Analog Input Specifications

Last Update: May 28, 2023 @ 18:46
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

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