FXLS8974CF | Transition time between ODR mode

[shai_b]

Dear Team,

My customer plan to use our 3-Axis Low-g Accelerometer devices such as FXLS8974CF.

Their inquiry was to know the Transition time between ODR mode.

the use case is that the device is operating at low ODR mode (below 100Hz) once there is movement detection our sensor should change its ODR to the highest ODR mode (3200Hz).

Please advise me back what be the Transition time between the two ODR modes?

Waiting for your kind feedback, many thanks.

KR,

Shai

[diazmarin09]

Hello,

I hope all is great with you. Thank you for using the NXP communities.

I have already requested further information. In the meantime, could you please share more information about your application? I mean, is the time requested critical for your design? For what reason? 

I hope this information helps.
Regards,
David

[shai_b]

Hi @diazmarin09 ,

Yes, time is critical in this application since the purpose of this app is to detect a vibrations pattern in uSec, hence fast ODR is required here, but this device is powered by a battery, and not so active the plan is working 99% of the time at low ODR such as 100Hz once there is a movement switching to the highest ODR mode to record and analyze the data.

Knowing the time between the transition ODR mode will assist the algorithm team to assess the feasibly of our sensor.

I am waiting for your kind feedback, Thanks in advance.

Regards, 

Shai 

[JackITB]

Hello Shai,
The transition between Wake<->Sleep modes takes about 490µs.
Let's assume sensor is in sleep mode, practically, this is the time between last sample in sleep mode (sample that triggers the transition to wake mode) and the first sample in wake mode. Next samples are spaced by the nominal 1/ODR period (e.g. 312.5µs at ODR=3200Hz).

Hope this helps, Jacques.

[shai_b]

@JackITB and @diazmarin09 ,

Thank you so much for your kind support.

KR,

Shai

[diazmarin09]

Hello,

I am pleased to contact you again.

I do appreciate your contribution. Please note that we do not have such information characterized.

Anyway, I want to let you know that your query has been forwarded to the corresponding team for further information.

Upon receiving a response I will contact you immediately. Your patience will be greatly appreciated.

Regards,

David