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AD8233 Fast Recovery Fuction

Question asked by HOD on Mar 23, 2018
Latest reply on Apr 2, 2018 by Emman.A

Hi

 

I have a question AD8233

About the fast recovery function possessed by AD8233

In the current design, the primary filter is designed and the circuit configuration is the same as in Figure 75 in the data sheet.

In this case, set the FR pin to "H" to enable the fast recovery function.

Then, S1 and S2 in Fig. 1 (right figure) are turned ON, it is an understanding that rapid charge to the external capacitor, the filter stability becomes faster.

[Question]
1. Although the SW terminal is not connected, understanding that it may be in the released state is correct, is not it? I am concerned that the noise due to ON / OFF of the internal S2 does not affect the measured waveform.

2. Even if the SW terminal is not connected, it is understood that S1 (SW between IAOUR and HPSENSE) works if "FR = H", is it correct?

 

 

 

 

Best Regards

HOD

 

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