ADXL345: FAQ

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  • ADXL345 internal filter

    Q Could you give us some more detail of the ADXL345 insite A The internal filter is as follows: 1. There is a single pole analog anti-aliasing filter at ~1.6kHz. 2. The digital filter is an IIR…
  • ADXL345 Magnetic Interferance?

    Q I still wonder about whether the sensors fulfill the demands of the MRI environment? It has to withstand a static magnetic field of 3 Tesla (i.e. it should not contain any ferromagnetic materials)…
  • ADXL345 performance in electro magnetic fields

    Q I want to use ADXL345 in airbone application and I am concerned about the performance in electro magnetic fields. But it seems there is no information about this in the datasheet. A The ADXL345…
  • ADXL345 power consumption

    Q We use a ADXL345 in a product were we used to have a power consumption around 42µA. In the latest shipment of this product we use the same components and firmware but the power consumption is around…
  • ADXL345 range configuration

    Q I have some questions about the 0x31 DATA_FORMAT register of our ADXL345. If I set DATA_FORMAT = 0x00, make the Gee Range = +/-2g, then I can get 1g = 256 and this is reasonable (2^10/4g=256) If I…
  • ADXL345 turn off Vs, while keeping Vddio powered, is this possible?

    Q ADXL345: Is it possible to turn off Vs, while keeping Vddio powered, to save power? A Yes but turning off Vs means reprogramming the entire part each time Vs is powerd-on. Standby mode is a better…
  • ADXL345 user-selectable g range and data rate

    Q 1. The accelerometer comes with user-selectable g ranges, e.g. +/- 2g, +/- 4g. How do I go about changing from the default range, +/- 2g to say +/- 16g? 2. How do I change the output data rate from…
  • ADXL345 vary in performance

    Q Our application is to detect when cars start moving (in order to wake up the system (i.e. GPS and GSM modules). When setting up the ADXL345 as shown below, it works as expected for 98% of the devices…
  • ADXL345: Datasheet Error

    Q In the data sheet of the ADXL345/ADXL346 on page 15/14 Figure 36 „Preventing Bus Traffic Errors“ we assume that the NOR gate is wrong and it should be an OR gate. A I confirm that in Figure 36…
  • ADXL345: How to calibrate

    Q Could you tell me if it is possible to calibrate the ADXL345? A Calibration is done similar to any other accelerometer. Depending on how calibrated you would like it to be. Basically, you would…

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