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Part Number: ADS1298R
I'm trying to collect the respiration data from the ADS1298. I have set resp register as F2 and config 4 to 22. but I'm not getting respiration wave form. the data collected for resp is plotted and attached bellow. please see to it and suggest me where i might have gone wrong.
It looks like the measurment is being dominated by 50/60Hz noise. Typically, this noise can be canceled out using the RLD feature of the device. There are several posts on the forum and BIOFAQ on how to solve this. https://e2e.ti.com/support/data-converters/f/73/p/772058/2855202
Alex SmithApplications Engineer | Precision Delta-Sigma Converters
Check out our helpful resources: BIO-FAQ: Common Questions for TI's ADS129x Family of Bio-Potential ADCs
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In reply to Alexander Smith:
I'm working on ADS1298ECG_kit to collect respiration data by connecting electrodes to the subject. the jumper connection made for this is JP36, JP34 and JP35 (2-3) respectively. I'm unable to get the waveform as mentioned in the datasheet. I'm attaching the GUI configuration image and output waveform graph, please see to that and guide me where i have done mistake.
In reply to Abhiranjini B A:
Before we worry about the respiration signal, are you able to read a known signal such as a sine wave from a signal generator?
Are you wanting to use a internal or external reference voltage?
Can you please suggest what voltage range we have to set in signal generator and also suggest the lead connection scenario to signal generator.
we are using internal reference voltage.
This depends on the reference voltage and gain settings that are being used. Something like +/-250mV should be fine.
Please see these posts for further detail: https://e2e.ti.com/support/data-converters/f/73/t/379380?tisearch=e2e-quicksearch&keymatch=ads1298%20analog%20inputs
can we use simulator directly with 20 respiration rate instead of signal generator?
and if we have to using signal generator , then suggest what should be the frequency range given for RA and LA.
That would be fine. Measure the output from the signal generator, measure the input directly at the pins, then see what the data output looks like. This should help narrow down where the issue is.
we have tested for sine wave as per your suggestion(300mv, <20Hz). the waveform acquired is posted below.
For the above picture, was your reference buffer enabled? If not, please enable the reference buffer and try again.
Is this on channel 1 and was the respiration enabled? If yes, please disable the respiration feature and try again.
The reference buffer is enabled.
we are not getting any data from channel 1 in respiration disabled mode. i have attached the screenshot of that.
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