The instrumentation amplifier in this picture is of the OPERATIONAL AMPLIFIER-type. Upon delivery, op amp ic is packaged in a Strip case. The number of terminations approaches 6. Buffer amplifier has a total of 6 pins on it. This linear amplifier should be powered by an 2.7V battery.
MAX4336EXT+T Features
6 Pins supply voltage of 2.7V
MAX4336EXT+T Applications
There are a lot of Maxim Integrated MAX4336EXT+T Instrumentational OP Amps applications.