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CLARIFICATION REQUIRED - VCC signal used in Hardware Pace Detect Circuit

Bhairu Patil1
Intellectual 570 points
Other Parts Discussed in Thread: ADS1298, ADS1198

Dear all,

              I am referring to Hardware Pace Using Slope Detection circuitry by Tony Calabria(ECG Pace Board.Sch) given on following link..

http://www.ti.com/lit/df/tidr195/tidr195.pdf

              I am not getting why 5V  supply used for VCC signal  in  Hardware Pace Using Slope Detection circuitry while the ADS119x/ADS1298 works with 3V. 

    5V supply requirement for VCC signal is given in 2744.Hardware Pace Det Summary ppt file document & this file i have attached,PFA. Please reply me ASAP.

Thanks in advance.

Regards,

Bhairu

2744.Hardware Pace Det Summary.pptx
  • 0
    TI__Guru 57306 points

    Hi Bhairu, 

    The ADS1198/1298 can operate with an analog supply between 2.7V and 5.25V. The relevant external components used in Tony's Hardware Pace Detection circuit also have various supply ranges. 5V was a common supply voltage that all the devices could share. It is not necessary for the ADS1198/1298 to use the same supply.

    Please refer to each device's specification datasheet for more information on their supply and input voltage ranges.

    Best Regards,

  • 0 in reply to Ryan Andrews
    Intellectual 570 points

    Hello Ryan Andrews,

                             Thank you very much for reply. For Hardware Pace Detection circuit I have planned to use 3V supply. Is there any schematic changes required in Hardware Pace Detection circuit. Please reply me ASAP.

     

    Regards,

    Bhairu