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amir5
amir5
Visitor II
May 9, 2016
Question

q.lsm6ds3 anti-aliasing filter order

  • May 9, 2016
  • 2 replies
  • 911 views
Posted on May 09, 2016 at 13:05

hi,

I've got a few questions.

1. what is the order anti-aliasing filter of the Acc?

2. what is the order anti-aliasing filter of the Gyro?

3. how does the DLPF1 filter help me if the cut-off freq is higher then nyquist freq?

thank you,

amir

#lsm6ds3 #lsm6ds3
This topic has been closed for replies.

2 replies

giannisroussos0
giannisroussos0
Associate
June 24, 2016
Posted on June 24, 2016 at 11:19

Hi all,

I have similar questions regarding the LSM9DS1:

1. The Acceleration ODR choices go down to 10 Hz, however the bandwidth selection, presumable an anti-aliasing filter, is limited to 50Hz. Thus, when sampling at 10Hz or 50Hz with a bandwidth selection of 50Hz severe aliasing is to be expected. Is there a way to avoid this?

2. The accelerometed digital filter operation is not documented properly. What dow ''high resolution'' refer to? How is LPF or HPF selected?

Petr S
Petr S
ST Employee
June 30, 2016
Posted on June 30, 2016 at 14:07

Hi Amir,

please refer to the Chapters 2.6 and 2.7 of the AN4650 Application Note downloadable from ST web pages:

http://www.st.com/resource/en/application_note/dm00157511.pdf

Thank you and best regards,

Petr

Daniel Mulally
Daniel Mulally
Visitor II
February 8, 2017
Posted on February 08, 2017 at 00:48

I don't see those chapters in AN4650, or anything that answers the questions: what is the order of the antialias filters. I have another question: what is the cutoff frequency and order of the gyro antialias filter?

Dan

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