Hello All,
I am working with a single axis industrial accelerometer. The output from it is analog signal. it needs a constant current of 2 to 4 mA and voltage of 18 to 30V. The output from it is an analog signal.
My question is while programming micro controller pins. do I have to assign a pin as an analog to digital converter or digital of analog converter. when i have checked the output from the sensor VDC in multimeter it is fluctuating between 2 to 3V, similar situaion is observed when I have changed the DMM( multimeter) settings to VAC. the output voltage from sensor is in mV. In order to avoid DC voltage going into an assigned pin in microcontroller. I have kept a capacitor in series with configured pin of microcontroller.

My question is do I have to configure that pin as ADC or DAC?

 

hi ashokraj,
Which MCU type and what programming language.?
Also what are the analog voltage ranges.?
E

 

Depends on micro. Normal people read datasheet

 

If you want to convert an analog voltage to discrete numbers you use an ADC.
Make sure that the input voltage range does not exceed the range acceptable to the ADC.

You do not want to put a capacitor in series with the ADC input pin. If you do that you will not be able to measure DC voltages from your sensor.

 

hi ashokraj,
Which MCU type and what programming language.?
Also what are the analog voltage ranges.?
E

STM32f051, Arm cortex M0
c language.
analog voltage ranges are in between 40 to 300 mV

 

I have kept a capacitor in series with configured pin of microcontroller.

In that case it sounds as though the pin is floating. Shouldn't it be ground-referenced for the ADC to work properly?

 

https://www.st.com/resource/en/application_note/cd00211314.pdf