Features

2.16 V to 3.6 V power supply voltage

1.8V compatible iOS

lt; 1 mesh power consumption

± 2g/± ± 8G dynamic selection full label

I2C/SPI digital output interface

A programmable interrupt generator

Embedded click and double -click recognition

Embedded freedom Poor and Movement Detection

Embedded high -pass filter

Embedded self -test

10000 G High impact survival capabilities

conform to Ecopack #174; ROHS and ""Green"" standard (see section 9)

Application

Free fall detection

Action activation function

Game and virtual reality input equipment

Vibration monitoring and compensation

Description

LIS331DL, which belongs to ST sports sensor, is the smallest low -power three -axis acceleration meter with the smallest consumption. This device has a digital I2C/SPI serial interface standard output and intelligent embedded function. Sensing components can detect acceleration, and use the production inertial craft silicon sensor and actuator developed by special ST companies. The IC interface is the process of allowing the design of special circuits by CMOS to design special circuits in order to better match the characteristics of sensing components. LIS331DL has the user's dynamic function full range of the dynamic selection of ± 2g/± 8g. The output data rate measures the acceleration of 100 Hz or 400 Hz. The self -test function allows users to check the function of sensors in the final application. This device can be configured to generate inertia wake -up/free fall interrupt signal exceeding the programmable acceleration threshold at least one of the three axes. The timing of the threshold and interrupt generator is dynamically executed by the end user. The LIS331DL can be used for plastic grounding mesh compassion (LGA) and ensure that operation is -40 ° C to+85 ° C within the extended temperature range.

Mechanical and electrical specifications

Mechanical characteristics

Table 3. Mechanical characteristics@vdd u003d 2.5 V, T u003d 25 ° C, unless otherwise explained (1) [123 123 ]

1. The product was calibrated at 2.5V when the factory was left. The working power range is 2.16V to 3.6V.

2. Do not guarantee typical specifications

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

4. MSL3 typical zero G electricity after pre -processing Plagiarism

5. It can be eliminated by enabling the built -in high -pass filterShoot

6. If you use STM bits, the symbol values u200bu200bof all shafts will change

7. Self -check output will change with the change of power. ""Self-inspection output change"" is defined as output [lsb] (self-inspection positions on ctrl_reg1 u003d 1) -Eutment [lsb] (self-inspection of ctrl_reg1 u003d 0). 1LSB u003d 4.6G/256, 8 -bit, ± 2.3g full range

8. Due to the filtering of the device, when the self -test mode is enabled, the output data after 3/ODR reaches 99%

[ 123] 9.ODR is the output data rate. See Table 4

Chemical characteristics

Table 4. The electrical characteristics of VDD u003d 2.5 V, T u003d 25 ° C, unless there is another instructions (1)

1. The product is calibrated at 2.5V when the product is left. The working power range is 2.16V to 3.6V.

2. Do not guarantee typical specifications

3. In this case, you can remove the VDD measurement chain of VDD_IO without blocking the communication bus.

4. Diection frequency of filter

5. Time to obtain valid data after exiting the power loss mode

Absolutely maximum rated value

higher than ""absolutely absolute The stress of the 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.

Note: The power supply voltage on any needle foot must not exceed 6.0 v

The term

sensitivity

The sensitivity describes description The gain of the sensor can be accelerated to it by applying 1G and other methods. Because the sensor can measure the DC acceleration, it is possible to record the output value of the interested axis to the center of the earth, to rotate the sensor by 180 degrees (pointing to the sky) and record the output value again. By doing so, the sensor applies ± 1 g acceleration. Sumid one with a small output value from it, divide the result 2 to get the actual sensitivity of the sensor. This temperature and time change very little. The sensitivity tolerance describes the sensitivity range of a large number of sensors.

Zero gravity level

Zero -G level offset (Tyoff) describes the deviation between the actual output signal and the ideal value. If there is no acceleration, the output signal is output. The horizontal surface is in a stable state, the X -axis and the Y axis are measured by 0G, while the Z axis measures 1g. Under the ideal situation of the output is in the middle of the sensor dynamic range (the contents of the output register 00h, the data is represented by the complement of 2number). In this case, the deviation from the ideal value is called zero -gravity offset. To a certain extent, the offset is MEMS sensor and therefore, after installing the sensor on the printing circuit, the offset may change slightly or expose it to a wide range of mechanical stress. The offset changes with a small temperature. Zero tolerance (TYG) describes the standard deviation of the level of zero -g levels of a set of sensors.

Self -inspection

Self -inspection allows to check its functions without moving the sensor. The self -inspection function is closed when the self -inspection position programming of the CTRL_Reg1 (control register 1) is ""0"". When the self -inspection position of Ctrl_reg1 is programmed as ""1"