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1298
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  • Forum Post: Re: I am having trouble with a anlog to digital converter ads1256 where should I post my code and question?

    josh wojnas
    I am working on the ads1298 now ... it is such a interesting replacement for that chip & sections of the design for a EEG / EMG system. Opendous I am working with has a schematic using it on the free kicad software and board designed that is 2 layor.
    on Apr 19, 2010

  • Forum Post: Opendous & I have a open source ads1298 design board & schematic if some engineers can look into the schematic and board and make some sugjestions the open source design should bring a lot of interest.

    josh wojnas
    Opendous & I have a open source ads1298 design board & schematic if some engineers can look into the schematic and board and make some sugjestions the open source design should bring a lot of interest. http://code.google.com/p/opendous/source/browse/trunk/Current_Designs/ADS1298/ADS1298_2Layer_Test...
    on Apr 29, 2010

  • Forum Post: Re: VREF Problem with ADS1298ECGFE-PDK

    Benjamin Tan
    I reviewed the Spec and noticed that my jumper was not in the correction position for JP24. Changed it and that fixed everything. Not sure how that happened though. I would have expected all the jumpers to be in the correct position from the vendor but I guess that's why they have manuals. ...
    on Aug 20, 2010

  • Forum Post: ADS1298 DVDD pins question

    Xiang Liu
    Hi, I am Xiang Liu. We plan to use an FPGA 3.3V I/O pins to control ADS1298. And the question is: to make the logical levels compatible, if DVDD pins of ADS1298 could be connected to 3.3V power supply (though the suggested power supply is 1.8V or 3.0V in the datasheet)?. Thanks!
    on Aug 23, 2010

  • Forum Post: problem with ads1298 8th channel

    Gean Francesco Derosso Chu
    Hi, I've made a simple msp430F2132 software to aquire data from the ads1298 ecg fe board. The 7 first channels are working fine, but the 8th channel present some problems. When I shut down the 8th channels, instead of sending only 0, the channel sends data like 2 0 0, 1 80 0 , 3 80 0, 4 0 0...
    on Feb 23, 2011

  • Forum Post: problem about power up sequence

    bowen jing
    hi i have a question about the power-up sequence.it is written on the datasheet that "Before device power-up, all digital and analog inputs must be low."i want know why . if i don't follow this practise,what gonna happen and whether it will cause any damage to the ads1298. thanks
    on May 11, 2011

  • Forum Post: ADS1298 ECG FE Rev. A Daughtercard Mechanical Drawing

    JohnMoore
    Hello TI Friends, I am trying to find a mechanical drawing of the relative spacing of headers J2, J3 and J4 on the ADS1298 ECG FE (Rev. A) daughtercard. I have designed a testing motherboard with an EVM interface similar to that of the MMB0 but I want to determine the exact header spacing before I...
    on Jul 5, 2011

  • Forum Post: Re: ADS1298 dynamic range of differential input

    Jan Knezik
    Hi Kaspars, thank you very much for your reply. I guess the op-amp in the middle is driving DRL (Driven Right Leg) and the aplifiers for each line (INP, INN) are ordinary low noise and drift operation amplifiers. Together with the PGA inside ADS1298 it makes one instrumentation amplifier...
    on Jul 26, 2011

  • Forum Post: ADS1298 dynamic range of differential input

    Jan Knezik
    Hello, I have a few questions about diferential input of ADS1298 circuit. On page 26 of the datasheet there is formula (3) that dynamic range equals 2Vref / Gain. Does it mean that for 4V reference and Gain = 1 I can have total dynamic range of 8V? If it is true what way should I connect input pre...
    on Jul 26, 2011

  • Forum Post: ADS1298 open source design help request & this will assist open source and development & interest in the chip

    josh wojnas
    ADS1298 open source design help request & this will assist open source and development & interest in the chip. The board and schematic uses open source software. Sugjestions and bug and possible bug posts or other information would be greatly helpful. http://code.google.com/p/opendous...
    on Apr 29, 2010

  • Forum Post: ADS1298 RLD lead-off detection

    Carlo Nenna
    Dear all, I'm trying to understand how to obtain the status of the RLD with ADS1298. Reading through the datasheet my undertanding is that bit0 of Config3 register should provide the status of RLD, but it's not clear to me what shall be done to obtain a reliable information from that bit...
    on Jul 27, 2011

  • Forum Post: ADS1298 Configuration for EEG

    Sean Greevers
    Hi, I am working on a project and trying to set the configuration for an ADS1298 to be used in an EEG device. Specifically, I am looking to capture beta wave activity. I am using a PIC 16F1933 to configure the ADS through SPI. I have a few questions: Is it possible to configure the ADS1298 to...
    on Dec 8, 2011

  • Forum Post: ADS1294/ADS1298 in rdatac mode suddenly stops converting!

    Michael Schreittmiller
    Hi everyone, I really hope someone can help me with this issue here. I'm using the ADS1294 for continuous conversion of ECG data. Configuration of the device and starting conversion works fine. However, after a while, the ASIC suddenly stops converting without any observable reason. SPI communication...
    on Dec 9, 2011

  • Forum Post: ADS1298 Noise Shaping

    dpryan
    I don't understand the "Modulator Noise Spectrum" figure in the ADS1298 datasheet (Fig 29). It says it's showing Normalized Frequency, but what was the frequency normalized by? Usually "normalized" frequencies are unitless, but it says the units are Hz and the x-axis shows...
    on Jan 19, 2012

  • Forum Post: ADS1298 arbitrary pins

    Paul Lozovyy96060
    Hello TI, I have purchased ADS1298 ECG FE rev A few months ago and it has been working great with ECG patient tests. But now I want to use it for accelerometer for motion artifact detection. For filtering, ECG signal and accelerometer data needs to be recorded at the same time and cannot have a large...
    on Feb 7, 2012

  • Forum Post: Re: Prosthesis Using ADS1298

    ali mirza
    Sir, I have learned through the data sheet that the SCLK needs to be synchronized with the micro-controller, inorder to recieve and send data. Is that right? and i need to to connect my DRDY to interrupt. Thus deciding when to receive and when to send data. And my serial pin to DIN.Now the problems...
    on Feb 21, 2012

  • Forum Post: Prosthesis Using ADS1298

    ali mirza
    Sir, Last year a friend of mine was working on a prosthetic limb with the help of ads1298. I am continuing the project as he could not finish it. I have read his post and all his research work. I have some questions regarding the ic. The problems am facing are: 1. How can i interface using SPI. I...
    on Feb 20, 2012

  • Forum Post: ADS 1298 SPI Interface with AVR

    ali mirza
    Sir I have been trying to communicate between ADS 1298 and AVR. I am facing alot of problems on that. Please guide me what to do. I am still working on the prosthetic limb, if You remember. The problems I was facing were : 1. What SCLK should i use if I was using 12MHz clock with AVR, using...
    on Mar 27, 2012

  • Forum Post: RE: ads1298 Lead-Off Detection

    Yan Jia-hong
    I got the Application Report SBAA196. I follow the figure 2 to connect electrodes. I want to get the results like figure 9. Can I get the same cure if I put the different positions for the RLD pin? How do I set the registers?
    on May 17, 2012

  • Forum Post: RE: Using the ADS1298 to measure electrode resistance

    Yan Jia-hong
    HI: what time is I can order the ADS1299??
    on May 30, 2012

  • Forum Post: RE: Using the ADS1298 to measure electrode resistance

    Yan Jia-hong
    hi: I read the Understanding Lead-Off Detection in ECG.PDF , but how do a similar function to (Please visit the site to view this file) the appendix. i can design Impedance-Meter to the ads1298 DC Lead-Off Detection m easurement Impedance about It can be used for one channel operation (three electrodes...
    on May 31, 2012

  • Forum Post: Using the ADS1298 to measure electrode resistance

    Quentin Davis
    I want to use the lead-off detection feature of the ADS1298 to measure the electrode resistance. I have tried a few things, but everything has errors on the order of 10 kohm, and I was hoping there is a better way. I'm using the eval board, ADS1298 ECG FE Rev A. For all the experiments below...
    on Feb 17, 2011

  • Forum Post: ADS1298 EVAL kit

    Jon Taylor
    Hi, We have a TI ADS1298 Eval kit and are trying to get the 60Hz FIR filter function to work, but the trace shows no change in the 60 Hz content whether the filter is enabled or not. Sample rate is 500SPS. (pg 37 of the users guide) Is there anything else I need to do to make the filter functional...
    on May 24, 2012

  • Forum Post: Write Registers in the ADS1298

    Jeisson Quiroz G��mez
    I'm using 3-channels of the ADS1298 (CH1, CH2 and CH3), below I attached the file which I wrote, please tell me if I am in the correct. The code is written for the microcontroller PSoC5 and I'm working on RDATAC mode. However, my question is about the opcode of the WREG command . The first...
    on Jul 13, 2012

  • Forum Post: ADS1298 Channel 2 data read

    Andrew Cook
    Hi, I've been using the ADS1298 ECG FE connected via SPI to my own processor (LPC1768). I have been able to connect my ecg simulator to channel 1 using JP33. I'm now trying to use the D15 connector which from my understanding means I now need to use Channel 2 (JP32), however I've been...
    on Jul 28, 2012
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