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 & reel packaging.

 Key Parameters

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

- Accelerometer Full Scale: ±2g / ±4g / ±8g / ±16g, software selectable, 16-bit output

- Magnetometer Full Scale: ±50 Gauss

- Supply Voltage: 1.71V ~ 3.6V (typical 3.3V)

- Current 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℃** (for consumer & industrial applications, non-AEC-Q100)

- Package: LGA-12, compact thin package

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

- Independent power control: Accelerometer and magnetometer modules can be enabled/disabled separately

## Functions

1. 3-axis acceleration acquisition: Measure gravity, tilt angle, motion attitude and free-fall detection

2. 3-axis geomagnetic acquisition: Detect earth magnetic field to implement e-compass (heading angle)

3. Attitude calculation: Sensor fusion of accelerometer and magnetometer for tilt-compensated compass and azimuth positioning

4. Programmable interrupts: Motion wake-up, free-fall and magnetic field detection trigger interrupt signals

5. Low-power sleep/wake-up mode, ideal for battery-powered devices; FIFO reduces MCU reading workload

6. Built-in self-test for convenient production line testing

 Applications

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

- IoT: Portable positioning, asset tracking, e-compass

- Handheld devices: Handheld navigation, gimbals, remote controllers

- Industrial: Miniature attitude detection, tilt sensing, equipment motion monitoring
- Drones & robots (basic heading reference)