Other Parts Discussed in Thread: TIDA-00777, OPA2188, TPS65131, TEST, OPA2197
1、I use a signal generator to generate 50MV, 50HZ signal to the J2 input terminal of TIDA-00777.When I connect the positive signal to the PIN of J2 and the negative terminal to PIN2, the output signal is the correct amplification factor, but when I reverse the connection, the output signal is wrong, the signal is very small.Assume that the magnification is about 70 times。The first picture is the output waveform of the positive connection, and the second picture is the output waveform of the reverse connection. Why?
2、How large is the normal operating current of the OPA2188? I now use the TPS65131 which output ±15V to power 7channel OPA2188s, and I feel that the output current is not enough.