• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 2204 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS1293: ADS1293 LOD Issue

Nagaraj kumar kaliraj
Prodigy 30 points
Part Number: ADS1293

Hi,

I am using ADS1293 in my application. There SPI communication and all enabled registers are working properly. And Initially LOD also working. But, after few days the Lead of Detection(LOD) is not working. because of that, plotting page getting full of noisy. 

ECG peaks are good when placing on the body.  

After replacing the ADS1293 the LOD is working properly. what could be reason? please let me know if anyone the reason.

Best Regards,

Naga

  • 0
    TI__Mastermind 38745 points
    Hello Naga,

    Can you please provide your schematic and register settings?

    Regards,
    Brian Pisani
  • 0 in reply to Brian Pisani
    Prodigy 30 points

    Hello Brain,

    Thank you for your reply. I have attached schematic and register values of ADS1293. please check it out and update ASAP.

    Fullscreen ECG_register_details.txt Download 
    TI_ADS1293_SPIWriteReg(0x00, 0x00);
  TI_ADS1293_SPIWriteReg(0x01, 0x0A);
  TI_ADS1293_SPIWriteReg(0x02, 0x00);
  TI_ADS1293_SPIWriteReg(0x03, 0x00);
  TI_ADS1293_SPIWriteReg(0x04, 0x00);
  TI_ADS1293_SPIWriteReg(0x05, 0x00);
  TI_ADS1293_SPIWriteReg(0x06, 0x14); //0x04
  TI_ADS1293_SPIWriteReg(0x07, 0x3F); //0x3F
  TI_ADS1293_SPIWriteReg(0x08, 0x0F); //0xFF, 0x00
  TI_ADS1293_SPIWriteReg(0x09, 0x00);
  TI_ADS1293_SPIWriteReg(0x0A, 0x03);
  TI_ADS1293_SPIWriteReg(0x0B, 0x00);
  TI_ADS1293_SPIWriteReg(0x0C, 0x03);
  TI_ADS1293_SPIWriteReg(0x0D, 0x00);
  TI_ADS1293_SPIWriteReg(0x0E, 0x00);
  TI_ADS1293_SPIWriteReg(0x0F, 0x00);
  TI_ADS1293_SPIWriteReg(0x10, 0x00);
  TI_ADS1293_SPIWriteReg(0x11, 0x00);
  TI_ADS1293_SPIWriteReg(0x12, 0x04);
  TI_ADS1293_SPIWriteReg(0x13, 0x01);
  TI_ADS1293_SPIWriteReg(0x14, 0x36);
  TI_ADS1293_SPIWriteReg(0x15, 0x00);
  TI_ADS1293_SPIWriteReg(0x16, 0x00);
  TI_ADS1293_SPIWriteReg(0x17, 0x05);
  TI_ADS1293_SPIWriteReg(0x18, 0x00);
  TI_ADS1293_SPIWriteReg(0x19, 0x00);
  TI_ADS1293_SPIWriteReg(0x1A, 0x00);
  TI_ADS1293_SPIWriteReg(0x1B, 0x00);
  TI_ADS1293_SPIWriteReg(0x1C, 0x00);
  TI_ADS1293_SPIWriteReg(0x1D, 0x00);
  TI_ADS1293_SPIWriteReg(0x21, 0x02); //R2
  TI_ADS1293_SPIWriteReg(0x22, 0x04); //R3
  TI_ADS1293_SPIWriteReg(0x23, 0x02);
  TI_ADS1293_SPIWriteReg(0x24, 0x02);
  TI_ADS1293_SPIWriteReg(0x25, 0x00); //R1[4 Fixed for 102.4Khz]
  TI_ADS1293_SPIWriteReg(0x26, 0x00);
  TI_ADS1293_SPIWriteReg(0x27, 0x08);
  TI_ADS1293_SPIWriteReg(0x28, 0x00);
  TI_ADS1293_SPIWriteReg(0x29, 0x00);
  TI_ADS1293_SPIWriteReg(0x2A, 0x00);
  TI_ADS1293_SPIWriteReg(0x2B, 0x00);
  TI_ADS1293_SPIWriteReg(0x2C, 0x00);
  TI_ADS1293_SPIWriteReg(0x2D, 0x00);
  TI_ADS1293_SPIWriteReg(0x2E, 0x33);
  TI_ADS1293_SPIWriteReg(0x2F, 0x10);
  TI_ADS1293_SPIWriteReg(0x30, 0x00);
  TI_ADS1293_SPIWriteReg(0x31, 0x00);
  TI_ADS1293_SPIWriteReg(0x32, 0x00);
  TI_ADS1293_SPIWriteReg(0x33, 0x00);
  TI_ADS1293_SPIWriteReg(0x34, 0x00);
  TI_ADS1293_SPIWriteReg(0x35, 0x00);
  TI_ADS1293_SPIWriteReg(0x36, 0x00);
  TI_ADS1293_SPIWriteReg(0x37, 0x00);
  TI_ADS1293_SPIWriteReg(0x38, 0x00);
  TI_ADS1293_SPIWriteReg(0x39, 0x00);
  TI_ADS1293_SPIWriteReg(0x3A, 0x00);
  TI_ADS1293_SPIWriteReg(0x3B, 0x00);
  TI_ADS1293_SPIWriteReg(0x3C, 0x00);
  TI_ADS1293_SPIWriteReg(0x3D, 0x00);
  TI_ADS1293_SPIWriteReg(0x3E, 0x00);
  TI_ADS1293_SPIWriteReg(0x3F, 0x00);
  TI_ADS1293_SPIWriteReg(0x40, 0xFF);
  TI_ADS1293_SPIWriteReg(0x50, 0x00);
  TI_ADS1293_SPIWriteReg(0x60, 0x00);
  TI_ADS1293_SPIWriteReg(0x62, 0x00);

    Regards,

    Naga

  • 0 in reply to Nagaraj kumar kaliraj
    TI__Mastermind 38745 points
    Hello Naga,

    It looks from your register settings that you are only measuring ECG on channel 1 using IN1 and IN2. However, you have lead-off detection enabled for all the inputs. You should disable lead-off for all unused channels and inputs.

    Brian
  • 0 in reply to Brian Pisani
    Prodigy 30 points

    Hello Brain,

    Thanks for your reply. That I will disable with all other unused channels and inputs. but, Is this the reason for LOD is not working after sometimes? After replacing the chip it is working fine.

    Best Regards,

    Naga

  • 0 in reply to Nagaraj kumar kaliraj
    TI__Mastermind 38745 points
    Naga,

    It may take some time for the problem to manifest. What happens when the lead-off is not working and you power cycle the device? Does it still not work?

    Brian