An eight-bit D/A converter has a resolution of 0.125.

More Questions from Interfacing to the Analog World

• If the least significant bit (LSB) of a four-bit binary-weighted resistor D/A converter connects to a 200 Ω resistor, then the resistor needed for the next bit is 100 Ω.
• It is possible to develop more than 16 different analog levels using 4-bit resolution.
• Generally speaking, DACs with a current output will have a shorter settling time than those with voltage outputs.
• D/A conversion is the process of taking a voltage or current and converting it to a digital code.
• Linearity error is the maximum deviation in step size from the ideal step size.
• The DAC0808 and the MC1408 are very popular and inexpensive 8-bit D/A converters.
• The primary disadvantage of the flash A/D converter is the large number of comparators required.
• 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.

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