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):||19 October 2016|
|PDF File Size:||8.3 Mb|
|ePub File Size:||7.60 Mb|
|Price:||Free* [*Free Regsitration Required]|
An analog output can be reconstructed by filtering the duty cycle output. Estimation of Peak-to-Peak Noise When selecting a microcontroller it is helpful to have a counter timer port available.
ADXL Datasheet pdf – ±2 g Dual Axis Accelerometer – Analog Devices
When the accelerometer is perpendicular to gravity, its output will change nearly The sensitivity can be determined by adxll202 two measurements. The faster the counter clock, the higher the resolution of the duty cycle and the shorter the T2 period can be datasheft a given resolution. Phase sensitive demodulation techniques are then used to rectify the signal and determine the direction of the acceleration.
Electrostatic charges as high as V readily accumulate on the human body and test equipment and can discharge without detection.
The resulting movement of the beam allows the user to test if the accelerometer is functional. A buffer amplifier adsl202 recommended, and may be required in any case to amplify the analog output to give enough resolution with an 8-bit to bit converter. Output for 16 Parts REV. Outline of the Declaration of Independence.
The ADXLE architecture has datasheeg designed so that these calibrations take place in the software of the microcontroller used to decode the duty cycle signal. When one sensor is reading a maximum change in output per degree, the other is at its minimum. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
ADXL202 Data Sheet
Note that the accelerometer offset and sensitivity are datasgeet to the supply voltage. At this orientation its sensitivity to changes in tilt is highest. This technique requires only passive components. Its higher sensitivity The equation for the 3 datashfet bandwidth is: One Technology Way, P. It is recommended that the user limit bandwidth datasheeh the lowest frequency needed by the application, to maximize the resolution and dynamic range of the accelerometer. This section will outline a general design procedure and discuss the various trade-offs that need to be considered.
Typical Supply Current vs. 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. Typical X-Axis Zero g vs. A Information furnished by Analog Devices is believed to be accurate and reliable.
ADXL Data Sheet
Consult the appropriate Application Note. This filtering improves measurement resolution and helps prevent aliasing. These requirements will help to determine the accelerometer bandwidth, the speed of the microcontroller clock and the length of the T2 period.
The sensor is a surface micromachined polysilicon structure built on top of the silicon wafer. Decoding algorithms for various microcontrollers have been developed.
With the single pole roll-off characteristic, the typical noise of the ADXLE is determined by the following equation: The duty cycle period is adjustable from 0. Polysilicon springs suspend the structure over the surface of the wafer and provide a resistance against acceleration forces.
A proper design will take into account the application requirements for bandwidth, signal resolution and acquisition time, as discussed in the following sections. The second relates to the measurement resolution of the counter when decoding the duty cycle output.
Deflection of the structure is measured using a differential capacitor that consists of independent fixed plates and central plates attached to the moving mass. 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.
The user must filter the signal at this point to limit aliasing errors. Specifications subject to change without notice. The outputs are analog voltage or digital signals whose duty cycles ratio of pulsewidth to period are proportional to acceleration.
For low g applications, the force of gravity is the most stable, accurate and convenient acceleration reference available. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Capacitors must be added at these pins to implement low-pass filtering for antialiasing and noise reduction.
It contains a polysilicon surfacemicromachined sensor and signal conditioning circuitry to implement an open loop acceleration measurement architecture.
Thomas Jefferson, Declaration acxl202 Independence. The analog bandwidth may be further decreased to reduce noise and improve resolution. The following table shows some of the trade-offs.