Cost-effective 0-10V analog signal isolation technology: based on Y capacitor isolation

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Cost-effective 0-10V analog signal isolation technology: based on Y capacitor isolation [Copy link]

The 0-10V analog signal is converted into a modulated signal by the APC chip GP9301M, and then transmitted to the PAC chip GP8101M after passing through the isolation capacitor. The GP8101M demodulates the modulated signal and outputs a 0-10V analog voltage. This solution has a simple circuit and a typical accuracy of 0.5%.

In the isolation system, common-mode interference is often suppressed by placing Y capacitors on the primary and secondary sides. The capacitance of the Y capacitor is generally small (nF level), which effectively reduces system EMI while ensuring AC leakage.

In the analog signal capacitor isolation solution referred to in this article, Y capacitors are used as the medium for analog signal transmission. While ensuring the isolation performance, the transmission of analog signals is also realized, which has a very good cost-effectiveness compared to traditional isolation solutions.

GP9301_cn_V2.1.pdf (630.48 KB, downloads: 16)

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GP8101_cn_V1.9.pdf (419.68 KB, downloads: 11)

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dcexpert

Collected first

bigbat

Thanks, the price is very advantageous

hanzhen91

The capacitive isolation solution can effectively solve the problem of insufficient isolation of optocouplers in high-voltage applications. As a supplementary solution for signal isolation, it can also solve the delay problem of optocouplers and achieve lossless transmission.