How to calculate LSB/dps Value? Did not find in Datasheet (LPR450AL gyro)

ersan · ‎2012-08-30

Posted on August 31, 2012 at 01:40

Hi,

in the example code of the LPR430AL there are written these values in the Header. one is from datasheet but where is the other from ? LSB/dps ? Where can i get my LSB value?

/*!<300dps Full Scale Pitch axis Sensitivity [ mV/dps ]see LPR430AL datasheet*/ #define Gyro_Sensitivity_P_300dps 3.33

/*!<300dps Full Scale Pitch axis Sensitivity [ LSB/dps ]*/

#define Gyro_SensitivityLSB_P_300dps 4.13

I need the LSB Value to calculate the Densivity for the LPR45AL.

Please Help

WR

Ersan

#lpr450al-gyro-lsb-value-stm32

harinath · ‎2012-08-30

Posted on August 31, 2012 at 04:33

Hi Ersan,

Gyro_Sensitivity_P_300dps = 3.33

STM32F103 microcontroller's 12-bit ADC is used to digitize Gyro signal.

Gyro_SensitivityLSB_P_300dps = (212 -1) / (300*3.3)

Gyro_SensitivityLSB_P_300dps = 4.13

4.13 is the sensitivity of 4x amplified output.

Now, sensitivity when not amplified is :

Gyro_SensitivityLSB_R_1200dps = 4.13/4 = 1.0325Hari