LPY403AL MEMS motion sensor: dual-axis pitch and yaw ±30 dps analog gyroscope Features ■ 2.7 V to 3.6 V single-supply operation ■ Wide operating temperature range (-40 °C to +85 °C) ■ High stability over temperature ■ Analog absolute angular-rate outputs ■ Two separate outputs for each axis (1x and 4x amplified) ■ Integrated low-pass filters ■ Low power consumption ■ Embedded power-down ■ Embedded self-test ■ Sleep mode ■ High shock and vibration survivability ■ ECOPACK® RoHS and “Green” compliant (see Section 6) LGA-28 (4x5x1 mm) The LPY403AL has a full scale of ±30 dps and is capable of detecting rates with a -3 dB bandwidth up to 140 Hz. The device includes a sensing element composed of a single driving mass, kept in continuous oscillation and capable of reacting, based on the Coriolis principle, when an angular rate is applied. ST's family of gyroscopes leverages on the mature and robust manufacturing process already used for the production of micro-machined accelerometers. Applications ■ Image stabilization for DVC and DSC ■ Motion control with user interface ■ Industrial and robotics ST is already in the field with several hundred million sensors which have received excellent acceptance from the market in terms of quality, reliability and performance. Description The LPY403AL is a low-power dual-axis micromachined gyroscope capable of measuring angular rate along pitch and yaw axes. It provides excellent temperature stability and high resolution over an extended operating temperature range (-40 °C to +85 °C). Table 1. A CMOS IC provides the measured angular rate to the external world through an analog output voltage, allowing high levels of integration and production trimming to better match sensing element characteristics. The LPY403AL is available in a plastic land grid array (LGA) package, which ST successfully pioneered for accelerometers.Today ST has the widest manufacturing capability and strongest expertise in the world for production of sensors in plastic LGA packages. Device summary Order code Temperature range (°C) Package Packing LPY403AL -40 to +85 LGA-28 (4x5x1) Tray LPY403ALTR -40 to +85 LGA-28 (4x5x1) Tape and reel October 2009 Doc ID 16577 Rev 1 1/14 www.st.com 14 Contents LPY403AL Contents 1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 4.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2 Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.3 Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.4 High pass filter reset (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.5 Sleep mode, self-test and power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.1 Output response vs. rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2/14 Doc ID 16577 Rev 1 LPY403AL 1 Block diagram and pin description Block diagram and pin description Figure 1. : Block diagram 8 #(!2'% !-0,)&)%2 $%-/$5,!4/2 37)4#(%$ #!0!#)4/2 ,/70!33 &),4%2 /PTIONAL ,0(0 &ILTER .OTAMPLIFIED FILTEREDOUTPUT8 8: $2)6).'-!33 '!). X X/548AMPLIFIED '!). X X/54:AMPLIFIED &EEDBACKLOOP : .OTAMPLIFIED FILT EREDOUTPUT : #(!2'% !-0,)&)%2 : 37)4#(%$ #!0!#)4/2 ,/70!33 &),4%2 /PTIONAL ,0(0 &ILTER $%-/$5,!4/2 4RIMMING CIRCUITS 2EFERENCE #LOCK 0HASEGENERATOR !-V Pin description 21 OUT X SLEEP/PD ST GND Res HP Z NC +Ω NC Pin connection Vref Figure 2. 28 20 1 LPY403AL NC (BOTTOM VIEW) NC FILTVDD +Ω x FILTVDD VCONT 4xIN X NC OUT Z NC VDD 4xIN Z FILTIN Y 15 6 NC FILTOUT Y/ OUT Y 7 NC VDD NC NC NC NC 14 4xOUTZ (TOP VIEW) DIRECTION OF THE DETECTABLE ANGULAR RATES 4xOUTX 1.1 AM03844v1 Doc ID 16577 Rev 1 3/14 Block diagram and pin description 4/14 LPY403AL Table 2. Pin description Pin # Pin name 1 OUT Z 2 NC Internally not connected 3 NC Internally not connected 4 NC Internally not connected 5 4xIN Z 6 NC 7 4xOUTZ 8 NC Internally not connected 9 Vdd Power supply 10 NC Internally not connected 11 NC Internally not connected 12 NC Internally not connected 13 NC Internally not connected 14 4xOUTX 15 NC 16 4xIN X Input of 4x amplifier 17 VCONT PLL filter connection pin #17 18 FILTVDD PLL filter connection pin #18 19 Vdd 20 OUTX 21 NC Internally not connected 22 Vref Reference voltage 23 NC Internally not connected 24 HP High-pass filter reset (logic 0: normal operation mode; logic1: external high-pass filter is reset) 25 Res Reserved. Leave unonnected or connect to Vdd 26 GND 0V supply voltage 27 ST 28 SLEEP/PD Analog function Z rate signal output voltage (not amplified) Input of 4x amplifier Internally not connected Z rate signal output voltage (amplified) X rate signal output voltage (amplified) Internally not connected Reserved. connect to Vdd X rate signal output voltage (not amplified) Self-test (see Table 6) Sleep mode / power-down mode (see Table 6) Doc ID 16577 Rev 1 LPY403AL Mechanical and electrical specifications 2 Mechanical and electrical specifications 2.1 Mechanical characteristics Vdd = 3 V, T = 25 °C unless otherwise noted(a) Table 3. Symbol FSA FS SoA So Mechanical characteristics Parameter Measurement range Sensitivity(2) Test condition Min. Typ.(1) Max. Unit 4x OUT (amplified) ±30 dps OUT (not amplified) ±120 dps 4x OUT (amplified) 33.3 mV/dps OUT (not amplified) 8.3 mV/dps Delta from 25°C 0.07 %/°C SoDr Sensitivity change vs. temperature Voff Zero-rate level(3) 1.5 V Vref Reference voltage 1.5 V OffDr Zero-rate level change Delta from 25°C vs. temperature 0.02 dps/°C ±1 % FS 140 Hz 250(4) mV 0.01 dps/√Hz NL Non linearity BW (3) Bandwidth Vst Self-test output change Rn Rate noise density Top Operating temperature range Best fit straight line -40 +85 °C 1. Typical specifications are not guaranteed. 2. Sensitivity and zero-rate level are not ratiometric to supply voltage. 3. The product is capable of measuring angular rates extending from DC to the selected BW. 4. Self test typical absolute value. a. The product is factory calibrated at 3 V. The operational power supply range is specified in Table 4. Doc ID 16577 Rev 1 5/14 Mechanical and electrical specifications 2.2 LPY403AL Electrical characteristics Vdd =3 V, T=25 °C unless otherwise noted(b) Table 4. Symbol Electrical characteristics Parameter Test condition Typ.(1) Max. Unit 2.7 3 3.6 V Vdd Supply voltage Idd Supply current SLEEP/PD pin connected to GND 6.8 mA Supply current sleep mode SLEEP/PD pin, ST pin connected to Vdd 2.1 mA Supply current in powerdown mode SLEEP/PD pin connected to Vdd IddSl IddPdn VST VPD Top 1 5 Logic 0 level 0 0.2*Vdd Logic 1 level 0.8*Vdd Vdd Logic 0 level 0 0.2*Vdd Logic 1 level 0.8*Vdd Vdd -40 +85 Self-test input µA V Power-down input V Operating temperature range 1. Typical specifications are not guaranteed. b. The product is factory calibrated at 3 V 6/14 Min. Doc ID 16577 Rev 1 °C LPY403AL 3 Absolute maximum ratings 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 5. Absolute maximum ratings Symbol Ratings Vdd Supply voltage Vin Input voltage on any control pin (SLEEP/PD, ST) TSTG A Storage temperature range Maximum value Unit -0.3 to 6 V -0.3 to Vdd +0.3 V -40 to +125 °C 3000 for 0.5 ms g 10000 for 0.1 ms g 2 (HBM) kV Acceleration ESD Electrostatic discharge protection 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 Doc ID 16577 Rev 1 7/14 Terminology 4 Terminology 4.1 Sensitivity LPY403AL An angular rate gyroscope is a device that produces a positive-going output voltage for counterclockwise rotation around the sensitive 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. 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 change after mounting the sensor onto a printed circuit board or after exposing it to extensive mechanical stress. This value changes very little over temperature and time. 4.3 Self-test Self-test allows testing of the mechanical and electrical part of the sensor, allowing the seismic mass to be moved by means of an electrostatic test-force. The self-test function is off when the ST pin is connected to GND. When the ST pin is tied to Vdd, an actuation force is applied to the sensor, emulating a definite Coriolis force. In this case the sensor output exhibits a voltage change in its DC level which is also dependent on the supply voltage. When ST is active, the device output level is given by the algebraic sum of the signals produced by the velocity acting on the sensor and by the electrostatic test-force. If the output signals change within the amplitude specified in Table 3, then the mechanical element is working properly and the parameters of the interface chip are within the defined specifications. 4.4 High pass filter reset (HP) The LPY403AL provides the possibility to reset the optional external high-pass filter by applying a high logic value to the HP pad. This procedure ensures faster response, especially during overload conditions. Moreover, this operation is recommended each time the device is powered. 4.5 Sleep mode, self-test and power-down The LPY403AL enables advanced power-saving features thanks to the availability of three different operating modes. When the device is set in a Sleep mode configuration, the reading chain is completely turned off, resulting in low power consumption. In this condition the device turn-on time is significantly reduced, allowing simple external power cycling. In accordance with the table below, the user can select the desired operating mode using two dedicated pins (ST and SLEEP/PD). 8/14 Doc ID 16577 Rev 1 LPY403AL Terminology Table 6. Sleep mode and Power-down mode configuration Operating mode ST pin SLEEP/PD pin Normal mode 0 0 Power-down 0 1 Self-test 1 0 Sleep mode 1 1 Doc ID 16577 Rev 1 9/14 Application hints Application hints LPY403AL electrical connections and external component values : 4/06)%7 $)2%#4)/./&4(% $%4%#4!",% !.'5,!22!4%3 .OTAMPLIFIED FILTEREDOUTPUT: 6REF & # # .OTAMPLIFIED FILTEREDOUTPUT8 '.$ .# &),46$$ .# 2 # ,09!, 4OP6IEW .# 2 N& 2 '.$ .# X 2ES : (0 '.$ '.$ 6DD .# : 34 Figure 3. 3,%%00$ 5 LPY403AL &),46$$ 6#/.4 # 2 &),4).9 .# .# X/548 4YPICALVALUES 2-/HM #U& 2K/HM #N&TOU& 2K/HM #N& #N& 6REF '.$ .# 2ECOMENDED /PTIONAL ,OWPASSFILTER (IGHPASSFILTER .# &),4/549/549 .# .# .# 6REF X/54: '.$ # 6DD # &),46$$ 2 6#/.4 $IGITALSIGNALS !-6 Power supply decoupling capacitors (100 nF ceramic or polyester + 10 µF aluminum) should be placed as near as possible to the device (common design practice). The LPY403AL allows band limiting of the output rate response through the use of an external low-pass filter (recommended) in addition to the embedded low-pass filter (ft = 140 Hz). The 4xOUTX and 4xOUTZ are, respectively, OUTX and OUTZ amplified output lines, internally buffered to ensure low output impedance. If external low-pass filtering is not applied, it is mandatory to short-circuit pin 1 to pin 5 and pin 16 to pin 20, respectively, when amplified outputs are used. When only a non-amplified output is used (OUTX/OUTZ), it is recommended to set pin 5 and 16 to a fixed reference voltage (Vref). The LPY403AL IC includes a PLL (phase-locked loop) circuit to synchronize driving and sensing interfaces. Capacitors and resistors must be added at the FILTVDD and VCONT pins (as shown in Figure 3) to implement a low-pass filter. 10/14 Doc ID 16577 Rev 1 LPY403AL 5.1 Application hints Output response vs. rotation Figure 4. Output response vs. rotation : : : : : X : X 0OSITIVEROTATIONSASINDICATEDBYTHEARROWS INCREASEOUTPUTVALUEOVERZERORATELEVEL 3TEADYSTATEPOSITION X/548X/54:6 /548/54:6 DPSX/548X/54:63O! 6 DPS/548/54:63O 6 !-V 5.2 Soldering information The LGA package is compliant with the ECOPACK®, RoHS and “Green” standards. It is qualified for soldering heat resistance in accordance with JEDEC J-STD-020. Leave “pin 1 indicator” unconnected during soldering. Land pattern and soldering recommendations are available at www.st.com Doc ID 16577 Rev 1 11/14 Package information 6 LPY403AL 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 5. LGA-28: mechanical data and package dimensions A1 1.1 A2 0.855 A3 0.200 D1 3.850 4.000 4.150 E1 4.850 5.000 5.150 L1 3.75 L2 2.75 N1 0.500 M 0.075 P1 2.200 P2 1.700 T1 0.265 0.325 0.385 T2 0.19 0.250 0.310 d 0.200 k 0.050 h 0.100 LGA-28 (4x5x1mm) Land Grid Array Package 8181393A 12/14 Doc ID 16577 Rev 1 LPY403AL 7 Revision history Revision history Table 7. Document revision history Date Revision 29-Oct-2009 1 Changes Initial release. Doc ID 16577 Rev 1 13/14 LPY403AL 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 herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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