iPhone6 ​​design mystery: InvenSense and Bosch accelerometers
After reading the disassembly of the iPhone6, you will be wondering why the iPhone6 ​​board has two accelerometers. Let's analyze it.
The iPhone 6 has a gyroscope, an accelerometer combined six-axis InvenSense sensor (MPU-6700) and a Bosch BMA280 three-axis accelerometer. The reason for combining these two accelerometers is probably that Apple can provide a better user experience while reducing power consumption. Compared with the MPU-6700 and BMA280, you can see the mystery more clearly.
InvenSense MPU-6500 Sensor
The MPU-6500 can be used as a six-axis sensor and can also be switched to the operating state of a three-axis gyroscope or a three-axis accelerometer. It consumes only 3.4 mA in six-axis mode and 3.2 mA and 450 μA in gyroscope and accelerometer modes, respectively. Compared to the Bosch BMA280, which operates in a three-axis accelerometer mode and consumes 130μA of power, both provide a low-power experience in accelerometer functions.
The main advantage of the InvenSense MPU-6500 is the integration of a 3-axis accelerometer, 3-axis gyroscope, and a built-in digital motion processor (DMP). This can satisfy games or applications that require complex inertial sensing technology. In addition, InvenSense products have higher sensitivity than Bosch. Of course the price is also higher.
Bosch BMA280
The BMA280 also features low power consumption and faster startup times. Mainly used in situations where six-axis integration and high sensitivity are not required, such as screen rotation and step counting.
It can be seen that when integrating two accelerometers into the iPhone 6, it provides a better user experience and achieves low power consumption.
Comparison of BMA280 and MPU-6500 parameters:
- Electronic enthusiast network original compilation, reproduced please indicate the source!
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