K66 ADC Differential Mode

[christhomas]

Hi,

In the data sheet for the K66P144M180, it states that 

The 16-bit accuracy specifications listed in Table 1 and Table 32 are achievable on the differential pins ADCx_DP0, ADCx_DM0.

Does this mean that the ADCx_DP3/DM3 do not satisfy 16-bit accuracy. 

Thanks! 

[Hui_Ma]

Hi

In fact, the K66 ADCx_DP3/DM3 with the same accuracy performance with ADCx_DP0/DM0 in differential mode.

There with one document error, the correct description is:

The 16-bit accuracy specifications listed in Table 31 and Table 32 are achievable on the differential pins ADCx_DP0, ADCx_DM0.

The ADC table31 and table32 specification was measured from the ADCx_DP0 and ADCx_DM0 in differential mode.

Thank you for the attention.

Have a great day,
Ma Hui
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[christhomas]

Thank you for your answer. A follow up question, looking at the data sheet I can see that

Pin 28 corresponds to ADC0_DM0, but I cant find any pin that is assigned the counterpart ADC0_DP0???

[Hui_Ma]

Hi

You are right.

The K66 product 144 pin package doesn't provide ADC0_DP0 pin.

So, if customer want to use ADC in differential mode, please consider to use below pins:

ADC0_DP3 & ADC0_DM3

or

ADC1_DP0 & ADC1_DM0

Wish it helps.

Have a great day,
Ma Hui
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[christhomas]

Hi Hui, 

Thank you so much again. 

I am guessing then it is only possible to use one differential pin since ADC1_DP0 and ADC0_DP3 are shared on the same pin. 

So I can not use two differential analog inputs? 

Chris

[Hui_Ma]

Hi

You are right.

There with only one pair of differential analog input pins.

So, you can not use two differential analog inputs at the same time.

Wish it helps.

Have a great day,
Ma Hui
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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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