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Original question:

PCM1863: How fast does the audio bandwidth on the main ADCs roll off?

PCM1863: Frequency response at 96/192kHz frame rate.

Adam Lock
Intellectual 255 points
Part Number: PCM1863

What is the frequency response at 96kHz and 192kHz frame rates?

I need to know -3dB point before considering for a new design, and the data sheet only references a response out to 20kHz.

  • 0
    TI__Mastermind 23050 points

    Hi Adam,

    Figure 19 shows the FFT at a 192kHz sample rate and an effective 60kHz bandwidth. The decimation filter passband is 0.454*fs so this ends at 43.5kHz for the 96kHz fs case. Is this for an ultrasonic application? What bandwidth are you looking to achieve?

    Best,

    Zak