LPC55xx ADC: 16 bit ADC has (only) ENOB = 12

[danielholala]

Hi there,

the ADC for LPC55xx (e.g., LPC5528) has an ENOB of only 12.

That number seems quite low (e.g., compared to a 20 year old ADuC841 with 12-bit ADC that has an ENOB of 11.6).

I wonder why this is. Is it due to the fact that the LPC55's ADC has a lot of "missing codes"?

Thanks.
Daniel

[_Leo_]

Hi,

Thank you so much for your interest in our products and for using our community.

The ENOB typical values you can see in "Table 40. 16-bit ADC static characteristics" of datasheet.

Hope it helps you.

Have a nice day!

[danielholala]

Dear @_Leo_ ,

for, e.g., LPC5528, datasheet states an ENOB of 12.

I think that is quite a low value for a 16 bit ADC. Why is this? Is it due to the fact that the LPC55's ADC exhibits a "missing codes"  issue?

What is the effective resolution for DC signals (from, e.g., thermistor, strain gauge, potentiometer)?

Thanks.
Dan