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KL27 ADC external circuit

Question asked by Josip Haluska on Jun 24, 2020
Latest reply on Jun 24, 2020 by Bob Paddock


I will use KL27 ADC to measure up to 7V. Device will run on 1.8-3.3V.

I use measuring of up to 3.3V (during software development) with resistor divider (2 resistors, 1k5 to GND, 4k5 to VDD), and everything related to software is OK.

Question is related to external input stage, because didn't found anything except Figure 35. (High voltage measurement with an ADC input) in device datasheet. What can be omitted from this setup, for safety measuring up to 7V?