LY330ALH MEMS motion sensor: high performance ±300 dps analog yaw-rate gyroscope 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. 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. LGA-10 (3x5x1 mm) ST's family of gyroscopes leverages on the mature and robust manufacturing process already used for the production of micro-machined accelerometers. 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 Integrated low-pass filters Low power consumption Sleep mode Embedded power-down Embedded self-test High shock and vibration survivability ® ECOPACK RoHS and “Green” compliant • • • • • • • • • • • Applications Pointing devices, remote and game controllers Motion control with user interface GPS navigation systems 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. The LY330ALH 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. Table 1: Device summary Order code Temperature Package range (°C) Packing LY330ALH -40 to +85 LGA-10 (3x5x1) Tray LY330ALHTR -40 to +85 LGA-10 (3x5x1) Tape and reel Description The LY330ALH is a high performance low-power single-axis micro-machined gyroscope capable of measuring angular rate along the yaw axis. It provides excellent temperature stability and high resolution over extended operating temperature range (-40 °C to +85 °C). The LY330ALH has a full scale of ±300 dps and is capable of detecting rates with a -3 dB bandwidth up to 140 Hz. February 2010 DocID16568 Rev 2 1/16 www.st.com Contents LY330ALH Contents 1 Block diagram ..........................................................................................................5 2 Pin description .........................................................................................................6 3 Mechanical and electrical characteristics .............................................................7 3.1 Mechanical characteristics ............................................................................................7 3.2 Electrical characteristics ................................................................................................8 3.3 Absolute maximum ratings ............................................................................................8 4 Terminology ............................................................................................................10 4.1 4.2 4.3 4.4 Sensitivity ....................................................................................................................10 Zero-rate level .............................................................................................................10 Self-test .......................................................................................................................10 Sleep mode, self-test and power-down .......................................................................10 5 Application hints ....................................................................................................11 5.1 Output response vs. rotation .......................................................................................12 5.2 Soldering information ...................................................................................................12 6 Package information .............................................................................................13 6.1 LGA-10 package mechanical data ..............................................................................13 7 Revision history .....................................................................................................15 2/16 DocID16568 Rev 2 LY330ALH List of tables List of tables Table 1. Device summary .........................................................................................................................1 Table 2. Pin description ............................................................................................................................6 Table 3. Mechanical characteristics @ Vdd = 3 V, T = 25 °C unless otherwise noted .............................7 Table 4. Electrical characteristics @ Vdd =3 V, T=25 °C unless otherwise noted ...................................8 Table 5. Absolute maximum ratings .........................................................................................................8 Table 6. Sleep mode, self-test and power-down mode configuration ....................................................10 Table 7. LGA-10 (3x5x1 mm) package dimensions ...............................................................................13 Table 8. Document revision history ........................................................................................................15 DocID16568 Rev 2 3/16 List of figures LY330ALH List of figures Figure 1. Block diagram .........................................................................................................................11 Figure 2. Pin connection ..........................................................................................................................6 Figure 3. Electrical connections and external component values ..........................................................11 Figure 4. Steady state position ..............................................................................................................12 Figure 5. Output response vs. rotation ...................................................................................................12 Figure 6. LGA-10 (3x5x1 mm) mechanical data ....................................................................................13 4/16 DocID16568 Rev 2 LY330ALH 1 Block diagram Block diagram Figure 1: Block diagram DRIVING MASS Feedback loop +Ω z + CHARGE AMPLIFIER SWITCHED CAPACITOR LOW-PASS FILTE R CONT. TIME LP FILT ER OUT Z - DEMODULATOR GND REFERENCE TRIMMING CIRCUITS CLOCK PHASE GENERATOR AM03839v1 DocID16568 Rev 2 5/16 Pin description 2 LY330ALH Pin description Figure 2: Pin connection +Ω z Vdd RES ST VCONT 1 4 10 5 9 (TOP VIEW) DIRECTION OF THE DETECTABLE ANGULAR RATE GND RES 6 Vdd SLEEP/PD Vref OUTZ (BOTTOM VIEW) AM03840v1 Table 2: Pin description 6/16 Pin # Pin name Analog function 1 Vdd Power supply 2 ST Self-test (see "Sleep mode, self test and power-down mode configuration" table) 3 VCONT PLL filter connection 4 GND 0 V supply voltage 5 Res Leave unconnected or connect to Vdd 6 OUTZ Z axis output voltage 7 Vref Reference voltage 8 SLEEP/PD Sleep mode / power-down mode (see "Sleep mode, self test and power-down mode configuration" table) 9 Vdd Power supply 10 Res Leave unconnected or connect to Vdd DocID16568 Rev 2 LY330ALH Mechanical and electrical characteristics 3 Mechanical and electrical characteristics 3.1 Mechanical characteristics Table 3: Mechanical characteristics @ Vdd = 3 V, T = 25 °C unless otherwise noted Symbol Parameter FS Measurement range So Sensitivity SoDr Sensitivity change vs. temperature Voff Test condition Min. (1) Typ. Max. Unit ±300 dps 3.752 mV/dps 0.01 %/°C Zero-rate (3) level 1.5 V OffDr Zero-rate Delta from level change 25°C vs. temperature 0.02 dps/°C NL Non linearity ±1 % FS BW Bandwidth 140 Hz Vst Self-test output change 400 mV Rn Rate noise density 0.014 dps / √Hz Top Operating temperature range (2) Delta from 25°C Best fit straight line (3) (4) -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. Note: The product is factory calibrated at 3 V. The operational power supply range is specified in the Electrical characteristics table. DocID16568 Rev 2 7/16 Mechanical and electrical characteristics 3.2 LY330ALH Electrical characteristics Table 4: Electrical characteristics @ Vdd =3 V, T=25 °C unless otherwise noted Parameter Vdd Supply voltage Idd Supply current 4.2 mA IddSl Supply current sleep mode 2.2 mA IddPdn Supply current in power-down mode 5 µA Vst Self-test input Vpd Top Power-down input Test condition (1) Symbol Min. Typ. Max. Unit 2.7 3 3.6 V 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 Operating temperature range V V °C (1) Typical specifications are not guaranteed Note: The product is factory calibrated at 3 V. 3.3 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 5: Absolute maximum ratings 8/16 Symbol Ratings Maximum value Unit Vdd Supply voltage -0.3 to 6 V Vin Input voltage on any control pin (Sleep/PD, -0.3 to Vdd +0.3 ST) V A Acceleration 3000 for 0.5 ms g 10000 for 0.1 ms g DocID16568 Rev 2 LY330ALH Mechanical and electrical characteristics Symbol Ratings Maximum value Unit TSTG Storage temperature range -40 to +125 °C 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. DocID16568 Rev 2 9/16 Terminology LY330ALH 4 Terminology 4.1 Sensitivity 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 the Mechanical characteristics table, then the mechanical element is working properly and the parameters of the interface chip are within the defined specifications. 4.4 Sleep mode, self-test and power-down The device enables advanced power-saving features thanks to the availability of three different operating modes. In addition to standard normal mode and Power-down mode, 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). Table 6: Sleep mode, self-test and power-down mode configuration 10/16 Operating mode ST pin SLEEP/PD pin Normal mode 0 0 Sleep mode 0 1 Self-test 1 0 Power-down 1 1 DocID16568 Rev 2 LY330ALH 5 Application hints Application hints Figure 3: Electrical connections and external component values Supply 2.2Ohm 1 µF SLEEP/PD Vref 100 nF LDO OUT Z GND GND 9 10 6 5 TOP VIEW 4 1 GND +Ω z ST 10nF 470nF (TOP VIEW) DIRECTION OF THE DETECTA BLE ANGULAR RATE C2 10kOhm C1 R1 GND AM03841v1 Power supply decoupling capacitors should be placed in combination with an LDO regulator (common design practice). The device IC includes a PLL (phase-locked loop) circuit to synchronize driving and sensing interfaces. Capacitors and resistor must be added at VCONT pin 3 (see figure above) to implement a low-pass filter. DocID16568 Rev 2 11/16 Application hints 5.1 LY330ALH Output response vs. rotation Figure 4: Steady state position +Ω z Note: OUTZ = 1.5 V Figure 5: Output response vs. rotation +Ω z Note: Positive rotations as indicated by arrows increase output value over zero-rate level: OUTZ= 1.5 V + SoA*300 = 2.62 V 5.2 Soldering information ® The LGA package is compliant with the ECOPACK , RoHS and "Green" standard. It is qualified for soldering heat resistance according to JEDEC J-STD-020. Leave "pin 1 indicator" unconnected during soldering. Land pattern and soldering recommendations are available at www.st.com. 12/16 DocID16568 Rev 2 LY330ALH 6 Package information 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. 6.1 LGA-10 package mechanical data Figure 6: LGA-10 (3x5x1 mm) mechanical data 8161636B Table 7: LGA-10 (3x5x1 mm) package dimensions Ref. Dimensions mm Min. Typ. A1 Max. 1.100 A2 0.855 A3 0.200 D1 2.850 3.000 3.150 E1 4.850 5.000 5.150 L 0.635 L1 4.035 L2 2.200 N1 1.382 DocID16568 Rev 2 13/16 Package information LY330ALH Ref. Dimensions mm Min. 14/16 Typ. N2 1.100 M 0.100 P1 1.300 P2 0.500 T1 0.600 T2 0.700 T3 0.635 d 0.200 k 0.050 h 0.100 DocID16568 Rev 2 Max. LY330ALH 7 Revision history Revision history Table 8: Document revision history Date Revision Changes 29-Oct-2009 1 Initial release. 19-Feb-2010 2 Minor text changes and updated package information. DocID16568 Rev 2 15/16 LY330ALH Please Read Carefully Information in this document is provided solely in connection with ST products. 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