AD8333-output

Hello,

      I am implementing a bio-impedance measurement circuit using AD8333 and obtained the in-phase and quadrature output signals.My question here is that both these outputs (in terms of amplitude) always remain the same despite any changes made in the input parameters.Are they supposed to be this way?

     Going through the datasheet didn't help me either since there's no mention of interpreting the amplitudes of these signals.