Other Parts Discussed in Thread: TIDA-01486,
I used EVM430-FR6043+TIDA-01486 for water flow application. Gain 5 was set on driver stage and gain 1 on receiving stage. I tested on J3 pin2 (yellow) and J4 pin8 or J3 pin8 (blue) of TIDA-01486 using oscilloscope. The results are shown as:
Until now, everything seemed normal. Since the receiving voltage was small, I changed the gain on receiving stage to 5V/V. Then some oscillation was introduced in the circuit. I tested the voltages on J3 pin2 (yellow) and J4 pin8(blue) with or without transducers, as shown:
I tried other recommended GAIN options. Only 1 V/V worked normally.
What happened when I added some GAIN to the receiving stage with transducers? Could you help me to modify the circuit to get more GAIN without introducing oscillation?