# AK09919

AK09919 is a 3-axis magnetometer used as the magnetic-field companion sensor in RVC4 systems. It measures geomagnetic field
strength on X/Y/Z axes and is intended to complement the main 6-axis IMU when heading or magnetic reference is needed.

 * Vendor documentation: [AK09919 datasheet](https://download.mikroe.com/documents/datasheets/AK09919_datasheet.pdf)

## Overview

| Spec | Value |
| --- | --- |
| Axes | 3 |
| Physical sensors | Magnetometer |
| Magnetometer | Yes |
| Sensor-side derived outputs | None |
| Absolute heading on-sensor | No |

## Orientation

Use the drawing below as the vendor-axis reference for AK09919 magnetic-field detection directions.

## Native silicon characteristics

| Signal | Full-scale options | Sensitivity / quantization | Noise density | Native ODR |
| --- | --- | --- | --- | --- |
| Magnetometer | +-4912 uT typ measurement range | 0.15 uT/LSB typ | Vendor datasheet reports sensitivity rather than
accel/gyro-style noise density | 5 / 10 / 20 / 50 / 100 Hz |