An ADC (analog-to-digital converter) is used to convert analog signals, such as voltage or current, into digital signals that can be processed by a digital system.
Yes, ADCs can convert high frequency signals. However, the maximum frequency that an ADC can accurately convert depends on its sampling rate and resolution.
The sampling rate of an ADC is the number of times per second that it takes a measurement of the analog signal. It is typically measured in samples per second (SPS) or kilosamples per second (kSPS).
The resolution of an ADC is the number of discrete levels it can represent in its digital output. It is typically measured in bits, with higher resolution meaning a greater number of possible output values and therefore a more accurate conversion.
The maximum frequency that an ADC can accurately convert depends on its sampling rate and resolution. As a rule of thumb, the maximum frequency that can be accurately converted is equal to half of the sampling rate, also known as the Nyquist frequency.