Q 

Are there any higher frequency EMC tests available for the ADXL345?

A 

EMC testing has been performed for the 10 Hz – 1000 Hz but not at the 127.7 MHz
frequency. These products are used in cellphones (by the millions), so EMC
there is not…

FAQ

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 on page 15/14 of the ADXL345/ADXL346 datasheet…

Q 

A 

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 49µA. We have investigated the

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 type, first order.
3. The mechanical system acts as a…

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 set DATA_FORMAT = 0x02, make the Gee Range = +…

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),

A 

The sensor is produced using standard semiconductor…

Q 

How to add ESD protection diode to the ADXL345

A 

The ESD protection are needed for pin 1 (VDD I/O) and pin 6 (VS) on ADXL345. 
Just any ESD diode would work and serve the purpose of protection.  The current
ADXL345 sample you have on hand, plus the…

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. That is, the device is
moved/touched once…