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常见问答

FAQ

After using the ADC to obtain a temperature sensor value in the NuMicro® series, how does a user convert it into an actual temperature?  Issue Date：2016-12-20

The temperature for a temperature sensor can be calculated by the following formula:

Vtemp (mV) = Gain (mV/℃) x Temperature (℃) + Offset (mV)

where Gain and Offset are constants, which may vary in each NuMicro® series.

 

For example, in the NuMicro® M051 series:

When the operating voltage of the M051 series is 3.3V, use a 12-bit ADC to obtain the temperature sensor value as 0x33D = 829.

 

The following can be obtained:

Vtemp = (829 / 4096) * 3.3 = 0.668 (V) = 668 (mV)

 

The Gain and Offset for the M051 series are -1.75 (mV/℃) and 724 (mV), respectively, as shown in the figure below.

Thus, we can use the temperature sensor calculation formula

668 = (-1.75) * Temperature + 724

and obtain

Temperature = (668 – 724) / (-1.75) = 32 (℃)

Products: 마이크로컨트롤러(MCU) ,Arm Cortex-M0 MCUs ,M051 시리즈 ,M0519 시리즈 ,Nano100/102 시리즈 ,NUC029 시리즈 ,NUC100/200 어드밴스드 시리즈 ,NUC120/122/123/220 USB 시리즈 ,NUC130/230 CAN 시리즈 ,NUC140/240 연결(Connectivity) 시리즈 ,Arm Cortex-M4 MCUs ,M451 시리즈 ,M451M 시리즈 ,M452 USB 시리즈 ,M453 CAN 시리즈 ,M4TK 터치 키 시리즈 ,NUC442/472 시리즈
Applications:
Function: Peripherals,Analog,ADC,Temperature Sensor

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