L3G4200D Caracteristics, features, circuit schematics and datasheet

detailed-image-of-L3G4200D-1-L3G4200D

detailed-image-of-L3G4200D-1-L3G4200D

I decided to dedicate a POST to the L3G4200D gyro.

This popular and low cost sensor is present on a number of multirotors IMU out there.
In my case i’ve found this sensor on both models of wich is defined as GY-80 also known as “10DOF 9-axis“, a value for price imu, easy enough except for the pullup resistor needed by this imu in order to work properly.

The L3G4200D is a 5/3 Volts, three-axis angular rate sensor able to provide unprecedented stablility of zero rate level and sensitivity over temperature and time. It includes:

  • sensing element
  • an IC interface capable of providing the measured angular rate to the external world through a digital interface (I2C/SPI).

The sensing element is manufactured using a dedicated micro-machining process developed by STMicroelectronics to produce inertial sensors and actuators on silicon wafers.

The IC interface is manufactured using a CMOS process that allows a high level of integration to design a dedicated circuit which is trimmed to better match the sensing element characteristics.

The L3G4200D has a full scale of ±250/±500/ ±2000 dps and is capable of measuring rates with a user-selectable bandwidth.

The L3G4200D can operate within a temperature range of -40 °C to +85 °C.

L3G4200D Files:

Download L3G4200D-Datasheet-specifics

L3G4200D Circuit Diagram:

View L3G4200D-circuit-diagram

View L3G4200D-circuit-diagram

L3G4200D Sensitivity vs. temperature characterization at 250 dps FS

GRAPH-L3G4200D-Sensitivity-change-vs-temperature

GRAPH-L3G4200D-Sensitivity-change-vs-temperature

Resistance to external stress

Good news! The patented Mushroom design in ST’s MEMS gyroscopes allows excellent resistance to external mechanical forces as shown in next picture. In order to measure ST’s performance against that of a competitor, dedicated comparison tests have been performed under identical setup and conditions.
L3G4200D-Resistance-to-external-stress

L3G4200D-Resistance-to-external-stress

This last image suggest also that this sensor is much more vibration resistant that the one used in the Kk-Hk Board or this version as they use both Murata Piezo Gyros with no accelerometers. And I can assure you that if you have an unstable platform, vibrating motors, unbalanced props, like mine, you will notice a huge difference flying with this sensor.

Every comment is welcome!
Ciao!

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