BMA140 [BOSCH]

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. The sensor is set up as a two-chip arrangement consisting of a three-channel capacity differential MEMS acceleration-sensing element and an application specific integrated circuit (ASIC). The BMA140 provides 3 parallel analog output signals in a ±4g acceleration range. The output signals are ratiometric. In the ±4g acceleration range the sensor is offering a sensitivity of 300mV/g at 3.0 V supply voltage and 220µg/√Hz as a typical noise level. The typical current consumption is 200µA in operation. The sensor can be switched into a standby mode with an ultra low current consumption of typically 0.7 µA. The return from standby mode to full performance conditions is performed in less than 1ms wake up time.