Product Specification: BMA400

Basic Description

• Product Name: BMA400 3-axes ultra-low power accelerometer
• Manufacturer: Bosch Sensortec
• Package Type: LGA package (12 pins)
• Dimensions: Footprint 2mm x 2mm, height 0.95 mm

Key Features

• Ultra-low Power Consumption: Data acquisition with ultra-low current consumption without compromising performance (< 14.5 µA with highest performance)
• Programmable Functionality:Acceleration ranges: ±2g/±4g/±8g/±16gLow-pass filter bandwidths: 0.48*ODR up to a max. output data read out of 800Hz
• On-chip FIFO: Integrated FIFO with 1 KB capacity
• On-chip Interrupt Features:Auto-low power/Auto wakeupActivity/In-activityStep Counter (overall device current consumption 4µA)Activity Recognition (Walking, Running, Standing still)Orientation detectionTap/double tap
• Digital Interface: SPI (4-wire, 3-wire), I²C, 2 interrupt pinsVDDIO voltage range: 1.2V to 3.6V
• Compliance: RoHS compliant, halogen-free

Typical Applications

• Step Counting with ultra-low current consumption for extensive battery lifetime
• Advanced system power management for mobile applications and (smart) watches
• Fitness applications / Activity Tracking
• Tap / double tap sensing
• Drop detection for warranty logging
• Window/door measurements for climate control and alarm systems
• IoT applications powered by coin cell driven batteries, requiring <1uA and auto-wakeup functionality

Absolute Maximum Ratings

• Supply Voltage (VDD): 1.72V to 3.6V
• I/O Domain Voltage (VDDIO): 1.2V to 3.6V
• Operating Temperature (TA): -40°C to +85°C

Performance Specifications

• Acceleration Range: ±2g, ±4g, ±8g, ±16g
• Output Data Rate (ODR): 12.5Hz to 800Hz
• Sensitivity:±2g: 1024 LSB/g±4g: 512 LSB/g±8g: 256 LSB/g±16g: 128 LSB/g
• Zero-g Offset: ±50 mg over lifetime
• Temperature Drift: ±0.025 %/K over lifetime

Power Modes

• Sleep Mode: Current consumption 160 nA
• Low-power Mode: Current consumption 850 nA at 25Hz ODR
• Normal Mode: Current consumption 14.5 µA at highest performance

Interrupt Features

• Data Ready Interrupt: Notifies when new data is available
• FIFO Interrupts: FIFO full and FIFO watermark interrupts
• Generic Interrupts: Activity/inactivity detection, orientation change, step counting
• Tap Sensing Interrupt: Single and double tap detection

Package and Mechanical Characteristics

• Package Outline: LGA package with dimensions 2mm x 2mm x 0.95mm
• Sensing Axis Orientation: Defined in the datasheet
• Landing Pattern: Recommended landing pattern provided

Environmental and Safety

• RoHS Compliance: Yes
• Halogen-Free: Yes
• Moisture Sensitivity Level: JEDEC Level 1

Handling and Storage

• Storage Temperature: -50°C to +150°C
• Humidity: ≤ 65% rel. H.
• ESD Protection: 2kV HBM