Hello.
I am new in pcb design except of student years.
I am trying to connect AD620 Instrumentation amplifier.
Below please the circuit design, which I made in real word using breadboard, AD620, and a controller to generate analog signals.
According to AD620 datasheet, Gain = [(49.4 kOm / R(gain) ) + 1]. Thus, in case of R(gain) = 14.7 kOm, the Gain of the AD620 should be 4.36.
PARTS PROPERTIES
R1 = R2 = 21.7 kOm
R (gain) = 14.7 kOm
V1 = 5V
V2 = I change the values from controller's GUI
MEASUREMENTS RESULTS (M2 Voltmeter).
V2 = 0.2 V - - - - - M2 = -2.115V
V2 = 0.5 V - - - - - M2 = -2.115V
V2 = 0.8 V - - - - - M2 = -2.099V
V2 = 1 V - - - - - M2 = -2.012V
As you can see there are incorrect results.
Please, help me to understand what is incorrect.
Thanks.
I am new in pcb design except of student years.
I am trying to connect AD620 Instrumentation amplifier.
Below please the circuit design, which I made in real word using breadboard, AD620, and a controller to generate analog signals.
According to AD620 datasheet, Gain = [(49.4 kOm / R(gain) ) + 1]. Thus, in case of R(gain) = 14.7 kOm, the Gain of the AD620 should be 4.36.
PARTS PROPERTIES
R1 = R2 = 21.7 kOm
R (gain) = 14.7 kOm
V1 = 5V
V2 = I change the values from controller's GUI
MEASUREMENTS RESULTS (M2 Voltmeter).
V2 = 0.2 V - - - - - M2 = -2.115V
V2 = 0.5 V - - - - - M2 = -2.115V
V2 = 0.8 V - - - - - M2 = -2.099V
V2 = 1 V - - - - - M2 = -2.012V
As you can see there are incorrect results.
Please, help me to understand what is incorrect.
Thanks.