Hi, I'm looking for to use the ADS1293 for an ECG application. ADS1293 has an EMI filter, so only RF noise is filtered. However, there is any protection against defribillation discharge. I wonder which is the best recommendation by TI in order to protect the device. I've looked for 5V TSV supressors, but I saw that, in general, TSV with a max. working voltage of 5V has its max. breakdownd voltage around 7.5V. ADS1293 datasheet has a maximun rating of 6V for the analog operation. I wonder too if it's necessary to include an Oamp buffer separator on each input between the device and the ECG input connector.
I wonder if the schematic attached is well right or it must be modified.
This could be the complete input protection circuit. This include the discharge gas tube and a bidirectional TVS for defibrillator discharge and a separator opamp buffer in order to protect the ADS1293inputs. The example is for one single input lead, so it's necessary to repeat this circuit for all the leads.
I wonder if it is necessary to include or not, or at least a part of this circuit at each one of the inputs of the ADS1293.
please, could you enlight me about this topic ???
best regards, Esteban
