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BMA422 is a product introduced by Bosch (Bosch-Sensortec):

I. Product Overview

The BMA422 is an ultra-compact, low-gravity acceleration sensor with a digital interface that is particularly suitable for low-power consumer electronics applications. It is capable of detecting significant motion, tilt, and supports plug-and-play pedometer functionality in smartphones and wearable devices. In addition, the BMA422 is optimized to meet the requirements of Android M low-power accelerometer.

II. Product Features

Three-axis detection: BMA422 is able to detect acceleration changes in X, Y, and Z axes at the same time.

High resolution: the digital resolution is 12-bit, and the resolution is 0.98mg within the range of ±2g.

Programmable Measurement Range: The measurement range is programmable to ±2g, ±4g, ±8g, ±16g to meet the needs of different application scenarios.

High accuracy: Zero gravity offset (typical value, throughout the service life) of ±80mg and noise density (typical value) of 140 μg/Hz ensure the accuracy of measurement results.

Low Power Consumption: BMA422 has excellent power management capability, with a current consumption of 150 μA in full operation mode and only 12 μA in low power mode (at 50 Hz data rate), which prolongs the usage time of the device.

Rich peripheral interfaces: Supports SPI and I2C digital inputs/outputs, as well as 2 digital interrupt pins for easy connection and communication with other peripherals.

Wide power supply voltage range: The power supply voltage (VDD) is 1.623.6V, and the I/O power supply voltage (VDDIO) is 1.23.6V, adapting to different power supply environments.

Wide temperature range: the operating temperature range is -40~+85°C, suitable for various harsh environments.

Strong shock resistance: 10,000g x 200 microseconds to ensure stability in shock environments.

III. Application Areas

With its high performance, low power consumption and easy development, BMA422 is widely used in various low-power applications, such as:

Smart home: used to detect the movement or vibration of furniture to improve home security.

IoT devices: used to monitor the movement status of devices to realize remote monitoring and management.

Portable medical devices: used to monitor the movement of patients, such as step count, heart rate, etc.

Smartphones and wearable devices: for gesture recognition, step counting, impact and free-fall detection and other functions.