iPhone 6 Duo Carries Dual Accelerometers for Minimized Power Consumption and Improved User Experience

Rafia Shaikh
Posted Sep 28, 2014
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We have already seen quite a few iPhone 6 and iPhone 6 Plus teardowns revealing cost of the smartphones and the inside look. One iPhone 6 teardown also showed us the capability of latest iPhone to survive a little soak in water thanks to the rubber gaskets inside the device. Latest teardown, however, focuses on the accelerometers used in the iPhone 6 duo revealing that Cupertino has gone with dual accelerometers this year for minimized power consumption and improved user experience.iphone 6 teardown

iPhone 6 teardown:

The latest iPhone 6 teardown comes from Chipworks who have revealed that the duo is probably the most sensor-packed devices. The teardown reveals that iPhone 6 and 6 Plus have a three-axis Bosch BMA280 accelerometer and possibly a MPU-6700 six-axis accelerometer.

“The InvenSense device can operate as a six axis inertial sensor, or as either a three-axis gyroscope or a three-axis accelerometer. It is rated to consume 3.4 mA in the six-axis mode, 3.2 mA in the gyroscope mode and 450 µA in the accelerometer normal mode. By contrast, the Bosch device operates as a 3-axis accelerometer only and it consumes 130 µA of current in the accelerometer normal mode. Both devices offer two low power levels of operation for the accelerometer function. The InvenSense device actually consumes less current in its lowest power mode, with a 1 Hz update rate.

The main benefit of the InvenSense is full six-axis integration of the data by the on-chip digital motion processor (DMP). This will provide a direct benefit for gaming and other applications that need sophisticated inertial sensing capabilities. In addition the InvenSense provides significantly higher sensitivity than the Bosch device. The price however, is higher power consumption.” – Chipworks 

The new InvenSense accelerometer has several functions helping it to operate in different modes. These dual accelerometers are claimed to be used for improved user experience. They will also help in minimized power consumption as Chipworks share that the new Bosch sensor can operate at a lower power consumption having a quick cold start up time at 3 milliseconds, as opposed to 30 milliseconds. The duo will work intelligently as the Bosch will be used for tasks not requiring higher sensitivity.

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– Source: Chipworks

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