My customer have some questions about ADXL362. Please tell me.
Register settings are following.
addres 0x1F code 0x52.
addres 0x2D code 0x00.
addres 0x20 code 0x7D.
addres 0x21 code 0x00.
addres 0x22 code 0x01.
addres 0x23 code 0x7D.
addres 0x24 code 0x00.
addres 0x25 code 0x01.
addres 0x26 code 0x00.
addres 0x27 code 0x3F.
addres 0x28 code 0x03.
addres 0x29 code 0x9C.
addres 0x2A code 0x01.
addres 0x2B code 0x10.
addres 0x2C code 0x91.
addres 0x2D code 0x02.
When vibration occurs before becoming FIFO DATE FULL in this state.
1st sample : 0x800 or similar to maximum value.
When after having become FIFO DATE FULL in this state, vibration occurs.
1st sample : normal date.
Is this a device specification? Please tell me the cause and workaround.
It seems to be the same content as EZ below.
Thanks for the question. Do you mean you've observed jitter in the output data? I would first suggest checking your power supply, communication timing spec and signal integrity on a scope.
Thank you the replay. I'm got it. I confirm.
I'm sorry, I'll add the information.
Would you tell me what else could be envisioned with this information?
myself confirmed it with Arduino and ADXL362.
This time it ’s not a jitter issue.
I have a few follow-up questions here. Does this issue happen intermittently? It seems two configurations are identical. In addition, how is the part oriented? It seems the initial offset for X and Y axes are out of spec, assuming the part is configured to 8g mode the Z is in the +1g gravity field. The activity threshold is set to 125LSB*4mg/LSB = 500mg, is that too low to detect the desired signal in the gravity field? What signal do you want to monitor in this case? Have you tried stream mode or oldest saved mode and see if the output waveform is as expected? Thanks.
Thank you for reply. I will answer your question.
１、Does this issue happen intermittently?
→No. This problem is 1st samples when measurement mode .
Occurs each time when returning to standby and switching to measurement mode.
２、how is the part oriented?
→send to picture.ADXL355 is placed put on the table horizontally.
３、is that too low to detect the desired signal in the gravity field?
→I think there is no prblem. because this case use to Reference mode.
And if there is no vibration. No ACT occurs.
４、Have you tried stream mode or oldest saved mode and see if the output waveform is as expected?
→No. I wanna try.
but customer hope to use Trigger Mode & FIFO.
because they want to detect small vibration.