ECG circuit development

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.

Is there a reason you can not use 2 batteries in series to create the dual supply ?

The circuit is going into a body of a person. So, things should be done at minimum power consumption and battery requirement.

saurabh17g said:

The circuit is going into a body of a person. So, things should be done at minimum power consumption and battery requirement.

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Into! Sounds so full of fail.

consider using a voltage divider? I am using it for my ECg circuit at the moment. Works pretty fine.

Or an opamp buffer with a voltage-divider to establish a driven virtual common.

ken