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ECG circuit development

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saurabh17g

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I am planning to use INA 333 opamp for amplifying the low voltages(in microvolts) given out by sensors. But as my device is battery operated, i am unable to provide +(7 pin) and -(4 pin) voltages. I want to operate my circuit in a single supply mode instead of dual supply. As specified in website INA 333 is single supply opamp but it dint work. Will anybody help me in debugging this problem.

Also, if anybody has any document about internals of opamp(which is a differential opamp) to get to know about the equations and other details, please give me the links.
 
The circuit is going into a body of a person. So, things should be done at minimum power consumption and battery requirement.
 
Or an opamp buffer with a voltage-divider to establish a driven virtual common.

ken
 
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