ADS1299: Regarding the testing of external large signals

di wu

Part Number: ADS1299

Tool/software:

The internal test signal has been tested. I would like to test the 1V voltage output by the DC stabilized power supply. Can I collect and convert it for output? May I ask how I will configure registers for data collection? Is it necessary to use a reference electrode and a bias electrode to collect this fixed 1V voltage? Or should we directly connect the positive pole of the 1V voltage to the P terminal of the channel and the negative pole to the N terminal? I hope to receive a response from the engineers. Thank you very much.

over 1 year ago

0 Ryan Andrews over 1 year ago

TI__Guru 69076 points

Hi Di,

Please follow the recommended flow chart in section 10.1.2 for basic data capture example.

May I ask what is your application and why you have chosen the ADS1299?

Regards,

Ryan

0 di wu over 1 year ago in reply to Ryan Andrews

Prodigy 90 points

Hi Ryan

Thank you very much for your reply. I chose ADS1299 to measure human signals such as EEG signals. As for measuring 1V voltage, my teacher wants me to use a DC stabilized power supply to output 1V voltage, and then use an acquisition board to collect this signal to verify whether the acquisition circuit board is correct.

0 di wu over 1 year ago in reply to Ryan Andrews

Prodigy 90 points

May I ask if there is a problem with connecting my reference electrode to SRB1 through OPA's operational amplifier?

+1 Ryan Andrews over 1 year ago in reply to di wu

TI__Guru 69076 points

Hi Di,

This is fine. You can refer to the schematic for our ADS1299 EVM (ADS1299EEGFE-PDK) where we have shown a similar buffer option for the reference electrode.

Regards,

Ryan

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ADS1299: Regarding the testing of external large signals