Other Parts Discussed in Thread: DRV135, , LSF0108, SN65HVD82, SN74CBTD3384
Hi Everyone,
I use SN74LVC16T245DGGR to translate voltage level between MCU (3.3V) and RS485 transceiver (5V). Aditional, MCU generates audio tone then it is convert to balance audio by means the DRV135UA. DRV135UA use an isolated power supply +/-15VDC.
I have a hum at the DRV135UA output pins. I checked each ICs and found that SN74LVC16T245DGGR generate noise when is placed in PCB.
SN74LVC16T245DGGR have bypass capacitors on power supplies but I don´t know why produce noise on isolated power supply.
Could someone help me?