4-channel ADC with 8/10/12-bit resolution only supports 8-bit

#1

Hi,

I received the AD7999 4-Channel 8/10/12-Bit AD converter I2C Mini Module .
It is advertised as supporting 8/10/12-bit AD conversion.

Yet, I’m only able to gain 8-bit values from the AD-converter. Reviewing the datasheet it seems that the AD7999 is the 8-bit variant out of a serie of AD-converters, and the 10 and 12 bit AD-converters are different SOTs (AD7995 and AD7991 respectively).

Is my intepretation of the datasheet correct, or am I missing a configuration option?

Cheers,

Martijn

#2

Hi Martijn,
Yes, the AD7999 is a 8bit ADC.

All AD799* has same footprint. It means the board could be build with other ADC on special request.

I think we need to find a better way to word the product title. for now we did add note on the product page.

Thanks

#3

Hi Bhaskar,

Thank you for the reply.

I specifically orderd this item because it provided a 4 channel 12-bit resolution. The answer is therefore a bit dissappointing. Especially, because shipping and taxes tripled its price….

I’m happy to read you modified the description to prevent other people from being misled. I would recommend to provide a 12-bit ADC as standerd option. Even Arduino provides a 10-bit ADC, gaining two extra bits is a plus loosing two seems like a loss.

Cheers,

Martijn

#4

we have around 8 of these in stock. after that we will replace with 12bit.
Also all your future order will receive 15% discount( next one year).

Thanks