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[Ask] AD8232 Input Impedance for IEC60601-2-47

Question asked by kris.huang@avnet.com on Jan 4, 2016
Latest reply on Jan 29, 2016 by krisf

Sir,

My customer got problem when testing input impedance of AD8232.

 

Test condition:

Follow IEC60601-2-47 , see in attach file

 

The ECG test module generate 10Hz/5mV signal to device input.

And output can't be lower 94% (4.7mV).

Currently we got 4.1mV.  (AD8232 output = 820mV , GAIN=200) 

 

Do you have any suggestion in this issue?

We try to short Switch S1 and the we got around 4.9mV.

But in normal test, the S1 should OPEN.

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