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I need an Arduino board for simple ADC, but 10 bits of resolution is sadly not enough. I am going to buy a board with 12 bits of resolution, but really couldnt decide on the exact model. It needs to be easily accessable and wont be used for anything else other then ADC. I have my eye on MO, but cant decide if i should buy the pro or the normal one, or just another Arduino board.

I take the data through USB port and the instrument will also be powered with the same USB cable.

* My only option is to use an Arduino*

I know i can use the Aref pin or do oversampling but i really am not intrested in those options. thanks for your input

Firat.Berk.Cakar
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2 Answers2

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Use a Teensy 3.x. Those have 13 bit ADCs

Gerben
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The statement my only option is to use an Arduino is not unambiguous whatsoever.

If you meant "Compatible with Arduino IDE" than the Teensy 3.2, officially priced on the Arduino store at 17.90 EUR + VAT is the cheapest official Arduino board providing a 12 bit ADC.

If you meant "Branded as an Arduino" then the Arduino/Genuino M0 Zero, officially priced at 22.00 42.90 EUR + VAT is the cheapest board providing a 12 bit ADC.

This is the result of a quick search on the Arduino web site, which you could have checked yourself.

In my opinion the cheapest "Arduino based" solution would be an Arduino Pro Mini (officially discontinued) or a barebone ATmega328P along with an external 12 bit ADC. This opens up for many options, just use a parametric search on DigiKey, Octopart or any other website of your choice.

A quick search ended up with MAX1245ACAP priced at 1.30 USD + VAT, probably ending in a BOM cost for the entire solution below 10 USD + VAT, excluding the PCB.

UPDATE: as stated in the comments, the M0 is a cheaper version of the Zero.

honi
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Roberto Lo Giacco
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