There is a complete circuit solution using the AD8495 interface to the ADC. I can refer you to the circuit note CN-0271. Please refer to the link http://www.analog.com/media/en/reference-design-documentation/reference-designs/CN0271.pdf . The ADC used in this circuit note is AD7790, a sigma Delta ADC which is suitable for this type of application. The AD779x has many family and you can search ADI site for other product family. The AD7790 uses SPI interface which can be interface to an FPGA or DSP that operate SPI signals, you can refer to the timing details on the AD7790 datasheet. The circuit note also has a wiki page CN-0271 wiki. Please let us know if you have other inquiries.
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