Hello!
I have two amp chips, TDA1517 and TDA7266S. With reference datasheet design they behave differently in terms of interference. TDA1517 produces a 'quiet' output without noticeable interference, while TDA7266S produces a lot of interference, including low freq hum and radio interference. What is the cause of this and is there a way to fix it by adding a few capacitors/resistors to the reference design? Thanks!
I have two amp chips, TDA1517 and TDA7266S. With reference datasheet design they behave differently in terms of interference. TDA1517 produces a 'quiet' output without noticeable interference, while TDA7266S produces a lot of interference, including low freq hum and radio interference. What is the cause of this and is there a way to fix it by adding a few capacitors/resistors to the reference design? Thanks!
If you attach a photo it will help to solve your problem.
But typical solution of that is using a shielded input cable and installing 1-10 kOhm resistors between IN1, IN2 and S-GND.
But typical solution of that is using a shielded input cable and installing 1-10 kOhm resistors between IN1, IN2 and S-GND.
Include a lowpass RC filter before the input coupling capacitor.. something like 1K and 220pF should do for starters.
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