Hi all
I am planning using the audio codec of TPS 65950 for interfacing audio with OMAP 3530.
I am planning to use the main mic/sub mic of TPS 65950 for capturing audio input from analog microphone.The TRM of TPS 65950 says there is an analog anti aliasing filter in the path from mic/sub mic to ADC of the codec.But I couldn't find detailed information in the TRM or Detailed Design.
1.Pls tell me what are the specifications of the analog AA filter like the cut off frequency.And whether they are programmable
2. The Register settings for ALC requires lower and upper thresholds of the ALC in dB.
But what is the reference for the gain in dB.ie Is it with reference to maximum input voltage that can be given to ADC ? ie Does a max
gain threshold -9 dB imply the output of ALC will be -9 dB from full
scale ADC output?
3. Is there a noise gate in the ALC ( for not amplifying inputs below a
threshold)
