The BMA140 in general
The BMA140 is a triaxial low-g acceleration sensor for consumer market applications, available in a standard SMD LGA package with a footprint of 3x3mm2 and a height of only 0.9mm. It allows measurements of static as well as dynamic accelerations. Due to its three perpendicular axes it gives the absolute orientation in a gravity field and enables free fall detection. As all other Bosch inertial sensors, the BMA140 is a two-chip arrangement, which combines an application-specific integrated circuit (ASIC) with a three-channel silicon accelerometer, to form a true micro electro mechanical system (MEMS).

KEY FEATUREs
- Triaxial, ±4g full scale accelerometer
- Standard LGA package with 3mm x 3mm footprint, 0.9mm height
- 2 operation modes: Stand-by- and normal mode
- Ultra-low power consumption:
                             - 200µA in operation mode
                             - 0.9µA in stand-by mode
- Only 1 ms turn-on time form stand-by mode to operation mode
- Analog output signals: 3 parallel (X, Y, Z) plus 1 serial (multiplexed X, Y, Z)
- Internal 1.5kHz 1st-order low-pass analog filter
- Customizable corner frequency
- On-chip gain and offset compensation, calibrated on factory level.
- Trigger-able self-test capability of MEMS sensor element and ASIC
- RoHS compliant and Pb-free
- Based on automotive-proven Bosch MEMS wafer-fabrication technology & processes

Typical applications
Tilt, motion and vibration sensing in
- Gaming
- Virtual reality
- Sports- and life style wear
- Cell-phones
- Handhelds, PDAs, PNDs
- Healthcare
- Patient monitoring
- Navigation
- Electronic compass compensation
- Computer peripherals
- Man-machine interfaces