Questions about Temperature sensor in ADXL363

Hi Se-woong,

You could certainly use the temperature sensor in the ADXL363 to measure the ambient temperature experienced by the accelerometer. The temperature sensor is not factory-calibrated. In order to use the temperature sensor output for accurate measurements, you would first need to determine the bias of the temperature sensor output. It is spec'ed as 350LSB typ + 290LSB std. dev.

The way to do this would be to measure the temperature sensor output in your application at production test, while using an external temperature sensor to obtain a reference reading. For e.g. let's say you are testing at 25C (=T0), and measure this temperature using an external reference. Let's say the temperature sensor reading for ADXL363 is 350LSBs (=X0). This means that for the part in question, 350LSBs corresponds to 25C, and the temperature sensor output will change with temperature with a scale factor 0.065C/LSB. All you need to do is to measure the bias at a ffixed temperature which you should measure with an external reference at production test. Once you know this bias, you could program it in your processor and estimate temperature (T) accordingly from the temperature sensor reading (=X) using the formula: T = (X-X0)*0.065 + T0

Hi Se-woong,

You could certainly use the temperature sensor in the ADXL363 to measure the ambient temperature experienced by the accelerometer. The temperature sensor is not factory-calibrated. In order to use the temperature sensor output for accurate measurements, you would first need to determine the bias of the temperature sensor output. It is spec'ed as 350LSB typ + 290LSB std. dev.

The way to do this would be to measure the temperature sensor output in your application at production test, while using an external temperature sensor to obtain a reference reading. For e.g. let's say you are testing at 25C (=T0), and measure this temperature using an external reference. Let's say the temperature sensor reading for ADXL363 is 350LSBs (=X0). This means that for the part in question, 350LSBs corresponds to 25C, and the temperature sensor output will change with temperature with a scale factor 0.065C/LSB. All you need to do is to measure the bias at a ffixed temperature which you should measure with an external reference at production test. Once you know this bias, you could program it in your processor and estimate temperature (T) accordingly from the temperature sensor reading (=X) using the formula: T = (X-X0)*0.065 + T0