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specification v2.4 TS01S 1-ch differential sensitivity calib ration capacitive touch sensor februar y 2008 www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 1/12 1 specification 1.1 general features 1-channel capacitive touch senso r with differential sensitivit y calibration low power consumption uniformly adjustable sensitivity sync function for parallel operation three steps sensitivity availab le without external component open-drain digital output internal power on reset embedded common and normal noise elimination circuit rohs compliant sot-26 package 1.2 application home appliance mobile application (pmp, navigation, mp3 etc) membrane switch replacement human interface for toys & interactive games sealed control panels, keypads 1.3 package (sot-26) TS01S sot-26 (drawings not to scale) www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 2/12 2 pin description (sot-26) pin number name i/o description protection 1 output digital output touch detect output vdd/gnd 2 vdd power power (2.5v ~ 5.0v) gnd 3 sync analog input/output self operation signal output peripheral operation signal input sensitivity selection input [ note1] vdd/gnd 4 cs analog input capacitive sensor input vdd/gnd 5 gnd ground supply ground vdd 6 cr analog input reference capacitive sensor input for differential sensitivity calibration vdd/gnd note1 : refer to chapter 6.3, 6.4 sync implementation 3 absolute maximum rating supply voltage 5.5 v maximum voltage on any pin vdd+0.3 v maximum current on any pad 100ma continuous power dissipation 200mw storage temperature -50 ~ 150 operating temperature -20 ~ 75 junction temperature 150 note2 : unless any other command is noted, all above are operated in no rmal temperature. 4 esd & latch-up characteristics 4.1 esd characteristics mode polarity minimum level reference 8000v vdd 8000v vss h.b.m pos / neg 8000v p to p 500v vdd 500v vss m.m pos / neg 500v p to p c.d.m pos / neg 800v direct 4.2 latch-up characteristics mode polarity minimum level test step positive 25ma ~ 100ma i test negative -25ma ~ -100ma 25ma v supply over 5.0v positive 1v ~ 7.5v 0.5v www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 3/12 5 electrical characteristics ? v dd =3.3v (unless otherwise noted), t a = 25 characteristics symbol test condition min typ max units operating supply voltage v dd 2.5 3.3 5.0 v v dd = 3.3v - 25 40 current consumption i dd v dd = 5.0v - 40 70 ? output maximum sink current i out t a = 25 - - 4.0 ? internal reset criterion v dd voltage v dd_rst t a = 25 - - 0.3 ? v dd v sense input capacitance range [note3] c s - 10 100 reference input capacitance range [note4] c r - 12 100 ? sense input resistance range r s - 200 1000 minimum detectable capacitance variation c s c s = 10pf 0.2 - - ? c s > 0.2pf - 12 - output impedance (open drain) zo c s < 0.2pf - 30m - self calibration time after v dd setting t cal - 200 - ms maximum supply voltage rising time t r_vdd - - 100 ms recommended sync resistance range r sync 1 2 20 m note 3: the sensitivity can be increased with lower c s value. the recommended value of c s is 10pf when using 3t pc(poly carbonate) cover and 10 L x 7 L touch pattern and m iddle sensitivity selection. note 4: c r value is recommended as same that of c s_tot as possible for effective differential sensitivity calibration. c s_tot = c s + c para (c para is parasitic capacitance of cs pin) if proper cr capacitor value is used, cr pin has almost same f requency as that of cs pin. www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 4/12 6 TS01S implementation 6.1 current consumption TS01S uses internal bias circuit, so internal clock frequency a nd current consumption is not adjusted. the typical current consumption curve of TS01S is rep resented in accordance with v dd voltage as below. the higher v dd requires more current consumption. internal bias circuit can make t he circuit design simple and re duce external components. 15 20 25 30 35 40 45 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 v dd [v] i dd [ua] typical current consumption curve of TS01S www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 5/12 6.2 cs and cr implementation the parallel capacitor c s is added to cs and c r to cr to adjust fine sensitivity. the major factor of the sensitivity is c s . the sensitivity would be increased when smaller c s value is used. (ref. below sensitivity ex ample figure) the c r value should be almost the same as the total cs capacitance (c s_tot ) for effective differential sensitivity calibration. the total cs capacitance is composed of c s which is set for optimal sensitivity and parasitic capacitance of cs pattern (c para ). the parasitic capacitance of cs pattern is about 2pf if norm al touch pattern size is used. but in the case of usi ng larger touch pattern, c para is bigger than normal value. the r s is serial connection resistor to avoid malfunction from extern al surge and esd. (it might be optional.) from 200 to 1k is recommended for r s . the size and shape of touch pad might have influence on the sensitivity. the sensitivity will b e optimal when the size of pad is approximately an half of the first knuckle (its about 10 L 7 L) . the connection line of cs to the touch pad is recommended to be routed as short as possible to prevent from abnormal touch detection caused by connection line. sensitivity example figure of ts 01s (when normal sensitivity se lection selected) cs << touch pad c s r s cr << c r www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 6/12 6.3 sync implementation from two TS01S to ten TS01S (or other ts series touch sensor) c an work on the one application at the same time thanks to sync function with this pin. the sync pulse prevents over two sensing signal from interfering with each other. durin g the sense disenable period and sync input becomes high, internal clock is suspended. the r sync is pull-down resistor of sync pin. too big value of r sync makes the sync pulse falling delay, and too small value of r sync makes rising delay. the typical value of r sync is 2m. TS01S has high sensitivity when sync is implemented as above fi gure (connect r sync between sync and gnd). 6.4 sync implementation for sensitivity selection. another function of sync pin of TS01S is the selection of sensi tivity without any additional external component. the sync imp lementation for sensitivity sel ection is informed as below chart. sync connection using r sync connection connected to vdd connected to gnd sensitivity high middle low sync << vdd s y nc connection for middle sensitivit y sync << s y nc connection for low sensitivit y sync << sync << r sync 1 st TS01S 2 nd TS01S or ts** www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 7/12 6.5 output implementation the out is an open drain structure. for this reason, the connec tion of pull-up resistor r out is required between out and vdd or another lower voltage node. whe n r out is connected to higher voltage node than vdd, the output current passes through protection diode to vdd and abnormal operation may be occurred. the maximum output sink current is 4ma, so over a few k must b e used as r out . normally 10k is used as r out . the out is high in normal situation, and the value is low whe n a touch is detected on cs. 6.6 internal reset operation the TS01S has stable internal reset circuit that offers reset p ulse to digital block. the supply voltage for a system start or restart should be under 0.3 ? v dd of normal operation v dd . no external components required for TS01S power reset, thus it hel ps simple circuit design and minimize the cost of application. ? caution: the v dd rising time should be less then 100ms for proper power on rese t. out >> r out output vdd www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 8/12 7 recommended circuit diagram 7.1 apllication example the capacitor and resistor might be connected with cs (pin4) for getting a stable sensitivity. the capacitor value which is connected to cr pin (c r ) should be almost the same as the total cs capacitance (include parasitic capacitance) for an eff ective differential sensitivity calibration. TS01S is reset by internal reset circuit. vdd voltage rising time should be shorter than 100msec for proper operation. the sensitivity can be adjusted through a connection of sync pin. (refer to chapter 6.4) from two TS01S to ten TS01S (or other ts series touch sensor) c an work on the one application at the same time thanks to sync function. (refer to chapter 6.3) TS01S out port has an open drain structure. the pull-up resistor should therefore be needed as above figure. vdd periodic voltage ripples over 50mv or the ripple frequency which is lower than 10 khz it can cause wrong sensitivity calibration. to prevent above problem, power (vdd, gnd) line of touch circuit should be separated from the other circuit. especially the led driver power line or digital switching circuit power line should be certainly treated to be separated from touch circuit. the c s pattern should be routed as short as possible and the width of the line should be around 0.25mm. the c s pattern routing should be formed by bottom metal (opposite metal of touch pad). the capacitor which is between vdd and gnd is an obligation. it should be placed as close as possible from TS01S. the empty space of pcb must be filled with gnd pattern to strengthen gnd pattern and to prevent external noise that causes interference with the sensing frequency. www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 9/12 7.2 example - power line split strategy a. not split power line (bad power line design) the noise that is generated by ac load or relay can be loaded at vdd power line. a big inductance might be appeared in case of the connection line between main board and display board is too long, moreover the voltage ripple could be generated by led (lcd) display driver at vdd. b. split power line (one 5v regulator used) ? recommended c. split power line (separated 5v regulator used) ? strongly recommended www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 10 / 12 8 package description 8.1 mechanical drawing www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 11 / 12 note: 1. dimensions and tolerances are as per ansi y14.5, 1982. 2. package surface to be matte finish vdi 11 ~ 13. 3. die is facing up for mold. die is facing down for trim/form, ie. reverse trim/form. 4. the footlength measuring is based on the gauge plane method. 5. dimension is exclusive of mold flash and gate burr. 6. dimension is exclusive of solder plating. 7. all dimensions are mm. 8.2 marking description s y ww year code p r s t u v w x y z production year 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 week code year code touch switch group www.datasheet.co.kr datasheet pdf - http://www..net/
adsemiconductor ? TS01S (1-ch differential sensitivity calib ration capacitive touch sensor) adsemiconductor confidential 12 / 12 notes: life support policy ad semiconductor?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ad semiconductor corporation the ads logo is a registered trademark of adsemiconductor ? 2006 adsemiconductor C all rights reserved www.adsemicon.com www.adsemicon.co.kr www.datasheet.co.kr datasheet pdf - http://www..net/

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