FlashADC

FlashADC refers to a type of analog-to-digital converter (ADC) that utilizes a parallel architecture to achieve very high conversion speeds. Unlike other ADC architectures that convert a single analog input sequentially, a Flash ADC employs a bank of comparators, each set to a different voltage threshold. When an analog input signal is applied, all comparators simultaneously compare the input voltage to their respective thresholds. The outputs of these comparators, which form a thermometer code, are then converted into a digital output by a priority encoder. This parallel processing allows for extremely fast conversion times, making Flash ADCs suitable for applications requiring high bandwidth signal acquisition. The main trade-off for this speed is a relatively high power consumption and a significant number of components, which can lead to a larger die size and higher cost, especially for higher resolution designs. Common applications include digital oscilloscopes, radar systems, high-speed data acquisition, and telecommunications. The resolution of a Flash ADC is typically limited due to the exponential increase in the number of comparators required for higher bit depths.