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high stability, low noise vibration rejecting yaw rate gyroscope enhanced product ADXRS646-EP rev. 0 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 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 analog devices, inc. all rights reserved. technical support www.analog.com features 12/hr bias stability z-axis (yaw rate) response 0.01/sec angle random walk high vibration rejection over wide frequency measurement range extendable to a maximum of 450/sec 10,000 g powered shock survivability ratiometric to referenced supply 6 v single-supply operation self-test on digital command ultrasmall and light (<0.15 cc, <0.5 gram) temperature sensor output complete rate gyroscope on a single chip rohs compliant enhanced product features supports defense and aerospace applications (aqec standard) extended industrial temperature range (?55c to +105c) controlled manufacturing baseline 1 assembly/test site 1 fabrication site enhanced product change notification qualification data available on request applications industrial applications severe mechanical environments platform stabilization general description the ADXRS646-EP is a high performance angular rate sensor (gyroscope) that offers excellent vibration immunity. bias stability is a widely recognized figure of merit for high performance gyro- scopes, but in real-world applications, vibration sensitivity is often a more significant performance limitation and should be considered in gyroscope selection. the ADXRS646-EP offers superior vibration immunity and acceleration rejection as well as a low bias drift of 12/hr (typical), enabling it to offer rate sens- ing in harsh environments where shock and vibration are present. the ADXRS646-EP is manufactured using the analog devices, inc., patented high volume bimos surface-micromachining process. an advanced, differential, quad sensor design provides the improved acceleration and vibration rejection. the output signal, rateout, is a voltage proportional to angular rate about the axis normal to the top surface of the package. the measure- ment range is a minimum of 250/sec. the output is ratiometric with respect to a provided reference supply. other external capaci- tors are required for operation. a temperature output is provided for compensation techniques. two digital self-test inputs electromechanically excite the sensor to test proper operation of both the sensor and the signal condi- tioning circuits. the ADXRS646-EP is available in a 7 mm 7 mm 3 mm cbga chip-scale package. additional application and technical infor- mation can be found in the ADXRS646-EP data sheet. functional block diagram figure 1. v dd agnd pgnd av cc st2 st1 temp v ratio r out cp1 cp2 cp3 cp4 cp5 sumj rateout demod 180k ? 1% 22nf 100nf 22nf 100nf 100nf 100nf drive amp mechanical sensor charge pump and voltage regulator c out 6v 6v 3v to 6v (adc ref) ac amp vga 25k ? @ 25c ADXRS646-EP 25k ? self-test 10046-001
adxrs646- ep enhanced product rev. 0 | page 2 of 12 table of contents features .............................................................................................. 1 enhanced product features ............................................................ 1 applications ....................................................................................... 1 general descript ion ......................................................................... 1 functional block diagram .............................................................. 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 absolute maxim um ratings ............................................................4 rate sensitive axis ........................................................................4 esd caution ...................................................................................4 pin configuration and function descriptions ..............................5 typical performance characteristics ..............................................6 outline dimensions ..........................................................................9 ordering guide .............................................................................9 revision history 10/ 1 2 revision 0: initial version
enhanced product adxrs646- ep rev. 0 | page 3 of 12 specifications all minimum and maximum specifications are guarant eed. typical specifications are not guaranteed. t a = 2 5c, v s = av cc = v dd = 6 v, v ratio = av cc , angular rate = 0/sec, bandwidth = 80 hz (c out = 0.01 f), i out = 100 a, 1 g , unless otherwise noted. table 1 . parameter test conditions /comments min typ max unit sensitivity 1 clockwise rotation is positive output measurement range 2 full - scale range over specifications range 250 300 /sec initial 8.5 9 9.5 mv//sec temperature drift 3 3 % nonlinearity best fit straight line 0. 0 1 % of fs null 1 null ? 40 c to +105c 2.7 3.0 3.3 v temperature drift 3 3 /sec linear acceleration effect any axis 0. 0 1 5 /sec/ g vibration rectification 25 g rms , 50 hz to 5 khz 0.0001 /s ec / g 2 noise performance rate noise density t a 2 5 c 0.01 /sec/ hz rate noise density t a 105 c 0.015 /sec/ hz resolution floor t a = 2 5 c , 1 minute to 1 hour in - run 12 /hr frequency response bandwidth 4 3 db user adjustable up to specification 1000 hz sensor resonant frequency 1 5.5 1 7.5 20 khz self - test 1 st1 rateout response st1 pin from logic 0 to logic 1 ? 50 /sec st2 rateout response st2 pin from logic 0 to logic 1 50 /sec st1 to st2 mismatch 5 ? 5 0.5 + 5 % logic 1 input voltage st1 pin or st2 pin 4 v logic 0 input voltage 2 v input impedance st1 pin or st2 pin t o common 40 50 100 k temperature sensor 1 v out at 25c load = 10 m 2.8 2. 9 3.0 v scale factor 6 25c, v ratio = 6 v 10 mv/ c loa d to v s 25 k load to common 25 k turn - on time 6 power on to 0.5/s ec of final with cp5 = 100 nf 50 ms output drive capability current drive for rated specifications 200 a capacitive load drive 1000 pf power supply operating voltage (v s ) 5.7 5 6 .00 6 . 2 5 v quiescent supply current 4 ma temperature range specified performance ? 55 +105 c 1 parameter is linearly ratiometric with v ratio . 2 measurement range is the maximum range possible, including output swing range, initial offset, sensitivity, offset drift, and sensitivity drift at 5 v supplies. 3 from +25c to ? 40 c or +25c to +105c. 4 adjusted by external capacitor, c out . reducing bandwidth below 0.01 hz does not result in further noise improvement. 5 self - test mismatch is described as (st2 + st1)/((st2 ? st1)/2). 6 based on characterization.
ADXRS646-EP enhanced product rev. 0 | page 4 of 12 absolute maximum ratings table 2. parameter rating acceleration (any axis, 0.5 ms) unpowered 10,000 g powered 10,000 g v dd , av cc ?0.3 v to +6.6 v v ratio av cc st1, st2 av cc output short-circuit duration (any pin to common) indefinite operating temperature range ?65c to +125c storage temperature range ?65c to +150c stresses above those listed under the absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. drops onto hard surfaces can cause shocks of greater than 10,000 g and can exceed the absolute maximum rating of the device. care should be exercised in handling to avoid damage. rate sensitive axis this is a z-axis rate-sensing device (also called a yaw rate- sensing device). it produces a positive going output voltage for clockwise rotation about the axis normal to the package top, that is, clockwise when looking down at the package lid. figure 2. rateout signal incr eases with clockwise rotation esd caution r a te axis longitudinal axis lateral axis + abcd g 1 7 ef a1 rate out rate in 4.75v 0.25v av cc = 5v v ratio /2 gnd 10046-002
enhanced product adxrs646- ep rev. 0 | page 5 of 12 pin configuration an d function descripti ons figure 3 . pin configuration table 3 . pin function descriptions pin no. mnemonic description 6d, 7d cp5 hv filter capacito r, 100 n f (5%) . 6a, 7b cp4 charge pump capacitor, 22 nf (5%) . 6c, 7c cp3 charge pump capacitor, 22 nf (5%) . 5a, 5b cp1 charge pump capacitor, 22 nf (5%) . 4a, 4b cp2 charge pump capacitor, 22 nf (5%) . 3a, 3b av cc positive analog supply. 1b, 2a rateout rate signal output. 1c, 2c sumj output amp summing junction. 1d, 2d d nc do not connect to this pin . 1e, 2e v ratio reference supply for ratiometric output. 1f, 2g agnd analog supply return. 3f, 3g temp temperature voltage output. 4f, 4g st2 self - test for sensor 2. 5f, 5g st1 self - test for sensor 1. 6g, 7f pgnd charge pump supply return. 6e, 7e v dd positive charge pump supply. pgnd st1 st2 tem p agnd v r a tio dnc sumj r a teout a v cc cp2 cp1 cp4 cp3 cp5 v dd g f e d c b a 7 6 5 4 3 2 1 notes 1. dnc = do not connect t o this pin. bot t om view 10046-003
adxrs646- ep enhanced product rev. 0 | page 6 of 12 typical performance characteristics n > 1000 for all typical performance plots, unless otherwise noted. figure 4 . null bias at 25c figure 5 . null drift over temperature (v ratio = 5 v) figure 6. n ull output over temperature, 16 parts in sockets (v ratio = 5 v) figure 7 . sensitivity at 25c figure 8 . sensitivity drift over temperature figure 9 . typical root allan deviation at 25c vs. averaging time 30 0 5 10 15 20 25 percent of popul a tion (%) ra teout (v) 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 3.15 3.20 3.25 10046-004 30 0 5 10 15 20 25 percent of popul a tion (%) drift (/sec/c) ?0.30 ?0.25 ?0.20 ?0.15 ?0.10 ?0.05 0 0.05 0.10 0.15 0.20 0.25 0.30 10046-005 3.5 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 nul l (v) temper a ture (c) ?60 ?40 ?20 0 20 40 60 80 100 120 140 10046-100 35 30 25 20 15 10 5 0 percent of popul a tion (%) sensitivit y (mv//sec) 8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 10046-010 40 35 30 25 20 15 10 5 0 percent of popul a tion (%) percent drift (%) ?10 ?8 ?6 ?4 ?2 0 2 4 6 8 10 12 14 16 18 20 10046-0 1 1 10046-012 1k 100 1 10 root allan devi a tion (/hour rms) a veraging time (seconds) 0.01 0.1 1 10 100 1k
enhanced product adxrs646- ep rev. 0 | page 7 of 12 figure 10 . st1 output change at 25c (v ratio = 5 v) figure 11 . st1 output change vs. temperature, 16 parts in sockets figure 12 . self - test mismatch at 25c (v ratio = 5 v) figure 13 . st2 output change at 25c (v ratio = 5 v) figure 14 . st2 output change vs. temperature, 16 parts in sockets figure 15 . adxrs646 - ep frequency response with a 2.2 khz output filter 25 0 5 10 15 20 percent of popul a tion (%) st1 (mv) ?650 ?630 ?610 ?590 ?570 ?550 ?530 ?510 ?490 ?470 ?450 ?430 ?410 ?390 ?370 ?350 10046-006 ?0.30 ?0.35 ?0.40 ?0.45 ?0.50 ?0.55 ?0.60 ?0.65 ?0.70 ?0.75 st1 (v) temper a ture (c) ?60 ?40 ?20 0 20 40 60 80 100 120 140 10046-104 70 60 50 40 30 20 10 0 percent of popul a tion (%) mism a tch (%) ?4 ?3 ?2 ?1 0 1 2 3 4 10046-008 25 0 5 10 15 20 percent of popul a tion (%) st2 (mv) 350 370 390 410 430 450 470 490 510 530 550 570 590 610 630 650 10046-007 0.75 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 st2 (v) temper a ture (c) ?60 ?40 ?20 0 20 40 60 80 100 120 140 10046-103 9 ?18 ?15 ?12 ?9 ?6 ?3 0 3 6 0 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 magnitude response (db) phase response (degrees) frequenc y (khz) 0.1 1 10 c out = 470pf magnitude phase 10046-101
adxrs646- ep enhanced product rev. 0 | page 8 of 12 figure 16 . v temp output at 25c (v ratio = 5 v) figure 17 . v temp output vs. temperature figure 18 . current consumption at 25c (v ratio = 5 v) 80 70 60 50 40 30 20 10 0 percent of popul a tion (%) v tem p output (v) 2.70 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 3.15 3.20 3.25 3.30 10046-009 4.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 v tem p (v) temper a ture (c) ?100 ?50 0 50 100 150 10046-102 35 30 25 20 15 10 5 0 percent of popul a tion (%) current consumption (ma) 2.8 2.9 3.0 3.1 3.2 3.3 3.4 10046-013
enhanced product ADXRS646-EP rev. 0 | page 9 of 12 outline dimensions figure 19. 32-lead ceramic ball grid array [cbga] (bg-32-3) dimensions shown in millimeters ordering guide model 1 temperature range package description package option adxrs646tbgz-ep C55c to +105c 32-lead ceramic ball grid array [cbga] bg-32-3 adxrs646tbgz-ep-rl C55c to +105c 32-lead ceramic ball grid array [cbga] bg-32-3 1 z = rohs compliant part. a b c d e f g 76543 top view detail a ball diameter 0.60 0.55 0.50 0.60 max 0.25 min coplanarity 0.15 21 * a1 corner index area 3.20 max 2.50 min * ball a1 identifier is gold plated and connected to the d/a pad internally via holes. 10-26-2009-b 7.05 6.85 sq 6.70 a1 ball corner bottom view detail a 0.80 bsc 4.80 bsc sq seating plane 3 .80 max
adxrs646- ep enhanced product rev. 0 | page 10 of 12 notes
enhanced product adxrs646- ep rev. 0 | page 11 of 12 notes
ADXRS646-EP enhanced product rev. 0 | page 12 of 12 notes ?2012 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d10046-0-10/12(0)
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