АЦП GX7793 (AD7793) в платах DCS для сбора данных о промышленной температуре

ADCs play a vital role in DCS boards, which are important components used to monitor and control industrial processes by converting analog signals to digital signals for digital processing and control.

In a DCS board, the role of the ADC is to convert the temperature analog signals generated in the industrial system into digital signals for processing and control by the DCS system. This enables the DCS system to precisely control and regulate these signals.The selection of the ADC is critical to the performance and accuracy of the DCS board.

When selecting an ADC, key parameters such as its resolution, sampling rate, accuracy and stability need to be considered. It is also necessary to consider the compatibility of the converter with the DCS system and its adaptability in different industrial environments.

The GXSC GX7793 is a low-power, low-noise 24-bit sigma-delta ADC for use in industrial system DCS boards to provide the high-precision measurements required to meet the system‘s requirements.The GX7793 contains three differential analog inputs and also integrates an on-chip, low-noise instrumentation amplifier, which allows for the direct input of small signals.The GX7793 can be operated with either an internal clock or an external clock, and the output data rate can be set through software programming. The GX7793 can be clocked internally or externally, and the output data rate can be programmed by software to vary from 4.17 Hz to 940 Hz.

The GX7793 application advantages are described:

- 360µA typical power consumption from a 2.7V to 5.25V supply

- Up to 23-bit effective resolution

- Root-mean-square (RMS) noise: 38nV (at 4.17Hz); 79nV (at 16.7Hz)

- Supports 15 update rates: 4.17Hz~940Hz

- Gain steps 0.5/1/2/4/8/16/32/64/128 times selectable

- 16-pin TSSOP package.