Bosch Sensortec BMA456

The BMA456 is a digital, triaxial acceleration sensor produced by Bosch Sensortec. It is designed for low-power and demanding consumer electronics applications, particularly in wearable devices. This sensor is known for its ultra-small package size, high performance, and precise temperature measurement capabilities. The BMA456 features intelligent on-chip motion-triggered interrupt functions and is optimized for fitness applications, activity tracking, and other wearable/hearable use cases.

• Small Package Size: The BMA456 comes in a compact LGA package with a footprint of 2mm x 2mm and a height of 0.65 mm, making it ideal for space-constrained applications.
• Digital Interfaces: Supports SPI (4-wire, 3-wire) and I²C interfaces, along with two digital interrupt pins.
• Plug ’n’ Play Step-Counter Solution: Includes a built-in step-counter solution with watermark functionality, enhancing fitness and activity tracking capabilities.
• Power Management: Features advanced power management for wearable and hearable applications, including display on/off and profile switching.
• Intelligent On-Chip Motion-Triggered Interrupts: Optimized for detecting various motion events, such as wrist tilt and tab/double tab.
• High Performance Angle Measurements: Provides precise angle measurements and E-compass tilt compensation.
• Temperature Measurement: Includes a temperature sensor with a measurement range of -40°C to 80°C.

• Wearable Devices: Ideal for smartwatches, fitness trackers, and other wearable electronics due to its low power consumption and compact size.
• Hearable Devices: Suitable for smart earbuds and headphones, enabling features like step counting and motion detection.
• Consumer Electronics: Used in various consumer electronics requiring precise motion and temperature sensing, such as smartphones and tablets.
• Activity Tracking: Enhances fitness tracking applications with its accurate step-counting and motion detection capabilities.
• Industrial Automation: Can be used in industrial settings where precise motion sensing is required, such as in robotics and automation systems.

1. What is the package size of the BMA456?

   The BMA456 comes in an LGA package with a footprint of 2mm x 2mm and a height of 0.65 mm.

2. What are the supported digital interfaces of the BMA456?

   The BMA456 supports SPI (4-wire, 3-wire) and I²C interfaces, along with two digital interrupt pins.

3. What are the measurement ranges of the BMA456?

   The BMA456 has programmable measurement ranges of ±2 g, ±4 g, ±8 g, and ±16 g.

4. What is the operating temperature range of the BMA456?

   The operating temperature range of the BMA456 is -40°C to +85°C).

5. How much current does the BMA456 consume in full operation and low-power mode?

   The BMA456 consumes 150 µA in full operation and 14 µA in low-power mode (typ. at 50 Hz ODR)).

6. What is the shock resistance of the BMA456?

   The BMA456 has a shock resistance of 10,000 g x 200 µs).

7. Does the BMA456 support temperature measurement?

   Yes, the BMA456 includes a temperature sensor with a measurement range of -40°C to 80°C).

8. What are some typical applications of the BMA456?

   The BMA456 is typically used in wearable devices, hearable devices, and other consumer electronics requiring precise motion and temperature sensing).

9. Does the BMA456 have built-in step-counting functionality?

   Yes, the BMA456 includes a built-in step-counter solution with watermark functionality).

10. How does the BMA456 manage power?

    The BMA456 features advanced power management, including separate power supply pins for the main power (VDD) and interface power (VDDIO), allowing for flexible power management in wearable and hearable applications).