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If i give a 3Vp-p sine wave input signal from a function generator,the output will get with reference to common mode voltage or 0V???
i have connected the ADS805 as attached image file.
Thanks
Eashwar
Eashwar,
If your input is from 0 - 3V, you will need to provide a Vref voltage of 1V, set the ADC to external Vref mode, and provide 1.5V to IN-. This will give you a balanced output using your 0-3V input on IN. See Figure 10 on page 11 of the ADS805 data sheet. If you use the circuit shown as is with a 0-3V input, once your input exceeds 0.5V, you will be clipping.
Regards,
Jim