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csignal-processingadcphasesar
Dhruvi Patel
Dhruvi Patel

Reputation: 1

Use of SAR ADC for phase angle measurement

I am new in programming, I am using 12 bit Ad7352 SAR ADC from analog devices. By using that I want to measure Phase angle between two voltage signals. The amplitude of both signals can be different but the frequency of both signals is the same and that is line frequency 50Hz, I get the accuracy of +-0.45 degrees by zero-crossing interpolation method, what should I do next to get +-0.05 degrees of accuracy? The application of this project is in energy metering. I tried autocorrelation and FFT in MatLab, but I need a c-language code for the same because my platform is MSP430 from TI. and I also welcome any new algorithm to try, Thanks all in advance.

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