High-precision analog-to-digital converter fuse automatic burning system and method

Abstract

The invention discloses a high-precision analog-to-digital converter fuse automatic burning system and method, and belongs to the technical field of digital-to-analog converters. An FPGA module receives a burning control signal sent by an upper computer through a USB-to-SPI controller and burning code stream data of each fuse in a fuse array arranged according to a preset sequence, generates a control instruction and sends the control instruction to a burning module, wherein the control instruction comprises a burning control signal, burning code stream data of a fuse array and a work controlsignal; the burning module comprises a trimming code burning circuit and an ADC chip to be burnt; the trimming code burning circuit receives the control instruction and forwards the control instruction to the ADC chip to be burnt; and the ADC chip to be burnt performs burning according to a burning control signal in the control instruction, enters a burning state, sends burning code stream data ofthe fuse array in the control instruction to a receiving pin of the ADC chip to be burnt according to bits, and each fuse is burned according to bits by the ADC chip to be burnt, so as to realize burning of the whole ADC chip fuse array to be burnt.

Description

Technical field [0001] The invention relates to a high-precision analog-to-digital converter fuse automatic burning system and method, and belongs to the technical field of digital-to-analog converters. Background technique [0002] With the continuous development of electronic technology, analog-to-digital converters have become more and more important as an interface between the analog and digital world. High-precision converters have the characteristics of low power consumption, low noise, and wide input range, and are widely used in many fields such as environmental monitoring, digital acquisition systems, and instrumentation. [0003] The successive approximation register (Successive Approximation Register, SAR) structure has the advantages of wide input range, low power consumption, reusability, etc. Most high-precision analog-to-digital converters are designed based on this structure. However, in the converter production process, due to the limitations and instability of th...

AI Technical Summary

Problems solved by technology

However, in the production process of the SAR structure analog-to-digital converter, it is impossible to directly measure the internal capacitance to realize the trimming of its capacitance. It can only be measured after the parameter performance, and the capacitance value of the mismatched capacitance is obtained by calculation, and then the corresponding to a specific fuse

However, the number of fuses in the fuse array of the SAR structure analog-to-digital converter with more than 16 bits has reached hundreds of pieces. Manually burning each fuse is not only time-consuming, but also has a low success rate of burning.

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