ADXL datasheet, ADXL circuit, ADXL data sheet: AD – Low Cost +-2 g/+ g Dual Axis iMEMS Accelerometers with Digital Output,alldatasheet. ADXL 2g Dual Axis Accelerometer With Duty Cycle Outputs FEATURES 2- Axis Acceleration Sensor on a Single IC Chip Measures Static Acceleration as. ADXL Accelerometers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for ADXL Accelerometers.
|Published (Last):||4 November 2012|
|PDF File Size:||16.77 Mb|
|ePub File Size:||4.60 Mb|
|Price:||Free* [*Free Regsitration Required]|
The concept is to acquire a reading as quickly as possible and then shut down the ADXLE and the microcontroller until the next sample is needed.
The faster the counter clock, the higher the resolution of the duty cycle and the shorter the T2 period can be for a given resolution.
It contains a polysilicon surfacemicromachined sensor and signal conditioning circuitry to implement an open loop acceleration measurement architecture.
The device is designed datashfet operate at duty cycle periods between 0.
A minimum capacitance of pF for C X, Y is required in all cases. The actual resolution of the acceleration signal is, however, limited by the time resolution of the counting devices used to decode the duty cycle.
T2 Length of the total cycle. The user must filter the signal at this point to limit aliasing errors. Decoding algorithms for various microcontrollers have been developed. However, in some cases, especially where digital devices such as microcontrollers share the same power supply, digital noise on the supply may cause interference on the ADXLE output.
An analog output can be reconstructed by filtering the duty axxl202 output. The following table shows some of the trade-offs. adxk202
An acceleration will deflect the beam and unbalance the differential capacitor, resulting in an output square wave whose amplitude is proportional to acceleration. Typical Y-Axis Zero g vs. Filtering can be used to lower the noise floor and improve the resolution of the accelerometer. At this orientation its sensitivity to changes in tilt is highest.
Documents Flashcards Grammar checker. BoxNorwood, MAU. Although the ADXLE features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges.
Specific code sets, reference designs, and application notes are available from the factory. In either of the above approaches, the ADXLE can be turned on and off directly using a digital port pin on the microcontroller to power adx2l02 accelerometer without additional components. Typical X-Axis Zero g vs.
ADXL Datasheet(PDF) – Analog Devices
Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Electrostatic charges as high as V readily accumulate datsaheet the human body and test equipment and can discharge without detection. Supply 0 g Offset vs. One Technology Way, P.
The outputs are analog voltage or digital signals whose duty cycles ratio of pulsewidth to period are proportional to acceleration.
The advantage of this method is that the full 5 kHz bandwidth of the accelerometer is available to the user. ST The ST pin controls the self-test feature.
Application notes outlining algorithms for calculating acceleration from duty cycle and automated calibration routines are available from the factory.
A proper design will take into account the application requirements for bandwidth, signal resolution and acquisition time, as discussed in the following sections. An accelerometer uses the force of gravity as an input vector to determine orientation of an object in space. An op amp follower may be required to buffer this pin.
ADXL202 Data Sheet
Datashheet ADXLE architecture has been designed so that these calibrations take place in the software of the microcontroller used to decode the duty cycle signal. Some key points are presented here. The advantage of this method is an output scale factor of approximately double the analog output. Table III is useful for estimating the probabilities of exceeding various peak values, given the rms value.