TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) TS02N SPECIFICATION V2.0 TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) 1 Specification 1.1 General Feature 2-Channel capacitive touch sensor embedded self sensitivity calibration Low power consumption Sync function for parallel operation Adjustable sense frequency by RB resister Open-drain digital output Embedded noise elimination circuit Embedded Internal power reset circuit 1.2 Application Home application (White goods, blue goods etc) Membrane switch replacement Human interface for toys & interactive games Sealed control panels, keypads 密封的 1.3 Package (8 SOP) Fig.1 TS02N 8SOP (Drawings not to scale) 1 TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) 2 Pin Description (8 SOP) PIN Number Name I/O 1 SYNC Analog Input 2 3 4 5 6 R_BIAS GND CS1 CS2 VDD Analog Input Ground Analog Input Analog Input Power 7 OUT2 Digital Output 8 OUT1 Digital Output Description Self sense operation signal output Peripheral sense operation signal input Internal bias adjust input Supply ground Sense channel 1 Sense channel 2 Power (2.5V ~ 5.0V) Ch2 touch detect output Open drain output (Active Low) Ch1 touch detect output Open drain output (Active Low) Protection VDD/GND VDD/GND VDD VDD/GND VDD/GND GND VDD/GND VDD/GND 3 Absolute Maximum Rating Supply voltage Maximum voltage on any pin Maximum current on any PAD Power Dissipation Storage Temperature Operating Temperature Junction Temperature Characteristics Symbol Supply Voltage VDD Current consumption ID_MAX Power dissipation PD 3.1 3.2 5.0V VDD+0.3 V 100mA 800mW -50 ~ 150℃ -20 ~ 75℃ 150℃ Test Condition -20℃ < Ta < +75℃, VDD = 3.3V -20 ~ 75℃, VDD = 5V Min 2.5 - Typ 3.3 - Max 5.0 180 800 Units V ㎂ ㎽ ESD Characteristics Mode Polarity H.B.M Pos / Neg M.M Pos / Neg C.D.M Pos / Neg Max 2000V 2000V 2000V 200V 200V 200V 800V Reference VDD VSS P to P VDD VSS P to P DIRECT Max 200mA -200mA 8.0V Test Step Latch-up Characteristics Mode I Test V supply over 5.0V Polarity Positive Negative Positive 25mA 1.0V 3 TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) 4 Electrical Characteristics ▪ VDD=3.3V, RB =510k, (Unless otherwise noted), TA = 25℃ Characteristics Symbol Operating supply voltage VDD Current consumption IDD Output maximum sink current IOUT Input capacitance range Note1 ΔC Output impedance (open drain) Zo Self calibration time TCAL Burst sense oscillation period TP Note2 Min Typ Max Units 2.5 3.3 5.0 V VDD= 3.3V RB=510k slow mode - 50 70 ㎂ TA = 25℃ - - 4.0 ㎃ - 4.0 100 ㎊ CS = 4pF - 0.1 - ㎊ ΔC > 0.1pF - 12 - ΔC < 0.1pF - 30M - After reset VDD = 3.3V RB = 510k - 200 - BF(Burst Fast) mode - 10 - BS(Burst Slow) mode - 80 - 200 510 820 kΩ - 50 - uA - 2.6 - V - 0.6 - V CS Minimum detective capacitance difference Bias Resistance Range Test Condition RB Sync pin output source ISYNC VDD= 3.3V RB=510k current Sync pin high threshold VH VDD= 3.3V voltage Sync pin low threshold VL VDD= 3.3V voltage Note 1 : Sensitivity cab be raised with lower CS value Note 2 : Lower RB is recommended in noisy condition. Ω ms ms TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) 5 Implementation of TS02N 5.1 R_BIAS implementation VDD C100 R_BIAS << R100 决定 R_BIAS is connecting to the resistor to decide the oscillator and internal bias current. The sensing frequency, internal clock frequency and current consumption are therefore able to be adjustable with R100. Voltage ripple on R_BIAS can make critical internal error, so C100 connected to the VDD recommended. (Typical Value of C100 is 1nF) Table1. Frequency & IDD @ 25 ℃ Condition SLOW MODE VDD [V] R100 [kOhm] Current Consumption [uA] 5.0 510 110 3.3 510 50 2.5 510 35 TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) 5.2 CS implementation R220 CS2 << Touch PAD C220 CS1 << R210 Touch PAD C210 彼此，相互 调解、仲裁 n，决议、决定、果 断、决心 Parallel capacitor C220 is added to CS2 and C210 to CS1 to adjust the sensitivity of initial touch detect condition. The sensitivity will be increased when C220 and C210 value are smaller. It could be useful in case of detail sensitivity mediation is required. The TS02N has two independent touch sensor input CS1 and 影响, CS2. Internal 改变 touch decision processes of CS1 and CS2 are separated from each other. Therefore two channel touch key board can be designed by using only one TS02N. R210 and R220 are serial connection resistors to avoid mal-function from external surge and ESD. From 200Ω to 1kΩ is recommended for R210 and R220 values. The size and shape of PAD might be an influence on the sensitivity. The sensitivity will be increased when the larger PAD is used because the frequency variation caused by touch PAD. The connection line of CS1 and CS2 to touch PAD is recommended to be routed as short as possible to prevent from abnormal touch detect caused by connection line. 变更, 变化, 变异, 变种 5.3 SYNC implementation Over two TS02N can be working 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. The R400 is pull-down resistor of SYNC pin. Too much big value of R400 makes the SYNC pulse falling delay, and too much small value of R400 makes rising delay. About 20MΩ is recommended for R400 value. The Sync pin should be implemented as below for this. TS02N also can be used with the other TSxx series by employing this SYNC function. 6 TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) SYNC << 1st TS02N R400 ※ R400 = 20MΩ SYNC << 2nd TS02N or TS** Table2. SYNC pin option Connection R400 Connection Operation Normal SYNC operation with the other TSXX series / High Sensitivity Application GND No SYNC / Low Sensitivity Application VDD Forbidden 禁止, 不许 5.4 OUTPUT implementation VDD R520 R510 OUT2 << OUTPUT2 OUT1 << OUTPUT1 The OUT1 and OUT2 are an open drain structure. For this reason the connection of pull-up resistor R510 and R520 are required between OUT1, OUT2 and VDD. The reset value of OUT1 and OUT2 is high, and the value is low during a touch is detected on CS1 or CS2. Over few kΩ resistors are recommended as R510 and R520. TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) 6 Recommended Circuit (Example) Two channel touch key board can be designed by using only one TS02N. The TS02N is embedded intelligent internal power reset circuit that makes possible to save circuit cost because of reducing external components for reset. The sensitivity calibration operation can help to prevent abnormal detection caused by external noise, temperature variation, and supply voltage drop. Fig.2 TS02N Application Example Circuit 8 n. 标度, 刻度, 校准 TS02N (2-CH Sensitivity Calibration Capacitive Touch Sensor) 7 MECHANICAL DRAWING Recommended Soldering Profiles Wave Soldering Ramp Up ( C/sec ) Solder Temperature Dwell Time Ramp Down Recommended Maximum Maximum Recommended IR Convection / Vapor Phase Reflow – Surface Mount Convection / IR Ramp Up ( C/sec ) Recommended 2 C/sec Solder Temperature Maximum 220 C Dwell Time Maximum 15 seconds Ramp Down Recommended 2 C/sec Wave Solder 4 C/sec 235 C 3 seconds 4 C/sec Vapor Phase 2 C/sec 215 C 60 seconds 2 C/sec 9 LIFE SUPPORT POLICY touchSEMI PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES NOR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF THE EPSILLON COMPANY. touchSEMI IS MEMBER OF EPSILLON COMPANY. touchSEMI Sales Office Tel.: (+420) 284 861 438 GSM: (+420) 737 579 521 Fax: (+420) 284 862 414 www.touchsemi.com P.O. 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