ADS1298: Accessing respiration signal for external data acquisition

David Hunter68

Part Number: ADS1298

Hi, I'm trying to use the ADS1298RECG-FE PDK to acquire respiration signals. I have the board working and I can acquire data on Windows 10 (after some work!), but I'd really like to record the data on an external data acquisition system. Is it possible to access the demodulated respiration signal on the board somewhere?

Thanks,

-David

over 7 years ago

0 Alexander Smith over 7 years ago

TI__Guru 55342 points

Hello David,

Thanks for your interest in the ADS1298 and welcome to the forums!

The signal is demodulated within the part, so unfortunately it cannot be accessed externally.

0 David Hunter68 over 7 years ago in reply to Alexander Smith

Prodigy 20 points

Is there any way to use an analog output to output the demodulated signal?

0 Alexander Smith over 7 years ago in reply to David Hunter68

TI__Guru 55342 points

David,

Unfortunately, no.

Page 25. of the datasheet shows the functional block diagram of the device. You can see at the top of the page the RESP DEMOD block is connected after PGA1 and before ADC1. This trace cannot be accessed externally.

www.ti.com/.../ads1298.pdf

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ADS1298: Accessing respiration signal for external data acquisition