Hello to all forum members, I have a question for ADT7420 sensor. I will use ADT7420 sensor on my Nexys 4 board and i found an i2c vhdl component. But my question is when I look at to datasheet I saw "The ADC resolution, by default, is set to 13 bits (0.0625°C). " this line. When I research about this the temperature that measured with this ic users multiply 13 bit data with 0.0625. My question is what is ADC resolution and why we need this ? Thanks in advance for your replies. Good days to all. Page 1 - The paragraph "The ADT7420 is a high accuracy digital temperature sensor offering breakthrough performance over a wide industrial range, housed in a 4 mm × 4 mm LFCSP package. It contains an internal band gap reference, a temperature sensor, and a 16-bit ADC to monitor and digitize the temperature to 0.0078°C resolution. The ADC resolution, by default, is set to 13 bits (0.0625°C). The ADC resolution is a user programmable mode that can be changed through the serial interface." datasheet: https://fevaris.com/storage/datasheets/3730/3730.pdf
13 bits ADC resolution means that whenever the digital output of the ADC changes by 1, this means the temperature changes by 0.0625°C. For 16 bits resolution each ADC step corresponds to 0.0078°C, so the measurement is more accurate. So if you need higher precision in temprature measurement, configure the sensor to 16 bit.
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