What are the various types of ADC architectures explain any two architectures?
The most popular ADC architectures available today are successive approximations (sometimes called SAR because a successive-approximations (shift) register is the key defining element), flash (all decisions made simultaneously), pipelined (with multiple flash stages), and sigma-delta (SD), a charge-balancing type.
What is analog to digital converter specs?
DC accuracy The ADC specifications that describe this type of accuracy are offset error, full-scale error, differential nonlinearity (DNL) , and integral nonlinearity (INL) . These four specifications build a complete description of an ADC’s absolute accuracy.
What is analog to digital converter examples?
Examples of analogue signals include temperature, pressure, liquid levels and light intensity. For a digital circuit the potentiometer wiper has been replaced by a single rotary switch which is connected in turn to each junction of the series resistor chain, forming a basic potential divider network.
What is the application of Sigma Delta architecture?
Several applications for Delta-Sigma converters are included. Modern Sigma-delta converters offer high resolution, high integration, low power consumption, and low cost, making them a good ADC choice for applications such as process control, precision temperature measurements, and weighing scales.
What is DAC architecture?
The first architecture to consider is the string DAC or sometimes called the Kelvin divider DAC. The string DAC is one of the simplest methods to realize a DAC and is simply a collection of resistors in series with switching points or tap nodes between each of the resistors.
What are the types of analog-to-digital converter techniques?
There are really five major types of ADCs in use today:
- Successive Approximation (SAR) ADC.
- Delta-sigma (ΔΣ) ADC.
- Dual Slope ADC.
- Pipelined ADC.
- Flash ADC.
What are the specifications of DAC?
Specification for DAC (Digital to Analog Converter):
- Resolution.
- Accuracy.
- Linearity.
- Temperature sensitivity.
- Settling Time.
- Speed.
- Long term drift.
- Supply rejection.
What is important specification of ADC?
Like DAC, ADCs are also having many important specifications. Some of them are Resolution, Quantization error, Conversion time, Analog error, Linearity error, DNL error, INL error & Input voltage range.
What is the application of ADC?
Application of ADC Used in computer to convert the analog signal to digital signal. Used in cell phones. Used in microcontrollers. Used in digital signal processing.
How does ADC convert analog to digital?
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.
What is a delta-sigma analog-to-digital converter?
The design of delta-sigma (∆Σ) analog-to- digital converters (ADCs) is approximately three-quarters digital and one-quarter analog. ∆Σ ADCs are now ideal for converting analog signals over a wide range of frequencies, from DC to several megahertz.
What is Sigma Delta σ Δ ADC?
Delta-sigma (ΔΣ; or sigma-delta, ΣΔ) modulation is a method for encoding analog signals into digital signals as found in an analog-to-digital converter (ADC).
What are the different DAC architectures?
Three precision DAC architectures: string DAC (a); R-2R DAC (b); and multiplying DAC or MDAC (c). These architectures are the string DAC, R-2R DAC, and multiplying DAC. In all cases, these devices use a digital input code to generate an analog output signal.
What are the main elements of DAC?
1. The DAC consists of a logic circuit connected to resistors, each of which corresponds to a particular bit (for instance, an 8-bit DAC would have eight resistors, corresponding to 20 to 27). The resistors are of values weighted in a binary format (each resistor is a power of two stronger than the one before it).
What is application of ADC?
Application of ADC Used in computer to convert the analog signal to digital signal. Used in cell phones. Used in microcontrollers. Used in digital signal processing. Used in digital storage oscilloscopes.
What are the applications of DAC?
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. These two applications use DACs at opposite ends of the frequency/resolution trade-off.
What is a pipelined analog-to-digital converter?
The pipelined analog-to-digital converter (ADC) has become the most popular ADC architecture for sampling rates from a few megasamples per second (Msps) up to 100Msps+. Resolutions range from eight bits at the faster sample rates up to 16 bits at the lower rates.
How do digital to analog converters work?
The conversion result forms the most significant bits of the digital output. This same digital output is fed into an m -bit digital-to-analog converter, and its output is subtracted from the original sampled signal.
What are the different types of analog-to-digital converter architecture?
Analog-to-Digital Converter Architectures and Choices for System Design. 1 Converter Architectures. An overwhelming variety of ADCs exist on the market today, with differing resolutions, bandwidths, accuracies, architectures, 2 Flash Converters. 3 Pipelined Architecture. 4 Successive Approximations. 5 Sigma-Delta.
What is the difference between a pipeline and a pipelined ADC?
As with a pipeline, a SAR with more than 12 bits of accuracy usually requires some form of trimming or calibration. Despite the inherent parallelism, a pipelined ADC still requires accurate analog amplification in DACs and interstage gain amplifiers, and thus significant linear settling time.