high performance accelerometer with dual spectrum signal processing data sheet ADXL195 / adxl295 rev. spa document feedback information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specif ications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062 - 9106, u.s.a. tel: 781.329.4700 ? 2012 C 2013 analog devices, inc. all rights reserved. technical support www.analog.com features single - axis ( ADXL195 ) an d d ual - axis ( adxl295 ) configurations 120 g baseband acceleration channel 12- bit resolution at 62.5 m g /lsb 512 khz data interpolati on rate 40 g avg high frequency signal process ing channel 10- bit resolution at 83.3 m g avg/lsb 128 khz data interpolation rate sensor frequency response down to dc on - demand electromechanical self - test on - demand hf signal injection self - test fully different ial circuitry for high resistance to emi/rfi independent x - and y - axis sense structures for robust fmea performance independent x - and y - a xis arming thresholds low noise 1 lsb rms (12 - bit baseband acceleration channel) 2 lsb rms (10 - bit high frequency acc eleration channel) qualified for a utomotive a pplications temperature range : ? 40c to + 105c 3.3 v and 5 v o peration applications enhanced c rash s ensing shock d etection general description the ADXL195 / adxl295 are dual spectrum acceleromet ers that measure baseband acceleration in up to two axes (xl - x and xl - y), as well as high frequency (hf) acceleration energy. identical, independent x and y sense structures are implemented to achieve the best possible fail - safe performance. the xl - x an d xl - y channels output baseband acceleration information with a nominal full - scale range of 120 g and a bandwidth of 408 hz. the acceleration data is provided as a 12- bit, twos complement word with a resolution of 62.5 m g /lsb. hf acceleration within the fr equency band of 15.5 khz to 23 khz is rectified and filtered to generate an average g ( g avg ) energy measurement. th e hf channel has a nominal full - scale range of 40 g avg and a bandwidth of 393 hz. when combined with the xl - x and xl - y information, hf accele ration information allows for enhanced vehicle impact detection and discrimination. the ADXL195 / adxl295 are available in a 16 - lead, narrow - body soic package with an exposed pad. the ADXL195 / adxl295 can operat e at 3.3 v and 5 v and are specified for operation from ? 40c to + 105c. functional block dia gram x - a x i s se n s o r y - a x i s se n s o r d e m o d se n s o r dri ve r s se lf - t es t - m o d s t a t e m ach i n e h f se lf - t es t m u x band - p a s s f i lt e r 15. 5kh z t o 23kh z se n s i t i v i t y cal i brat ion | ab s | ii r , s i nc, f i r l o w - p a s s f i lt e r s ?3 d b a t 393 h z i n t e r p o l a t io n a t 128k h z t i m i n g generator o t p m e m o r y d ev i c e i d t r i m c o n f ig ura t ion r e gis t e r s / m e m o r y arm i n g p i n f unc t ional i t y sp i i n t e r f ace v o lt a g e r e g ulator m i s o m o s i s c l k c s v d d v r e g g n d ar m _ y ar m _ x ep a d a c a m p d e m o d se n s o r dri ve r s - m o d a c a m p o ff se t / se n s i t i v i t y cal i bra t io n s i n c 3 + f i r f i lt e r ?3d b a t 408h z o ff se t / se n s i t i v i t y cal i bra t io n s i n c 3 + f i r f i lt e r ?3d b a t 408h z 10496 - 001 mux interpolation at 512khz offset cancellation mux interpolation at 512khz offset cancellation figure 1. for more information about the ADXL195 / adxl295 , please con tact the analog devices, inc., customer interaction center at http://www.analog.com/en/content /technical_support_page/fca.html to connect with a technical support specialist .
ADXL195/adxl295 data sheet rev. spa | page 2 of 2 notes ? 2012 C 2013 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d10496f - 0 - 1/13(spa)
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