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i q switch ? proxsense ? series IQS156 datasheet iq switch ? - proxsense ? series minimalist capacitive sensor with compensation for sensitivity reducing objects unparalleled features sub 6 ua current consumption automatic tuning for optimal operation in various environments the IQS156 proxsense ? ic is a fully integrated six channel capacitive contact and proximity sensor with market leading sensitivity and a utomat ic t uning to the sens e electrodes . the IQS156 provides a minimalist implementation requiring as few as 2 external components . the device is ready for use in a large range of applications while p rogramming options allow customisation for specialized application s. main features 6 channel input device i 2 c data output ati: automatic t uning to optimum sensitivity supply v oltage 3 v to 5 .5 v 8 power modes (6 a min ) internal voltage regulator and reference capacitor large proximity detection range automatic drift compensation development and programming tools available (visualproxsense and usbp r og) small outline msop C 10 applications white goods and appliances office equipment, toys, sanitary ware flame proof, hazardous environment human interface devices proximity detection that enables backlighting activation (azoteq patent ed ) wake - up from standby applications replacement for electromechanical switches gui trigger on p rox imity detection . available options t a msop - 10 - 40 c to 85 c IQS156 iqs143 msop10 representations only, not actual markings
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 2 of 24 all rights reserved. revision 1. 7 october 2012 functional overview 1 introduction the IQS156 is a six channel projected capacitive proximity and touch sensor featuring internal voltage regula to r and reference capacitor (c s ). the device has five dedicated input p in s for the connection of the sense electrode s , which comprises of three receivers, and two transmitters . two output pins are used for serial dat a communication through the i2c protocol. th e device s automatically track s slow varying environmental changes via various filters, detect noise and has an automatic automatic tuning implementation (ati) to tune the device for optimal sensitivity . 1.1 applicability all specifications , except where specifically mentioned otherwise, provided by this datasheet are applicable to the following ranges : temperature - 40 c to +85 c supply voltage (v ddhi ) 3 v to 5 .5 v 1.2 pin - outs figure 1.1 IQS156 pin - outs . table 1.1 IQS156 pin - outs. pin i 2 c function 1 gnd ground 4 vddhi power input 5 vreg regulator pin 2 crx0 receiver electrode 3 crx1 receiver electrode 9 crx2 receiver electrode 10 ctx0 transmitter electrode 6 ctx1 transmitter electrode 7 sda i 2 c data 8 scl i 2 c clock 2 analogue functionality the analogue circuitry measures the capacitance of the sense electrode s attached to the cx pin s through a charge transfer process that is periodically initiated by the digital circuitry. the measuring process is referred to a conversion and consists of the discharging of c s and cx, the charging of cx and then a series of charge transfers from cx to c s un til a trip voltage is reached . the number of charge transfers required to reach the trip voltage is referred to as the count values (cs). the capacitance measurement circuitry makes use of an internal c s and voltage reference (v reg ). the analogue circuitry further provides functionali ty for: 1 . g n d 2 . c r x 0 3 . c r x 1 4 . v d d h i 5 . v r e g 1 0 . c t x 0 9 . c r x 2 8 . s c l 7 . s d a 6 . c t x 1
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 3 of 24 all rights reserved. revision 1. 7 october 2012 p ower on reset (por) detection. brown out detection (bod). 3 digital functionality the digital processing functionality is responsible for: management of bod and wdt events. initiation of conversions at the selected rate. processing of cs and e xecution of algorithms . monitoring and automatic execution of the ati algorithm. signal processing and digital filtering. detecti on of prox and touch events. manag ing outputs of the device. manag ing serial communications. detailed description 4 reference design figure 4.1 reference design . figure 4.2 output in active low. 5 high sensitivity through patented design and advanced signal processing , the device is able to provide extremely high sensitivit y to dete ct proximity. this enables designs that can detect proximities at distances that cannot be equalled by most other products. when the device is used in environments where noise or ground effects exist that lower the sensitivity , a reduced proximity threshold is proposed to ensure reliable functioning of the s ensor . the high sensitivity allows the device to sense use c3 and c4 for added rf immunity. place c1 - c4 as close as possible to ic, connected to good gnd. r6 and r7 used as pull up resistors for i 2 c protocol.
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 4 of 24 all rights reserved. revision 1. 7 october 2012 accurately through overlays with low dielectric constants like wood or even air gaps. 6 adjustable proximity threshold the IQS156 has a default proximity threshold of 4 . the proximity threshold is selected by the design er (1 to 64) to obtain the desired sensitivity and noise immunity through the i 2 c serial interface . the proximity event is triggered based on the selected proximity threshold; the cs, lta (long term average) and ltn (long term noise) filter. the threshold is expressed in terms of counts; the same as cs . a proximity event is identified when for at least 4 consecutive samples the following equation holds: p th = < lta - cs where lt a is the long term average 7 adjustable touch thresholds the IQS156 has a default touch threshold of 96 (for all six channels) . the touch threshold is selected by the designer to obtain the desired touch sensitivity and is selectable in the memory map, individually for each channel. the touch event is triggered base d on t th , cs and lta. a touch event is identified when for at least 4 consecutive samples the following equation holds: t th =< lta - cs with lower average cs (therefore lower lta) values the touch threshold will be lower and vice versa. 8 charge transfers the IQS156 charges in 7 timeslots, with one internal cs capacitor. the charge sequence is shown in figure 8.1 , where ch0 is the prox channel, and charges before each of the 6 input channels. figure 8.1 IQS156 charge transfer. 9 data streaming the IQS156 device interfaces to a master controller via a 2 wire serial interface bus that is i 2 c tm compatible . the iqs 156 can only function as a slave device on the bus. the bus must be control led by a master device which generates the serial clock (scl), controls bus access, and generates the start and stop conditions. the serial clock (scl) and serial data lines (sda) are open - drain and therefore must be pulled high to the operating voltage wi th a pull - up resistor (typically 10k) . 9.1 bus characteristics the following bus protocol has been defined: data transfer may only be initiated when the bus is not busy during data transfer the data line must remain stable whenever the clock line is high. changes in the data line while the clock is high will be interpreted as start and stop conditions. the following conditions have been defined for the bus (refer to fi gure 9.1 ): c h 0 p r o x c h 1 0 c h 2 0 c h 3 0 c h 4 0 c h 5 0 c h 6 0 c h 1 + c h 2 + c h 3 c t x 0 c r x 0 c t x 0 c r x 1 c t x 0 c r x 2 c t x 1 c r x 0 c t x 1 c r x 1 c t x 1 c r x 2
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 5 of 24 all rights reserved. revision 1. 7 october 2012 figure 9.1 data transfer sequence on the serial bus . 9.1.2 bus idle (a) the scl and sda line s are both high. 9.1.3 start condition (b) a start condition is implemented as a high to low transition of sda , while the scl is high. all serial communication mu st be preceded by a start condition. 9.1.4 stop condition (c) a stop condition is implemented as a low to high transition of sda , while the scl is high. all serial communication must be ended by a stop condition. note: when a stop condition is sent , the device w ill exit the communications window and continue with conversions. 9.1.5 data valid (d) the state of the sda line represents valid data when, after a start condition, the sda is stable for the duration of the high period of the clock signal. the data on the line must be changed during the low period of the clock signal. there is one clock pulse per bit of data. each data transfer is initiated with a start condition and terminated with a stop condition. 9.1.6 acknowledge the slave device must acknowledge (ack) after the reception of each byte. the master device must generate an extra (9th) clock pulse which is associated with this acknowledge bit. the device that acknowledges, has to pull down the sda line during the acknowledge clock pulse. note: the iqs 156 does not gene rate any acknowledge bits while it is not in its communication window. 9.2 acknowledge polling the IQS156 does not have a rdy pin, thus ack polling must be used to determine when the device is ready for communication. the device will not acknowledge du ring a conversion cycle. once a stop condition is sent by the master the device will perform the next conversion cycle. ack polling can be initiated at any time during the conversion cycle to determine if the device has entered its communication window. to perfor m ack polling the master sends a start condition followed by the control byte. if the device is still busy then no ack will b e returned. if the device has completed its cycle the device will return an ack , and the master can proceed with the next read or w rite operation (r efer to figure 9.2 ) . s t a r t c o n d i t i o n a d d r e s s o r a c k n o w l e d g e v a l i d d a t a a l l o w e d t o c h a n g e s t o p c o n d i t i o n s c l s d a ( a ) ( b ) ( d ) ( d ) ( c ) ( a )
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 6 of 24 all rights reserved. revision 1. 7 october 2012 figure 9.2 ack polling. 9.3 control byte format a control byte is the first byte received following the start condition from the master device. the control byte consists of a 7 bit device address and the read/ write indicator bit (refer to figure 9.3 ). figure 9.3 control byte format . 9.4 sub addressing each slave device on the serial bus requires a unique 7 bit device identifier. when the control byte is sent by the master the device will be able to determine if it is the intended recipient of a data transaction. the IQS156 address selection is controlled with otp fuse selection . four addresses are available, and can be programmed by usbprog. table 9.1 i 2 c sub addresses . sa1 sa0 address (7 - bit) 0 0 0x40 0 1 0x41 1 0 0x42 1 1 0x43 9.5 memory mapping address size(bytes) 00h - 0fh 16 device information r/w r 10h - 30h 32 device specific data r/w r s e n d s t a r t c o n t i n u e w i t h i 2 c o p e r a t i o n d i d d e v i c e a c k n o w l e d g e ? s e n d c o n t r o l b y t e y e s n o s l a v e a d d r e s s ( 7 b i t ) r / w l s b m s b _ _
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 7 of 24 all rights reserved. revision 1. 7 october 2012 31h - 34h 4 prox imity status bytes r/w r 35h - 38h 4 touch status bytes r/w r 39h - 3ch 4 halt bytes r/w r 3dh - 41h 4 active bytes (indicate cycle) r/w r 42h - 82 h 64 count s r/w r 83h - c3 h 64 ltas r /w
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 8 of 24 all rights reserved. revision 1. 7 october 2012 r c4 h - f d h 64 device settings r/w w 9.5.1 device information 00h product number r/w bit 7 6 5 4 3 2 1 0 11 h r 01h version number r/w bit 7 6 5 4 3 2 1 0 10 h r 9.5.2 device specific data 1 0h prox status bits r/w bit 7 6 5 4 3 2 1 0 system use system use system use np segment active low power active ati busy rf noise zoom r 9.5.3 proximity status bytes the proximity status of all the channels on the device are shown here.
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 9 of 24 all rights reserved. revision 1. 7 october 2012 31 h proximity 0 (ch0) r/w bit 7 6 5 4 3 2 1 0 show_reset ch0 r 9.5.4 touch status bytes the touch status of all the channels on the device are shown here. 35 h touch 0 ( ch1 - ch6) r/w bit 7 6 5 4 3 2 1 0 ch6 ch5 ch4 ch3 ch2 ch1 r 9.5.5 halt bytes the filter halt status of all the channels on the device are shown here. 39 h halt 0 (ch0 - ch6) r/w bit 7 6 5 4 3 2 1 0 ch6 ch5 ch4 ch3 ch2 ch1 ch0 r channel number (indicate cycle the channel number that the data in this cycles represents) 3d h chan_num r/w bit 7 6 5 4 3 2 1 0 r 9.5.6 count s the values that are available here are only the transfers from the current cycle. 42 h count r/w bit 7 6 5 4 3 2 1 0 high byte r 43 h count r/w bit 7 6 5 4 3 2 1 0 low byte r
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 10 of 24 all rights reserved. revision 1. 7 october 2012 9.5.7 long - term averages the values that are available here are only the transfers from the current cycle. 83 h long - term average r/w bit 7 6 5 4 3 2 1 0 high byte r 84 h long - term average r/w bit 7 6 5 4 3 2 1 0 low byte r 9.5.8 device settings it is attempted that the common used settings are situated closer to the top of the memory block. settings that are regarded as more ?once - off? are placed further down. c4h channel 0 compensation setting r/w bit 7 6 5 4 3 2 1 0 compensation 0 <5:0> r/w comp5:comp0 sets the compensation value for channel 0 can set the count s outside the ati routin e limit if ati off is not set . this event will trigger re - ati. c5h channel 1 compensation setting r/w bit 7 6 5 4 3 2 1 0 compensation 1 <5:0> r/w
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 11 of 24 all rights reserved. revision 1. 7 october 2012 comp5:comp0 sets the compensation value for channel 1 can set the count s outside the ati routine limit if ati off is not set. this event will trigger re - ati. c6h channel 2 compensation setting r/w bit 7 6 5 4 3 2 1 0 compensation 2 <5:0> r/w comp5:comp0 sets the compensation value for channel 2 can set the count s outside the ati routine limit if ati off is not set. this event will trigger re - ati. c7h channel 3 compensation setting r/w bit 7 6 5 4 3 2 1 0 compensation 3 <5:0> r/w comp5:comp0 sets the compensation value for channel 3 can set the count s outside the ati routine limit if ati off is not set. this event will trigger re - ati. c8h channel 4 compensation setting r/w bit 7 6 5 4 3 2 1 0 compensation 4 <5:0> r/w
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 12 of 24 all rights reserved. revision 1. 7 october 2012 comp5:comp0 sets the compensation value for channel 4 can set the count s outside the ati routine limit if ati off is not set. this event will trigger re - ati. c9h channel 5 compensation setting r/w bit 7 6 5 4 3 2 1 0 compensation 5 <5:0> r/w comp5:comp0 sets the compensation value for channel 5 can set the count s outside the ati routine limit if ati off is cah channel 6 compensation setting r/w bit 7 6 5 4 3 2 1 0 compensation 6 <5:0> r/w comp5:comp0 sets the compensation value for channel 6 can set the count s outside the ati routine limit if ati off is not set. this event will trigger re - ati. cbh channel 0 multiplier setting r/w bit 7 6 5 4 3 2 1 0 multiplier 0 < 4 :0> r/w multiplier settings registers s ets the multiplier values for each channel , which determines the sensitivity , and compensation to reach ati routine target.
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 13 of 24 all rights reserved. revision 1. 7 october 2012 mul 4 :mul 3 sensitivity multiplier mul 2 :0 compensation multiplier can set the count s outside the ati routine limit if ati off is not set. this event will trigger re - ati. cch ch1 touch threshold r/w bit 7 6 5 4 3 2 1 0 tth2 tth1 tth0 multiplier 1 <4:0> r/w cdh ch2 touch threshold r/w bit 7 6 5 4 3 2 1 0 tth2 tth1 tth0 multiplier 2 <4:0> r/w ceh ch3 touch threshold r/w bit 7 6 5 4 3 2 1 0 tth2 tth1 tth0 multiplier 3 <4:0> r/w cfh ch4 touch threshold r/w bit 7 6 5 4 3 2 1 0 tth2 tth1 tth0 multiplier 4 <4:0> r/w d0h ch5 touch threshold r/w bit 7 6 5 4 3 2 1 0 tth2 tth1 tth0 multiplier 5 <4:0> r/w
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 14 of 24 all rights reserved. revision 1. 7 october 2012 d1h ch6 touch threshold r/w bit 7 6 5 4 3 2 1 0 tth2 tth1 tth0 multiplier 6 <4:0> r/w bits selection (tth_range = 0) selection (tth_range = 1) 000 96 24 001 32 8 010 64 16 011 128 32 100 196 48 101 256 64 110 384 96 111 512 128 d2 h proximity sensitivity settings (prox_th_ch0) r/w bit 7 6 5 4 3 2 1 0 pt_5 pt_4 pt_3 pt_2 pt_1 pt_0 r/w custom value between 1 and 63 can be set with bit 5:0 to implement the proximity threshold. the default prox threshold of the IQS156 is 4. d3h touch treshold range selection bits C ch1 - ch6 ( tth_range ) r/w bit 7 6 5 4 3 2 1 0 ch6 low range ch5 low range ch4 low range ch3 low range ch2 low range ch1 low range r/w default 0 0 0 0 0 0
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 15 of 24 all rights reserved. revision 1. 7 october 2012 ch7 low range:ch0 low range select the low or normal range for touch thresholds: ?0?: low range ?1?: normal range d4h proxsense module settings 0 (prox_settings0) r/w bit 7 6 5 4 3 2 1 0 ati off partial ati base 1 base 0 r/w ati off if this bit is set, the ati routine will not be able to run : ?0?: ?1?: 0: 1: ?00?: ?01?: ?10?: ?11?: 250 d5h proxsense module settings 1 (prox_settings1) r/w bit 7 6 5 4 3 2 1 0 nd_ level nd_ on force_ halt redo_ ati reseed r/w
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 16 of 24 all rights reserved. revision 1. 7 october 2012 nd level selects the noise detect level ?0?: 25mv ?1?: 50mv nd on enables the noise detection . ?0?: disabled ?1?: enabled force halt forces the long term average to stop being calculated ?0?: lta updates normally ?1?: lta is halted redo ati forces the ati routine to run when a ?1? is written into this bit position . ati off in d4 should not be set. reseed all channels are reseeded when a ?1? is written into this bit position. the lta? s are set to 8 counts above the count s. d6h proxsense module settings 2 (prox_settings2) r/w bit 7 6 5 4 3 2 1 0 ack reset wdt off sync on halt1 halt0 lp2 lp1 lp 0 r/w
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 17 of 24 all rights reserved. revision 1. 7 october 2012 ack reset clears the reset indication flag d7h channel enable for ch0 C ch6 (chan_active) r/w bit 7 6 5 4 3 2 1 0 ch6 ch5 ch4 ch3 ch2 ch1 ch0 r/w
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 18 of 24 all rights reserved. revision 1. 7 october 2012 ch6:ch0 software enable or disable of channels : 0 = channel disabled 1 = channel enabled d8h default_comms_pointer r/w bit 7 6 5 4 3 2 1 0 default 10h (beginning of device specific data) r/w fch direct address r/w r/w bit 7 6 5 4 3 2 1 0 address location to perform direct read/write r/w fdh direct data r/w r/w bit 7 6 5 4 3 2 1 0 data to read/write r/w 10 auto tuning implementation (ati) ati is a sophisticated technology implemented in the latest generation proxsense ? devices that optimises the performance of the sensor in a wide range of applications and environmental conditions (refer to application note azd0027 - auto tuning implementation ). ati makes adjustments through external reference capacitors (as required by most other solutions) to obtain optimum performance . ati adjusts internal circuitry according to two parameters, the ati multiplier and the ati compensation. the ati multiplier can be viewed as a course adjustment and the ati compensation as a fine adjust ment. the adjustment of the ati parameters will result in variations in the count and sensitivity. sensitivity can be observed as the change in count as the result of a fixed change in sensed capacitance. the ati parameters have been chosen to provide sign ificant overlap. it may therefore be possible to select various combinations of ati multiplier and ati compensation settings to obtain the same count . the sensitivity of the various options may however be different for the same count . 10.1 automatic ati the IQS156 implements an automatic ati algorithm. this algorithm automatically adjusts the ati parameters to optimise the sensing electrode s ? connection to the device. the device will execute the ati algorithm whenever the device starts - up and when the count s are not within a predetermined range.
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 19 of 24 all rights reserved. revision 1. 7 october 2012 while the automatic ati algorithm is in progress this condition will be indicated in the streaming data and proximity and touch events cannot be detected. the device will only briefly remain in this condition and it wi ll be entered only when relatively large shifts in the count has been detected. the automatic ati function aims to maintain a constant count , regardless of the capacitance of the sense electrode (within the maximum range of the device). the effects of auto - ati on the application are the following: automatic adjustment of the device configuration and processing parameters for a wide range of pcb and application designs to maintain a n optimal configuration for proximity and touch detection. automatic tuning o f the sense electrode at start - up to optimise the sensitivity of the application. automatic re - tuning when the device detects changes in the sensing electrode s ? capacitance to accommodate a large range of changes in the environment of the application that influences the sensing electrode s . re - tuning only occurs during device operation when a relatively large sensitivity reduction is detected. this is to ensure smooth operation of the device during operation. re - tuning may temporarily influences the normal f unctioning of the device, but in most instances the effect will be hardly noticeable. shortly after the completion of the re - tuning process the sensitivity of proximity detec tion may be reduced slightly for a few seconds as internal filters stabilises . automatic ati can be implemented so effectively due to: excellent system signal to noise ratio (snr). effective digital signal processing to remove ac and other noise. the very stable core of the devices. the built in capability to accommodate a large rang e of sensing electrode capacitances . 10.2 partial ati by default (address: d 4 h bit 5 = 0) the ati routine sets the required base value of the touch channels to 250 counts the required base value for the proximity channel is specified through i 2 c commands in add ress d3h bits [1:0] and is default 200. alternatively (address: d4h bit 5 = 1) , the user can set the multiplier bits through address cbh through d1h bits [5:0] and this would determine the sensitivity , and compensation (scaled) to reach the ati target . wi th the base value set, the partial ati routine would use a convergence technique with a fixed amount of steps to reach its aimed value.
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 20 of 24 all rights reserved. revision 1. 7 october 2012 11 specifications 11.1 absolute maximum specifications the following absolute maximum parameters are specified for the device: exceeding these maximum specifications may cause damage to the device . operating temperature - 40c to 85c supply voltage (vddhi C gnd ) 5.5v maximu m pin voltage vddhi + 0.5v maximum continuous current (for specific pins) minimum pin voltage gnd - 0.5v minimum power - on slope 10 0 v/s esd protection 3 kv maximum pin temperature during soldering maximum body temperature during soldering table 11.1 iqs1 56 general operating conditions 1 description conditions parameter min typ max unit supply v oltage v ddhi 2.95 5. 50 v internal regulator o utput 2.95 v ddhi 5.0 v reg 2.35 2.5 0 2.65 v boost mode o perating current 3.3v i iqs1 56 b p 230 a normal o perating current 3.3v i iqs1 56 n p 17 a low power o perating current 3.3v i iqs1 56 l p 1 11 a low power o perating current 3.3v i iqs1 56 l p 2 9 a low power o perating current 3.3v i iqs1 56 l p 3 8 a low power o perating current 3.3v i iqs1 56 l p 4 7 a low power o perating current 3.3v i iqs1 56 l p 5 6.5 a low power o perating current 3.3v i iqs1 56 l p 6 <6 a 1 operating current figure shown here, do not include current flow through i 2 c pull up resistors.
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 21 of 24 all rights reserved. revision 1. 7 october 2012 table 11.2 start - up and shut - down slope characteristics description conditions parameter min max unit por v ddhi slope 100v/s por 0.92 2.3 v bod bod 1 1.54 v table 11.3 initial touch times description parameter min max unit bp 1 report rate 117 223 ms np report rate 126 252 ms lp6 report rate 126 2124 ms table 11.4 repetitive touch rates description conditions parameter sample rate = 5ms sample rate = 9ms unit all power modes zoom active response rate 2 > 5 > 2 touches/second the sample rate of the iqs1 56 is increased by: faster communication less data transfer 1 communication and charge frequency to comply with sample rate as reported earlier in this datasheet. 2 debounce of 3 (up and down)
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 22 of 24 all rights reserved. revision 1. 7 october 2012 12 mechanical dimensions figure 12.1 msop - 10 back view. figure 12.2 msop - 10 side view. figure 12.3 msop - 10 top view. figure 12.4 msop - 10 footprint. table 12.1 msop - 10 footprint dimensions from figure 12.4 . dimension [mm] pitch 0.50 c 4.40 y 1.45 x 0.30
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 23 of 24 all rights reserved. revision 1. 7 october 2012 13 device marking revision x = ic revision number temperature range t = i - 40 c to 85 c ( industrial ) = c 0 c to 70 c (commercial) ic configuration z = configuration (hexadecimal) date code p = package house ww = week yy = year 14 ordering information orders will be subject to a moq (minimum order quantity) of a full reel. contact the official distributor for sample quantities. a list of the distributors can be found under the di stributors section of www.azoteq.com. for large orders, azoteq can provide pre - configured devices. the part - number can be generated by using usbprog.exe or the interactive part number generator on the website. ic name IQS156 = IQS156 configuration z = sub address configuration (hexadecimal) package type ms = msop - 10 bulk packaging r = reel ( 4000pcs/reel) C moq = 4 000pcs t = tube (96pcs/tube) i q s 1 5 6 x t z p w w y y r e v i s i o n d a t e c o d e s u b a d d r e s s c o n f i g u r a t i o n t e m p e r a t u r e i q s 1 5 6 z p p b i c n a m e s u b a d d r e s s c o n f i g u r a t i o n b u l k p a c k a g i n g p a c k a g e t y p e
i q switch ? proxsense ? series copyright ? azoteq (pty) ltd 20 1 2 . IQS156 datasheet page 24 of 24 all rights reserved. revision 1. 7 october 2012 15 contact information pretoria office physical address 160 witch hazel avenue hazel court 1, 1 st floor highveld techno park centurion, gauteng republic of south africa tel: +27 12 665 2880 fax: +27 12 665 2883 postal address po box 16767 lyttelton 0140 republic of south africa paarl office physical address 109 main street paarl 7646 western cape republic of south africa tel: +27 21 863 0033 fax: +27 21 863 1512 postal address po box 3534 paarl 7620 republic of south africa the following patents relate to the device or usage of the device: us 6,249,089 b1, us 6,621,225 b2, us 6,650,066 b2, us 6,952,084 b2, us 6,984,900 b1, us 7,084,526 b2, us 7,084,531 b2, us 7,119,459 b2, us 7,265,494 b2, us 7,291,940 b2, us 7,329,970 b2, us 7,336,037 b2, us 7,443,101 b2, us 7,466,040 b2, us 7,4 98,749 b2, us 7,528,508 b2, us 7,755,219 b2, us7,772,781, us 7,781,980 b2, ep 1 120 018 b1, ep 1 206 168 b1, ep 1 308 913 b1, ep 1 530 178 b1, zl 99 8 14357.x, aus 761094 iq switch?, proxsense?, lightsense?, airbutton? and the iq logo are trademarks of azo teq. the information appearing in this datasheet is believed to be accurate at the time of publication. however, azoteq assumes no responsibility arising from the use of the specifications described. the applications mentioned herein are used solely for t he purpose of illustration and azoteq makes no warranty or representation that such applications will be suitable without further modification, no r recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. azoteq products are not authorized for use as critical components in life support devices or systems. no licenses to patents are granted, implicitly or otherwise, under any intellectual property rights. azoteq reserves the right to alter its products without prior notification. for the most up - to - date information, please refer to www.azoteq.com . www.azoteq.com proxsensesupport@azoteq .com
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