10 pin name type function 1 timer digital input no movement timeout period selection 2 vss signal gnd 3 crx0 sense electrode connect to conductive area intended for sensor 4 vddhi supply input supply:1.8v C 3.6v 5 vreg regulator output requires external capacitor 6 thr1 digital input threshold1 selection (fine) 7 mov_thr digital input movement threshold selectio n 8 thr0 digital input threshold0 selection (coarse) 9 out digital output/input activation output (active low) / 1-wire data / input at power-up to determine standalone or streaming 10 mov_out digital output/input movement output (active low) / input for reseed and charge halt 3 reference design figure 3.1 reference schematic 229 timer vss crx0 vddhi vreg mov_out out thr0 mov_thr thr1 12 3 4 5 10 98 7 6
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 7 of 15 all rights reserved 4 configuration options 4.1 activation threshold the threshold adjustment is offered through 3 configuration pins. thr0 is a first level of threshold adjustment. thr1 is a second level for refining the threshold. l = logic low, h = logic high, f = float thr0 (pin 8) l l l f f f h h h thr1 (pin 6) l f h l f h l f h corresponding threshold level 0 1 2 3 4 5 6 7 8 ? more sensitive less sensitive ? it is important to note that most sensitive settings are heavily dependent on design factors influencing snr. these may be in order where fail-safe activations are required, but is not recommended for activation critical applications. 4.2 timer settings large environmental shifts (capacitance increases or decreases) are regarded as activations. such conditions are intelligently cleared via the movement filter and timer. the timer would reset with each detected movement. if no movement is detected for the duration of the timer, the activation will be cleared. a few options exist for the duration of this timer. timer options are a summarized in the table below: timer (pin 1) time-out low 60sec float 3min high 10min for custom timers the IQS229 makes it possible to distinguish between a threshold release and a no-movement release. the master device may then override the IQS229 output until the custom master timer has expired. figure 4.1 normal release with threshold crossing (top), time-out release after no- movement condition (bottom) 4.3 human movement filter threshold the mov_thr pin offers adjustment of the threshold used to determine if a movement event should be triggered. from a default setting (pin floating), the threshold can be increased or decreased by a percentage of the capacitive sensor operating point (long-term average). mov_thr (pin 7) movement threshold low more sensitive float default high less sensitive out pin out pin
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 8 of 15 all rights reserved 5 design considerations 5.1 power supply and pcb layout azoteq ic's provide a high level of on-chip hardware and software noise filtering and esd protection (refer to application note azd013 C esd overview ). designing pcb's with better noise immunity against emi, ftb and esd in mind, it is always advisable to keep the critical noise suppression components like the de-coupling capacitors and series resistors in figure 3.1. as close as possible to the ic. always maintain a good ground connection and ground pour underneath the ic. for more guidelines please refer to the relevant application notes as mentioned in the next section. 5.2 design rules for harsh emc environments applicable application notes: azd013, azd015, azd051, and azd052. 5.3 high sensitivity through patented design and advanced signal processing, the device is able to provide extremely high sensitivity to detect proximity. this enables designs to detect proximity at distances that cannot be equaled by most other products. when the device is used in environments where high levels of noise or floating metal objects exist, a reduced proximity threshold is proposed to ensure reliable functioning of the sensor. the high sensitivity also allows the device to sense through overlay materials with low dielectric constants, such as wood or porous plastics. for more guidelines on the layout of capacitive sense electrodes, please refer to application note azd008 - design guidelines for touch pads , available on the azoteq web page: www.azoteq.com .
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 9 of 15 all rights reserved 6 1-wire data streaming mode the IQS229 has the capability to stream data over the out pin to a master controller or debugging device. this provides the designer with the capability to obtain the parameters within the device in order to aid design into applications. data streaming is performed as a 1-wire data protocol on the out pin. the function of this pin is therefore lost when the device is placed in streaming mode. the function of the mov_out pin remains. the mov_out pin may now be used to only read streaming data when movements occur. this enables 1-wire data processing only on the occurrence of movement events. data streaming can be enabled as shown in figure 3.1 by simply placing a strong pull-up resistor on the out pin (4.7k ? is recommended). debugging and qualification during production may be done by simply probing the output pin with a strong pull-up while the weaker pull-down (1m ? ) is placed on the pcb. this will put the standalone module in 1-wire streaming mode. data streaming is initiated by the IQS229. when data streaming is enabled data is sent following each charge cycle. figure 6.1 illustrates the communication protocol for initialising and sending data with the 1 wire communication protocol. 1. communication is initiated by a start bit. bit defined as a low condition for t start . 2. following the start bit, is a synchronisation byte (t init = 0xaa). this byte is used by the mcu for clock synchronisation. 3. following t init the data bytes will be sent. 20 bytes will be sent after each charge cycle. 4. each byte sent will be preceded by a start bit and a stop bit will follow every byte. 5. stop bit indicated by taking pin 1 high. the stop bit does not have a defined period. figure 6.1 1-wire data streaming mode d17 d18 d19 d3 d2 d1 d0
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 10 of 15 all rights reserved the following table defines the data streamed from the IQS229 device during streaming mode. table 6.1 byte definitions for 1-wire streaming mode byte bit value 0 7:0 7 6 5 4 3 2 1 0 system flags activation movement timer active filter halt is channel 0 ati tuning busy noise detected zoom 1 15:8 ch0 cs high byte 2 23:16 ch0 cs low byte 3 31:24 ch0 lta high byte 4 39:32 ch0 lta low byte 5 47:40 ch1 cs high byte 6 55:48 ch1 cs low byte 7 63:56 ch1 lta high byte 8 71:64 ch1 lta low byte 9 79:72 movement filter 10 87:80 movement filter 11 95:88 entry threshold high byte 12 103:96 entry threshold low byte 13 111:104 exit threshold high byte 14 119:112 exit threshold low byte 15 127:120 127:124 123:122 121:220 strap configuration activation threshold timer setting movement threshold 16 135:128 multiplier channel 0 17 143:136 multiplier channel 1 18 151:144 parasitic capacitance compensation (pcc) channel 0 19 159:152 parasitic capacitance compensation (pcc) channel 1 azoteq provides a graphic user interface to evaluate the user interface and debug current designs. sample code available: azd017 - iqs127 1- wire protocol sample code this code represents the same protocol and only needs to be adapted for the longer data stream.
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 11 of 15 all rights reserved 7 specifications 7.1 absolute maximum ratings the following absolute maximum parameters are speci fied for the device: exceeding these maximum specifications may cause da mage to the device. operating temperature -40c to 85c supply voltage (vddhi C vss) 3.6v maximum pin voltage vddhi + 0.5v (may not exceed vddhi max) maximum continuous current (for specific pins) 10ma minimum pin voltage vss - 0.5v minimum power-on slope 100v/s esd protection 8kv (human body model) package moisture sensitivity level (msl) 3 (packa ge testing in progress, lower value expected) table 7.1 IQS229 general operating conditions 1 description conditions parameter min typ max unit supply voltage v ddhi 1.8 3.3v 3.6 v internal regulator output 1.8 v ddhi 3.6 v reg 1.62 1.7 1.79 v default operating current 3.3v i IQS229np - 100 a low power setting 1* 3.3v, lp=32 i IQS229lp32 - <40 a low power setting 2* 3.3v, lp=64 i IQS229lp64 - <20 a low power setting 3* 3.3v, lp=256 i IQS229lp256 - <10 a *lp interval period = low power value (lp) x 1ms table 7.2 start-up and shut-down slope characterist ics description conditions parameter min max unit power on reset v ddhi slope 100v/s @25c por 1.2 1.6 v brown out detect v ddhi slope 100v/s @25c bod 1.15 1.6 v 1 operating current shown in this datasheet does incl ude power dissipation through the recommended 1m ? strapping resistor on the out pin for failsafe modes.
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 12 of 15 all rights reserved 8 package information table 8.1 dfn-10 package dimensions (bottom) dimension [mm] a 3 0.1 b 0.5 c 0.25 d n/a f 3 0.1 l 0.4 p 2.4 q 1.65 table 8.2 dfn-10 package dimensions (side) dimension [mm] g 0.05 h 0.65 i 0.7-0.8 table 8.3 dfn-10 landing dimensions dimension [mm] a 2.4 b 1.65 c 0.8 d 0.5 e 0.3 f 3.2 figure 8.1 dfn-10 package dimensions (bottom) figure 8.2 dfn-10 package dimensions (side) figure 8.3 dfn-10 landing dimensions
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 13 of 15 all rights reserved 9 ordering and part-number information 9.1 ordering information please check stock availability with your local dis tributor. configuration zzz zzz zz = ic configuration (hexadecimal) default 000 000 00 (other configurations available on special request) package type dn = dfn(3x3)-10 bulk packaging r = reel (3000pcs/reel) C moq = 3000pcs moq = 1 reel (orders shipped as full reels) 9.2 device numbering convention revision x = ic revision number temperature range t = -40c to 85c (industrial) date code p = internal use wwyy = batch number
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 14 of 15 all rights reserved 10 revision history revision number description date of issue v0.9 draft revision 22 august 2013 v0.9.1 pre-release 1 october 2013 v1.0 release 7 october 2013
proxsense ? series copyright ? azoteq 2013 IQS229 datasheet v1.0 page 15 of 15 all rights reserved appendix a contact information usa asia south africa physical address 6507 jester blvd bldg 5, suite 510g austin tx 78750 usa rm 1725 , glittery city shennan rd futian district shenzhen, 518033 china 109 main street paarl 7646 south africa postal address 6507 jester blvd bldg 5, suite 510g austin tx 78750 usa rm 1725 , glittery city shennan rd futian district shenzhen, 518033 china po box 3534 paarl 7620 south africa tel +1 512 538 1995 +86 755 8303 5294 ext 808 +27 21 863 0033 fax +1 512 672 8442 +27 21 863 1512 email kobusm@azoteq.com linayu@az oteq.com.cn info@azoteq.com please visit www.azoteq.com for a list of distributors and worldwide represent ation. the following patents relate to the device or usage of the device: us 6,249,089 b1, us 6,952,084 b2, u s 6,984,900 b1, us 7,084,526 b2, us 7,084,531 b2, ep 1 120 018 b2, ep 1 206 168 b1, ep 1 308 913 b1, ep 1 530 178 a1, zl 99 8 14357.x, aus 761094, hk 104 14100a, us13/64 4,558, us13/873,418 iq switch ? , swipeswitch?, proxsense ? , lightsense?, airbutton ? and the logo are trademarks of azoteq. the information in this datasheet is believed to be accur ate at the time of publication. azoteq uses reasonable effort to maintain the information up-to-date and a ccurate, but does not warrant the accuracy, completeness or reliability of the informati on contained herein. all content and information are provided on a as is basis only, without any represent ations or warranties, express or implied, of any kind, including representations abo ut the suitability of these products or information for any purpose. azoteq disclaims all warranties and conditio ns with regard to these products and information, including but not limited t o all implied warranties and conditions of merchantabil ity, fitness for a particular purpose, title and non-i nfringement of any third party intellectual property rights. azoteq assumes no liability for any damages or injury arising from any use of the i nformation or the product or caused by, without limitat ion, failure of performance, error, omission, interruption, defect, delay in operati on or transmission, even if azoteq has been advised of the possibility of such damages. the applications mentioned herein are used solely for the purpose of illustration and azoteq makes no war ranty or representation that such applications will be sui table without further modification, nor recommends the use of its products for application that may present a risk to human life due t o malfunction or otherwise. azoteq products are not aut horized for use as critical components in life support devi ces or systems. no licenses to patents are granted, implicitly, express or im plied, by estoppel or otherwise, under any intellectual property rights. in the event that any of the abovemen tioned limitations or exclusions does not apply, it is agreed that azoteqs total liability for all losses, damages and causes of action (in contract, tort (including without limitation, neglig ence) or otherwise) will not exceed the amount already paid by the customer for the products. azoteq reserves the right to alter its produc ts, to make corrections, deletions, modifications, enhancem ents, improvements and other changes to the content and information, its products, programs and services at any time or to move or d iscontinue any contents, products, programs or services witho ut prior notification. for the most up-to-date information an d binding terms and conditions please refer to www.azot eq.com. www.azoteq.com info@azoteq.com

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