ADS1198 Hardware Pace Detection Circuit

Athira Menon

Other Parts Discussed in Thread: ADS1298, ADS1198

Hi all,

We have implemented the hardware pace detection circuitry as given in the TI website in our board. The board has Vcc=3V. The circuit was simulated and tested out in TINA and was found to be working perfectly.

The issue that we are facing now is too much noise in the differentiator output waveform (roughly 200mV). What are possible suggestions for reducing the noise that we are seeing?

Regards,

Athira

over 10 years ago

0 Joseph Wu over 10 years ago

TI__Guru* 97835 points

Athira,

What part does this refer to? Is this for the ADS1298?

Joseph Wu

0 Athira Menon over 10 years ago in reply to Joseph Wu

Prodigy 120 points

Joseph,

This refers to the ADS1198.

Athira

0 Ryan Andrews over 10 years ago in reply to Athira Menon

TI__Guru 66446 points

Hi Athira,

It is difficult to know from the image alone what could be introducing so much noise. Would you mind sharing your schematic and TINA simulation? You can send them to me in a private message if you'd like.

In your scope capture, is that a negative PACE pulse at -240ms? It looks to be about -200mV in amplitude. As long as you can distinguish between the noise and the PACE pulse, the circuit should work.

Best Regards,

Data converters

Data converters forum

ADS1198 Hardware Pace Detection Circuit