A kind of automatic test equipment for high precision adc measurement

Abstract

The invention discloses an automatic test platform for high-precision ADC measurement. The automatic test platform includes a PC, a power source adapter, a high-precision ADC simulation performance integrated testing instrument, a splitter and multiple-socket / assessment board connectors. The objective of the invention is to decrease inconvenience caused by operation in manual testing. According to the automatic test platform, an ADC testing system board capable of carrying out automatic testing is designed; a high-precision DAC is adopted as a signal source to replace a sensor and a potentiometer; the main performance parameters of the ADC, such as offset error, gain error, nonlinearity, working voltage rejection ratio and common-mode input rejection ratio, are tested; a differential input mode is adopted; multi-stage PGA amplification is supported; input common-mode signals are adjustable; the power source of a tested device is digitally adjustable; and as long as the automatic test platform is connected with upper computer software through a USB, automated testing can be realized.

Description

technical field [0001] The invention relates to a data transmission module, in particular to an automatic test device for high-precision ADC measurement. Background technique [0002] As the accuracy of ADCs continues to improve, so does the research on high-precision ADC measurements. For the measurement of high-precision ADC, especially the high-precision of more than 16 bits, it is easily affected by the environment and the influence of human operation, and the measurement parameters are likely to be deviated. For example, high-precision potentiometers are traditionally used the most. When measuring temperature characteristics, there are often several pieces of data, some of which have large deviations. There are many influencing factors, the main factors are: the interface between the potentiometer and the ADC, the switching accuracy of the potentiometer and the movement of the wiring. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provi...

AI Technical Summary

Problems solved by technology

For the measurement of high-precision ADC, especially the high-precision of more than 16 bits, it is easy to be affected by the environment and human operation, and the measurement parameters are likely to deviate

For example, the most traditionally used is the high-precision potentiometer. When measuring the temperature characteristics, it often appears that there are some large deviations among several pieces of data.

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