Features

3 magnetic field channels and 3 acceleration

channel

Full scale ± 1.3 to ± 8.1 Gauss magnetic field

± 2g/± ± 4G/± 8G/± 16G optional full label

16 -bit data output

I2C serial interface

Analog power supply voltage 2.16 V to 3.6 v

[ 123] Power off mode/low power consumption mode

2 independent programming interruptions

Free fall and motion detection generator

Embedded temperature sensor

] Embedded FIFO

6D/4D position detection

conforms to Ecopack #174; Rohs and ""Green"" standard

Application

Compensation compass

Map rotation

Location detection

Move activation function

Free fall detection

Click/Double -click to identify

Stepator

Intelligent power saving of handheld equipment

Show direction

Game and virtual reality input equipment

Affect recognition and record

Vibration monitoring and vibration monitoring and vibration monitoring and vibration monitoring and vibration monitoring and vibration monitoring and vibration monitoring and Compensation

Explanation

LSM303DLHC is a system packaging with 3D digital linear acceleration sensors and a three -dimensional digital magnetic sensor. The LSM303DLHC has a full -scale line acceleration ± 2g/± 4g/± 8g/± 16g, and the full range of the magnetic field is ± 1.3/± 1.9/± 2.5/± 4.7/± 5.6/± 8.1 Gauss. All users are available for optional users. LSM303DLHC includes a I2C serial bus interface support standard and fast mode 100 kHz and 400kHz. The system can be configured to pass through inertial wake -up/free falling incident and equipment itself. The interrupt threshold and time generator can be used by end users. Magnetic and acceleration components can be enabled or entered separately. LSM303DLHC can use grid arrays (LGA) on plastic ground, and ensure that operation within the extended temperature range -40 ° C to+85 ° C

1. Do not guarantee typical specifications.

2. Verify through chip -level testing and initial offset and sensitivity measurement.

The typical zero -G level offset value after the pre -processing of MSL3.

4. Eliminate the offset by enabling the built -in high -pass filter.

The characteristics of the temperature sensor

@vdd u003d 2.5 V, T u003d 25 ° C, unless there is another instructions (b).

1. Do not guarantee typical specifications.

2.12 -bit resolution.

3.ODR configuration is shown in Table 72.

Absolute maximum rated value

Stress higher than the ""absolute maximum rated value"" may cause permanent damage to the device. This is just a stress rated value and the functional operation conditions of the device under these pressures are not implicit. Long -term exposure to the highest rating may affect equipment reliability.

This is a mechanical impact sensitive device, improper operation can cause permanent damage parts damage.

This is a static sensitive device, which will cause permanent damage to the part.

Linear acceleration sensitivity

Linear acceleration sensitivity describes the gain of acceleration sensor, which can be determined by applying 1G acceleration. Because the sensor can measure the DC acceleration, this can easily record the output value through the interesting axis of the center of the earth, rotate the sensor 180 degrees (pointing to the sky) and record the output value again. In this way, the sensor applies ± 1 g. The larger the output value of the minus method, the result is divided by 2, which is the sensitivity of the actual value sensor. This value changes very small with the temperature, and it is very small with time. Sensitivity tolerance describes the number of sensitive range sensors of a large number of people.

Zero G level

Zero G level offset (Tyoff) describes the deviation of the actual output signal and the ideal value. If there is no acceleration, the output signal is output. The horizontal surface is in a steady -state sensor X -axis measurement 0g, and the Y axis measures 0G, and the Z axis measurement 1G output is ideal in the middle of the sensor dynamic range (the content of the output register 00h, the data is represented by the complement of 2). The deviation from the ideal value is called zero -gravity offset. To some extent, offset is the result of the force of the MEMS sensor. Therefore, after installing the sensor on the printing circuit, the offset may change slightly or expose it to the extensive mechanical stress. The offset changes with a small temperature. The zero G-Class tolerance (Tyoff) describes the standard deviation of a set of zero -g levels of a set of sensors.

Function

LSM303DLHC is a 3D digital linear acceleration and 3D digital magnetic field detection sensor. The system includes a specific sensor element and the IC interface that can be measured at the same time provides a linear acceleration of the magnetic field to separate the digital output through an I2C serial interface. SensorIt is made of special micro -machine processing technology. At the same time, the integrated circuit interface is implemented with CMOS technology, which allows the design of circuits that are specially used to better match the characteristics of sensor components. The LSM303DLHC has two data ready signals (RDY). The acceleration data and magnetic field data used to indicate the measurement measurement are available. Therefore, simplify the synchronization of the data using the data to use the device. LSM303DLHC can also be configured to accelerate in programming the axis along the shaft.

Line acceleration working mode

LSM303DLHC provides two different acceleration operation modes, which reports ""normal mode"" and ""low power consumption mode"". Normal mode ensures high resolution, and low -power mode further reduces current consumption. Table 8 summarizes how to choose the operation mode.

Factory calibration

IC interface has performed a linear acceleration sensitivity (LA 帴 SO) and linear acceleration at the factory (LA 峎 Tyoff). The fine -tuning value is stored inside the device by non -easy -to -sex memory. After the device is turned on at any time, the fine -tuning parameter is downloaded to the register and used in the normal operation period. This allows users to calibrate further use of equipment.

Capacitors

C1 and C2 external capacitors should be low SR value ceramic structure (typical. Program value 200 MOHM). The nominal capacitor of the storage tank capacitor C1 is 4.7 μF, and the/reset capacitor C2 nominal capacitor is 0.22 μF. The core of the device is powered by VDD wire. Power -coupled capacitor (C4 u003d 100 NF ceramics, C3 u003d 10 μF Al) should be as close to the power plug -in equipment as much as possible (general design practice). All voltage and grounding power supply must present the normal behavior of IC at the same time (see Figure 4). The function of the device and the acceleration/magnetic field data of the measurement can be selected and accessed through the I2C interface. The functions, thresholds, and timing of the two interrupt pins (INT 1 and INT 2) can be comprehensively programmed by the user through the I2C interface.

Pulling resistor

The pull -up resistor (recommended value of 10,000 euros) is installed on two I2C bus.

Digital interface power supply

This digital interface, dedicated to linear acceleration and magnetic field signals, is a standard power supply (VDD) or special power supply operation (video display).

Welding information

LGA packaging conforms to Ecopack #174;, ROHS and ""Green"" standards. According to Jedec J-Std-020, its welding heat resistance is qualified. Keep the ""pin 1 indicator"" during the welding process. The pad mode and welding recommendation can be.

Large current wiring effect

The high current in the circuit and printing circuit may be measured by magnetic fields for circular regulations. The magnetic field generated by the conductor will increase the magnetic field of the earth, causing the compass to calculate. Keep the current higher than 10 mA, and stay away from the sensor IC a few millimeters.

Digital interface

The registers embedded in LSM303DLHC can access serial interfaces through two independent I2C access, one for acceleration meter core, and one for magnetic strong meter magnetic core.

I2C serial interface

LSM303DLHC I2C is the bus from the bus. I2C can be read back to the register. The following table gives relevant I2C terms.

There are two signals related to the I2C bus, serial clock line (SCL) and serial data cable (SDA). The two -way sending lines are used to receive data to/from the interface.

I2C operation

The transaction on the bus was activated by the start (ST) signal. The start -up condition is defined as the high -power conversion of the high -power data line at high electricity lines. After that, this has been transmitted by the main control, and the bus is considered busy. The data sent by the next byte of the data after starting the condition contains the first 7 -bit and bit of the machine of the machine. When a address is sent, each device in the system compares the starting conditions and its address. If they match, the equipment considers themselves. There must be confirmation data transmission. The transmitter must release the SDA line during the confirmation pulse. Then the receiver must lower the data cable to maintain a stable low level within the high cycle of the clock pulse. A receiver must generate a confirmation after each byte of the data. The behavior of I2C embedded in LSM303DLHC is similar to that from the device that must follow the agreement. After starting the condition (ST), send the slave address, and the answer from the machine (SAK) has been returned at one time to send an 8 -seat address (SUB); the 7 LSB represents the actual register address, and the MSB enable address is automatically increasing. If the MSB of the sub -field is ""1"