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ads1292 filter and power down procedure

Thomas Chang15933
Expert 4770 points
Other Parts Discussed in Thread: ADS1292

Hi Team:

 Our customer already done ECG with ADS1292,and have 2 questions need your reply.

1. Internal Filter: How to calculate internal filter at 250 SPS? We find EVM user guide onlyshow filter at 500SPS . Or is it external filter?

2.  In datasheet there are many power down procedure, but it dosn't work during our measurement. Could you tell me the correct power down process in the ADS1292?

  • 0
    TI__Guru 57296 points

    Hello Thomas, 

    Thanks for your questions.

    1. By internal filter, are you referring to the digital filter? The -3dB bandwidth of the digital filter is dependent on the Data Rate and can be calculated as 0.262*fDR.

    2. The ADS1292 can be put into Power-Down mode by holding the /PWDN/RESET pin low for more than 29*fMOD. Once the device is powered-down, you will follow the same Power-On Reset procedure listed in on Page 62 of the datasheet. All registers will have to be rewritten to their former values. Is this what you were trying to do?

    Best Regards,