![]() Other specification include (but not limited to) the sampling rate, that means So you can see that the 8 bit ADC can’t tell It accurately up to 5/256 v= 19mV approx. For example if the reference voltage(explained latter) ofĪDC is 0 to 5v then a 8 bit ADC will break it in 256 divisions so it can measure This specifies howĪccurately the ADC measures the analog input signals. Most important specification of ADCs is the resolution. Is for PIC18F4520 which is a 40 PIN device). In this tutorials we will learn to use the internal ADC of PIC18 devices (Example Really helpful example of analog devices are ![]() This enables us to easily interface all sort of analog devices with MCUs. To a number so that it can be processed by a digital systems like MCU. ADC stands for analog to digital converter. To solve this problem most modern MCUs haveĪn ADC unit. It is below 2.5 then it will be read as 0 (in case of 5v systems). For example if input is more than 2.5v it will be read as 1 and if TheyĬan only differentiate between HIGH or LOW level on input So if we could measure voltage, we can measure temperature.īut most of our computer (or Microcontrollers) are digital in nature. Temperature sensor the output voltage varies according to the temperature, While that second quantity can be anything like temperature, pressure, light,įorce or acceleration. Varies directly with some other quantity. Many electrical signals around us are Analog in nature.
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