The maximum frequency of the ADC in PCF8591TD is 100 kHz. However, it's recommended to operate at a frequency below 50 kHz to ensure accurate conversions.
To use an external voltage reference, connect the external reference voltage to the VREF pin and set the VREF bit in the control register to '1'. This will disable the internal voltage reference and use the external reference instead.
The EOC pin is an output pin that goes low when the ADC conversion is complete. It can be used to interrupt the microcontroller or to trigger the next conversion.
Yes, the PCF8591TD can be used as a DAC. It has a 8-bit DAC output that can be used to generate analog output voltages. The DAC output is available on the VOUT pin.
The PCF8591TD ADC does not require calibration. It has an internal calibration circuit that ensures accurate conversions. However, it's recommended to perform a self-calibration procedure by reading the ADC output with the input pins shorted together and then adjusting the offset and gain accordingly.
