sca8 30 - d 0 7 murata electronics oy 1 / 4 1 / 5 www.muratamems .fi doc.nr . 82 823 00 d sca 8 3 0 - d 07 1 - axis inclinometer with digital spi interface features ? 3.3v supply voltage ? ? 1 g measurement range ? single axis measurement in y direction ? ? 30 mg offset accuracy over temp range ? spi digital interface ? extensive self diagnostics features ? size 7.6 x 3.3 x 8.6 mm (w x h x l) ? qualified according to aec - q100 standard ? package, pin - out and spi protocol compatible with murata digital accelerometer product family ? rohs compliant dual flat lead (dfl) plastic package suitable for lead free solder ing process and smd mounting ? proven capacitive 3d - mems technology ? high resolution 16 - bit a/d converter applications the sca830 - d07 is targeted to applications with high stability requirements. typical applications include ? hill start aid (hsa) ? electroni c parking brake (epb) ? roll over detection ? suspension control ? inclinometers ? motion and position measurements general d escription the sca830 - d07 is a single axis inclinometer component based on murata 's capacitive 3d - mems technology . the component i ntegrates high accuracy micromechanical acceleration sensing together with a flexible spi digital interface. dual flat lead (dfl) housing guarantees reliable operation over product lifetime. the sca830 - d07 is designed , manufactured and tested for high sta bility, reliabi lity and quality requirements of automotive applications. the inclinometer has an extremely stable output over wide range s of temperature, humidity and mechanical noise. the component is qualified to the aec - q100 standard and has several adv anced self diagnostics features. the dfl housing is suitable for smd mounting and the component is compatible with the rohs and elv directives. the sca830 - d07 is a part of murata 's digital accelerometer family and fully compatible with its si n g le axis ac celerometers (sca800 s eries) and other mult i axis accelerometers (sca2100 series and sca3100 s eries). data s heet
sca830 - d07 murata electronics oy 2 / 5 2 / 5 www.muratamems .fi doc. nr. 82823 00 d performance c haracteristics vdd=3.3 v and ambient temperature unless otherwise specified. parameter condition min typ a) max units analog and digital vdd 3.0 3.6 v current consumption active mode power down mode 5 6. 3 0.1 m a ma measurement range measurement ax i s (y) - 1 - 90 1 +90 g operating temperature - 40 125 c total offset error b) temperature range - 40 ... +125 c - 70 +70 mg offset stability c ) temperature range - 40 ... +125 c - 25 - 1.5 25 1.5 mg offset calibration error d) @25c 20 1.1 mg offset temperature drift temperature range - 40 ... +125 c temperature range - 20 ... +85 c 1 3 f) 0.85 30 e) mg mg sens itivity 1 6 bit output between 3 32 000 0.001 79 count/g /count total sensitivity error temperature range - 40 ... +125 c - 4 4 % fs sensitivity calibration error @25 c 5c 1.4 % fs sensitivity temperature drift temperature range - 40 ... +125 c 0.9 % fs linearity error +1g ... - 1g range - 20 20 mg cross - axis sensitivity 2 3.5 % zero acceleration output 2 - complement 0 counts amplitude response - 3db frequency 6.25 hz noise 0.15 5 mg rms power on setup time 0. 3 s outp ut data rate 125 hz output load 50 pf spi clock rate 8 mhz esd protection human body model charge device model 2 1 kv kv moisture sensitivity level ipc/jedec j - std - 020c, level 3 mechanical shock 20 000 g id register value custome r readable id register (27hex) 0a a ) t ypical values are 3 sigma variation limits from validation test population. b) includes offset deviation from 0g value including calibration error and drift over lifetime, temperature and supply voltage. c ) af ter mounting of ecu the application and after offset zero - setting at room temperature. relevant offset failure due to temperature dependency of offset as well as aging over lifetime d ) includes offset deviation from 0g value including calibration error an d drift over lifetime . e) offset drift due to temperature. value is a relative value and has been centered to zero. error defined as maximum change of offset in temperature range. offset (max) - offset min) . 100% tested in production . f) biggest change of ou tput from rt value due temperature. mosi miso sck csb c/v a/d signal conditioning and filtering spi self diagnostics pwm pwm temp sensor
sca830 - d07 murata electronics oy 3 / 5 3 / 5 www.muratamems .fi doc. nr. 82823 00 d figure 1. sca 830 - d07 b lock d iagram typical performance characteristics offset calibration error 0 5 10 15 20 25 30 35 40 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 offset [m g] percent of parts[%] temperature dependency of offset -20 -15 -10 -5 0 5 10 15 20 25 30 -45 -20 5 30 55 80 105 130 temp [ o c] offset[mg] +3 sigma mean -3 sigma offset drift at temperature range -40 o c+125 o c 0 5 10 15 20 25 30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 offset drift [m g] percent of parts[%] sensitivity at 25 o c 0 5 10 15 20 25 30 35 40 45 50 31300 31450 31600 31750 31900 32050 32200 32350 32500 32650 32800 sensitivity [lsb/g ] percent of parts[%] sensitivity drift at temperature range -40 o c+125 o c 0 5 10 15 20 25 30 35 40 45 50 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 sensitivity error [% fs] percent of parts[%]
sca830 - d07 murata electronics oy 4 / 5 4 / 5 www.muratamems .fi doc. nr. 82823 00 d measument directions figure 1 . accelerometer measuring directions f igure 2 . zero acceleration output position housing dimensions figure 3 . housing dimensions earth gravitation p i n 1
sca830 - d07 murata electronics oy 5 / 5 5 / 5 www.muratamems .fi doc. nr. 82823 00 d application note for acceleration output reading (16 bit output sensitivity) this is addition to sca8x0_21x0_3100 produ ct family specification chapter 3.1. dout_lsb address: 4h bits mode initial value name description 7:0 r 00h data acceleration data lsb frame read always dout_msb prior to dout_lsb. dout_msb address: 5h bits mode initial value name description 7:0 r 00h data acceleration data msb frame reading of this register latches dout_ lsb. the bit level description of acceleration data from dout_lsb ... dout_msb registers is presented below. the a c celeration data is presented in 2's complement format. at 0 g acceleration the output is ideally 0000h. s = sign bit acceleration bits can be converted to mg acceleration (acc) using following equation +/-1g product dout msb bits(7:0) dout lsb bits(7:0) 16b bit number 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 [-] bits (15:0) sca8xx s 512,0 256,0 128,0 64,0 32,0 16,0 8,0 4,00 2,00 1,00 0,50 0,25 0,13 0,06 0,03 [mg] [dec] +1g position 0 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 1000 32000 -1g position 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 -1000 -32000 +full-scale 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1023 32767 -full-scale 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1024 -32768 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 2 13 2 14 2 32 1 1 3 4 4 5 6 7 8 9 10 11 12 13 14 15 b b b b b b b b b b b b b b b s mg acc
|
