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):||16 June 2008|
|PDF File Size:||8.54 Mb|
|ePub File Size:||6.75 Mb|
|Price:||Free* [*Free Regsitration Required]|
Outline of the Declaration of Independence. The sensitivity can be determined by the two measurements.
When this pin is set to VDD, an electrostatic force is exerted on the beam of the accelerometer. The designer should have some idea of the required performance of the system in terms of: Filtering can be used to lower the noise floor and improve the resolution of the accelerometer. This section will outline a general design procedure and discuss the various trade-offs that need to be considered. Running the part at 3 V will reduce the supply current from 0.
Decoding algorithms for various microcontrollers have been developed. The advantage of this method is that the full 5 kHz bandwidth of the accelerometer is available to the user.
Output for 16 Parts REV. A single resistor sets the period for a complete cycle T2which can be set between 0. Typical Y-Axis Zero g vs. The analog bandwidth may be further decreased to reduce noise and improve resolution. Consult the appropriate Application Note. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result sdxl202 its use.
ADXL202 Data Sheet
A proper design will take into account the application requirements for bandwidth, signal resolution and acquisition time, as discussed in datssheet following sections. The second relates to the measurement resolution of the counter when decoding the duty cycle output.
The advantage of this method is an output scale factor of approximately double the analog output. At this point a pin is available on each channel to allow the user to set the signal bandwidth of the device by adding a capacitor. Care should be exercised in handling to avoid damage. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Estimation of Peak-to-Peak Noise When selecting a microcontroller it is helpful to adxk202 a counter timer port available. 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 the accelerometer without additional components.
Power Cycling When Using the Digital Output An alternative is to run the microcontroller at a higher clock rate and put it into shutdown between readings, allowing the use of the digital output.
ADXL Datasheet(PDF) – Analog Devices
BoxNorwood, MAU. Typical Darasheet Current vs. The outputs are analog voltage or digital signals whose duty cycles ratio of pulsewidth to period are proportional to acceleration. Run the accelerometer at a Lower Voltage, Down to 3 Datasueet. Note that the accelerometer offset and sensitivity are ratiometric to the supply voltage.
One Technology Way, P. Application notes outlining algorithms for calculating acceleration from duty cycle and automated calibration routines are available from the factory. An op amp follower may be required to buffer this pin. Although the ADXLE features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. ST The ST pin controls the self-test feature.
A Information furnished by Analog Devices is believed to be accurate and reliable. The user must filter the signal at this point to limit aliasing errors. This will result in greater dynamic error generated at the DCM.
The ADXLE architecture has been designed so that these calibrations take place in the software of the datasgeet used to decode the duty cycle signal. Documents Flashcards Grammar checker. The equation for the datashwet dB bandwidth is: 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.
With the single pole roll-off characteristic, the typical noise of the ADXLE is determined by the following equation: Duty Cycle Filtering An analog output can be reconstructed by filtering the duty cycle output. The microcontroller should have provisions for software calibration.
Often the peak value of the noise is desired. When one sensor is reading a maximum change in output per degree, the other is at datasheeet minimum. For low g applications, the force of gravity is the most stable, accurate and convenient acceleration reference available. Thomas Jefferson, Declaration of Independence. The offset and sensitivity are nominally: