Analog Input Specifications

Last Update: Jan 4, 2019 @ 18:15
Decaf boards with analog inputs can accept 0-5v inputs. Inputs are buffered with an op-amp to protect the mpu. Diodes to Vcc and GND protect against voltage spikes. Input impedance is 1 M ohm.


Decaf analog input circuit.

Decaf Boot State

Analog Inputs not connected to a sensor float at 0v via the 1M resistor to GND. You may find it beneficial (and we strongly recommend) for your external circuit design to ground unused inputs.


Related I/O Pages

Digital Inputs    Digital Outputs