What is figure of merit in ADC?

What is figure of merit in ADC?

ADC Figures of Merit. • Objective: Establish measure/s to compare. performance of various ADCs. • Can use FOM to combine several. performance metrics to get one single.

Where are SAR ADC used?

Common Applications. The SAR ADC is the commonly used architecture for data acquisition systems that are widely employed in medical imaging, industrial process control, and optical communication systems. In these applications, we usually need to digitize the data generated by a large number of sensors.

How is ADC value calculated?

The equation used to calculate the ADC value was as follows: ADC = −ln (S / S0) / b, where S0 is the signal intensity of no diffusion gradients and b is the b value.

What is a good figure of merit?

In short, I would say that: A good figure-of-merit should accurately reflect the merits of the ADC in the context and for the purpose which the figure-of-merit is used.

How is ADC step size calculated?

For an 8-bit ADC, the step size is Vref / 256 because it is an 8-bit ADC, and 2 to the power of 8 gives us 256 steps. See Table 11.1. If the analog input range needs to be 0 to 4 volts, Vref is connected to 4 volts. That gives 4 V / 256 = 15.62 mV for the step size of an 8-bit ADC.

How do you calculate ADC time conversion?

1. Keep the APB2 CLOCK at 50 MHz.
2. I am using 12 bit Resolution for this purpose, so the Cycles = 12.
3. Use the prescalar as 4. This is bring the ADC CLOCK to 12.5 MHz.
4. Use the Sampling Time of 112 CYCLES.
5. Now conversion Time = (112 + 12) / 12.5 MHz = 9.9 us.

How do you calculate sampling rate for ADC?

The sample rate for an ADC is defined as the number of output samples available per unit time and is specified as samples per second (SPS). Two aspects of sample rate that must be considered when selecting an ADC for a particular application are the minimum sample rate and maximum sample rate.

How do you calculate ADC error?

The gain and offset error will be calculated using the equation of a straight line y = mx + b, where m is the slope of the line and b is the offset. The gain error can be calculated as the slope of the actual ADC output divided by the slope of the ideal ADC output.

What is SAR ADC and how does it work?

The majority of modern SAR ADC implementations is based on switched capacitor circuits and includes a capacitive digital-to-analog converter (DAC) that is used to perform radix-based search. To get the maximum power and area savings these capacitors need to be minimized to the point where the resolution becomes limited by the thermal noise.

Can successive approximation register (SAR) ADCs be used in GHz sampling range?

A dominantly digital nature of successive approximation register (SAR) ADCs makes them a good candidate for an energy-e\cient and scalable design, but its sequential operation limits its applicability in the GHz sampling range.

What is the goal of this research paper on ADCs?

The goal of this research is to develop techniques for improving the energy e\ciency of the ADCs operating in 2-3GHz sampling frequency range with resolution around 8 e\ective CHAPTER 1. INTRODUCTION 3 bits.