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Complete ECG front end


on Thu 15 of April, 2010 03:03 CEST, by blackhat
Hi there, has anybody played around with this yet? My sample arrives tomorrow.

Texas Instruments
Complete Analog Front End for ECG/EEG

The eight-channel, 24-bit ADS1298 is the first in a family of fully integrated analog front ends (AFEs) for patient monitoring, portable and high-end electrocardiogram (ECG) and electroencephalogram (EEG).

Simplifies design by integrating all common features required for ECG and EEG front ends, using up to 95 percent fewer components for significant board-space savings.

Eight low-noise PGAs.
Eight high-resolution, simultaneous sampling ADCs.
Integrated amplifier for right-leg drive.
Integrated amplifiers for Wilson Central Terminal (WCT) and Goldberger Central Terminals (GCT).
Digital pace detection capability.
Continuous lead-off detection.
Onboard oscillator and reference for smaller footprint and low-power applications.
Power consumption of 1 mW/channel results in up to 95 percent less power use than discrete implementations, increasing equipment portability and improving patient mobility.

4 µVpp (typical) input-referred noise is far superior to the limits set in IEC60601-2-27/51 for more accurate measurements in portable equipment and high channel-density, high-end range ECG and EEG equipment.

Succeeding four- and six-channel versions and 16-bit versions offers designers a migration path to varying resolutions and channel combinations for low-noise medical instrumentation. Examples include patient monitoring, rest and stress ECG, fetal monitoring, hospital and public access AEDs, as well as sports and fitness monitors.


http://www.ti.com/ww/en/analog/ads1298/index.shtml (external link)
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Re: Re: Re: Complete ECG front end

on Thu 03 of June, 2010 21:14 CEST, by mshieh
I would wait for the TQFP version to come out before anything is actually put into production since those parts are easy enough to solder by hand.
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Re: Complete ECG front end

on Tue 01 of June, 2010 13:50 CEST, by Adoran
> Hi there, has anybody played around with this yet? My sample arrives tomorrow.

Cheers for bringing this chip to my attention. I'm going to have a good look at how much a whole rig (this analog front end plus the DSP and processing) plus get an idea of how I'm going to program the thing. Texas Instruments seems to roll a version of Eclipse as its Code Composer Studio (v4) SDK.

I have found the following diagram that Texas Instruments do very informative:
http://focus.ti.com/docs/solution/folders/print/464.html?DCMP=hpa_ads1298_campaign&HQS=NotApplicable+PR+ecg-pr (external link)
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Re: Re: Complete ECG front end

on Sun 23 of May, 2010 13:28 CEST, by HaiderIftikhar
> I've looked at either that or something else TI had. Board and evaluation kit were ~ $350, so I didn't buy one. How much did this cost?



post:

Actually the evaluation board for Ads1298 is worth 200 dollars approx but it has a few thingsd short of what the literature provides because the ADS1298 is still a prototype and has not come into production yet
however since they need testing and we are ready for testing that makes us their excellent collaborators. regarding the stencil layout for PCB designing of this IC we would require help from the TI's website that has the particular modeling methods.
another thing can be that the EVM or the evaluation model for this ic can be used directly becauseit even has a small lcd embeded on the board for viewing the leads one by one
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Re: Re: Complete ECG front end

on Wed 21 of April, 2010 04:22 CEST, by blackhat
> Out of interest... how are you going to align and mount the chip since the samples that are currently available come in the New Fine Pitch Ball Grid Array package? Will a stencil and reflow skillet even work at this fine of a level?

Good question.


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Re: Complete ECG front end

on Tue 20 of April, 2010 09:48 CEST, by mshieh
Out of interest... how are you going to align and mount the chip since the samples that are currently available come in the New Fine Pitch Ball Grid Array package? Will a stencil and reflow skillet even work at this fine of a level?
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Re: Complete ECG front end

on Fri 16 of April, 2010 20:47 CEST, by blackhat
The ADS1298 sample was free. Still looking into how much the parts for the rest of the device would be.

> Hi there, has anybody played around with this yet? My sample arrives tomorrow.
>
>
Texas Instruments
> Complete Analog Front End for ECG/EEG
>
> The eight-channel, 24-bit ADS1298 is the first in a family of fully integrated analog front ends (AFEs) for patient monitoring, portable and high-end electrocardiogram (ECG) and electroencephalogram (EEG).
>
> Simplifies design by integrating all common features required for ECG and EEG front ends, using up to 95 percent fewer components for significant board-space savings.
>
> Eight low-noise PGAs.
> Eight high-resolution, simultaneous sampling ADCs.
> Integrated amplifier for right-leg drive.
> Integrated amplifiers for Wilson Central Terminal (WCT) and Goldberger Central Terminals (GCT).
> Digital pace detection capability.
> Continuous lead-off detection.
> Onboard oscillator and reference for smaller footprint and low-power applications.
> Power consumption of 1 mW/channel results in up to 95 percent less power use than discrete implementations, increasing equipment portability and improving patient mobility.
>
> 4 µVpp (typical) input-referred noise is far superior to the limits set in IEC60601-2-27/51 for more accurate measurements in portable equipment and high channel-density, high-end range ECG and EEG equipment.
>
> Succeeding four- and six-channel versions and 16-bit versions offers designers a migration path to varying resolutions and channel combinations for low-noise medical instrumentation. Examples include patient monitoring, rest and stress ECG, fetal monitoring, hospital and public access AEDs, as well as sports and fitness monitors.
>

>
> http://www.ti.com/ww/en/analog/ads1298/index.shtml (external link)
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Re: Complete ECG front end

on Fri 16 of April, 2010 14:27 CEST, by jonricmd
I've looked at either that or something else TI had. Board and evaluation kit were ~ $350, so I didn't buy one. How much did this cost?
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