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preliminary data this is preliminary information on a new product now in deve lopment or undergoing evaluation. details are subject to change without notice. march 2011 doc id 018584 rev 1 1/11 11 L3G462A mems motion sensor: 625 dps full scale - 3-axis analog gyroscope features 625 dps full scale wide supply voltage range 2.4 v to 3.6 v embedded power-down and sleep mode to save power consumption and shorten turn-on time integrated temperature sensor embedded low pass filter high shock survivability extended operating temperature range (-40 c to 85 c) ecopack ? rohs and ?green? compliant applications gaming and virtual reality input devices motion control with mmi (man-machine interface) gps navigation systems appliances and robotics description the L3G462A is a low-power 3-axis angular rate sensor. it includes a sensing element and an ic interface able to provide the measured angular rate to the external world through three analog outputs. the sensing element is manufactured using a dedicated micromachining process developed by st to produce inertial sensors and actuators on silicon wafers. the ic interface is manufactured using a cmos process that allows a high level of integration to design a dedicated circuit which is trimmed to better match the sensing element characteristics. the L3G462A is available in a plastic land grid array (lga) package and can operate within a temperature range from -40 c to +85 c. lga-16 (4x4x1.1 mm) table 1. device summary order code temperature range (c) package packing L3G462A -40 to +85 lga-16 (4x4x1.1) tray L3G462Atr -40 to +85 lga-16 (4x4x1.1) tape and reel www.st.com
contents L3G462A 2/11 doc id 018584 rev 1 contents 1 block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.4.1 sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.4.2 zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.5 sleep mode and power-down mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.6 soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
L3G462A block diagram and pin description doc id 018584 rev 1 3/11 1 block diagram and pin description 1.1 pin description figure 1. pin connection table 2. pin description pin# name function 1 nc internally not connected 2 ms1 mode selection pin 1 3 res reserved. connect to gnd 4 out_y yaw axis angular rate output 5 out_r roll axis angular rate output 6 out_p pitch axis angular rate output 7 vdd power supply 8 res reserved. leave unconnected 9 res reserved. leave unconnected 10 ms2 mode selection pin 2 11 res reserved. leave unconnected 12 gnd 0 v supply voltage 13 gnd 0 v supply voltage 14 cap charge pump capacitor connection pin 15 vtemp temperature sensor output 16 vdd power supply (top view) direction s of the detectable angular rate s x m s 1 re s out_y re s m s 2 re s gnd vdd out_p out_r re s vcap vtemp vdd gnd 1 8 12 5 4 9 1 3 16 +? out_y +? out_r bottom view +? out_p nc am09244v1
mechanical and electrical specifications L3G462A 4/11 doc id 018584 rev 1 2 mechanical and electrical specifications 2.1 mechanical characteristics vdd = 3.0 v, t = 25 c unless otherwise noted (a) a. the product is factory calibrated at 3.0 v. t he operational power supply range is specified in table 4 . table 3. mechanical characteristics symbol parameter test condition min. typ. (1) max. unit fs measurement range 625 dps so sensitivity 2 mv/dps sodr sensitivity change vs. temperature 0.017 %/c zrl zero-rate level 1.5 v offdr zero-rate level change vs. temperature (2) 0.04 dps/c nl non linearity (3) best fit straight line 0.5 % fs rn rate noise density 0.017 dps/ bw bandwidth 140 hz tso temperature sensor sensitivity -2 mv/c toff temperature sensor offset 27 c 640 mv tonpd turn-on time from pd to normal mode 150 ms tonsl turn-on time from sleep to normal mode (no external filter applied) 10 ms top operating temperature range -40 +85 c 1. typical specificat ions are not guaranteed. 2. min. and max. values have been estimated based on the measurements of the current gyros in production. 3. guaranteed by design. hz
L3G462A mechanical and electrical specifications doc id 018584 rev 1 5/11 2.2 electrical characteristics vdd=3.0 v, t=25 c unless otherwise noted (b) b. the product is factory calibrated at 3.0 v. table 4. electrical characteristics symbol parameter test condition min. typ. (1) max. unit vdd supply voltage 2.4 3.0 3.6 v idd supply current 6.9 ma iddsl supply current in sleep mode (2) selectable by digital interface 2ma iddpdn supply current in power-down mode selectable by digital interface 5 a to p operating temperature range -40 +85 c 1. typical specificat ions are not guaranteed. 2. sleep mode introduces a faster turn-on time related to power down mode.
mechanical and electrical specifications L3G462A 6/11 doc id 018584 rev 1 2.3 absolute maximum ratings stresses above those listed as ?absolute ma ximum ratings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device under these conditions is not implied. exposure to maximum rating conditions for extended periods may affect device reliability. table 5. absolute maximum ratings symbol ratings maximum value unit vdd supply voltage -0.3 to 4.8 v t stg storage temperature range -40 to +125 c sg acceleration g for 0.1 ms 10,000 g esd electrostatic discharge protection 2 (hbm) kv this is a mechanical shock sensitive device, improper handling can cause permanent damage to the part. this is an esd sensitive device, improper handling can cause permanent damage to the part.
L3G462A mechanical and electrical specifications doc id 018584 rev 1 7/11 2.4 terminology 2.4.1 sensitivity an angular rate gyroscope is a device that produces a positive-going digital output for counterclockwise rotation around the sensible axis considered. sensitivity describes the gain of the sensor and can be determined by applying a defined angular velocity to it. this value changes very little over temperature and time. 2.4.2 zero-rate level zero-rate level describes the actual output signal if there is no angular rate present. the zero-rate level of precise mems sensors is, to some extent, a result of stress to the sensor and therefore zero-rate level can slightly ch ange after mounting the sensor onto a printed circuit board or after exposing it to extensive mechanical stress. 2.5 sleep mode and power-down mode the L3G462A enables advanced power saving functionalities thanks to the different operating modes available. when the device is set in sleep mode configuration, the reading chain is completely turned off, allowing low power consumption. in this condition the device turn-on time is significantly reduced allowing simple external power cycling. the user can select the desired operating mode through two dedicated pins (ms1 and ms2). 2.6 soldering information the lga package is compliant with the ecopack ? rohs and ?green? standards. it is qualified for soldering heat resist ance according to jedec j-std-020. leave ?pin 1 indicator? unconnected during soldering. land pattern and soldering recommendations are available at www.st.com/mems . table 6. sleep mode and power-down mode configuration operating mode ms1 ms2 normal mode 0 0 power-down 1 1 sleep mode 0 1
application hints L3G462A 8/11 doc id 018584 rev 1 3 application hints figure 2. L3G462A electrical connections and external component values power supply decoupling capacitors (100 nf ceramic or polyester + 10 f aluminum) should be placed as near as possible to the device (common design practice). a 10 nf, 25 v class capacitor connected to pin 14 is required for proper working of the device. 9nf 100 nf vdd gnd gnd 10 f m s 1 out_y m s 2 re s gnd vdd out_p re s gnd cap 1 8 12 5 49 1 3 16 top view nc (top view) direction s of the detectable angular rate s x +? out_y +? out_r +? out_p cap gnd 10 nf (25v) 10 % vdd out_r vtemp re s gnd am09245v1
L3G462A package information doc id 018584 rev 1 9/11 4 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack specifications, grade definitions, and product status are available at: www.st.com. ecopack is an st trademark. figure 3. lga-16: mechanical data and package dimensions
revision history L3G462A 10/11 doc id 018584 rev 1 5 revision history table 7. document revision history date revision changes 15-mar-2011 1 initial release.
L3G462A doc id 018584 rev 1 11/11 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2011 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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