L3GD20 three-axis digital output gyroscope motion sensor module I2C/SPI

Brand: Bravekit
Product Code: L3GD20_MOD
Availability: In Stock
Price:
$15.50

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This sensor is a carrier/breakout board for the ST L3GD20 three-axis gyroscope, which measures the angular rates of rotation about the pitch (x), roll (y), and yaw (z) axes. Angular velocity measurements with a configurable range of ±250°/s, ±500°/s, or ±2000°/s can be read through a digital I2C or SPI interface. The board has a 3.3 V linear regulator and integrated level-shifters that allow it to work over an input voltage range of 2.5–5.5 V, and the 0.1" pin spacing makes it easy to use with standard solderless breadboards and 0.1" perfboards.

 

Overview


This board is a compact (0.5" x 0.9") breakout board for ST’s L3GD20 three-axis digital-output gyroscope. The L3GD20 is a ICin LGA package, what makes it difficult for the typical student or hobbyist to use. It also operates at voltages below 3.6 V, which can make interfacing difficult for microcontrollers operating at 5 V. This carrier board addresses these issues by incorporating additional electronics, including a 3.3 V voltage regulator and level-shifting circuits, while keeping the overall size as compact as possible. The board ships fully populated with its SMD components, including the L3GD20, as shown in the product picture.

L3GD20 uses a higher resonant frequency that makes it more resistant to audio noise and vibrations.

The L3GD20 has many configurable options, including three selectable angular rate sensitivities, a choice of output data rates, an embedded FIFO for buffering output data, and a programmable external interrupt signal. The three angular velocity readings are available through a digital interface, which can be configured to operate in either I2C or SPI mode.

The carrier board includes a low-dropout linear voltage regulator that provides the 3.3 V required by the L3GD20, which allows the sensor to be powered from a 2.5-5.5 V supply. The breakout board also includes a circuit that shifts the I2C/SPI clock and data in lines to the same logic voltage level as the supplied VIN, making it simple to interface the board with 5 V systems, and the board’s 0.1" pin spacing makes it easy to use with standard solderless breadboards and 0.1" perfboards.

Features

  • Dimensions: 0.5" x 0.9" x 0.1" (13 x 23 x 3 mm)
  • Weight without header pins: 0.7 g (0.03 oz)
  • Operating voltage: 2.5 to 5.5 V
  • Supply current: 7 mA
  • Output format (I?C/SPI): one 16-bit reading per axis
  • Sensitivity range (configurable): ±250°/s, ±500°/s, or ±2000°/s

 

Pinout:

PIN

Description

VDD-IO

Power supply for digital interface

VIN

Main power supply input. Can be in range 2.5-5.5V

SCL/SPC

Level-shifted I²C/SPI clock line: HIGH is VIN, LOW is 0 V

SDA/SDI

Level-shifted I²C data line and SPI data in line (also doubles as SDO in 3-wire mode): HIGH is VIN, LOW is 0 V

SDO

SPI data out line in 4-wire mode: HIGH is VDD, LOW is 0 V. This output is not level-shifted. Also used as an input to determine I²C slave address (see below).

DRDY/INT2

Data ready indicator, a 3.3-V-logic-level output. HIGH (3.3 V) indicates angular rate data can be read. Can also be configured as a FIFO interrupt. This output is not level-shifted.

INT1

Programmable interrupt, a 3.3-V-logic-level output. This output is not level-shifted.

CS

SPI enable (chip select). Pulled up to VDD to enable I²C communication by default; drive low to begin SPI communication.

GND

The ground (0 V) connection for your power supply. Your I²C or SPI control source must also share a common ground with this board.

 

Documentation

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