Hey,
I'm looking at using a PCM1808 ADC however something is kind of confusing me with the datasheet. The Electrical Characteristics table gives a center voltage of 0.5Vcc, and the absolute max for the analog input is from -.3V to 6.5V. This makes sense as the power supply range is only 5V to 0V. What doesn't is the recommended circuit has a 1uF capacitor in series with the analog signal. That would completely remove the .5Vcc DC offset that would be required. What am I missing here?
Datasheet:
http://focus.ti.com/lit/ds/symlink/pcm1808.pdf
Thanks,
Trevor
I'm looking at using a PCM1808 ADC however something is kind of confusing me with the datasheet. The Electrical Characteristics table gives a center voltage of 0.5Vcc, and the absolute max for the analog input is from -.3V to 6.5V. This makes sense as the power supply range is only 5V to 0V. What doesn't is the recommended circuit has a 1uF capacitor in series with the analog signal. That would completely remove the .5Vcc DC offset that would be required. What am I missing here?
Datasheet:
http://focus.ti.com/lit/ds/symlink/pcm1808.pdf
Thanks,
Trevor