What is an A/D converter?
A/D Converter Configuration 1 (Flash type)
This type of ADC utilizes 2N-1 comparators (for an N bit converter) to compare the analog signal with successive reference voltages. The results are then converted into digital format using an encoder.
- Analog signals are converted into digital signals directly (since the comparators themselves are the sampling devices), making a Sample and Hold circuit unnecessary.
- This allows for extremely fast conversion (with sampling frequencies above 1GHz possible).
- However, the relatively larger size and power consumption (due to the number of comparators are required: 2N-1) limit resolution to around 8bits.