A three-axis accelerometer family designed to deliver enhanced battery life for smart mobile devices from Freescale Semiconductor features enhanced resolution, and low noise. Utilising the MMA845xQ family, system designers can integrate standard functions like orientation detection and real-time applications. The accelerometers extend the battery life of smart mobile devices, says the company. They offer sensor intelligence through embedded algorithms and computation in three enhanced accelerometers. Together with the host processor, the embedded accelerometers help make decisions on contextual environmental sensing and enable the ability to record movement. Battery applications benefit from the accelerometer's low current consumption at 1.8 µA in standby mode and 6µA in active mode. It contains four power modes. The accelerometers include a range of real-time features. The devices support applications such as low-end for basic gestures, mid-range for more complex gestures, and applications such as dead reckoning or precision tilt detection. These devices are pin-for-pin compatible with register map alignment between the accelerometers. They offer a bandwidth with user configurable sample rates ranging from 1.5 to 800 Hz and operate with an I/O interface voltage range of 1.62 to 3.6V. The accelerometer incorporates an on-chip first-in/first-out memory buffer that stores up to 32 sample sets of X, Y, and Z data.
