Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 46 subscribers
  • Views 5124 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS1298 Defibrillator Protection Circuit

FrankXu
Genius 3500 points
Other Parts Discussed in Thread: ADS1298

I'm using ADS1298 in our ECG design.

I have gone through all the posts about "Defibrillator Protection Circuit" in the forum. The post and answers in

e2e.ti.com/.../882080

helps me a lot, but I still have some questions.

In TI's application report SPRAB36B, the front end schematic use this defibrillator protection circuit:

1. In the situaltion of ECG Defibrillator Protection, the neon lamp and the TVS diodes, which is better?

    Can I use a TVS diodes to replace the DS1 in the schematic?

    Althrough TVS has much small current limit than neon lamp, but I think in the case of 8kV, the current is only 8k/22k=0.36A. While the TVS has a much faster transient speed than neon lamp. So I think TVS is better than neon lamp in this case.

2. The SPRAB36B says R2 should>1W. What about the R3? Can I use a 1/8W resistor?

thanks