How does a dual slope integrating 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 are the major applications of dual slope type ADC?
The dual slope ADC is used in the applications, where accuracy is more important while converting analog input into its equivalent digital (binary) data.
What is dual slope integration?
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.
How is dual slope ADC advantageous over ramp type 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 type ADC?
Comparison of major ADC Types
| ADC Type | Pros | Max Resolution |
|---|---|---|
| Successive Approximation (SAR) | Good speed/resolution ratio | 18 bits |
| Delta-sigma (ΔΣ) | High dynamic performance, inherent anti-aliasing protection | 32 bits |
| Dual Slope | Accurate, inexpensive | 20 bits |
| Pipelined | Very fast | 16 bits |
Why is dual slope method preferred over ramp techniques?
Why is dual slope method preferred over ramp techniques? Explanation: During the process of integration, noise is canceled out by the positive and negative ramps in the dual slope method. The input signal is integrated only for a fixed interval of time and this is the basis for the dual slope method. 2.
What is the advantage of dual slope ADC in a 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 are the advantages and disadvantages of dual slope ADC?
Linearity is very good and extremely high-resolution measurements can be obtained. Its main disadvantage is a slow conversion rate, often in the range of 10 samples/second. In applications where this is not a problem, such as in measuring temperature transducers, a dual-slope ADC is a good choice.
How does ADC work what are the ADC types?
These types of signals can come from sound, light, temperature and motion. 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.