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.
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Capacitors must be added at these pins to implement low-pass filtering for antialiasing and noise reduction. The easiest way to null this offset is xatasheet a calibration factor saved on the microcontroller or by a user calibration for zero g. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
Documents Flashcards Grammar checker. The duty cycle period is adjustable from 0. It is recommended that the user limit bandwidth to the lowest frequency needed by the application, to maximize the resolution and dynamic range of the accelerometer. Application notes outlining algorithms for calculating acceleration from duty cycle and automated calibration routines are available from the factory. Duty Cycle Filtering An analog output can be reconstructed by filtering the duty cycle output.
The resulting movement of the beam allows the user to test if the accelerometer is functional.
ADXL Datasheet(PDF) – Analog Devices
Typical Supply Current vs. An analog output can be reconstructed by filtering the duty cycle output. Run the accelerometer at a Lower Voltage, Down to 3 V. When the accelerometer is perpendicular to gravity, its output will change nearly Filtering can be used to lower the noise floor and improve the resolution of the accelerometer.
The following table shows some of the trade-offs. BoxNorwood, MAU. This is a stress rating only; functional operation of the device at these or any other conditions above those indicate in the opera tional sections of this specification is not implied.
Care should be exercised in handling to avoid damage. A buffer amplifier is recommended, and may be required in any case to amplify the analog output to give enough resolution dxtasheet an 8-bit to bit converter. Its higher sensitivity Polysilicon springs suspend the structure over the surface of the wafer datashert provide a resistance against acceleration forces. Note that the accelerometer offset and sensitivity are ratiometric to the supply voltage. Peak-to-peak noise can only be estimated by statistical methods.
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. The sensitivity can be determined by the two measurements. Thomas Jefferson, Declaration of Independence. The ADXLE architecture has been designed so that these calibrations take place in the software of the microcontroller used to decode the duty cycle signal. Specifications subject to change without notice. The sensor is a surface micromachined polysilicon structure built on top of the silicon wafer.
At this dahasheet its sensitivity to changes in tilt is highest. The microcontroller should have provisions for software calibration. Typical X-Axis Zero g vs.
Power Cycle the accelerometer. Electrostatic charges as high as V readily accumulate on the human body and test equipment and can discharge without detection. One Technology Way, P. The accelerometer can measure static acceleration forces such as gravity, allowing it to be used as a tilt sensor. Running the part at 3 V will reduce the supply current from 0. A proper design will take into account the application requirements for bandwidth, signal resolution and acquisition time, as discussed in the following sections.
The equation for the 3 dB bandwidth is: The advantage of this method is an output scale datashdet of approximately double the analog output. Although the ADXLE features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges.
ADXL202 Data Sheet
Specific code sets, reference designs, and application notes are available from the factory. Outline of the Declaration of Independence. T2 does not have to be measured for every measurement cycle. When this pin is set to VDD, an electrostatic force is exerted on the beam of the accelerometer.
ST The ST pin controls the self-test feature. With the single pole roll-off characteristic, the dtaasheet noise of the ADXLE is determined by the following equation: For low g applications, the force of gravity is the most stable, accurate and convenient acceleration reference available. When the accelerometer is oriented on axis to gravity, i. The second relates to the measurement resolution of the counter when decoding the duty cycle output.
It need only be updated to account for changes due to temperature, a relatively slow process. In either of the above approaches, the ADXLE can be dataxheet on and off directly using a digital port pin on the microcontroller to power the accelerometer without additional components. The device is designed to operate at duty cycle periods between 0. 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.