STK3410规格书.pdf

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1、 STK3410 Ambient Light Sensor?Proximity Sensor and 1D-gesture sensor with Built-in IR LED Datasheet Version-1.5 2014/05/02 义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensortek Technology Corp.1 1.OVERVIEW Description The STK3410 is an integrated ambient and infrared l

2、ight to digital converter with a built-in IR LED and I2C interface.This device provides not only ambient light sensing to allow robust backlight/display brightness control but also infrared sensing to allow proximity estimation and gesture recognition featured with interrupt function.For ambient lig

3、ht sensing,the STK3410 incorporates a photodiode,timing controller and ADC in a single chip.The excellent spectral response is designed to be close-to human eye.The STK3410 is suitable for detecting a wide range of light intensity environment.The maximum detecting light intensity is 1.7K Lux when us

4、ing default setting.For proximity sensing,the STK3410 also incorporates a photodiode,timing controller and ADC in the same chip.The spectral response of STK3410 is optimized for wavelength 940nm infrared light.The STK3410 provides programmable duty setting to drive IR LED and employs a noise cancell

5、ation scheme to highly reject unwanted ambient IR noise.For gesture recognition,the STK3410 provides multi-photodiodes to distinguish the movement of the object.It can be used to recognize one dimensions gesture recognition:left/right.The STK3410 has excellent temperature compensation,robust on-chip

6、 refresh rate setting without external components.Software shutdown mode control is provided for power saving application.The STK3410 operating voltage range is 1.7V to 3.6V.Feature?Integrated ambient light sensor,proximity sensor and infrared LED in one package.Proximity Sensor?16 bits resolution f

7、or proximity detection?Built-in LED driver with flexible setting LED turn-on time:16 steps IT x 64 duty cycle options LED current:12.5/25/50/100 mA?Flexible interrupt setting Several interrupt modes meet application requirements.Flag modes are included.Interrupt persistence:1/4 times?Low noise desig

8、n?Ambient IR noise cancellation Immunity to 50Hz/60Hz fluorescent light flicker?940nm LED for STK3410.Ambient Light Sensor?Convert ambient light intensity to 16-bit digital data format?3rd generation ambient light sensor which closes to human-eye response and suppress IR portion Read the Illuminance

9、 directly;unlike conventional solution calculated from two diodes data?Flexible digital settings Integration time:0.2ms6400ms?Flexible interrupt setting Interrupt while out-of-window Persistence:1/4 times?Maximum detecting ambient light intensity:1.7 K Lux when using default setting.?IR sensing mode

10、 Gesture?1-D gesture recognition,left/right.?Background noise cancellation General?Fully digital control with I2C interface 1.7 3.6V I2C interface?Low power design Standby mode Wait mode?Time-multiplexing for sensing?VDD wide operation voltage:1.73.6V?Excellent temperature compensation:-40 to 85 C?P

11、ackage:3.94x2.36x1.35(mm)?Lead-free package(RoHS compliant)Applications?Mobile Phone,Smart-phone,PDA 义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensortek Technology Corp.2 2.FUNCTION BLOCK T-CONI2C Interface 义嘉有限公司 0 7 55-8 948 6

12、 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensortek Technology Corp.3 3.PINOUT DIAGRAM 14325678STK3410RightLeftDetectorIR Emitter Top View 4.PIN DESCRIPTION Pin No.Pin Name Dir.Pin Function 1 SDA B I2C serial data line.(Open Drain)2/INT O Interrupt

13、pin,LO for interrupt alarming.(Open Drain)3 LDR I IR LED driver pin connecting to the cathode of the external IR LED.The sink current of the IR LED driver can be programmed through I2C or the external resistor.4 NC No Connect.5 LEDA I Anode of the embedded IR LED,connect to power.6 GND GND Ground.Th

14、e thermal pad is also connected to the GND pin.7 SCL I I2C serial clock line.8 VDD PWR Power supply:1.7V to 3.6V.Direction denotation:O Output GND Ground I Input B Bi-direction PWR Power NC Not Connect 义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw

15、 copyright 2013 Sensortek Technology Corp.4 5.ELECTRICAL SPECIFICATIONS Absolute Maximum Ratings Symbol Parameter Min.Typ.Max.Unit VDD Supply voltage -0.3 3.8 V VLEDA Voltage of LEDs anode-0.3 4.7 V VLDR Voltage of LDR 3.8 V Ta Operation temperature-40 85 C Ts Storage temperature-40 85 C NOTE:All vo

16、ltages are measured with respect to GND Recommended Operating Conditions Symbol Parameter Min.Typ.Max.Unit VDD Supply voltage 1.7 3.6 V VLEDA Voltage of LEDs anode 2.4 4.6 V fI2C Clock frequency of I2C 400 KHz Ta Operation temperature-40 85 C NOTE:All voltages are measured with respect to GND Symbol

17、 Parameter Max.Unit 2(HBM)kV 200(MM)V ESD Electrostatic discharge protection 100(Latch Up)mA NOTE:All voltages are measured with respect to GND 5 5.1 1 E El le ec ct tr ri ic ca al l a an nd d OOp pt ti ic ca al l C Ch ha ar ra ac ct te er ri is st ti ic cs s VDD=VLED=2.8V,under room temperature 25

18、C(unl ess otherwise noted)Symbol Parameter Condition Min.Typ.Max.Unit Operation Characteristics IALS ALS only supply current Note1,2 90 A IPS PS/GS only supply current Note1,2 100 A IWAIT Supply current at wait state Note1,2 29 A ISD Shutdown current Note1,2 0.2 1 A VIH Logic high,I2C Note6 1.3 VDD

19、V VIL Logic low,I2C Note7 0.4 V ALS Characteristics p1 Peak sensitivity wavelength for ALS 550 nm ALSFSCNT Full scale ALS counts 65535 counts ALSDARK ALS dark offset Note2,3,4 0 3 counts ALSSENSE ALS sensing tolerance Note2,3 10%Detecting intensity for ALS Note2,3 0.027(1 count)1.769K(65535 counts)L

20、ux 义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensortek Technology Corp.5 Proximity Characteristics p2 High sensitivity wavelength range for PS/GS 800 1000 nm PS/GSFSCNT Full scale PS/GS counts 65535 counts PSCOUNT PS counts Note

21、2,8 476 560 644 counts IRDR_LED1:0 Note5 00 12.5 mA 01 25 mA 10 50 mA ILEDSINK LED sink current 11 100 mA LEDDUTY LED duty adjust steps 64 steps Note 1 :No LED operation.Note 2 :GAIN_ALS1:0=2b11,.IT_ALS3:0=4b1001,GAIN_PS/GS1:0=2b11,IT_PS/GS3:0=4b0001.Note 3 :White LED parallel light source.Note 4 :E

22、ambient=0 Lux.Note 5 :The voltage of LDR pin is fixed at 1V.Note 6 :I2C logical high voltage level is specified as worst-case condition when all of the recommended operation supply voltages(VDD)are taken into consideration.The logical high level is different when different supply voltage is applied.

23、Note 7 :I2C logical low voltage level is specified as worst-case condition when all of the recommended operation supply voltages(VDD)are taken into consideration.The logical low level is different when different supply voltage is applied.Note 8 :18%gray card as reflector 30mm distance and no glass o

24、r apertures above the module.5 5.2 2 T Ti immi in ng g C Ch ha ar rt t Characteristics of the SDA and SCL I/O Standard Mode Fast Mode Symbol Parameter Min.Max.Min.Max.Unit fSCLK SCL clock frequency 10 100 10 400 KHz tHDSTA Hold time after(repeated)start condition.After this period,the first clock is

25、 generated 4.0 0.6 s tLOW LOW period of the SCL clock 4.7 1.3 s tHIGH HIGH period of the SCL clock 4.0 0.6 s tSUSTA Set-up time for a repeated START condition 4.7 0.6 s tHDDAT Data hold time 0 0 ns tSUDAT Data set-up time 250 100 ns tr Rise time of both SDA and SCL signals 1000 300 ns tf Fall time o

26、f both SDA and SCL signals 300 300 ns tSUSTO Set-up time for STOP condition 4.0 0.6 s tBUF Bus free time between a STOP and START condition 4.7 1.3 s Note 1:fSCLK is the(tSCLK)-1.义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensort

27、ek Technology Corp.6 Timing Chart of the SDA and SCL Write Command Read Data Sequential Read Data 义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensortek Technology Corp.7 6.PRINPICLE OF OPERATION Digital Interface STK3410 contains

28、eight-bit registers accessed via the I2C bus.All operations can be controlled by the command register.The simple command structure makes user easy to program the operation setting and latch the output data from STK3410.Section 6.2 Timing chart displays the STK3410 I2C command format for reading and

29、writing operation between host and STK3410.6 6.1 1 GGe en ne er ra al l OOp pe er ra at ti io on ns s Slave Address STK3410 provides fixed I2C slave address of 0 x48 using 7 bit addressing protocol.Slave Address R/W Command Bit OPERATION 0 Write Command to STK3410 0 x48(followed by the R/W bit)1 Rea

30、d Data form STK3410 Function Description There are 19 registers available in the STK3410.Their functions are summarized in the following table.BIT ADDR REG NAME 7 6 5 4 3 2 1 0 Default 00h STATE EN_IRS EN_AK EN_ASO EN_IRO EN_WAIT EN_ALS EN_PS/GS 00h 01h PS/GSCTRL PRS_PS/GS1:0 GAIN_PS/GS1:0 IT_PS/GS3

31、:0 31h 02h ALSCTRL PRS_ALS1:0 GAIN_ALS1:0 IT_ALS3:0 39h 03h LEDCTRL IRDR_LED1:0 DT_LED5:0 FFh 04h INT INT_CTRL INT_OUI INT_ALS INT_PS2:0 00h 05h WAIT WAIT7:0 00h 06h THDH1_PS THDH_PS15:8 FFh 07h THDH2_PS THDH_PS7:0 FFh 08h THDL1_PS THDL_PS15:8 00h 09h THDL2_PS THDL_PS7:0 00h 0Ah THDH1_ALS THDH_ALS15

32、:8 FFh 0Bh THDH2_ALS THDH_ALS7:0 FFh 0Ch THDL1_ALS THDL_ ALS15:8 00h 0Dh THDL2_ALS THDL_ ALS7:0 00h 10h FLAG FLG_ALSDR FLG_PS/GSDR FLG_ALSINT FLG_PSINT FLG_OUI FLG_IR_RDY FLG_NF 01h 11h DATA1_PS DATA_PS15:8 00h 12h DATA2_PS DATA_PS7:0 00h 13h DATA1_ALS DATA_ALS15:8 00h 14h DATA2_ALS DATA_ALS7:0 00h

33、15h DATA1_OFFSET DATA_OFFSET15:8 00h 16h DATA2_OFFSET DATA_OFFSET7:0 00h 17h DATA1_IR DATA_IR15:8 00h 18h DATA2_IR DATA_ IR7:0 00h 24h DATA1_GS0 DATA_GS015:8 00h 25h DATA2_GS0 DATA_GS17:0 00h 义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright

34、 2013 Sensortek Technology Corp.8 26h DATA1_GS1 DATA_GS015:8 00h 27h DATA2_GS1 DATA_GS17:0 00h 3Eh PDT_ID PDT_ID7:0 TBD 3Fh Reserved Reserved 80h SOFT_RESET Write to soft reset STATE Register(00h)1.EN_PS/GS(Bit0),EN_ALS(Bit1),EN_WAIT(Bit2):These bits are used to define what state for the device to b

35、e.The operation state flow will be stated later.BIT 2:0 Description 000 Standby 001 No Wait Time,Disable ALS,Enable PS/GS 010 No Wait Time,Enable ALS,Disable PS/GS 011 No Wait Time,Enable ALS,Enable PS/GS 100 Not Applied 101 Set Wait Time,Disable ALS,Enable PS/GS 110 Set Wait Time,Enable ALS,Disable

36、 PS/GS 111 Set Wait Time,Enable ALS,Enable PS/GS 2.EN_IRO(Bit4):To enable(1)/disable(0)Interrupt Run Once function while Interrupt Run Once will be stated in the later section.3.EN_ASO(Bit5):To enable(1)/disable(0)PS DATA stored in register 11h/12h is the result that ADC output subtract offset data

37、stored in register 15h/16h.This is used to cancel the system cross talk(offset).ex:DATA_PS15:0=DATA_PS_ADC DATA_OFFSET15:0 where DATA_PS_ADC is the ADC output while PS conversion is completed.4.EN_AK(Bit6):Reserved.5.EN_IRS(Bit7):To enable(1)/disable(0)IR sensing function.It will update DATA_IR15:0(

38、register 17h/18h)once and set FLG_IR_RDY to 1.The IR sensing function is a one-time measurement.If another measure is needed,EN_IRS shall be disabled first and enable.IR sensing and FLG_IR_RDY will be stated in the later section.PS/GSCTRL Register(01h)1.IT_PS/GS3:0(Bit3:0):The refresh time of PS/GS

39、can be tuned by IT_PS/GS3:0.Through setting IT_PS/GS3:0,user could achieve very wide range flexibly in choosing refresh time for different application demand.It is suggested to choose IT_PS/GS time less than 1.56ms to minimize the influence coming from flicker noise.STK3410 takes 2 times of IT_PS/GS

40、 to perform proximity sensing.The default value of IT_PS/GS is 0.37ms.BIT 3:0 REFRESH TIME Multiple of Base Refresh Time 0000 0.185 ms(Base Refresh Time)x 1 0001 0.37 ms x 2 0010 0.741 ms x 4.1111 6070 ms x 32768 2.GAIN_PS/GS1:0(Bit5:4):The Gain setting for PS/GS sensitivity range is summarized in f

41、ollowing table.It is suggested to choose x64 gain setting to get the optimum performance.The default value of GAIN_PS/GS is x64.义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensortek Technology Corp.9 BIT 5:4 Gain 00 x1 01 x4 10 x1

42、6 11 x64 3.PRS_PS1:0(Bit7:6):The PS has an interrupt persistence filter.The persistence filter allows user to specify the number of consecutive out-of-threshold PS occurrences before an interrupt is triggered.BIT 7:6 Consecutive Out-of-threshold PS Occurrences 00 1 time 01 4 times ALSCTRL Register(0

43、2h)1.IT_ALS3:0(Bit3:0):The refresh time of ALS can be tuned by IT_ALS.Through setting IT_ALS,user could achieve very wide range flexibly in choosing refresh time for different application demand.The default value of IT_ALS is 94.85ms.(IT_ALS3:0=4b1001)BIT 3:0 REFRESH TIME Multiple of Base Refresh Ti

44、me LUX/LSB under GAIN_ALS=2b11 0000 0.185 ms x 1.0001 0.37 ms x 2.0010 0.741 ms x 4 0.027/2(IT_ALS3:0-9).1000 47.36 ms x 256 0.054 1001 94.85 ms x 512 0.027 1010 189.44 ms x 1024 0.0135.1111 6062 ms x 32768.2.GAIN_ALS1:0(Bit5:4):The Gain setting for ALS sensitivity range is summarized in following t

45、able.It is suggested to choose x64 gain setting to get the optimum performance.The default value of GAIN_ALS is x64.BIT 5:4 Gain LUX/LSB under IT_ALS=4b1001 00 x1 1.728 01 x4 0.432 10 x16 0.108 11 x64 0.027 3.PRS_ALS1:0(Bit7:6):The ALS has an interrupt persistence filter.The persistence filter allow

46、s user to specify the number of consecutive out-of-threshold ALS occurrences before an interrupt is triggered.BIT 7:6 Consecutive Out-of-threshold ALS Occurrences 00 1 time 01 4 times LEDCTRL Register(03h)1.DT_LED5:0(Bit5:0):IRLED driving ON-duty(with respect to refresh time)could be adjusted throug

47、h DT_LED.Through setting DT_LED,IRLED ON-duty period can vary from 1/64 to 64/64 of the set IT_PS/GS time.For the following example table,when the IT_PS/GS3:0=4b0000(PS/GS refresh time is 0.185ms),user may set 义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV

48、 1.5 .tw copyright 2013 Sensortek Technology Corp.10the IRLED ON-duty period 1/64 of 0.185ms(=2.89us)by defining DT_LED5:0=6b000000.By following this,user can choose the desired LED ON-duty period for STK3410.BIT 5:0 IRLED ON-Duty Period IRLED ON-Duty Period under IT_PS/GS=0000 000000 IT_PS/GS X 1/6

49、4 2.89 us 000001 IT_PS/GS X 2/64 5.78 us.111111 IT_PS/GS X 64/64 0.185 ms 2.IRDR1:0(Bit7:6):The STK3410 provides different driving ability for IRLED through setting IRDR.BIT 7:6 IRLED Driving Current 00 12.5mA current sink 01 25mA current sink 10 50mA current sink 11 100mA current sink 义嘉有限公司 0 7 55

50、-8 948 6 115 免费提供样件 深圳批量现货义嘉有限公司 0 7 55-8 948 6 115 免费提供样件 深圳批量现货 STK3410 REV 1.5 .tw copyright 2013 Sensortek Technology Corp.11 System Operation State Normal Mode The STK3410 provides control of ALS,proximity detection,and power management functionality through an internal state machine.After a po