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tlv320aic23 sampling at 8 kHz passband attenuation

Sreelakshmi Radhakrishnan
Intellectual 315 points
Other Parts Discussed in Thread: AM1808

hi

I am using tlv320aic23 with am1808.

I have set f's ref at 48 kHz.

i am using a crystal  at 24.576 mhz and dividing it to achieve f's ref at 48 kHz.but when I set a dc sample rate at 8 kHz signal at 2khz and higher is getting attenuated and 3 db point is between 1   khz and 2 khz.for higher sample rates filter works fine.pleas help.u need a flat response upto 3.5 khz.thanks