Hello,
I'm trying to design the input stage for an EMG amplifier. I'm using an INA118 with a split supply (5 V for V+ and 2.5 V for V-). I've used two DC sources but in the actual circuit I will probably use a rail splitter.
I've tried to simulate the circuit in TINA-TI but the output is wrong. The input is a 5mVpp sine wave with the INA amp gain of 10 and a DC level of 1 V (This is so it exceeds the common mode requirement of 0.98 V). The output appears to be garbage.
So there's obviously something I don't understand, or am missing. There are many parameters to take into account and the sheer number of graphs are overwhelming. If someone can point me in the right direction, it would be good.
I'm trying to design the input stage for an EMG amplifier. I'm using an INA118 with a split supply (5 V for V+ and 2.5 V for V-). I've used two DC sources but in the actual circuit I will probably use a rail splitter.
I've tried to simulate the circuit in TINA-TI but the output is wrong. The input is a 5mVpp sine wave with the INA amp gain of 10 and a DC level of 1 V (This is so it exceeds the common mode requirement of 0.98 V). The output appears to be garbage.
So there's obviously something I don't understand, or am missing. There are many parameters to take into account and the sheer number of graphs are overwhelming. If someone can point me in the right direction, it would be good.