# Explorerhat.analog specification

**URL:** <https://forums.pimoroni.com/t/explorerhat-analog-specification/790>\
**Category:** Support\
**Created:** [August 3, 2015, 9:02pm UTC](https://forums.pimoroni.com/t/explorerhat-analog-specification/790 "2015-08-03T21:02:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mikepi](https://avatars.discourse-cdn.com/v4/letter/m/9de053/32.png) [@mikepi](https://forums.pimoroni.com/u/mikepi)\
**Post date:** [August 3, 2015, 9:02pm UTC](https://forums.pimoroni.com/t/explorerhat-analog-specification/790/1 "2015-08-03T21:02:06Z")

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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

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**Author:** ![RogueM](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/roguem/32/311_2.png) [@RogueM](https://forums.pimoroni.com/u/RogueM)\
**Post date:** [August 3, 2015, 11:15pm UTC](https://forums.pimoroni.com/t/explorerhat-analog-specification/790/2 "2015-08-03T23:15:34Z")

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

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**Author:** ![jon](https://avatars.discourse-cdn.com/v4/letter/j/3bc359/32.png) [@jon](https://forums.pimoroni.com/u/jon)\
**Post date:** [August 4, 2015, 2:57pm UTC](https://forums.pimoroni.com/t/explorerhat-analog-specification/790/3 "2015-08-04T14:57:37Z")

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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).