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Low-power modes and auto-wake/sleep using the MMA8450Q

Posted: 09 Mar 2010 ?? ?Print Version ?Bookmark and Share

Keywords:accelerometers in handhelds? handheld electronics MMA8450Q? current consumption?

Accelerometers are commonly used in handheld electronics and/or battery operated electronic devices. Consumption of current in the entire system is a critical feature of the product design. Users do not want to be inconvenienced by continually recharging or changing out batteries. When designing in the accelerometer, battery power usage is often a critical feature which concerns many customer-users. Therefore, current consumption of the sensor as well as of the entire system should be paramount design considerations. If the system processor is used often only for processing data from the accelerometer, then it is ideal to embed the intelligence in the sensor to avoid burdening the system processor from running continually. The flexibility of embedded interrupt driven functions and selectable data rates with trade-offs for resolution, response time and current are the types of intelligent features in the MMA8450Q.

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