Kinetis Microcontrollers中的主题 Re: K66 Pinout ADC0_DP0 not found

K66 Pinout ADC0_DP0 not found

jayas — Fri, 16 Feb 2018 12:00:04 GMT

I want to use differential ADC in K66 uC, but I only found one of the two ADCs ports because the negative pair to use with pin 28 is not in the datasheet.

I have ADC0_DM0 or ADC1_DM3 on pin 28 (L2) but I cann`t find ADC0_DP0 or ADC1_DP3

Re: K66 Pinout ADC0_DP0 not found

gerardo_rodriguez — Sat, 24 Feb 2018 01:28:06 GMT

Hello Juan,

For the K66, the ADC0_DP0 is not available for differential inputs. Only the pins 29 and 30 can be used as differential inputs and are shared between ADC0 and ADC1.

The inputs are ADC0_DP3 and ADC0_DM3 for ADC0 channel 3 and ADC1_DP0 and ADC1_DM0 for ADC1.

Best Regards,

Gerardo

Re: K66 Pinout ADC0_DP0 not found

jayas — Mon, 26 Feb 2018 16:10:14 GMT

Thank you Gerardo. It means than we can only use 1 differential ADC input un this model, isn't?

Only if we found an exernal multiplexing device to switch between channels we can use ADC0 and AD1 sharing same pins.

Re: K66 Pinout ADC0_DP0 not found

gerardo_rodriguez — Wed, 28 Feb 2018 22:18:09 GMT

Hello Juan,

It is correct. Only one differential ADC input is available for the K66, but you could use an external analog multiplexer to extend this capability.