Hi,
We have an application wherein Log112 is used.Supply for the same is +15V(pin6) and -15V(pin 9). To test the healthiness of circuit, we do the following tests.
Test 1
1.Connect equal resistance of 3.09M between pins 8 & 1(I1) and pins 8 & 14(I2)
2.Measure output at pin5
3.Output shall be 0V since equal current is fed to pins 1 and 14.
In our case, we are getting a voltage of 4.5V instead of 0V.
Test 2
1.Connect resistance of 30.9M between pins 8 & 1(I1) and 3.09 M pins 8 & 14(I2)
2.Measure output at pin5
3.Output shall be 0.5V
In our case, we are getting a voltage of 8.2V instead of 0.5V.
Any idea why this is happening? Thanks in advance for your time.
Regards,
Jayaram C B