2022-08-14 09:56 PM
2022-08-15 12:23 AM
Welcome, @SHorv.1, to the community!
A multimeter in the resistance measuring range is rarely a suitable instrument to test the function of a component, instead you should test the components in a real circuit.
Is it a reliable source where you bought these devices?
There are a lot of counterfeit chips nowadays. What gives you the conviction that they are original?
Regards
/Peter
2022-08-15 03:16 PM
Hi Peter, Thank's for the response, I purchased the TDA7297 chips directly from ST and were supplied from Mouser. I tried on 3 occasions in a circuit and each time nothing so out of frustration checked the cheap Chinese TDA7297 chips with the Multimeter and was getting a reading, then tried with the ST supplied chips and no readings at all.
Regards Steve Horvath.
2022-08-16 05:26 AM
OK, so it looks like these devices are genuine.
What does that mean exactly: "they do not work"?
What does your application circuit look like, what are the environmental conditions of the TDA7297 (supply voltage, load resistance, input signal etc.)?
Regards
/Peter