AD7609 multi-channel analog signal synchronous acquisition system based on FPGA

Abstract

The invention discloses an AD7609 multi-channel analog signal synchronous acquisition system based on an FPGA. The AD7609 multi-channel analog signal synchronous acquisition system comprises an FPGA chip, an OPA2227 chip, an AD8139 chip, an AD7609 chip, a serial port chip and an upper computer, wherein the three OPA2227 chips are electrically connected with the three AD8139 chips respectively to form three analog signal input channels, the three AD8139 chips are electrically connected with the AD7609 chip at the same time, and the AD7609 chip, the FPGA chip, the serial port chip and the uppercomputer are electrically connected in sequence; through the optimized system hardware circuit design, the FPGA is subjected to hardware programming, multiple paths of external analog current signalsare received, and multiple paths of analog signals can be synchronously collected.

Description

technical field [0001] The invention relates to the technical field of analog signal acquisition, in particular to an FPGA-based AD7609 multi-channel analog signal synchronous acquisition system. Background technique [0002] The mutual conversion between analog signals and digital signals is of great significance. Digital signals have the advantages of simple structure, strong anti-interference, good stability, and easy large-scale integration. Using digital signals to process analog signals is important in signal processing, transmission, There are obvious advantages in terms of storage and so on. With the rapid development of integrated circuit technology and technology, the performance of digital circuits has been continuously improved, the integration level and scale have become larger and larger, and the cost has been continuously reduced. It is very common to use digital signals to process analog signals. [0003] Most of the existing analog signal acquisition method...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing analog signal acquisition methods are single-channel analog signal acquisition formed by a single acquisition chip (such as: ADS1210 analog / digital acquisition chip). To realize synchronous acquisition of multi-channel analog signals, multiple acquisition chips need to be integrated and the circuit design is complicated. , high cost, and unable to achieve strict multi-channel synchronous acquisition

In the existing multi-channel analog signal acquisition methods, single-ended signal input (such as: ADS1258 analog / digital acquisition chip) is generally used. Compared with differential signals, the anti-interference performance is poor, and the problem of terrain difference needs to be considered, and it is susceptible to external electromagnetic interference. high power consumption

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