It is possible to develop more than 16 different analog levels using 4-bit resolution.
When analog inputs from several sources are to be converted, a multiplexing technique can be used so that one ADC may be time-shared.
A D/A converter changes things such as temperature variations into digital quantities.
When a DAC output shows a deviation of the measured step size from the ideal step size, this error is called nonlinearity.
In a digital storage scope, when memory is full, the next data point is lost.
In a counter-ramp A/D converter, the end-of-conversion line must be tied back to the clear input of the counter to change the circuit to perform continuous conversions.
D/A conversion is the process of taking a voltage or current and converting it to a digital code.
A data acquisition system may communicate via two common buses: the data bus and the control bus.
The time required to complete a conversion cycle is called conversion time.
A DAC is ________ if its output increases as the binary input increments from one value to the next.
A simultaneous, multiple comparator, or flash converter uses parallel encoding.
A 4-bit stairstep-ramp A/D converter has a clock frequency of 100 kHz and maximum input voltage of 10 V.
An AD7524 is an eight-bit D/A converter that uses an R/2R ladder network.
The AD7524, a CMOS IC available from several IC manufacturers, is an eight-bit D/A converter that uses a(n) ________.
Flash A/D converters depend on an input clock pulse to perform each conversion.
The current across the MSB "rung" of a 4-bit R/2R ladder DAC if the reference voltage is 5 v and R is 8 is 625 A.
A DAC is monotonic if its output increases as its binary input is incremented from one value to the next.
The circuit shown below is a(n) ________.
What is the accuracy of a D/A converter?
Voltage-to-frequency ADC is more complicated than other ADCs.
Linearity error is the maximum deviation in step size from the ideal step size.
If an analog signal is to be converted to an 8-bit resolution, how many comparators are used in a parallel-encoded ADC?
There are many applications in which analog data must be digitized and transferred into a computer's memory. The process by which the computer acquires these digitized analog data is referred to as ________.
An operational amplifier is used as a comparator.
The DAC0808 and the MC1408 are very popular and inexpensive 8-bit D/A converters.
The primary disadvantage of the simultaneous A/D converter is ________.
Which of the equations below expresses the voltage gain relationship for an operational amplifier?
Two characteristics of ideal operational amplifiers are very high input impedance and very high voltage gain.
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