Overview
The BMA253 is a triaxial, low-g acceleration sensor with digital output, designed for consumer applications by Bosch Sensortec. It is particularly suited for mobile devices due to its ultra-small package and low power consumption. The sensor measures acceleration in three perpendicular axes and features an on-chip interrupt controller, enabling motion-based applications without the need for a microcontroller. It is optimized for functionality, performance, and power consumption in various customer-specific applications.
Key Specifications
| Parameter | Technical Data |
|---|---|
| Digital Resolution | 12 bit |
| Measurement Ranges | ±2g, ±4g, ±8g, ±16g |
| Sensitivity (calibrated) | ±2g: 1024 LSB/g, ±4g: 512 LSB/g, ±8g: 256 LSB/g, ±16g: 128 LSB/g |
| Zero-g Offset (typ., over life-time) | ±80 mg |
| Noise Density (typ.) | 220 µg/√Hz |
| Bandwidths (programmable) | 1000 Hz ... 8 Hz |
| Digital Inputs/Outputs | SPI & I²C, 2x digital interrupt pins |
| Supply Voltage (VDD) | 1.62 … 3.6 V |
| I/O Supply Voltage (VDDIO) | 1.2 … 3.6 V |
| Temperature Range | -40 … +85°C |
| Current Consumption | 130 µA (@ 2 kHz data rate), 6.5 µA (@ 40 Hz data rate) |
| FIFO Data Buffer | 32 sample depth (for each axis) |
| Package | LGA-12 (2x2x0.95 mm³) |
| Shock Resistance | 10,000 g x 200 µs |
Key Features
- Ultra-small LGA package (12 pins), footprint 2mm x 2mm, height 0.95mm
- Digital interface: SPI (4-wire, 3-wire), I²C, 2 interrupt pins
- Programmable functionality, performance, and power consumption
- On-chip FIFO with a depth of 32 frames
- On-chip interrupt controller for motion-triggered interrupt signals (new data, any-motion detection, tap sensing, orientation recognition, flat detection, low-g/high-g detection, no-motion/inactivity detection)
- Ultra-low power consumption with advanced system power management features
- Integrated temperature sensor
- RoHS compliant and halogen-free
Applications
- Display profile switching
- Menu scrolling, tap/double tap sensing
- Gaming
- Pedometer/step counting
- Free-fall detection
- E-compass tilt compensation
- Drop detection for warranty logging
- Virtual reality features and game controllers
- Man-machine interfaces and computer peripherals
Q & A
- What is the BMA253 sensor?
The BMA253 is a triaxial, low-g acceleration sensor with digital output designed for consumer applications, particularly suited for mobile devices.
- What are the measurement ranges of the BMA253?
The BMA253 has programmable measurement ranges of ±2g, ±4g, ±8g, and ±16g.
- What interfaces does the BMA253 support?
The BMA253 supports SPI (4-wire, 3-wire) and I²C interfaces, along with 2 digital interrupt pins.
- What is the power consumption of the BMA253?
The BMA253 has a current consumption of 130 µA at a 2 kHz data rate and 6.5 µA at a 40 Hz data rate.
- Does the BMA253 have an integrated temperature sensor?
- What are the typical applications of the BMA253?
The BMA253 is used in applications such as display profile switching, menu scrolling, gaming, pedometer/step counting, free-fall detection, and more.
- Is the BMA253 RoHS compliant?
- What is the package size of the BMA253?
The BMA253 comes in an ultra-small LGA package with a footprint of 2mm x 2mm and a height of 0.95mm.
- Does the BMA253 have an on-chip FIFO?
- What kind of interrupts does the BMA253 support?
The BMA253 supports motion-triggered interrupt signals for new data, any-motion detection, tap sensing, orientation recognition, flat detection, low-g/high-g detection, and no-motion/inactivity detection.
