What is a dual slope ADC?
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.
How does a dual slope ADC work?
Dual-Slope ADC Architecture A dual-slope ADC (DS-ADC) integrates an unknown input voltage (VIN) for a fixed amount of time (TINT), then “de-integrates” (TDEINT) using a known reference voltage (VREF) for a variable amount of time (see Figure 2).
What is the advantage of dual slope ADC?
The dual-slope ADC has many advantages. Noise present on the input voltage is reduced by averaging. The value of the capacitor and conversion clock do not affect conversion accuracy, since they act equivalently on the up-slope and down-slope.
What is dual slope technique?
In the dual-slope technique, an integrator is used to integrate an accurate voltage reference for a fixed period of time. The same integrator is then used to integrate with the reverse slope, the input voltage, and the time required to return to the starting voltage is measured.
What are the components needed to make a dual slope ADC?
As the name suggests, a dual slope ADC produces an equivalent digital output for a corresponding analog input by using two (dual) slope technique. The dual slope ADC mainly consists of 5 blocks: Integrator, Comparator, Clock signal generator, Control logic and Counter.
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.
Which application uses dual slope converters?
It is mostly used in digital voltmeters. In the dual-slope A/D converter, the leakage current of the capacitor can cause errors in the integration and consequentially, an error. These effects, in the dual-slope AID converter, will manifest themselves as a reading of the DVM when no input voltage is present.
Why is dual slope ADC preferred over single slope ADC?
Dual slope ADC is preferred over the single slope analog to digital converter. In the equation, we can see that the reference voltage is negative, so the slope of the integrated output voltage turns out to be positive.
Why is dual ADC called indirect ADC?
In general, first it converts the analog input into a linear function of time (or frequency) and then it will produce the digital (binary) output. Dual slope ADC is the best example of an Indirect type ADC.
Is dual slope ADC better than successive approximation ADC?
The dual slope, used mostly in measurement instruments such as a digital voltmeter, has a slow sampling rate. Successive-approximation ADCs have good resolution and moderately high sampling rate, while the flash converter offers the fastest sampling but typically has lower resolution.
What is the reason to use dual slope ADC 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 ADC and dual slope ADC?
What is a dual slope?
The first is single slope that will give you a slope in one axis or direction at a time. The second is a dual slope laser that will give you two slopes on separate axis at the same time.
What is ADC, working, types of ADCs?
1) Flash ADC This is the simplest type of ADC and as the name suggests the fastest. 2) Counting/Slope Integration ADCs Here, a ramp generating circuit is started at the time of conversion and a binary counter is started at the same time. 3) Successive Approximation ADCs
What is an AD converter?
What is an AD converter? Well, “AD” means “analog-to-digital.”So an AD Converter is basically a translator for audio. It takes audio from one end and changes it to something a computer can understand, spitting that out the other end. The result of analog-to-digital conversion is actually more common than you might realize.