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BMA255

Name: BMA255
Rating: 4.7 (12 reviews)

ACCEL 2-16G I2C/SPI 12LGA

製造商
製造商。部分 #BMA255
包 12-VFLGA Module
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規格

Supplier	Bosch Sensortec
Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Obsolete
Type	Digital
Axis	X, Y, Z
AccelerationRange	±2g, 4g, 8g, 16g
Sensitivity(LSB/g)	1024 (±2g) ~ 128 (±16g)
Bandwidth	8Hz ~ 1kHz
OutputType	I²C, SPI
Voltage-Supply	1.62V ~ 3.6V
Features	Adjustable Bandwidth, Selectable Low Pass Filter, Selectable Scale
OperatingTemperature	-40°C ~ 85°C (TA)
MountingType	Surface Mount
Package/Case	12-VFLGA Module

概述

Description

BMA255 is a 3‑axis digital MEMS accelerometer from Bosch Sensortec. It provides motion data for mobile and wearable devices with ultra‑low power consumption. Key features: I2C or SPI digital output, selectable full‑scale ranges (typically ±2/4/8/16 g), high‑resolution data (up to ~14 bits), programmable data rate, and multiple low‑power modes. It also includes built‑in motion features such as activity/inactivity detection, tilt/orientation sensing, wake‑up, and tap/gesture detection, with interrupt outputs and optional FIFO buffering. Applications include activity tracking, step counting, gesture control, screen orientation, fall detection, and general inertial sensing in wearables and IoT devices. In short: a compact, configurable, low‑power accelerometer that delivers reliable 3‑axis motion data and embedded sensing features for motion‑based applications.

Features

BMA255 features (concise):
- 3‑axis MEMS accelerometer with digital output
- I2C and SPI serial interfaces
- 12-bit resolution with programmable full-scale ranges (e.g., ±2g/±4g/±8g)
- Ultra-low power operation with multiple power modes (including a low-power sleep mode)
- High dynamic range with low noise; suitable for mobile/wearable use
- Flexible data rate with data-ready options
- On‑chip FIFO buffer for batching samples
- Interrupt generation for motion events (motion/wake-up/gesture-like indications)
- Integrated self-test and temperature sensor
- Small, rugged package suitable for compact devices
Note: exact ranges, current figures, and feature specifics can vary by revision; consult the latest datasheet for precise numbers.

Package

BMA255 uses a small LGA (Land Grid Array) package, typically 2.0 × 2.0 mm footprint.

Pinout

- Pin count: 14 pins in a small LGA package (≈3x3 mm).
- Function (high level): a 3-axis accelerometer with configurable interfaces and interrupts. Power pins include VDD and GND (plus VDDIO). Communication pins support I2C (SCL, SDA) or SPI (SCK, SI, SO, CS). There are two interrupt outputs (INT1, INT2) and a reset/control pin, plus data-ready/FIFO related pins as configured.

Manufacturer

The BMA255 is manufactured by Bosch Sensortec GmbH, a subsidiary of Robert Bosch GmbH. Bosch Sensortec is a German company that designs and produces MEMS sensors (accelerometers, gyroscopes, environmental sensors) and related semiconductor sensor solutions for consumer, IoT, and industrial applications.

Application

- Wearables and fitness trackers (step counting, activity/sleep monitoring)
- Mobile devices and tablets (motion sensing, gesture control)
- Gaming controllers and AR/VR peripherals
- Health monitoring and eldercare (fall detection, activity tracking)
- IoT and smart devices (tilt/shake/pose sensing)
- Sports sensors and asset tracking in rugged environments

Equivalent

Equivalent (3-axis accelerometers with similar interfaces): ST LIS3DH, ST LIS2DE12; Analog Devices ADXL345, ADXL362; NXP MMA8652F, MMA8451Q. Note: pinout, voltage, and sensitivity vary; verify datasheets before swapping.