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AD8235

Question asked by CharlieA on Feb 24, 2012
Latest reply on Feb 24, 2012 by CharlieA

Figure 44 of the AD8235 Data sheet shows the device paired with AD8609 in a hi-pass configuration with break at 0.3 Hz.  The AD8609 has very high voltage noise at this frequency.  Fundamental of Heart Beat is about 1 Hz with content to about 60 Hz.

 

As I am in the task of designing a mobile low power, single cell (Li-Ion), and hopefully very quiet EEG and EKG device, can anyone tell me why the AD8609 was selected rather than a very quiet amp like the AD4528?

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