PCM1809: How to get DC signal?

Hi Lakshmi

Thank you for your reply.

Looks like TAA3020 is expansive than PCM1809.

My customer want use this chip as Medical SPO2 Receiver, And could you help me to confirm, In this demand, Is this the most suitable and cheapest chip product? Thank you very much.

Single-channel, analog part can supply in 3.3V, sample rate greater than 16K, preferably an internal reference source, Resolution greater than 16bit. 

Hi Tony,

1) Does customer want to measure DC voltage specifically? Or do we have a specific signal bandwidth?

2) Here are a list of sampling rates supported by the TAA3020 device:

Thanks and Regards,

Lakshmi Narasimhan

Yes they need get DC voltage.

OK , TAA3020 is good devices for this case? most cheap?

Hi Tony,

You've mentioned resolution > 16-bit. Does customer have requirements for accuracy specs as well?

Thanks and Regards,

Lakshmi Narasimhan

I will check ， but currently we don't hear about accuracy concern from customer evaluate PCM1809

Hi Tony,

Apologies for the delay. I will respond to this by end of this week.

Thanks and Regards,

Lakshmi Narasimhan

Hi Lakshmi

Understood , Please help me check . Customer also check TAA3020 spec in same time.

Customer feedback is : TAA3020 HPF can not bypass, only can adjust the cutoff frequency. Do you have some comment? how to bypass HPF and get the DC signal?

Thank you very much.

Hi Narasimhan

TAA5212 looks more expansive than TAA3020.

If customer use TAA3020 to get DC voltage , Is there any risk?

And do you know the resolution of TAA3020 ? We need large than 16 bit.

Thank you very much.