ESP32 ADC daim

The ESP32 ADC (Analog-to-Digital Converter) has a 12-bit resolution, which means it can represent analog signals with a resolution of 1/4096 of the reference voltage. The reference voltage can be either the internal 1.1V reference or an external voltage applied to the VREF pin.

The ADC can sample up to 18 channels with a maximum sample rate of 2 Msps (mega-samples per second). However, the actual sampling rate and number of channels depend on the selected ADC configuration and the CPU load.

The ESP32 ADC supports several input modes, including single-ended, differential, and GPIO input modes. The single-ended mode measures the voltage between the input pin and ground, while the differential mode measures the voltage difference between two input pins. The GPIO input mode allows the ADC to read the voltage level of a GPIO pin.

The ESP32 ADC also features a built-in voltage divider that allows it to measure voltages up to 3.3V without damaging the ADC input. Additionally, the ADC can be configured to use an external voltage divider to measure higher voltages.

Overall, the ESP32 ADC provides a versatile and powerful analog input capability that can be used in a wide range of applications, such as sensor monitoring, audio processing, and power management.