What is DAC circuit?
Table of Contents
What is DAC circuit?
Digital to Analog Converter (DAC) is an integrated circuit that converts digital signal to analog voltage/current which is necessary for further Analog Signal Processing.
What is Digital to Analog Converter & its working?
A digital-to-analog converter (DAC), as the name implies, is a data converter which generates an analog output from a digital input. A DAC converts a limited number of discrete digital codes to a corresponding number of discrete analog output values.
What are the types of DAC?
Types of DACs
- Weighted Resistor DAC.
- R-2R Ladder DAC.
What are the components 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 are the main elements of DAC?
Which circuit is used at the out put of DAC to get analog signal?
A weighted resistor DAC produces an analog output, which is almost equal to the digital (binary) input by using binary weighted resistors in the inverting adder circuit. In short, a binary weighted resistor DAC is called as weighted resistor DAC.
What are the parameters of DAC?
| Test Parameter | Unit |
|---|---|
| Logic Negative Power Supply (-VL) | V |
| Analog Output Impedance | kW |
| Gain Error or Full-Scale Error | mV or %FSR |
| Signal-to-Noise Ratio (SNR) | dB |
How many reference voltages does a DAC need?
Table 1. Requirements for DAC Design Examples
| Parameter | Design A | Design D |
|---|---|---|
| Example Application | Consumer audio device | Portable instrument |
| DAC | MAX5304, 10-bit single | MAX5176, 12-bit single |
| Minimum Reference Input Resistance | 18kΩ | 18kΩ |
| Output Voltage | Range = 0 -2.5V | Range = 0 -2.048V |
Which is the fastest ADC and why?
The flash ADC is the fastest type available. A flash ADC uses comparators, one per voltage step, and a string of resistors. A 4-bit ADC will have 16 comparators, an 8-bit ADC will have 256 comparators.
What is full-scale voltage in DAC?
signal, the DAC output is a staircase waveform that goes up 1 V per. step. When the counter is at 1111, the DAC output is at its maximum. value of 15 V; this is its full-scale output.
What are the characteristics of ADC?
The most basic of these characteristics are speed, resolution, dynamic range, and accuracy. ADC conversion speed refers to samples-per-second, and measures how quickly the device can accurately convert an analog signal/voltage.
How do you find the output voltage of a DAC?
- Concept:
- Resolution. It is the minimum change at the DAC output.
- Full-Scale Output. It is the total voltage level given to the DAC or in simple terms, it is calculated as:
- Calculation: Given output voltages are 5 V and input (1111) 2
- (1111) 2 = (15) 10 R e s o l u t i o n = 5 15.
- (1100) 2 = (12) 10
- Output = 4 V.
