What is single slope ADC?
What is single slope ADC?
The simplest form of an integrating ADC uses a single-slope architecture (Figures 1a and 1b). Here, an unknown input voltage is integrated and the value compared against a known reference value. The time it takes for the integrator to trip the comparator is proportional to the unknown voltage (TINT/VIN).
WHAT IS A to D and D to A converter?
A D/A converter takes a precise number (most commonly a fixed-point binary number) and converts it into a physical quantity (example: voltage or pressure). D/A converters are often used to convert finite-precision time series data to a continually varying physical signal.
What are ADC slopes?
Dual slope ADC: Dual-Slope integration type ADC is the most accurate type of ADC because of non-dependency on variation in components values caused by noise. It is quite slow in nature and used in application as digital voltmeter, multimeters etc.
What is difference between single slope and dual slope ADC?
Dual slope ADC is preferred over the single slope analog to digital converter. As the reference voltage, resistor R, and capacitor C are fixed for a given analog to digital converter, the input voltage is directly proportional to time.
How does single-slope ADC work?
The is the basic idea behind the so-called single-slope, or integrating ADC. Instead of using a DAC with a ramped output, we use an op-amp circuit called an integrator to generate a sawtooth waveform which is then compared against the analog input by a comparator.
What is the drawback of single-slope a D converter?
However, the main disadvantage of the single-slope architecture is that it is relatively slow which results in relatively high power consumption. For each ADC channel, an n-bit A/D conversion takes 2 n comparator decisions.
How does an A D converter work?
ADCs follow a sequence when converting analog signals to digital. They first sample the signal, then quantify it to determine the resolution of the signal, and finally set binary values and send it to the system to read the digital signal. Two important aspects of the ADC are its sampling rate and resolution.
Where is DAC used?
DACs are commonly used in music players to convert digital data streams into analog audio signals. They are also used in televisions and mobile phones to convert digital video data into analog video signals.
How does single slope ADC work?
What is dual slope A D converter?
In dual slope type ADC, the integrator generates two different ramps, one with the known analog input voltage VA and another with a known reference voltage –Vref. Hence it is called a s dual slope A to D converter.
What is the drawback of single slope a D converter?
What is the reason to use dual slope A D converter in digital voltmeter?
The advantage of using a dual-slope ADC in a digital voltmeter is that its accuracy is high. Dual slope ADC: 1. Dual slope integration type ADC is the most accurate type of ADC because of non-dependency on variation in component values caused by noise.
What is the difference between single slope and dual slope ADCs?
The article shares the working of single and dual ADCs, benefits, downsides, and applications. Dual slope ADC is preferred over the single slope analog to digital converter. For a clear conception of the dual-slope ADC, we will study the single slope first. It consists of an integrator and a comparator.
How does a dual-slope analog to digital converter work?
The integrator of a dual-slope analog to digital converter has a switch at its input side which can either connect to a reference voltage or an input voltage. Initially in the conversion, the switch is connected to the input voltage and the integrator integrates the input voltage until its output equals the applied voltage.
How does the input voltage affect the slope of a single-slope ADC?
The input voltage only affects the time. Higher the input voltage, more time will be taken for the integration process while the slope remains the same. As clear from the graph this ADC has a single slope which leads to its name as Single slope ADC. If the input voltage is fixed and R or C changes then the slope changes.