View LIS3L02AQ5TR_6685196.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

preliminary data this is preliminary information on a new product now in development or undergoing evaluation. details are subject to change without notice. rev 1 july 2005 cd00059677 1/15 15 lis3l02aq5 mems inertial sensor: 3-axis - 2g/6g linear accelerometer features 4.5v to 5.5v single supply operation low power consumption 2g/6g user selectable full-scale 0.5mg resolution over 100hz bandwidth embedded self test and power down output voltage, offset and sensitivity ratiometric to the supply voltage high shock survivability eco-pack compliant description the lis3l02aq5 is a low-power 3-axis linear capacitive accelerometer that includes a sensing element and an ic interface able to take the information from the sensing element and to provide an analog signal to the external world. the sensing element, capable of detecting the acceleration, is manufactured using a dedicated process developed by st to produce inertial sensors and actuators in silicon. the ic interface is manufactured using a standard cmos process that allows high level of integration to design a dedicated circuit which is trimmed to better match the sensing element characteristics. the lis3l02aq5 has a user selectable full scale of 2g, 6g and it is capable of measuring accelerations over a bandwidth of 1.5 khz for all axes. the device bandwidth may be reduced by using external capacitances. a self-test capability allows to check the mechanical and electrical signal path of the sensor. the lis3l02aq5 is available in plastic smd package and it is specified over an extended temperature range of -40c to +85c. the lis3l02aq5 belongs to a family of products suitable for a variety of applications: ? mobile terminals ? gaming and virtual reality input devices ? free-fall detection for data protection ? antitheft systems and inertial navigation ? appliance and robotics. order codes qfn-44 part number temp range, c package packing lis3l02aq5 -40c to +85c qfn-44 tray LIS3L02AQ5TR -40c to +85c qfn-44 tape & reel www.st.com obsolete product(s) - obsolete product(s)
lis3l02aq5 2/15 cd00059677 contents 1 block diagram & pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 mechanical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 ic interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 obsolete product(s) - obsolete product(s)
lis3l02aq5 1 block diagram & pins description cd00059677 3/15 1 block diagram & pins description 1.1 block diagram figure 1. block diagram 1.2 pins description figure 2. pins connection (top view) demux s/h charge amplifier s/h mux y+ z+ y- z- voutx voutz routx routz trimming circuit clock s/h vouty routy x+ x- self test reference a direction of the detectable accelerations y 1 x nc nc nc gnd vdd vouty st voutx nc nc nc nc nc nc nc nc reserved reserved reserved nc nc reserved nc nc pd voutz fs reserved reserved reserved reserved nc reserved nc nc nc nc nc nc nc nc nc nc nc z lis3l02aq5 obsolete product(s) - obsolete product(s)
1 block diagram & pins description lis3l02aq5 4/15 cd00059677 table 1. pins description pin # pin name function 1 to 3 nc internally not connected 4 gnd 0v supply 5 vdd power supply 6 vouty output voltage, y-channel 7 st self test (logic 0: normal mode; logic 1: self-test) 8 voutx output voltage, x-channel 9-13 nc internally not connected 14 pd power down (logic 0: normal mode; logic 1: power-down mode) 15 voutz output voltage, z-channel 16 fs full scale selection (logic 0: 2g full-scale; logic 1: 6g full-scale) 17-18 reserved leave unconnected 19 reserved leave unconnected 20 reserved leave unconnected 21 nc internally not connected 22-23 reserved leave unconnected 24-25 nc internally not connected 26 reserved connect to vdd or gnd 27 reserved leave unconnected or connect to vdd 28 reserved leave unconnected or connect to gnd 29-44 nc internally not connected obsolete product(s) - obsolete product(s)
lis3l02aq5 2 mechanical and electrical specifications cd00059677 5/15 2 mechanical and electrical specifications 2.1 mechanical characteristics. table 2. mechanical characteristics 1 (temperature range -40c to +85c) all the parameters are specified @ vdd =5.0v, t = 25c unless otherwise noted symbol parameter test condition min. typ. 2 max. unit ar acceleration range 3 fs pin connected to gnd 1.8 2.0 g fs pin connected to vdd 5.4 6.0 g so sensitivity 4 full-scale = 2g vdd/5?10% vdd/5 vdd/5+10% v/g full-scale = 6g vdd/15?10% vdd/15 vdd/15+10% v/g sodr sensitivity change vs temperature delta from +25c 0.01 %/c voff zero-g level 4 t = 25c vdd/2-6% vdd/2 vdd/2+6% v offdr zero-g level change vs temperature delta from +25c 0.8 mg/c nl non linearity 5 best fit straight line full-scale = 2g x, y axis 0.3 1.5 % fs best fit straight line full-scale = 2g z axis 0.6 2% fs crossax cross-axis 6 2 4% an acceleration noise density vdd=5.0v; full-scale = 2g 50 vt self test output voltage change 7,8,9 t = 25c vdd=5.0v full-scale = 2g x axis -70 -140 -320 mv t = 25c vdd=5.0v full-scale = 2g y axis 70 140 320 mv t = 25c vdd=5.0v full-scale = 2g z axis 70 140 320 mv g hz ----------- obsolete product(s) - obsolete product(s)
2 mechanical and electrical specifications lis3l02aq5 6/15 cd00059677 note: 1 the product is factory calibrated at 5.0v. the device can be powered from 4.5v to 5.5v. voff, so and vt parameters will vary with supply voltage. 2 typical specifications are not guaranteed 3 guaranteed by wafer level test and measurement of initial offset and sensitivity 4 zero-g level and sensitivity are essentially ratiometric to supply voltage 5 guaranteed by design 6 contribution to the measuring output of the inclination/acceleration along any perpendicular axis 7 self test ?output voltage change? is defined as vout (vst=logic1) -vout (vst=logic0) 8 self test ?output voltage change? varies cubically with supply voltage 9 when full-scale is set to 6g, self-test ?output voltage change? is one third of the specified value 10 minimum resonance frequency fres=1.5khz. sensor bandwidth=1/(2* *110k ? *cload) with cload>1nf. fres sensing element resonance frequency 10 all axes 1.5 khz to p operating temperature range -40 +85 c wh product weight 0.2 gram table 2. mechanical characteristics 1 (continued) (temperature range -40c to +85c) all the parameters are specified @ vdd =5.0v, t = 25c unless otherwise noted symbol parameter test condition min. typ. 2 max. unit obsolete product(s) - obsolete product(s)
lis3l02aq5 2 mechanical and electrical specifications cd00059677 7/15 2.2 electrical characteristics note: 1 the product is factory calibrated at 5.0v 2 typical specifications are not guaranteed 3 minimum resonance frequency fres=1.5khz. sensor bandwidth=1/(2* *110k ? *cload) with cload>1nf table 3. electrical characteristics 1 (temperature range -40c to +85c) all the parameters are specified @ vdd =5.0v, t=25c unless otherwise noted symbol parameter test condition min. typ. 2 max. unit vdd supply voltage 4.5 5.0 5.5 v idd supply current mean value pd pin connected to gnd 1.0 1.5 ma iddpdn supply current in power down mode rms value pd pin connected to vdd 2.5 5 a vst self test input logic 0 level 0 0.8 v logic 1 level 2.2 vdd v rout output impedance 80 110 140 k ? cload capacitive load drive 3 320 pf to n tu r n -o n t i m e a t e x it from power down mode cload in f 550*cload+0.3 ms to p operating temperature range -40 +85 c obsolete product(s) - obsolete product(s)
2 mechanical and electrical specifications lis3l02aq5 8/15 cd00059677 2.3 absolute maximum ratings stresses above those listed as ?absolute maximum 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 4. absolute maximum ratings 2.4 terminology sensitivity describes the gain of the sensor and can be determined by applying 1g acceleration to it. as the sensor can measure dc accelerations this can be done easily by pointing the axis of interest towards the center of the earth, note the output value, rotate the sensor by 180 degrees (point to the sky) and note the output value again thus applying 1g acceleration to the sensor. subtracting the larger output value from the smaller one and dividing the result by 2 will give the actual sensitivity of the sensor. this value changes very little over temperature (see sensitivity change vs. temperature) and also very little over time. the sensitivity tolerance describes the range of sensitivities of a large population of sensors. zero-g level describes the actual output signal if there is no acceleration present. a sensor in a steady state on a horizontal surface will measure 0g in x axis and 0g in y axis whereas the z axis will measure +1g. the output is ideally for a 5.0v powered sensor vdd/2 = 2500mv. a deviation from ideal 0-g level (2500mv in this case) is called zero-g offset. offset of precise mems sensors is to some extend a result of stress to the sensor and therefore the offset can slightly change after mounting the sensor onto a printed circuit board or exposing it to extensive mechanical stress. offset changes little over temperature - see "zero-g level change vs. temperature" - the zero-g level of an individual sensor is very stable over lifetime. the zero-g level tolerance describes the range of zero-g levels of a population of sensors. symbol ratings maximum value unit vdd supply voltage -0.3 to 7 v vin input voltage on any control pin (fs, pd, st) -0.3 to vdd +0.3 v a pow acceleration (any axis, powered, vdd=3.3v) 3000g for 0.5 ms 10000g for 0.1 ms a unp acceleration (any axis, not powered) 3000g for 0.5 ms 10000g for 0.1 ms t stg storage temperature range -40 to +125 c esd electrostatic discharge protection 2kv hbm 200v mm 1500v cdm this is a mechanical shock sensitive device, improper handling can cause permanent damages to the part this is an esd sensitive device, improper handling can cause permanent damages to the part obsolete product(s) - obsolete product(s)
lis3l02aq5 2 mechanical and electrical specifications cd00059677 9/15 self test allows to test the mechanical and electrical part of the sensor. by applying a digital signal to the st input pin an internal reference is switched to a certain area of the sensor and creates a defined deflection of the moveable structure. the sensor will generate a defined signal and the interface chip will perform the signal conditioning. if the output signal changes with the specified amplitude than the sensor is working properly and the parameters of the interface chip are within the defined specifications. output impedance describes the resistor inside the output stage of each channel. this resistor is part of a filter consisting of an external capacitor of at least 320pf and the internal resistor. due to the high resistor level only small, inexpensive external capacitors are needed to generate low corner frequencies. when interfacing with an adc it is important to use high input impedance input circuitries to avoid measurement errors. note that the minimum load capacitance forms a corner frequency beyond the resonance frequency of the sensor. for a flat frequency response a corner frequency well below the resonance frequency is recommended. in general the smallest possible bandwidth for an particular application should be chosen to get the best results. obsolete product(s) - obsolete product(s)
3 functionality lis3l02aq5 10/15 cd00059677 3 functionality the lis3l02aq5 is a high performance, low-power, analog output 3-axis linear accelerometer packaged in a qfn package. the complete device includes a sensing element and an ic interface able to take the information from the sensing element and to provide an analog signal to the external world. 3.1 sensing element a proprietary process is used to create a surface micro-machined accelerometer. the technology allows to carry out suspended silicon structures which are attached to the substrate in a few points called anchors and are free to move in the direction of the sensed acceleration. to be compatible with the traditional packaging techniques a cap is placed on top of the sensing element to avoid blocking the moving parts during the moulding phase of the plastic encapsulation. when an acceleration is applied to the sensor the proof mass displaces from its nominal position, causing an imbalance in the capacitive half-bridge. this imbalance is measured using charge integration in response to a voltage pulse applied to the sense capacitor. at steady state the nominal value of the capacitors are few pf and when an acceleration is applied the maximum variation of the capacitive load is up to 100ff. 3.2 ic interface in order to increase robustness and immunity against external disturbances the complete signal processing chain uses a fully differential structure. the final stage converts the differential signal into a single-ended one to be compatible with the external world. the signals of the sensing element are multiplexed and fed into a low-noise capacitive charge amplifier that implements a correlated double sampling system (cds) at its output to cancel the offset and the 1/f noise. the output signal is de-multiplexed and transferred to three different s&hs, one for each channel and made available to the outside. the low noise input amplifier operates at 200 khz while the three s&hs operate at a sampling frequency of 66 khz. this allows a large oversampling ratio, which leads to in-band noise reduction and to an accurate output waveform. all the analog parameters (zero-g level, sensitivity and self-test) are ratiometric to the supply voltage. increasing or decreasing the supply voltage, the sensitivity and the offset will increase or decrease almost linearly. the self test voltage change varies cubically with the supply voltage. 3.3 factory calibration the ic interface is factory calibrated for sensitivity (so) and zero-g level (voff). the trimming values are stored inside the device by a non volatile structure. any time the device is turned on, the trimming parameters are downloaded into the registers to be employed during the normal operation. this allows the user to employ the device without further calibration. obsolete product(s) - obsolete product(s)
lis3l02aq5 4 application hints cd00059677 11/15 4 application hints figure 3. lis3l02aq5 electrical connection power supply decoupling capacitors (100nf ceramic or polyester + 10 f aluminum) should be placed as near as possible to the device (common design practice). the lis3l02aq5 allows to band limit voutx, vouty and voutz through the use of external capacitors. the re-commended frequency range spans from dc up to 1.5 khz. in particular, capacitors must be added at output pins to implement low-pass filtering for antialiasing and noise reduction. the equation for the cut-off frequency (f t ) of the external filters is: taking into account that the internal filtering resistor (r out ) has a nominal value equal to 110kohm, the equation for the external filter cut-off frequency may be simplified as follows: the tolerance of the internal resistor can vary typically of within its nominal value of 110k ? ; thus the cut-off frequency will vary accordingly. a minimum capacitance of 320 pf for c f (x, y, z) is required in any case. res res res vout z vout y 100nf cload z lis3l02aq5 10 f vdd vout x gnd gnd vdd gnd 1 44 34 33 11 12 22 23 direction of the detectable accelerations cload x cload y res res res y 1 x z (top view) optional optional optional pd fs st digital signals gnd gnd f t 1 2 r out c load xyz ,, () ?? --------------------------------------------------------------- - = f t 1.45 f c load xyz ,, () ----------------------------------- = 20% obsolete product(s) - obsolete product(s)
4 application hints lis3l02aq5 12/15 cd00059677 table 5. filter capacitor selection, c f (x,y,z). commercial capacitance value choose. 4.1 soldering information the qfn44 package is lead free and green package qualified for soldering heat resistance according to jedec j-std-020c. land pattern and soldering recommendations are available upon request. cut-off frequency capacitor value 1 hz 1500 nf 10 hz 150 nf 20 hz 68 nf 50 hz 30 nf 100 hz 15 nf 200 hz 6.8 nf 500 hz 3 nf obsolete product(s) - obsolete product(s)
lis3l02aq5 5 package information cd00059677 13/15 5 package information figure 4. qfn-44 mechanical data & package dimensions outline and mechanical data dim. mm inch min. typ. max. min. typ. max. a 1.70 1.80 1.90 0.067 0.071 0.075 a1 0.19 0.21 0.007 0.008 b 0.20 0.25 0.30 0.008 0.01 0.012 d 7.0 0.276 e 7.0 0.276 e 0.50 0.020 j 5.04 5.24 0.198 0.206 k 5.04 5.24 0.198 0.206 l 0.38 0.48 0.58 0.015 0.019 0.023 p 45 ref 45 ref qfn-44 (7x7x1.8mm) q uad f lat p ackage n o lead g m m detail "n" 34 44 11 1 n 22 12 23 33 44 1 detail g seating plane obsolete product(s) - obsolete product(s)
6 revision history lis3l02aq5 14/15 cd00059677 6 revision history date revision changes 14-july-2005 1 first issue. obsolete product(s) - obsolete product(s)
lis3l02aq5 cd00059677 15/15 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners ? 2005 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 - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com obsolete product(s) - obsolete product(s)

▲Up To Search▲

Price & Availability of LIS3L02AQ5TR

	To Download LIS3L02AQ5TR Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .