The primary disadvantage of the flash A/D converter is the large number of comparators required.

More Questions from Interfacing to the Analog World

• A simultaneous, multiple comparator, or flash converter uses parallel encoding.
• A CD player probably uses a sigma/delta D/A converter.
• One way to determine the resolution of a DAC is to calculate the ratio of one step voltage to the maximum output voltage.
• A light bulb and a switch are examples of an analog circuit.
• A summing op-amp can be used for DAC.
• Voltage-to-frequency ADC is more complicated than other ADCs.
• One form of a sigma/delta modulator circuit is designed to convert a continuous analog signal into a modulated bit stream (A/D).
• Flash A/D converters depend on an input clock pulse to perform each conversion.
• The time required to complete a conversion cycle is called conversion time.
• An operational amplifier is used as a comparator.

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