AnsweredAssumed Answered

Noise equation

Question asked by tomshong on Dec 5, 2012
Latest reply on Dec 14, 2012 by NevadaMark

I was looking at the noise equation listed in this link:

 

http://www.analog.com/en/content/td_Accelerometer_Specifications_Definitions/fca.html

 

where it says Noise = Noise Density * sqrt(BW * 1.6)

 

where BW is the accelerometer bandwidth, set by capacitors on the accelerometer outputs.

 

Suppose I use the spec for the ADIS16130 shown here.

http://www.analog.com/en/mems-sensors/mems-gyroscopes/products/index.html

 

Given a BW of 0.08KHz and density of 0.015 deg/sec/rtHz. Following that equation,  I get a noise of

 

0.015*SQRT(0.08*1000*1.6) = 0.16971 deg/sec,

 

Somehow that noise number looks kinda high and incorrect to me.

 

What is that I missed?

Outcomes