Are there any hardware precautions for realizing accurate A/D conversion?
In order to perform A/D conversion, it is necessary to fully charge the internal capacitor, but if the impedance of the A/D conversion target is high, the discharge and charge will take time and the conversion value will not be accurate. For correct A/D conversion, please set the impedance of the signal source connected to the analog input pin so that it is low enough. (Refer to the hardware manual for the calculation method.) Moreover, in order to suppress the influence of the input current at the time of A/D conversion, please add a capacitor to the analog input pin.
|R8C/34E, R8C/34F, R8C/34G, R8C/34H|
|R8C/36E, R8C/36F, R8C/36G, R8C/36H|
|R8C/38E, R8C/38F, R8C/38G, R8C/38H|