Analog-digital conversion device

Abstract

The invention relates to an analog-digital conversion device and particularly relates to an analog-digital conversion device which is capable of programming regulating voltage reference and gain accuracy. The analog-digital conversion device comprises a data processing module, an analog acquisition module, a voltage reference upper limit module, a voltage reference lower limit module, a communication interface module, a display module, a power source module, a clock module and a resetting module. Compared with analog-digital conversion devices with same resolution digits, the analog-digital conversion device provides programmable voltage reference upper limit Vref+ and voltage reference lower limit Vref-, so that an analog-digital conversion chip of the device is higher in resolution, and conversion accuracy is higher; and simultaneously, the analog-digital conversion chip which can program gain is used, so that the analog-digital conversion device is more suitable for collecting small voltage signals.

Description

technical field [0001] The invention relates to an analog-to-digital conversion device, in particular to an analog-to-digital conversion device with programmable adjustable voltage reference and gain precision. Background technique [0002] As a commonly used electronic device, the analog-to-digital converter is used to convert the collected data in the analog circuit and send it to the processor of the digital circuit for processing and analysis. Its working principle is to correspond the analog voltage to the digital signal, and determine the corresponding digital quantity according to the difference relationship between the acquisition voltage and the reference voltage reference. Currently commonly used analog-to-digital conversion devices generally use a fixed voltage reference. This method fixes the sampling range and sampling accuracy of the analog quantity, so its applicability is also limited to a certain extent. Now, with the improvement of sensor technology and th...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an analog-to-digital conversion device that solves the shortcomings of conventional digital-to-digital conversion devices, such as limited measurement accuracy and low acquisition accuracy for low-voltage signals, and a programmable voltage reference and gain.

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