MK66FN2M0VLQ18 ADC DIFF. Inputs

[johncooper]

Hello,

I have a question about the MK66FN2M0VLQ18s ADC. I am using an applications that requires at least 2 but possibly 3 differential ADC Inputs. The MK66FN2M0VLQ18 reference manual eludes to there being up to 4 differential ADC inputs but the MK66FN2M0VLQ18 datasheet  has only 3 pins labels with DM marker and one is an overlap between the two diffent input channels, meaning I can at best only use one differential ADC input. Is this right or is there something I am missing like some of the single ended inputs can be used as well.

Thanks,

John

[miduo]

Hello, John

Yes, the datasheet is correct. That means actually only one differential ADC input pair is available for K66, however you could use an external analog multiplexer to extend this capability. You may know from the datasheet that the inputs are ADC0_DP3 and ADC0_DM3 for ADC0 channel 3 and ADC1_DP0 and ADC1_DM0 for ADC1. They are shared same pins, so only one differential ADC input pair is available to use.