Acceleration sensor: BMA400
The BMA400 is an ultra-low power acceleration sensor for wearables and smart home applications that need a long-lasting battery lifetime. The BMA400 draws ten times less current than existing accelerometers while delivering solid high performance.
- Ultra-low power consumption and high performance
- Intelligent power management for battery-powered devices
- Activity tracking
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Technical data
Measurement range
±2 g, ±4 g, ±8 g, ±16 g
Digital resolution
12 bit
Output data rate (ODR)
12.5 Hz to 800 Hz
Low path filter bandwidth
Selectable 0.48xODR or 0.24xODR
Current consumption (independent from ODR due to continuous measurement)
Max. performance: 14.5 μA
Typical use case: 5.8 μA
Low power use case: 3.5μA
Typical use case: 5.8 μA
Low power use case: 3.5μA
Noise density
Max. performance: 180 μg/√Hz (Z: x 1.45)
Typical use case: 300 μg/√Hz (Z: x 1.45)
Low power: 415 μg/√Hz (Z: x 1.45)
Typical use case: 300 μg/√Hz (Z: x 1.45)
Low power: 415 μg/√Hz (Z: x 1.45)
Ultra low power / auto-wake-up mode
800 nA @ 25 Hz ODR
Embedded features
- Step counter (< 4 μA overall)
- Activity recognition (walking, running, standing still)
- Activity change
- Orientation
- Tab/double tab (< 8 μA overall)
- General interrupt 1 and 2 (programmable via thresholds, timer, logical AND/OR operations)
- 1 kB FIFO
Offset
±80 mg
TCO
±1 mg/K
Interface
SPI & I²C & 2 Interrupt pins
Supply voltage
1.72 V up to 3.6 V
Package
12 pin LGA 2x2x0.95 mm³
