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msp430afe221: Programmable Gain Amplifier Characteristics

Abhinav Jain
Prodigy 70 points
Part Number: MSP430AFE221

I am thinking of measuring ECG signals using MSP430afe2xx series. I tried to look for more details about the differential PGA is has, however I was unable to find any info on it.

1) Can someone help in share more about the PGA (whether it is low-noise, etc).

2) Is there a possibility (even remote) to use it measure ECG or other bioimpedence signals?

Thanks ,

  • 0
    TI__Guru 56685 points
    Hello Abhinav,

    If you look at section SD24_A Performance in the datasheet, currently page 29, you will find some information about the possible error different gain levels will give you. You will also find the different input ranges for each gain setting int he section above it, SD24_A Input Range .
  • 0 in reply to Jace H
    Prodigy 70 points

    Hi Jace,

    Thanks. It did include some of technical specs, however I was unable to locate clear noise related data (http://www.ti.com/lit/ds/symlink/msp430afe221.pdf

  • 0 in reply to Abhinav Jain
    TI__Guru 56685 points

    Hello Abhinav,

    Some of that information is contained within the offset error and CMRR spec at different gain levels. For this device, the PGA is integrated as part of the SD16 and thus every spec is in terms of the SD16. Some of our other devices have Op-amps that are not as integrated that may have additional specs you want and still meet your application needs. Also, some of our newer devices that still have this integration have more specs int his regards as well.

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