question about ecg

hello

i search of course
about circuits, i found circuits use ad620 & ad624
so if u know which is better ?

iam asking so that i can find one who do ecg circuit before & it was working properly
thanks

muhammadfekry_2010,

The general specs on both are similar.

The AD620 is smaller (8-pin) and cheaper $5-$10US at Digikey
The AD624 is larger (16-pin) more expensive $30-$50US at Digikey
The AD624 has pin-selectable precision gain, but since absolute amplitude accuracy is not very important in ECG, I don't think this much needed.

I have not used either one, so that is just my take from the datasheets.

Ken

well i used both in my circuit and i found the AD624 is easier to handle and u do not need more component