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Introduction. Digital-to-analog converters (DACs) are usually used as an interface between digital systems and continuous analog circuitry. To choose the type of DAC best suited for an application, the designer must consider many important performance measures.
31 sty 2003 · 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.
A delta-sigma DAC encodes a high-resolution digital input signal into a lower-resolution but higher sample-frequency signal that is mapped to voltages, and then smoothed with an analog filter. In both cases, the temporary use of a lower-resolution signal simplifies circuit design and improves eficiency.
Title: Sigma-Delta ADCs and DACs Application Note (AN-283) Author: Analog Devices, Inc. Created Date: 0-01-01T00:00:00Z
Sigma-Delta ADCs and DACs. SIGMA-DELTA OVERVIEW. Within the last several years, the sigma delta architecture has become more and more popular for realizing high-resolutionADCs in mixed-signal VLSI processes. Until recently, however, the process technology needed to make these devices commercially viable has not been available.
Digital-to-Analog Converters (DACs or D/As) Introduction What we commonly refer to as a DAC today is typically quite a bit more. The DAC will typically have the converter itself and a collection of support circuitry built into the chip. The first DACs were board level designs, built from discrete components, including
The Sigma Delta Modulator is the core of realizing digital ADCs and DACs. Input data is driven into the modulator and has the feedback path immediately subtracted from it. It’s then integrated into an accumulator and passed into a comparator, with the output creating a train of pulses.
