LSM303AGRTR (STMicroelectronics) | Ultra-low Power 6-axis MEMS Combo Sensor

# Definition

Ultra-low power 6-axis MEMS combo sensor (3-axis accelerometer + 3-axis magnetometer, e-compass). TR denotes tape-and-reel packaging.

## Key Parameters

Axes: 3-axis acceleration + 3-axis magnetic field (6-in-1)

Acceleration range: ±2g / ±4g / ±8g / ±16g, software-selectable, 16-bit output

Magnetic field range: ±50 Gauss

Supply voltage: 1.71V ~ 3.6V (typical 3.3V)

Power consumption: 250μA in high-resolution combined mode; ≤60μA in low-power mode

Communication interface: I²C (up to 3.4MHz) + 3-wire SPI

Operating temperature: **-40℃ ~ +85℃** (consumer / industrial grade, non-AEC-Q100 / non-automotive)

Package: LGA-12, compact thin package

On-chip features: 32-level FIFO buffer, built-in self-test, integrated temperature sensor

Accelerometer and magnetometer modules can be enabled/disabled separately with independent power control

Features

1. 3-axis acceleration sensing: gravity measurement, tilt detection, motion attitude monitoring, free-fall detection

2. 3-axis geomagnetic sensing: measures earth’s magnetic field for e-compass (heading angle)

3. Attitude computation: fusion of acceleration and magnetometer data for tilt-compensated compass and orientation positioning

4. Programmable interrupts: motion wakeup, free-fall, magnetic event trigger

5. Low-power sleep/wakeup function, ideal for battery-powered devices; FIFO reduces MCU polling load

6. Built-in self-test to facilitate production testing

Applications

- Consumer wearables: smart bands, smartwatches, VR/AR controllers

- IoT: portable positioning, asset tracking, electronic compass

- Handheld devices: handheld navigation, gimbals, remote controllers

- Industrial: compact attitude sensing, tilt measurement, equipment motion monitoring

- Drones and robots (basic heading reference)