LIS3L02AQ5 데이터 시트보기 (PDF) - STMicroelectronics
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LIS3L02AQ5 Datasheet PDF : 15 Pages
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LIS3L02AQ5
2 Mechanical and Electrical Specifications
Self Test allows to test the mechanical and electrical part of the sensor. By applying a digital
signal to the ST input pin an internal reference is switched to a certain area of the sensor and
creates a defined deflection of the moveable structure. The sensor will generate a defined
signal and the interface chip will perform the signal conditioning. If the output signal changes
with the specified amplitude than the sensor is working properly and the parameters of the
interface chip are within the defined specifications.
Output impedance describes the resistor inside the output stage of each channel. This
resistor is part of a filter consisting of an external capacitor of at least 320pF and the internal
resistor. Due to the high resistor level only small, inexpensive external capacitors are needed to
generate low corner frequencies. When interfacing with an ADC it is important to use high input
impedance input circuitries to avoid measurement errors. Note that the minimum load
capacitance forms a corner frequency beyond the resonance frequency of the sensor. For a flat
frequency response a corner frequency well below the resonance frequency is recommended.
In general the smallest possible bandwidth for an particular application should be chosen to get
the best results.
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