INA217 is noisy

[urasinov]

I am developing intercom communication on INA217 and TDA2030.
I have troubles with INA217. It's noisy.
You can see cirtuit in attached pdf file.
My device has 2 XLR inputs for 2 microphones and 2 speakers. Only one mic and speaker is active.
I tested equalizer and TDA2030 in my circuit without INA217 it works fine.
So INA217 is problem.
Power supply is 24V I also tested with two 9V batteries (18V total) again I heard noise in speaker. It means it's not power supply problem.
I use in my device CD4053 switch. Instead it I try to solder wire jumpers but again it's noisy.
Anybody saw same problem with INA217?
Thank in advance!

https://www.dropbox.com/s/44s1yvs2btylrrt/PTT_intercom_20120707.pdf

 

[DF96]

Circuit diagram too small to read, but unexpected noise is often a sign of RF oscillation.

 

[urasinov]

Please download pdf file I guess in browser it's small. It should be good.
I heard white noise. Loudness of noise is same as my voice.
How to remove RF oscillation? Inductor on input? When inputs are shorted output noise doesn't fade.
I am hardware engineer. But usually I develp digital circuits.

 

[DF96]

Have you read the datasheet? It warns about RF oscillation under certain circumstances.

 

[urasinov]

Do you mean 47Ohm resistor and 1.2uH inductor?
Yes I saw it but I think it's not my case.
I connected together positive and negative inputs for test.
But I also hear noise when inputs are shorted by short wire.