STK8313规格书.pdf

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1、 STK8313 Digital Output 3-axis MEMS Accelerometer Preliminary Datasheet Version-0.9.7 2012/12/13 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 STK8313 REV 0.9.7 .tw copyright 2013 Sensortek Technology Corp.11.OVERVIEW Description The STK8313 is a 2g/4g/8g/16g,3-axis linear accelerometer,with I2C digital o

2、utput.It is a very low power,low profile capacitive MEMS sensor featuring,compensation for 0g offset and gain errors,and conversion to 12-bit digital values at a user configurable samples per second.The self-test capability allows the user to check the functioning of the sensor in the final applicat

3、ion.The device can be arranged for sensor data changes,orientation,tap/double tap,and free fall functions through two interrupt pins.The STK8313 is available in a small 3mm x 3mm x 0.85mm QFN package and it is guaranteed to operate over an extended temperature range from-40 C to+85 C.Feature?Low Vol

4、tage Operation:Analog Voltage:2.4 V 3.6 V Digital Voltage:1.7 V 3.6 V?2g/4g/8g/16g dynamically selectable full-scale?I2C digital output interface and 2 interrupt?12 bit data output?Embedded self-test?10000 g high shock survivability?3mm x 3mm x 0.85mm QFN Package?Configurable Samples per Second from

5、 3.125 to 400 samples a second.?Auto-Wake/Sleep Feature for Low Power Consumption?Tilt Orientation Detection for Portrait/Landscape Capability?Shake Detection?Tap and double Tap Detection?Free Fall Detection?RoHS Compliant?Halogen Free?Environmentally Preferred Product Applications?Free-fall detecti

6、on?Intelligent power saving for handheld devices?Pedometer?Display orientation?Gaming and virtual reality input devices?Impact recognition and logging?Vibration monitoring and compensation 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 STK8313 REV 0.9.7 .tw copyright

7、2013 Sensortek Technology Corp.22.PIN DESCRIPTION Pin#Name Function 1 VDD I/O Digital Interface Supply Voltage.2 NC Not Internally Connected.3 NC*Not Internally Connected.4 SCL Serial Communications Clock.5 NC*Not Internally Connected.6 SDA Serial Data(I2C)7 NC Not Internally Connected.8 NC Not Inte

8、rnally Connected.9 INT2 Interrupt 2 Output.10 NC*Not Internally Connected.11 INT1 Interrupt 1 Output.12 GND Must be connected to ground.13 NC Not Internally Connected.14 VS Supply Voltage.15 NC Not Internally Connected.16 NC Not Internally Connected.*Pin3,Pin5,Pin10 are not connected to internal cir

9、cuit,but are shorted together.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 STK8313 REV 0.9.7 .tw copyright 2013 Sensortek Technology Corp.33.FUNCTION BLOCK 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 STK8313 REV 0.9.7 .tw copyright

10、 2013 Sensortek Technology Corp.44.ELECTRICAL SPECIFICATIONS TA=25C,VS=2.8 V,VDD I/O=2.8 V,acceleration=0 g,CS =CI/O =10 F and 0.1 F Parameter Test Conditions Min Typ Max UnitPOWER SUPPLY Operating Voltage Range(VS)2.4 2.8 3.6 V Interface Voltage Range(VDD I/O)1.7 3.6 V Current consumption in active

11、 mode 149 ACurrent consumption in auto-wakeup mode1ODR=25Hz 122 A ODR=3.125Hz 57 Current consumption in standby mode 1 ADigital high level input voltage(VIH)0.7 x VDD I/O V Digital low level input voltage(VIL)0.3 x VDD I/OV High level output voltage(VOH)1 0.8 x VDD I/O V Low level output voltage(VOL

12、)1 0.2 x VDD I/OV OUTPUT DATA RATE AND BANDWIDTH Each axis Output data rate(ODR)in active mode 3.125 400 Hz in auto-wakeup mode 3.125 25 HzBandwidth(BW)ODR/2 Hz1.IOL=10mA,IOH=-4mA 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 STK8313 REV 0.9.7 .tw copyright 2013 Sens

13、ortek Technology Corp.55.MECHANICAL SPECIFICATIONS TA=25C,VS=2.8 V,VDD I/O=2.8 V,acceleration=0 g,CS =CI/O =10 F and 0.1 F Parameter Test Conditions Min Typ MaxUnit SENSOR INPUT Each axis Measurement Range User selectable 2,4,8,16 g Nonlinearity Percentage of full scale 0.28%Cross-Axis Sensitivity T

14、BD Degree OUTPUT RESOLUTION Each axis 2 g Range Full resolution 10 Bits 4 g Range Full resolution 11 Bits 8 g Range Full resolution 12 Bits 16 g Range Full resolution 12 Bits SENSITIVITY Each axis Sensitivity at XOUT,YOUT,ZOUT 2g,10-bit resolution 230 256 282 LSB/g 4g,11-bit resolution 230 256 282 L

15、SB/g 8g,12-bit resolution 230 256 282 LSB/g 16g,12-bit resolution 115 128 141 LSB/g Sensitivity Change Due to Temperature X-,Y-Axes 0.004%/C Z-Axis 0.01%/C 0 g OFFSET1 Each axis 0 g Output for XOUT,YOUT,ZOUT 50 mg 0 g Offset vs.Temperature X-Axis 0.7 mg/C Y-Axis 0.3 mg/C Z-Axis 1.9 mg/C NOISE X-,Y-A

16、xes 8g,12-bit resolution 0.9 LSB rms ODR=100Hz 500 g/sqrt(Hz)Z-Axis 1.0 LSB rms 550 g/sqrt(Hz)X-,Y-Axes 16g,12-bit resolution 0.9 LSB rms ODR=100Hz 1000 g/sqrt(Hz)Z-Axis 1.0 LSB rms 1100 g/sqrt(Hz)SELF-TEST Output Change in X-Axis TBD g Output Change in Y-Axis TBD g Output Change in Z-Axis TBD g 1.T

17、hese parameters are tested in production at final test,and could slightly change after mounting the sensor onto a printed circuit board or exposing it to extensive mechanical stress.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 STK8313 REV 0.9.7 .tw copyright 2013 Se

18、nsortek Technology Corp.66.ABSOLUTE MAXIMUM RATINGS Symbol Ratings Maximum value UnitVS Supply voltage-0.3 to 3.6 V VDD I/O Digital Interface Supply Voltage-0.3 to 3.6 V Vin Input voltage on any control pin-0.3 to 3.6 V AUNP Acceleration(any axis,unpowered)10000 g TOP Operating temperature range-40

19、to+85 C TSTG Storage temperature range-40 to+125 C 4(HBM)kV 500(CDM)V 200(MM)V ESD Electrostatic discharge protection 100(Latch Up)mA 7.DIGITAL INTERFACE All registers in STK8313 can be accessed via the I2C bus.All operations can be controlled by the related registers.There are two signals associate

20、d with the I2C bus:the serial clock line(SCL)and the serial data line(SDA).The latter is a bidirectional line used for sending and receiving the data to/from the interface.Both the lines are connected to DVDD through a pull-up external resistor.To reset the STK8313 without having to reset the entire

21、 I2C bus,an explicit reset command is provided.If register 0 x20 is set to 0 x00,STK8313 will reset all register and enter into standby mode.To reset STK8313 after power on is recommended.In following timing chart,it is STK8313 I2C command format description for reading and writing operation between

22、 the host and STK8313.Slave Address STK8312 provides the fixed slave address of 0 x22 using 7-bit addressing protocol.In following table,it describes the command setting.Device Address R/W Command Bit OPERATION 0 Write Data to STK8313 0 x22(followed by the R/W bit)1 Read Data form STK8313 义嘉有限公司 0 7

23、 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 STK8313 REV 0.9.7 .tw copyright 2013 Sensortek Technology Corp.7Characteristics of the I2C Timing Standard Mode Fast Mode Symbol Parameter Min.Max.Min.Max.UnitfSCLK SCL clock frequency 10 100 10 400 KHztHDSTA Hold time after(repeat

24、ed)start condition.After this period,the first clock is 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 120 120 ns tSUDAT Data set-up time 250 100 ns tr Rise

25、time of both SDA and SCL signals 1000 300 ns tf Fall time of 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.Timing Chart of the I2C Write Command Read Data 义嘉有限公司 0 7 55-

26、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 STK8313 REV 0.9.7 .tw copyright 2013 Sensortek Technology Corp.8 Sequential Read Data 8.FEATURES 8 8.1 1 MMMMo o o od d d de e e e o o o of f f f O O O Op p p pe e e er r r ra a a at t t ti i i io o o on n n n The sensor has three powe

27、r modes:Off Mode,Standby Mode,and Active Mode to offer the customer different power consumption options.Only one mode could be acceptable at a time.The Off Mode offers the lowest power consumption and can only be reached by powering down the analog supply.In this mode,there is no analog supply but d

28、igital supply.Therefore some basic register could be accessed by I2C,but no data appear at XOUT,YOUT,ZOUT register.The Standby Mode is ideal for battery operated products.When Standby Mode is active the device outputs are turned off providing a significant reduction in operating current.When the dev

29、ice is in Standby Mode the current will be reduced to less than 1 A.Standby Mode is entered as soon as both analog and digital power supplies are up.In this mode,the device can read and write to the registers with I2C,but no new measurements can be taken.The mode of the device is controlled through

30、the MODE(0 x0A)control register by accessing the mode bit in the Mode register.During the Active Mode,continuous measurement on all three axes is enabled.In addition,the user can choose to enable:Shake Detection,Tap Detection,Double-Tap Detection,Orientation Detection,Free-Fall Detection,and/or Auto

31、-Wake/Sleep Feature and in this mode the digital analysis for any of these functions is done.The user can configure the samples per second to any of the following:3.125 samples/second,6.25 samples/second,12.5 samples/second,25 samples/second,50 samples/second,100 samples/second,200 samples/second,an

32、d 400 samples/second,for the Auto-Sleep state.If the user is configuring the Auto-Wake feature,the selectable ranges are:3.125 sample/second,6.25 samples/second,12.5 samples/second,25 samples/second.Depending on the samples per second selected the power consumption will vary.Measurement Mode IC Bus

33、DVDD AVDD Function Off Mode STK8313 will respond to I2C bus ON OFF Only I2C available,but no data output.Functions could not be normally set at this mode.Standby Mode STK8313 will respond to I2C bus ON ON STK8313 is powered up in both supplies,so registers can be accessed normally to set STK8313 to

34、Active Mode when desired.STK8313s sensor measurement system is idle.Active Mode STK8313 will respond to I2C bus ON ON STK8313 is able to operate sensor measurement system at user programmable samples per second and run all of the digital analysis functions.Tap detection operates in Active Mode.义嘉有限公

35、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 STK8313 REV 0.9.7 .tw copyright 2013 Sensortek Technology Corp.9 8 8.2 2 S S S St t t ta a a at t t tu u u us s s s a a a an n n nd d d d I I I In n n nt t t te e e er r r rr r r ru u u up p p pt t t t E E E Ev v v ve e e en n

36、 n nt t t t D D D De e e et t t te e e ec c c ct t t ti i i io o o on n n n The Sensor employs both analog and digital filtering to ensure low noise and accurate output when using the part for Shake,Double-Tap,Tap,Free-Fall,or Orientation Detection.During Active Mode,the data is filtered and stored

37、for each of the 3 axes at the specified following measurement intervals:3.125 sample/second,6.25 sample/second,12.5 sample/second,25 sample/second,50 sample/second,100 sample/second,200 sample/second,400 sample/second or indicated in AMSR 2:0.The measurement data is stored in the XOUT1(0 x00),XOUT2(

38、0 x01),YOUT1(0 x02),YOUT2(0 x03),and ZOUT1(0 x04),ZOUT2(0 x05)registers and is used to update the Statue:Shake,Alert,Tap,PoLa2:0(updates Up,Down,Left,and Right position),BaFro1:0(updates Back and Front position)in the TILT(0 x06)register,and FFAL,DTap in the SRST(0 x07)register.The Shake status alwa

39、ys responds to any measurement data over shake threshold value(STH2:0 in the STH(0 x16)register),and the PoLa2:0 and BaFro1:0 status respond to orientation.However,the Tap and DTap status will respond only when ZDA,YDA,or XDA in PDET(0 x0C)register are enabled.The FFAL Status and Interrupt are contr

40、olled by FFINT in ISTMP(0 x17).If FFINT is enabled,the FFAL status and interrupt will simultaneously occur.The customer can configure the part by enabling a number of user desired interrupts in the INTSU(0 x09)and ISTMP(0 x17)register.Once the interrupts are enabled a change in filtered readings wil

41、l cause an interrupt to occur depending on the output.Interrupt Event Summary Interrupt Event Settings Orientation When FBINT,PLINT=1 Shake When SHINTX,SHINTY,SHINTZ=1 Tap When PDINT=1 Double Tap When DPINT=1 X,Y,Z Data Update When GINT=1 Free Fall When FFINT=1 Auto-Wake/Sleep When ASINT=1 Status Su

42、mmary Status Settings PoLa2:0,BaFro1:0 Always available Shake Always available Tap,DTap When enable ZDA,YDA,or XDA FFAL When FFINT=1 NOTE:Sensor Measurements are NOT taken in Standby Mode or in Test Mode.OFF Standby DVDD ON DVDD ONAVDD ONAVDD OFFAVDD OFFMODE bit=0MODE bit=1Active Mode 义嘉有限公司 0 7 55-

43、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 STK8313 REV 0.9.7 .tw copyright 2013 Sensortek Technology Corp.109.REGISTER DEFINATION Address Name Definition Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0$00 XOUT1 12 bit output X MSBsXOUT11 XOUT10 XOUT9 XOUT8 XOUT7 XOUT6 XOUT5 XOU

44、T4$01 XOUT2 12 bit output X LSBs XOUT3 XOUT2 XOUT1 XOUT0-$02 YOUT1 12 bit output Y MSBsYOUT11 YOUT10 YOUT9 YOUT8 YOUT7 YOUT6 YOUT5 YOUT4$03 YOUT2 12 bit output Y LSBs YOUT3 YOUT2 YOUT1 YOUT0-$04 ZOUT1 12 bit output Z MSBsZOUT11 ZOUT10 ZOUT9 ZOUT8 ZOUT7 ZOUT6 ZOUT5 ZOUT4$05 ZOUT2 12 bit output Z LSBs

45、 ZOUT3 ZOUT2 ZOUT1 ZOUT0-$06 TILT Tilt Status Shake Alert Tap PoLa2 PoLa1 PoLa0 BaFro1 BaFro0$07 SRST Sampling Rate Status0 0 0 0 FFAL DTap ReservedAMSRS$08$09 INTSU Interrupt Setup SHINTX SHINTY SHINTZ GINT ReservedPDINT PLINT FBINT$0A MODE Mode IAH IPP ReservedReserved ReservedTON ReservedMODE$0B

46、SR Auto-Wake/Sleep andPortrait/Landscape samples per seconds and Debounce Filter FILT2 FILT1 FILT0 AWSR1AWSR0AMSR2 AMSR1 AMSR0$0C PDET Tap Detection ZDA YDA XDA PDTH4 PDTH3 PDTH2 PDTH1 PDTH0$0D-Reserved-$0E$0F OFSX X-Axis offset OFSX7 OFSX6 OFSX5 OFSX4 OFSX3 OFSX2 OFSX1 OFSX0$10 OFSY Y-Axis offset O

47、FSY7 OFSY6 OFSY5 OFSY4 OFSY3 OFSY2 OFSY1 OFSY0$11 OFSZ Z-Axis offset OFSZ7 OFSZ6 OFSZ5 OFSZ4 OFSZ3 OFSZ2 OFSZ1 OFSZ0$12 PLAT Tap Latency PLAT7 PLAT6 PLAT5 PLAT4 PLAT3 PLAT2 PLAT1 PLAT0$13 PWIN Tap Window PWIN7 PWIN6 PWIN5 PWIN4 PWIN3 PWIN2 PWIN1 PWIN0$14 FTH Free-Fall Threshold FTH7 FTH6 FTH5 FTH4 F

48、TH3 FTH2 FTH1 FTH0$15 FTM Free-Fall Time FTM7 FTM6 FTM5 FTM4 FTM3 FTM2 FTM1 FTM0$16 STH Dynamic Range Setup and Shake Threshold RNG1 RNG0-STH2 STH1 STH0$17 ISTMP Interrupt Setup and Map MFFINT MDPINT-AOI-FFINT DPINT$18 INTMAP Interrupt Map MSHINTX MSHINTY MSHINTZMGINT MASINT MPDINT MPLINT MFBINT$20

49、SWRST Software Rest SWRST7 SWRST6SWRST5SWRST4SWRST3SWRST2 SWRST1SWRST0NOTE:To write to the registers the MODE bit in the MODE(0 x0A)register must be set to 0,placing the device in Standby Mode.$00:12-bits MSBs output value X(Read Only when not in Test Mode)XOUT1 X MSBs Output D7 D6 D5 D4 D3 D2 D1 D0

50、 XOUT11 XOUT10 XOUT9 XOUT8 XOUT7 XOUT6 XOUT5 XOUT4 0 0 0 0 0 0 0 0 This is the MSBs of X-axis output which is signed byte 12-bit 2s complement data with allowable range of+2047 to-2048.XOUT11 is 0 if the g direction is positive,1 if the g direction is negative.$01:12-bits LSBs output value X(Read On