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High voltage measurement

Hi, I would like to accurately measure voltages on the range of ~200V at frequencies up to 1kHz. I have been trying to use voltage dividers made with resistors but, unfortunately, I haven’t been able to make any which provides reliable phase information at my maximum frequencies. I was wondering if there was any ADC able to read such voltages. Otherwise, can someone point me to a better solution?

Thank you

Regards,         

JMGL