Explorerhat.analog specification


#1

Hi,
I have just receive my Explorerhat pro and have it up and running without problem. I am now looking to work on my little project of making a kiln controller using a K type thermocouple feeding ultimately into one of the analog inputs.

I am trying to understand the sensitivity and specifications of the input

  1. Is this documented somewhere as I don’t seem to be able to find it?
  2. How many bits is the register, is it 10 or 12bit or something else?
  3. I assume 0.00v to a null register, what voltage corresponds to all bits set? 3.30v, 5.00v something else?

Thankyou Mike


#2

I believe this is the ADC chip used in the Explorer (pro): http://www.ti.com/product/ads1015


#3

Hi Mike!

The ADC is (as RogueM states) the ADS1015 - it’s a 4-channel 12-bit ADC. If you wish to talk to it directly via I2C then you can see the spec in the datasheet. Our Python libraries will simply give you a number between 0 and 4095 (which represent 0V thru 5V).