Hi sebmadgwick, Thanks for correcting me, I was thinking about BMI160 and not BMI270. However, there is a fundamental architecture difference between the BMI160/BMI270 and the BMI055/BMI085/BMI088. The BMI085 is using what we call a "closed-loop" gyroscope architecture which is common in automotive IMUs, but unique in the consumer electronics space. There is an additional control loop that actively moves the MEMS structure using electrodes to eliminate the errors induced by temperature. This does have one major downside in the higher current consumption and voltage requirements. BMI160/BMI270 are what we call "open-loop" gyroscopes, where the error is measured and compensated with digital filters, instead of physically moving the MEMS structure back into place. This approach is much lower power, but has some downsides such as short term drift and overall worse non-linearity. From the specifications alone, these effects are difficult to quantify, but the BMI085 is the combination of our BMG160 closed-loop gyroscope, which is our most stable gyroscope in temperature, and our BMA456, which is our most stable accelerometer in temperature. Hope that clarifies my previous comment. o_o
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