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ultralow noise, dual - axis mems gyroscope data sheet adxrs290 features mems p itch and roll rate gyroscope ultralow noise: 0.004 /s/hz high vibration rejection over a wide frequency range power saving standby mode 80 a current consumption i n standby mode fast startup time from standby mode : <10 0 ms low delay of <0.5 ms for a 30 hz input at the widest bandwidth setting serial peripheral interface ( spi ) digital output programmable high - pass and low - pass filters 2000 g powered acceleration sur vivability 2.7 v to 5.0 v operation ? 25 c to + 85 c operation 4.5 mm 5.8 mm 1.2 mm cavity laminate package applications optical i mage stabilization platform stabilization wearable products general description the adxrs290 is a high performance mems pitch and roll ( dual - axis in - plane) angular rate sensor (gyroscope) designed for use in stabilization applications. t he adxrs290 provides an output full - scale range of 100/s with a sensitivity of 200 lsb//s . its resonating disk sensor structure enables angular rate measurement about the axes normal to the sides of the package around an in - plane axis. angular rate data is formatted as 16 - bit twos complement and is accessible through a spi digital interface. t he adxrs290 exhibits a low noise floor of 0.004 /s/ hz and features programmable high - pass and low - pass filter s. the adxrs290 is available in a 4.5 mm 5.8 mm 1.2 mm, 18- terminal cavity laminate package. functional block dia gram cs pdmy sync/asel pdmx adc pitch demod adc roll demod filters control logic serial input/output power management gnd mosi miso sclk digital ast v dd i/o cp v reg v s pitch roll velocity pll mechanical sensor drive adxrs290 12636-001 figure 1 . rev. a 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. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or paten t 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 ? 2014 analog devices, inc. all rights reserved. technical support www.analog.com
adxrs290 data sheet table of contents features .............................................................................................. 1 applications ....................................................................................... 1 general description ......................................................................... 1 functional block diagram .............................................................. 1 revision history ............................................................................... 2 specificatio ns ..................................................................................... 3 absolute maximum ratings ............................................................ 4 rate sensitive axes ....................................................................... 4 package information .................................................................... 4 esd caution .................................................................................. 4 pin configuration and function descriptions ............................. 5 typical performance characteristics ............................................. 6 theory of operation ...................................................................... 10 applications information .............................................................. 11 appl ication circuit ..................................................................... 11 power supply decoupling ......................................................... 11 power sequencing ...................................................................... 11 setting bandwidth ...................................................................... 11 analog eva luation mode ........................................................... 12 mechanical considerations for mounting .............................. 13 serial communications ................................................................. 14 register map ................................................................................... 16 register descriptions ..................................................................... 17 analog devices identifier .......................................................... 17 mems identifier ......................................................................... 17 device identifier ......................................................................... 17 silicon revision number .......................................................... 17 seri al number (snx) ................................................................. 17 rate output data ....................................................................... 17 temperature data ....................................................................... 17 power control ............................................................................. 17 band - pass filter .......................................................................... 17 data ready .................................................................................. 17 recommended soldering profile ................................................. 18 pcb footprint pattern ............................................................... 18 outline dimensions ....................................................................... 19 ordering guide .......................................................................... 19 revision hi story 12/14 rev.0 to rev. a changes to titl e ................................................................................ 1 changes to features section and general description section ....... 1 10/ 14 revision 0 : initial vers i on rev. a | page 2 of 19
data sheet adxrs290 specifications specified conditions at t a = 25 c. v s = v dd i/o = 3 v, angular rate = 0 /sec, bandwidth = dc to 480 hz, c s = c reg = c i/o = c cp = 1 f, digital mode, temperature sensor = off, unless otherwise noted. all minimum and maximum specifications are guaranteed. typical specifications are not tested or guaranteed. table 1. parameter test conditions/comments min typ max unit measurement range each axis output full - scale range 100 /s resolution 16 bits gyroscope data update rate 4250 hz linearity nonlinearity 0.5 % fs cross axis sensitivity 2.0 % sensitivity sensitivity 200 lsb/ /s initial sensitivity tolerance 1 t a = 25c ?12 3 +12 % change d ue to temperature t a = ? 20c to + 60c 1 % offset offset error t a = ?20c to +60c 9 /s noise performance rate noise density t a = 25c at 10 hz 0.004 /s/ hz frequency response programmable (see the setting bandwidth section) ?3 db frequency 2 l ow-p ass f ilter 20 480 hz h igh -p ass f ilter dc o utput setting available 0.011 11.3 hz delay 30 hz input, low - pass filter ( lpf ) = 480 hz < 0.5 ms power supply operating voltage range (v s , v dd i/o ) 2.7 5.0 v supply current measurement mode 7.8 ma standby mode 80 a start -u p time (standby) power off to standby mode <5 ms start -up time (measurement mode) standby to measurement mode (to within 1 /s of final value) <100 ms temperature sensor resolution 12 bits sensitivity 0.1 c/lsb operating temperature range operating temperature range C25 +85 c 1 initial sensitivity tolerance minimum and maximum specifications are guaranteed by characterization and are not tested in production . 2 g uaranteed by design and are not tested in production. rev. a | page 3 of 19
adxrs290 data sheet rev. a | page 4 of 19 absolute maximum ratings table 2. parameter rating acceleration (any axis, unpowered, 0.5 ms) 2000 g acceleration (any axis, powered, 0.5 ms) 2000 g v s , v dd i/o 2.7 v to 5.25 v all other pins 2.7 v to 5.25 v output short-circuit duration (any pin to common) indefinite operating temperature range C40c to +105c storage temperature range C40c to +105c stresses at or above those listed under absolute maximum ratings may cause permanent damage to the product. this is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. operation beyond the maximum operating conditions for extended periods may affect product reliability. rate sensitive axes the adxrs290 is an x-axis and y-axis rate sensing device that is also called a roll and pitch rate sensing device. it produces a positive output voltage for clockwise rotation about the x-axis and y-axis, as shown in figure 2. ? y ? x 12636-002 figure 2. axes of sensitivity package information the information in figure 2 and table 3 provide details about the package branding for the adxrs290 . for a complete listing of product availability, see the ordering guide section. table 3. package branding information branding key field description xr290 part identifier for adxrs290 #yyyy date code xxxxxx pin 1 and factory lot code identifiers esd caution
data sheet adxrs290 pin configuration an d function descripti ons pdmy cs miso mosi pdmx sens ast v dd i/o v reg sclk sync/asel cp gnd v s v s v reg gnd gnd 1 2 3 4 5 13 12 11 10 9 6 7 8 15 16 17 18 14 top view (terminal side down) not to scale adxrs290 12636-003 figure 3 . pin configuration ( top view) table 4 . pin function descriptions description pin no. mnemonic digital mode analog evaluation mode 1 v reg regulator output. c onnect a 1 f capacitor to this pin. regulator output. con nect a 1 f capacitor to this pin. 2 v dd i/o digital interface supply voltage. digital interface supply voltage. 3 ast this pin is internally pulled to ground. self t est. 4 sens this pin is internally pulled to ground. sensitivity s elect. 5 pdmx this pin is internally pulled to ground. pulse - density modulation (pdm) x out . 6 pdmy this pin is internally pulled to ground. pdm y out . 7 cs chip select . active l ow. chip select. active low. 8 miso (sdo) serial data out. serial data out. 9 mosi (sdi) serial data in. serial data in. 10 sclk serial communications clock. serial communications clock. 11 sync/asel data ready o ut ( sync ). connect this pin to ground if it is not used. analog e nable (asel) . 12 cp charge pump output. connect a 1 f capacitor (rated for 50 v) to this pin. charge pump output. connect a 1 f capacitor (rated for 50 v) to this pin. 13, 15, 16 gnd ground. c onnect to ground. ground. c onnect to ground. 14 v s analog supply voltage. analog supply voltage. 17 v reg regulator output. c onnect a 1 f capacitor to this pin. regulator output. con nect a 1 f capacitor to this pin. 18 v s analog supply voltage. analog supply voltage. rev. a | page 5 of 19
adxrs290 data sheet typical performance characteristics n > 240 for all typical performance characteristics plots, unless otherwise noted. 70 0 10 20 30 40 50 60 ?500 ?400 ?300 ?200 ?100 0 100 200 300 400 500 percent of population (%) x-axis offset (lsb) 12636-004 figure 4 . x - axis offset at 25c 400 ?400 ?300 ?200 ?100 0 100 200 300 ?50 ?25 0 25 50 75 100 offset (lsb) temperature (c) 12636-005 figure 5 . x - axis offset vs. temperature (n = 16) 22 20 18 16 14 12 10 8 6 4 2 0 percent of population (%) x-axis sensitivity (lsb//s) 180 182 184 186 188 190 192 194 196 198 200 202 204 206 208 210 212 214 216 218 220 12636-006 figure 6 . x - axis sensitivity at 25c 40 35 0 5 10 15 20 25 30 ?500 ?400 ?300 ?200 ?100 0 100 200 300 400 500 percent of population (%) y-axis offset (lsb) 12636-007 figure 7 . y - axis offset at 25c 1500 1000 ?1500 ?1000 ?500 0 500 ?50 ?25 0 25 50 75 100 offset (lsb) temperature (c) 12636-008 figure 8 . y - axis offset vs. temperature (n = 16) 20 18 16 14 12 10 8 6 4 2 0 percent of population (%) y-axis sensitivity (lsb//s) 180 182 184 186 188 190 192 194 196 198 200 202 204 206 208 210 212 214 216 218 220 12636-009 figure 9 . y - axis sensitivity at 25c rev. a | page 6 of 19
data sheet adxrs290 220 180 185 190 195 200 205 210 215 ?50 ?25 0 25 50 75 100 sensitivity (lsb//s) temperature (c) 12636-010 figure 10 . x - axis sensitivity vs. temperature (n = 16) 250 ?250 ?200 ?150 ?100 ?50 0 50 100 150 200 0 80 70 60 50 40 30 20 10 angular rate (/s) time (ms) reference adxrs290 12636-0 1 1 figure 11 . rate output saturation behavior 2.0 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 60 ?20 ?10 0 10 20 30 40 50 0 0.20 0.15 0.10 0.05 rate output (/s) input acceleration ( g ) time (seconds) x-axis y-axis input reference 12636-012 figure 12 . response to 50 g , 10 ms half - sine shock along the z - axis (out - of - plan e), hpf = off and lpf = 480 hz 220 180 185 190 195 200 205 210 215 ?50 ?25 0 25 50 75 100 sensitivity (lsb//s) temperature (c) 12636-013 figure 13 . y - axis sensitivity vs. temperature (n = 16) 0.20 0.15 ?0.20 ?0.10 ?0.05 ?0.15 0 0.10 0.05 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 1 10 average value of rate output (/s) rms value of rate output (/s) frequency (khz) x output (average) y output (average) x output (rms) y output (rms) 12636-014 figure 14 . response to 10 g sine vibration along the z - axis (out - of - plane) , hpf = off and lpf = 480 hz 0.1 0.00001 0.0001 0.001 0.01 0.1 100 10 1 10k 1k noise spectral density (/s/hz) frequency (hz) x-axis y-axis 12636-015 figure 15 . typical noise spectral density rev. a | page 7 of 19
adxrs290 data sheet 200 ?200 ?150 ?100 ?50 0 50 100 150 0 100 80 60 40 20 90 70 50 30 10 rate output (/s) time (ms) 12636-017 x-axis y-axis figure 16 . start - up time (standby to measurement mode) 1200 1000 800 600 400 200 0 ?200 ?400 ?600 ?50 100 75 50 25 0 ?25 temperature sensor output (lsb) ambient temperature (c) 12636-023 figure 17 . temperature sensor output vs. ambient temperature (n = 16) 3.0 0 0.5 1.0 1.5 2.0 2.5 0 50 40 30 20 10 group delay (ms) input frequency (hz) lpf = 80hz lpf = 160hz lpf = 320hz 12636-021 figure 18 . low - pass filter group delay 0 ?35 ?30 ?25 ?20 ?15 ?10 ?5 0 50 40 30 20 10 phase delay (degrees) input frequency (hz) lpf = 80hz lpf = 160hz lpf = 320hz 12636-020 figure 19 . low - pass filter phase delay 0.5 ?0.5 ?0.4 ?0.3 ?0.2 ?0.1 0 0.1 0.2 0.3 0.4 ?125 125 75 25 ?25 ?75 nonlinearity (% of full-scale) angular rate (/s) 12636-022 figure 20 . rate output nonlinearity (n = 15) 50 0 10 20 30 40 45 5 15 25 35 10 15 20 25 30 35 40 45 50 55 60 percent of population (%) standby mode current (a) 12636-019 figure 21 . standby mode current consumption rev. a | page 8 of 19
data sheet adxrs290 50 0 10 20 30 40 45 5 15 25 35 percent of population (%) measurement mode current (ma) 12636-024 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 figure 22 . measurement mode current consumption rev. a | page 9 of 19
adxrs290 data sheet theory of operation the adxrs290 is designed to sense x - axis and y - axis (roll and pitch) angular rate. the adxrs290 operates on the principle of a vibrato ry rate gyroscope. figure 23 presents a simplified illustration of one of four, coupled polysilicon sensing structures . each sensing structure contains a resonating d isk that is electrostatically driven to resonance , which produces the necessary rotating velocity element needed to generate a coriolis torque when experiencing angular rate. y x y-axis x-axis 12636-025 figure 23 . simplified gyroscope sensing structure when the sensing structure is exposed to an angular rate, the resulting coriolis torque drives each of the disks into a tilting motion, which is sensed by plates under the disk. the disk and plate form a capacitive pickoff structure that senses angular rat e . the resulting signal is fed to a series of gain and demodulation stages that produce the electrical rate signal output. the sensor design rejects linear and angular acceleration because external g - forces appear as common - mode signals that are removed by the fully differential architecture of the adxrs290 . the resonator requires 31 v (typical) for operation. because only 5 v is typically available in most applications, a switching regulator i s included on - chip. an external 1 f capacitor rated for 50 v is required for proper operation of the charge pump circuit. after demodulation and analog - to - digital conversion , the rate signal is filtered using a single - pole band - pass filter. the high - pass and low - pass poles of this filter are programmable via the digital interface. rev. a | page 10 of 19
data sheet adxrs290 applications information application circuit the adx rs290 application circuit is shown in figure 24 . the primary communications port is the 4 - wire spi interface. for this devic e, external pull - up/pull - down resistors are not require d for the spi interface, and these pins can be connected directly to the system microcontroller. four capacitors are required for proper o peration of the device. for optimum device perform ance, s eparate the capacitors placed on the v s , v dd i/o , v reg , and cp pins. sclk sync/asel cp gnd v s pdmy cs miso mosi pdmx sens ast v dd i/o v reg v s v reg gnd gnd 1 2 3 4 5 14 13 12 11 10 9 6 7 8 15 16 17 18 top view (terminal side down) not to scale adxrs290 2.7v to 5.25v 2.7v to 5.25v c reg 1f c cp 1f 50v c s 1f c i/o 1f spi bus 12636-026 figure 24 . recommended application circuit power supply decoupl ing in many applications, bypass capacitors at v s , v reg , and v dd i/o (as shown in figure 24 ) placed close to the adxrs290 supply pins adequately de couple the gyroscope from noise on the power supply. however, in applica tions where noise is present at the internal clock frequency, or any harmonic thereof, additional care in power supply bypassing is required because this noise may cause errors in angular rate measure ment. if additional decoupling is necessary, a 10 ? resi stor or ferrite bead in series with v s and an additional larger bypass capacitor (2.2 f or greater) at v s may be helpful. ensure that the connection from the adxrs290 ground to the power supply ground be low impedance because noise transmitted through ground has an effect similar to noise transmitted through v s . power sequencing th e interface voltage level is set with the interface supply voltag e v dd i/o , which must be present to ensure that the adxrs290 does not create a conflict on the communications bus. for single - supp ly operation, v dd i/o can be the same as the main supply ( v s ). conversely, in a dual - supply application, v dd i/o can differ from v s to accommodate the desired interface voltage. when v s is a pplied, the device enters standby state, where power consum ption is minimized , and the device waits for v dd i/o to be applied an d for a command to enter measurement mode. measurement mode is activated by setting b it b1 in r egister 0x10 ( power_ctl ) . clear this bit to return the device to a standby state . in standby mode, the current consumption is reduced to 80 a (typical). in standby mode, only single - address spi transactions are performed , which includes reading from or writing to a single register, but does not include writing to or reading from s everal registers in one command . i n standby mode , the gyroscope does not respond to rate outputs. transition time to measurement mode where offsets settle to within 1 /s of the final value is <100 ms. setting bandwidth the adxrs290 includes an internal c onfigurable band - pass filter. both the high - pass and low - pass poles of the filter are adjustable , as shown in table 5 and table 6 . the filter frequency response is shown in figure 25 and figure 26 . the group delay of the wideband filter option is less than 0.5 ms (see figur e 18 for filter delay ) . at power - up, the default condition for the filters is dc for the high - pass filter and 480 hz for the low - pass filter . table 5 . low - pass filter pole locations b it 2 filter b it 1 filter b it 0 filter frequency (hz) 0 0 0 480 (default) 0 0 1 320 0 1 0 160 0 1 1 80 1 0 0 56.6 1 0 1 40 1 1 0 28.3 1 1 1 20 table 6 . high - pass filter pole locations bit 7 filter bit 6 filter bit 5 filter bit 4 filter frequency (hz) 0 0 0 0 all p ass ( d efault) 0 0 0 1 0.011 0 0 1 0 0.022 0 0 1 1 0.044 0 1 0 0 0.087 0 1 0 1 0.175 0 1 1 0 0.350 0 1 1 1 0.700 1 0 0 0 1.400 1 0 0 1 2.800 1 0 1 0 11.30 rev. a | page 11 of 19
adxrs290 data sheet 1.2 1.0 0.8 0.6 0.4 0.2 0 0.0001 1k 100 10 1 0.1 0.01 0.001 normalized magnitude frequency (hz) 12636-027 0.011hz 0.022hz 0.044hz 0.087hz 0.175hz 0.35hz 0.7hz 1.4hz 2.8hz 11.3hz figure 25 . high - pass filter frequency response 1.2 1.0 0.8 0.6 0.4 0.2 0 1 10k 1k 100 10 normalized magnitude frequency (hz) 12636-028 20hz 28.3hz 40hz 56.6hz 80hz 160hz 320hz 480hz figure 26 . low - pass filter frequency response offset preservation in the high - pass filter one of the functions of the high - pass filter is to remove offset. the high - pass filter effectively estimates the offset and subtracts it from the output. when the high - pass filter settings are changed, the output remains unchanged; the filter preserves its estimate of offset. the high - pass filter can be set to the fast settl ing option, allowed to converge to zero offset, and then set to any other high - pass filter option while maintaining near zero offset. exiting measurement mode clears the preserved offset. analog evaluation m ode an analog output evaluation mode has been incorporated in the adxrs290 . in this mode, the output of the adxrs290 is formatted as a pulse density modulated data s tream at a frequency of 144 khz via the pdmx and pdmy pins . the pdmx and pdmy pins high and low voltage levels are ratiometric to v dd i/o . this signal can be decoded into an analog baseband using a low - pass filter. higher order filters allow for greater at tenuation of the 144 khz switching noise while maintaining the integrity of the baseband signal. a recommended application circuit with a third - order sallen - key filter is shown in figure 27 . figure 28 shows the recommended low - pass filter for demodulating the pdm output in analog mode operation. sclk sync/asel cp gnd v s pdmy cs miso mosi pdmx sens ast v dd i/o v reg v s v reg gnd gnd 1 2 3 4 5 14 13 12 11 10 9 6 7 8 15 16 17 18 top view (terminal side down) not to scale adxrs290 2.7v to 5.25v 2.7v to 5.25v c reg 1f c cp 1f 50v c s 1f c i/o 1f low-pass filter 12636-029 figure 27 . recommended application ci rcuit for analog mode operatio n +5v ?5v 0.1f 0.1f 47k? 30.1k? analog baseband signal 5100pf 30.1k? 0.01f 24k? 0.01f pdmx or pdmy 12636-030 figure 28 . recommended low - pass filter for demodulating the pdm output in analog mode operation in analog mode, the band - pass filter is disabled and the device cannot be placed in standby mode. spi communication to the adxrs290 is available but not required. sensitivity in this mode is 5 mv//s. rev. a | page 12 of 19
data sheet adxrs290 mechanical considera tions for mounting mount t he adxrs290 on the printed circuit board ( pcb ) in a location close to a hard mounting point of the pcb to the case. mounting the adxr s290 at an unsupported pcb location, as shown in figure 29 , may result in large, apparent measurement errors due to undamped pcb vibration. locating the adxrs290 near a hard mounting point ensures that any pcb vibration at the device is above the resonant frequencies of the mems element s and, therefore, effectively invisible to the device. in ap plications where the gyroscope may be subjected to large shock events or excessive vibration , consider the use of damping material s (such as polyurethane) at the mounting locations to dampen the vibration. a thicker pcb can also help to reduce the effect o f system resonance on the performance of the adxrs290 . mounting points good placement bad placement 12636-031 figure 29 . two examples of incorrectly mounted gyroscopes rev. a | page 13 of 19
adxrs290 data sheet serial communi cations in digital mode, the adxrs290 communicates via 4 - wire spi and operates as a slave. ignore d ata transmitted from the adxrs290 to the master device during writes to the adxrs290 . wire t he adxrs290 for spi communication as shown in the connection diagram in figure 30 . the maximum spi clock speed is 5 mhz, wi th 12 pf ma ximum loading. the timing s chem e follows clock phase ( cpha ) = clock polarity ( cpol ) = 1 . ss cs mosi sdi miso sdo sclk sclk adxrs290 processor 12636-032 figure 30 . 4 - wire spi connection cs is the serial port enable line and is controlled by the spi master. it must go low at the start of transmissions and high at the end as shown in figure 31 . sclk is the serial port clock and is supplied by the spi maste r. it is stopped high when cs is high , during periods of no transmission. at the rising edge of sclk, data can be sampled . unless the adxrs290 is in standby mode, m ultipl e bytes can be written to or read from in a single transmission . i n standby mode, only single register transactions are supported. deasserting the cs pin is necessary between commands for transmissions with multiple commands. for spi operation greater than 1 mhz, it is necessary to deassert the cs pin to ensure a tot al delay of 10 s bet ween the register addressing portion of the transmission. the delay is required to allow settling of the internal voltage controlled oscillator. for spi operation of 1 mhz or lower, the communication rate is low enough to ensure a sufficient delay between register writes. spi read and write operatio ns are completed in 16 or more clock cycles , as shown in figure 31. setting the r/w bit to 1 indicates a read operation and setting it to 0 indicates a write operation. for r/w = 0 ( w rite) , [ d7:d0 ] data is written to the device in the register map based on the [ a6:a0 ] addresses . for r/w = 1 ( r ead) , [ d7:d0 ] is the data read by the external master device based on the [ a6:a0 ] addresses . examples of spi write and read are shown in figure 32 and figure 33. r/w a6 a4 a3 a2 a1 a0 d7 d6 d5 d4 d3 d2 d4 d0 d7 d6 d5 d4 d3 d2 d1 d0 cs sclk sdi sdo t delay t sclk t m t sdo t setup t hold t s t quiet a5 12636-033 figure 31 . spi timing diagram table 7. spi timing specifications (t a = 25c, v s = v dd i/o = 2.7 v) parameter limit unit description f sclk 5 mhz max spi clock frequency t sclk 200 ns min 1/(spi clock frequency) , mark/space ratio for the sclk input is 40/60 to 60/40 t delay 200 ns min cs falling edge to sclk falling edge t quiet 200 ns min sclk rising edge to cs rising edge t s 0.4 t sclk ns min sclk low pulse width (space) t m 0.4 t sclk ns min sclk high pulse width (mark) t sdo 20 ns max sclk falling edge to sdo transition t setup 10 ns min sdi valid before sclk rising edge t hold 10 ns min sdi valid after sclk rising edge rev. a | page 14 of 19
data sheet adxrs290 12636-034 ch1 5.00v ch2 5.00v ch3 5.00v ch4 5.00v m4.00s a ch1 1.8v 2 4 1 3 t 7.400s t mosi miso sclk cs figure 32 . spi write example: writing to register 0x10 (write 0x02 to enter measurement mode) 12636-035 ch1 5.00v ch2 5.00v ch3 5.00v ch4 5.00v m4.00s a ch1 1.8v 2 4 1 3 t 7.400s t mosi miso sclk cs figure 33 . spi read example: reading register 0x01 (output = 0x1d) rev. a | page 15 of 19
adxrs290 data sheet register ma p table 8. reg ister no. (hex) name bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 reset r/w 0x00 adi_id adi_id[7:0] 10101101 r 0x01 mems _id mems_id[7:0] 00011101 r 0x02 dev _id dev_id[7:0] 10010010 r 0x03 rev _id rev_id[7:0] 00001001 r 0x04 sn0 sn[7:0] sn[7:0] r 0x05 sn1 sn[15:8] sn[15:8] r 0x06 sn2 sn[23:16] sn[23:16] r 0x07 sn3 sn[31:24] sn[31:24] r 0x08 datax0 x0[7:0] 00000000 r 0x09 datax1 x1[15:8] 00000000 r 0x0a datay0 y0[7:0] 00000000 r 0x0b datay1 y1[15:8] 00000000 r 0x0c temp0 t emp [7:0] 00000000 r 0x0d temp1 0 0 0 0 t emp [11:8] 00000000 r 0x0e reserved reserved[7:0] 00000000 r 0x0f reserved reserved[7:0] 00000011 r 0x10 power_ctl 0 0 0 0 0 0 measurement tsm 00000000 r/w 0x11 f ilter hpf[3:0] 0 lpf[2:0] 00000000 r/w 0x012 data_ready 0 0 0 0 0 0 s ync [1:0] 00000000 r/w rev. a | page 16 of 19
data sheet adxrs290 register description s this section describes the functions of the adxrs290 registers. the adxrs290 powers up with default register values as shown in the r eset column of table 8 . analog devices i dentifier table 9 . register 0x00, adi_id (read only) b it 7 b it 6 b it 5 b it 4 b it 3 b it 2 b it 1 b it 0 1 0 1 0 1 1 0 1 the adi_id register holds a fixed code 0xad. mems i dentifier table 10 . register 0x01, mems_id (read only) b it 7 b it 6 b it 5 b it 4 b it 3 b it 2 b it 1 b it 0 0 0 0 1 1 1 0 1 the mems_id register holds a fixed code of 0x1d. device identifier table 11 . register 0x02, dev_id (read only) b it 7 b it 6 b it 5 b it 4 b it 3 b it 2 b it 1 b it 0 1 0 0 1 0 0 1 0 the dev_id register holds a fixed code of 0x92. silicon revision number table 12. register 0x03, rev_id (read only) b it 7 b it 6 b it 5 b it 4 b it 3 b it 2 b it 1 b it 0 0 0 0 0 1 0 0 1 the rev_id register holds a revision id code that increment s with each subsequent silicon revision. s erial number (sn x) these four bytes (register 0x04 to register 0x07) store the unique electronic serial number for the part. rate output data register 0x08 to register 0x0b : datax0, datax1, datay0, and datay1 (read only) these four bytes ( r egister 0x08 to r egister 0x0b) hold the rate output data for each axis. register 0x08 and r egister 0x09 hold the output data for the x - axis , and r egister 0x0a and r egister 0x0b hold the output data for the y - axis. the output data is written in two s complement. in each two byte set, datax0 is the least significant byte , and datax1 is the most significant byte, where x represents the x - axis or the y - axis . to prevent a change in data between reads of the sequential registers, perform a multiple byte read of all rate output dat a registers. temperature data register 0x0c to register 0x0d : temp 0 and temp1 (read only) these two bytes hold temperature output data written in twos complement. register 0x0c contains b its[7:0] and r egister 0x0d contains b its[11:8] of the 12 - bit temperature reading. when concurrent temperature and output data points are desired, perform a multiple byte read of the temp1: temp 0, datax1: datax 0 , and datay1: datay 0 registers. the scale factor of the temperature reading is 10 lsb/ c, and 0 codes is equivalent to 0c. power control table 13 . register 0x10, power_ctl (read/write) bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 0 0 0 0 0 0 measure ment tsm tsm bit th e tsm bit controls the temperature sensor. the default value of this bit is 0 (temperature sensor off) and setting this bit to 1 enables the temperature sensor. measure ment bit to set the adxrs290 to standby mode, set the measurement bit to 0 . to set the adxrs290 to measurement mode, set this bit to 1 . the adxrs290 powers up in standby mode with a current consumption of 8 0 a (typical). band - pass filter table 14 . register 0x11, f ilter (read/write) b it 7 b it 6 b it 5 b it 4 b it 3 b it 2 b it 1 b it 0 hpf [3 :0] 0 lpf [ 2:0] lpf bits the three lpf bits define the low - pass filter pole (see tabl e 5 ) . hpf bits the four hpf bits define the high - pass filter pole (see table 6 ) . data r ead y table 15 . register 0x12, data_ready (read/write) b it 7 b it 6 b it 5 b it 4 b it 3 b it 2 b it 1 b it 0 0 0 0 0 0 0 s ync [1:0] s ync bits s et the s ync bits to 01 to generate a data ready interrupt at the sync/asel pin when new data becomes available . table 16. sync pin functions b it 1 b it 0 description x 0 read for analog enable 0 1 data ready out, high until read rev. a | page 17 of 19
adxrs290 data sheet recommended solderin g profile figure 34 and table 17 provide details about the recommended soldering profile. t p t l t 25c to peak t s preheat critical zone t l to t p temperature time ramp-down ramp-up t smin t smax t p t l 12636-036 figure 34 . recommended soldering profile table 17 . recommended soldering profile 1, 2 condition profile feature sn63/pb37 pb - free average ramp rate from liquid temperature (t l ) to peak temperature (t p ) 3c/sec maximum 3c/sec maximum preheat minimum temperature (t smin ) 100c 150c maximum temperature (t smax ) 150c 200c time from t smin to t smax (t s ) 60 seconds to 120 seconds 60 seconds to 180 seconds t smax to t l ramp - up rate 3c/second maximum 3c/second maximum liquid temperature (t l ) 183c 217c time maintained above t l (t l ) 60 seconds to 150 seconds 60 seconds to 150 seconds peak temperature (t p ) 240 + 0/?5c 260 + 0/?5c time of actual t p ? 5c (t p ) 10 seconds to 30 seconds 20 seconds to 40 seconds ramp - down rate 6c/sec maximum 6c/sec maximum time 25c to peak temperature 6 min utes maximum 8 min utes maximum 1 based on jedec standard j - std - 020d.1. 2 for best results, the soldering profile should be in accordance with the recommendations of the manufacturer of the solder pa st e used. pcb footprint pattern 12636-037 4.00mm 5.66mm 2.70mm 4.35mm 0.25mm typ 0.40mm typ 0.60mm typ figure 35 . pcb footprint pattern and dimen sions rev. a | page 18 of 19
data sheet adxrs290 outline dimensions 04-26-2012-a 4.60 4.50 4.40 5.90 5.80 5.70 bot t om view top view side view 0.65 bsc 0.70 bsc 0.35 ref 1.60 ref 1.30 1.20 1.10 0.24 ref 4.06 ref 5.36 ref 0.30 0.45 (pins 1-5, 10-14) 0.45 0.30 (pins 6-9, 15-18) 1 5 6 9 10 14 15 18 1.03 bsc 0.65 bsc 1.28 ref 0.095 ref 0.35 ref r 0.68 ref r 0.15 ref pin 1 land corner pin 1 land indicator vent hole figure 36 . 18- terminal chip array small outline no lead cavity [lga_cav] 5.80 mm 4.50 mm body (ce - 18- 2) dimensions shown in millimeters ordering guide model 1 temperature range package description package option adxrs290bcez ? 25 c to +85c 18- terminal chip array small outline no lead cavity [lga_cav] ce -18-2 adxrs290bcez -rl ?25c to +85c 18- terminal chip array small outline no lead cavity [lga_cav] ce -18-2 adxrs290bcez - rl7 ?25c to +85c 18 - terminal chip array small outline no lead cavity [lga_cav] ce - 18 - 2 eval - adxrs290z breakout evaluation board eval - adxrs290z -m analog devices inertial sensor evaluation system , which includes a socket version of the satellite ( adxrs290 -s) board eval - adxrs290z -s adxrs290 satellite, standalone socket version eval - adxrs290z -m2 analog devices inertial sensor evaluation system , which includes a soldered version of the satellite (adxrs290 - s2 ) board eval - adxrs290z -s2 adxrs290 satellite, standalone soldered version 1 z = rohs compliant part. ? 2014 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d12636 - 0- 12/14(a) rev. a | page 19 of 19

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