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The Cortex®-M4 core includes a precise 16‐bit sigma‐delta ADC. This application note outlines the main features of the SDADC and shows how the SDADC can be used in some application cases: temperature measurement using PT100, pressure measurement using MPX2102A, wave recorder, and electrocardiogram (ECG) acquisition.
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.
Title: Sigma-Delta ADCs and DACs Application Note (AN-283) Author: Analog Devices, Inc. Created Date: 0-01-01T00:00:00Z
The simplest structure of all is the Kelvin divider or string DAC as shown in Figure 6.2. An N-bit version of this DAC simply consists of 2 N equal resistors in series and 2 N switches (usually CMOS), one between each node of the chain and the output.
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.
Because the noise-shaping feed-back signal is not crossing the analog-digital boundary, the name Sigma-Delta DAC is confusing and misleading. A Sigma-Delta DAC is the combination of a DD converter and a high-speed few-bit DAC. In Fig. 2.6 the complete Sigma-Delta DAC structure is shown.
