When lightly loaded, that InA will pull within 7mV of ground and within 25mV to +Vs (5V in your case), which is quite good...

Be sure to read the "setting the gain" section of the DS. Ground the REF pin.

 

Ok, I tried out my prototype using AD627, I leave the pin5 empty (because I doesn't know what to add for REF). I follow the resistance value as you advice on the LTSpice. I get 4V for point A (V+) and 3.75V for point b (V-). Now my output keep maintain at 5V no matter what Rg value i add...what has gotten into this?

 

You can't ignore a pin connection just because you don't know what to do with it. Look at page 16 of the data sheet. REF is the reference voltage for the output (the output signal voltage is added to Vref). It should normally be be tied to circuit common.

 

ok, I grounded my pin5, and I get to achieve my DC output with respect to my sensor. But somehow it's still facing some fluctuation, is this because of the noise? Any necessary filter required?

 

Without knowing the nature of "some fluctuation", it's not possible to suggest good remedies.

 

guys, I done the circuit using AD627 along with the wheatstone bridge circuit. I adapting the signal using arduino ADC and display it on labview. But the signal output I get is fill with noises and very unstable even my sensor resistor value remain the same. Is this problem occur from the labview software or my circuit? bcuz i use multimeter to measure my circuit output it varies +- 0.1V only.