LSM303DLH STMicroelectronics, LSM303DLH Datasheet
LSM303DLH
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LSM303DLH Summary of contents
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... The LSM303DLH has a linear acceleration full-scale of ± ± ±8 g and a magnetic field full-scale of ±1.3 / ±1.9 / ±2.5 / ±4.0 / ±4.7 / ±5,6 / ±8.1 gauss, both fully selectable by the user. The ...
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... Pull-up resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.3 Digital interface power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.4 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.5 High current wiring effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7 Digital interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7.1 I2C serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7.1.1 2/47 Accelerometer sensor I2C - inter IC control interface . . . . . . . . . . . . . . 14 Magnetic field sensing I2C digital interface . . . . . . . . . . . . . . . . . . . . . . 15 I2C operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Doc ID 16941 Rev 1 LSM303DLH ...
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... LSM303DLH 7.1.2 7.1.3 8 Register mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 9 Registers description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9.1 Linear acceleration register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9.1.1 9.1.2 9.1.3 9.1.4 9.1.5 9.1.6 9.1.7 9.1.8 9.1.9 9.1.10 9.1.11 9.1.12 9.1.13 9.1.14 9.1.15 9.1.16 9.1.17 9.1.18 9.1.19 9.2 Magnetic field sensing register description . . . . . . . . . . . . . . . . . . . . . . . 39 9.2.1 9.2.2 9.2.3 9.2.4 9 ...
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... Contents 10 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 4/47 Doc ID 16941 Rev 1 LSM303DLH ...
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... LSM303DLH List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 3. Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 5. I2C slave timing values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 6. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 7. Magnetic ST (positive bias Table 8. Operational mode and power supply for magnetic field sensing . . . . . . . . . . . . . . . . . . . . 21 Table 9. Serial interface pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 10 ...
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... Table 65. Magnetic sensor operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Table 66. OUTXH_M register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Table 67. OUTXL_M register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 68. OUT_YH_M register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 69. OUT_YL_M register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 70. OUTZH_M register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 71. OUTZL_M register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 72. SR register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Table 74. IRA_REG_M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Table 75. IRB_REG_M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Table 76. IRC_REG_M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Table 77. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6/47 Doc ID 16941 Rev 1 LSM303DLH ...
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... LSM303DLH List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 2. Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 3. I2C slave timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 4. LSM303DLH electrical connection 1 - recommended for I2C fast mode . . . . . . . . . . . . . . 20 Figure 5. LSM303DLH electrical connection Figure 6. LGA-28: mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Doc ID 16941 Rev 1 List of figures 7/47 ...
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... Block diagram and pin description 1 Block diagram and pin description 1.1 Block diagram Figure 1. Block diagram 8/47 Doc ID 16941 Rev 1 LSM303DLH ...
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... LSM303DLH 1.2 Pin description Figure 2. Pin connection Block diagram and pin description Doc ID 16941 Rev 1 9/47 ...
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... SCL_A Linear acceleration signal interface I SDA_A Linear acceleration signal interface I INT1 Inertial interrupt 1 INT2 Inertial interrupt 2 Reserved Connect to GND Doc ID 16941 Rev 1 LSM303DLH Function 2 C less significant bit of the device 2 C bus 2 C serial data (SDA serial clock (SCL serial clock (SCL) ...
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... LSM303DLH 2 Module specifications 2.1 Mechanical characteristics @ Vdd = 2 °C unless otherwise noted Table 3. Mechanical characteristics Symbol Parameter Linear acceleration LA_FS measurement range M_FS Magnetic measurement range LA_So Linear acceleration sensitivity M_GN Magnetic gain setting a. The product is factory calibrated at 2.5 V. The operational power supply range is from 2 3.3 V. ...
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... X, Y axis Positive bias mode, GN bits set to 100 on Z axis Vdd = 3 V Sensitivity starts to degrade. User S/R pulse to restore sensitivity -30 (Table . 1LSb=4g/4096 at 12bit representation, ±2 g full-scale (CTRL_REG4 ST bit=0) Doc ID 16941 Rev 1 LSM303DLH (1) Typ. Max. Unit ±0.01 %/°C g ± ±0.1 m /° ...
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... LSM303DLH 2.2 Electrical characteristics @ Vdd = 2 °C unless otherwise noted. Table 4. Electrical characteristics Symbol Parameter Vdd Supply voltage Accelerometer module power Vdd_IO_A supply for I/O Magnetic module digital power Vdd_dig_M supply Magnetic module I Vdd I2C Bus supply Current consumption in normal Idd (2) mode ...
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... C - inter IC control interface 2 ( standard mode Min Max 0 100 4.7 4.0 250 0.01 3.45 1000 20 + 0.1C 300 20 + 0.1C 4 4.7 4 4.7 (b) Doc ID 16941 Rev 1 LSM303DLH 2 ( fast mode Unit Min Max 0 400 KHz 1.3 µs 0.6 100 ns 0.01 0.9 µs (2) 300 b ns (2) 300 b 0.6 0.6 µ ...
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... LSM303DLH 2.3.2 Magnetic field sensing I This magnetic sensor IC has a 7-bit serial address and supports I and fast modes (100 kHz and 400 kHz, respectively), but does not support high-speed mode (Hs). External pull-up resistors are required to support the standard and fast modes. Depending ...
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... 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. 16/47 Ratings Doc ID 16941 Rev 1 LSM303DLH Maximum value Unit -0.3 to Vdd_IO +0 3,000 for 0 10,000 for 0 ...
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... The “sleep-to-wakeup” function, in conjunction with low-power mode, allows further reduction of system power consumption and the development of new smart applications. The LSM303DLH may be set to a low-power operating mode, characterized by lower date rate refreshing. In this way the device, even if sleeping, continues sensing acceleration and generating interrupt requests ...
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... IC interfaces are realized using a CMOS technology that allows the design of a dedicated circuit which is trimmed to better match the sensing element characteristics. The LSM303DLH features two data-ready signals (RDY) which indicate when a new set of measured acceleration data and magnetic data are available, thus simplifying data synchronization in the digital system that uses the device ...
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... LSM303DLH By placing the mode register into single-conversion mode (0x01), two data acquisition cycles are made on each magnetic vector. The first acquisition is a set pulse followed shortly by measurement data of the external field. The second acquisition has the offset strap excited in the positive bias mode to create about a 0 ...
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... Application hints 6 Application hints Figure 4. LSM303DLH electrical connection 1 - recommended for I Figure 5. LSM303DLH electrical connection 2 20/47 Doc ID 16941 Rev 1 LSM303DLH 2 C fast mode ...
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... LSM303DLH 6.1 External capacitors The C1 and C2 external capacitors should have a low SR value ceramic type construction. Reservoir capacitor C1 is nominally 4.7 µF in capacitance, with the set/reset capacitor C2 nominally 0.22 µF in capacitance. The device core is supplied through the Vdd line. Power supply decoupling capacitors (C4=100 nF ceramic, C3=10 µ ...
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... High current in wiring and printed circuit traces can be the cause of errors in magnetic field measurements for compassing. Conducto-generated magnetic fields add to earth’s magnetic field, creating errors in compass heading computation. Keep currents that are higher than few millimeters further away from the sensor IC. 22/47 Doc ID 16941 Rev 1 LSM303DLH ...
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... LSM303DLH 7 Digital interfaces The registers embedded inside the LSM303DLH are accessible through two separate I serial interfaces: one for the accelerometer core and the other for the magnetometer core. The two interfaces can be connected together on the PCB. Table 9. Serial interface pin description ...
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... The I C embedded inside the LSM303DLH behaves like a slave device and the following protocol must be adhered to. After the start condition (ST) a slave address is sent. Once a slave acknowledge (SAK) has been returned, an 8-bit sub-address (SUB) is transmitted: the 7 LSb represent the actual register address while the MSB enables address auto-increment. ...
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... The Serial Clock (SCL_M) and Serial Data (SDA_M) lines have optional internal pull-up resistors, but require resistive pull-up (Rp) between the master device (usually a host microprocessor) and the LSM303DLH. Pull-up resistance values of about 10 kΩ are recommended with a nominal 1.8 V digital supply voltage (Vdd_dig_M). ...
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... To minimize the communication between the master and magnetic digital interface of the LSM303DLH, the address pointer is updated automatically without master intervention. This automatic address pointer update has two additional features. First, when address 12 or higher is accessed the pointer updates to address 00, and secondly when address 09 is reached, the pointer rolls back to address 03 ...
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... LSM303DLH 8 Register mapping The tables given below provide a listing of the 8-bit registers embedded in the device and the related addresses: Table 17. Register address map Name address Reserved (do not modify) CTRL_REG1_A TAB.13 CTRL_REG2_A TAB.13 CTRL_REG3_A TAB.13 CTRL_REG4_A TAB.13 CTRL_REG5_A TAB.13 HP_FILTER_RESET_A TAB.13 REFERENCE_A TAB ...
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... Their content is automatically restored when the device is powered up. 28/47 Register address Slave Type Hex Doc ID 16941 Rev 1 LSM303DLH Default Comment Binary 00000100 output 00000101 output 00000110 output 00000111 output 00001000 output 00001001 00000000 00001010 01001000 00001011 00110100 00001100 00110011 ...
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... LSM303DLH 9 Registers description The device contains a set of registers which are used to control its behavior and to retrieve acceleration data. The register address, composed of 7 bits, is used to identify them and to write the data through the serial interface. 9.1 Linear acceleration register For linear acceleration sensors, the default (factory) 7-bit slave address is 001100xb. ...
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... Power mode selection 1 0 Low-power 1 1 Low-power 0 0 Low-power 0 1 Low-power 1 0 Low-power Output data rate [Hz] DR0 ODR 100 0 400 1 1000 HPM0 FDS Doc ID 16941 Rev 1 Output data rate [Hz] ODR 0 Low-pass filter cut-off frequency [Hz 292 780 HPen2 HPen1 HPCF1 Table 24) LSM303DLH LP HPCF0 ...
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... LSM303DLH internal registers related to trimming functions to permit good device behavior. If, for any reason, the content of the trimming registers was changed sufficient to use this bit to restore the correct values. When the BOOT bit is set to ‘1’ the content of internal Flash is copied to the corresponding internal registers and is used to calibrate the device. These values are factory-trimmed and are different for every accelerometer ...
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... Self-test sign. Default value: 00. STsign (0: self-test plus; 1 self-test minus) Self-test enable. Default value (0: self-test disabled; 1: self-test enabled) 32/47 I1(2)_CFG0 0 1 Interrupt 1 source OR interrupt 2 source 0 1 FS1 FS0 STsign Doc ID 16941 Rev 1 LSM303DLH INT 1(2) Pad Interrupt 1 (2) source Data ready Boot running 0 ST --- ...
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... LSM303DLH The BDU bit is used to inhibit output register updates between the reading of the upper and lower register parts. In default mode (BDU = ‘0’), the lower and upper register parts are updated continuously not certain to read faster than output data rate recommended to set BDU bit to ‘1’. In this way, after the reading of the lower (upper) register part, the content of that output register is not updated until the upper (lower) part is read also ...
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... X-axis acceleration data. The value is expressed as two’s complement. 9.1.10 OUT_Y_L_A (2Ah), OUT_Y_H_A (2Bh) Y-axis acceleration data. The value is expressed as two’s complement. 9.1.11 OUT_Z_L_A (2Ch), OUT_Z_H_A (2Dh) Z-axis acceleration data. The value is expressed as two’s complement. 34/47 YOR XOR ZYXDA Doc ID 16941 Rev 1 LSM303DLH ZDA YDA XDA ...
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... LSM303DLH 9.1.12 INT1_CFG_A (30h) Table 38. INT1_CFG_A register AOI 6D Table 39. INT1_CFG_A description AND/OR combination of interrupt events. Default value: 0. AOI (See 6 direction detection function enable. Default value (See Enable interrupt generation on Z high event. Default value: 0 ZHIE (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold) Enable interrupt generation on Z low event ...
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... INT1_THS register 0 THS6 Table 44. INT1_THS description THS6 - THS0 9.1.15 INT1_DURATION_A (33h) Table 45. INT1_DURATION_A register 0 D6 Table 46. INT2_DURATION_A description 36/ THS5 THS4 Interrupt 1 threshold. Default value: 000 0000 D5 D4 Duration value. Default value: 000 0000 Doc ID 16941 Rev 1 LSM303DLH THS3 THS2 THS1 THS0 D0 ...
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... LSM303DLH The bits set the minimum duration of the Interrupt 2 event to be recognized. Duration steps and maximum values depend on the ODR chosen. 9.1.16 INT2_CFG_A (34h) Table 47. INT2_CFG_A register AOI 6D Table 48. INT2_CFG_A description AND/OR combination of interrupt events. Default value: 0. AOI (See table below) 6 direction detection function enable ...
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... INT2_THS register 0 THS6 Table 53. INT2_THS description THS6 - THS0 9.1.19 INT2_DURATION_A (37h) Table 54. INT2_DURATION_A register 0 D6 Table 55. INT2_DURATION_A description 38/ THS5 THS4 Interrupt 1 threshold. Default value: 000 0000 D5 D4 Duration value. Default value: 000 0000 Doc ID 16941 Rev 1 LSM303DLH THS3 THS2 THS1 THS0 D0 ...
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... LSM303DLH The bits set the minimum duration of the Interrupt 2 event to be recognized. Duration time steps and maximum values depend on the ODR chosen. 9.2 Magnetic field sensing register description The magnetometer core contains a set of registers which are used to control its behavior and to retrieve magnetic field data. The register’s address, composed of 8 bits, is used to identify them and to read/write the data through the serial interface ...
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... Gain X/Y and Sensor input Z field range [Gauss] [LSB/Gauss] 1 ±1.3 1055 0 ±1.9 795 1 ±2.5 635 0 ±4.0 430 1 ±4.7 375 0 ±5.6 320 1 ±8.1 230 Doc ID 16941 Rev 1 LSM303DLH Gain Z Output range [LSB/Gauss] 950 710 570 0xF800–0x07FF 385 (-2048–2047) 335 285 205 0 ...
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... LSM303DLH the first bit of the data stream. The number in parentheses indicates the default value of that bit. Table 63. MR_REG 0 0 Table 64. MR_REG description MR7 to MR2 These bits must be cleared for correct operation MR1 to MR0 Mode select bits. These bits select the operation mode of this device. ...
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... This requirement also 42/47 DXRL5 DXRL4 DXRL3 DYRH5 DYRH4 DYRH3 DYRL5 DYRL4 DYRL3 DZRH5 DZRH4 DZRH3 DZRL5 DZRL4 DZRL3 Doc ID 16941 Rev 1 LSM303DLH DXRL2 DXRL1 DXRL0 DYRH2 DYRH1 DYRH0 DYRL2 DYRL1 DYRL0 DZRH2 DZRH1 DZRH0 DZRL2 DZRL1 DZRL0 ...
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... LSM303DLH impacts DRDY and RDY, which cannot be cleared until new data is placed in all the output registers. Status register The status register (SR 8-bit read-only register. This register is used to indicate device status. SR0 through SR7 indicate bit locations, with SR denoting the bits that are in the status register ...
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... Registers description Table 76. IRC_REG_M 0 0 44/ Doc ID 16941 Rev 1 LSM303DLH ...
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... LSM303DLH 10 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 trademark. Figure 6. LGA-28: mechanical data and package dimensions Ref Dimensions mm Min ...
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... Revision history 11 Revision history Table 77. Document revision history Date 18-Dec-2009 46/47 Revision 1 First issue. Doc ID 16941 Rev 1 LSM303DLH Changes ...
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... LSM303DLH 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. ...