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Digital Anti-Aliasing Filter

I want to buy a digital anti-aliasing filter with following specifications:
1) Digitally controlled cutoff frequency from 10kHz to 100kHz.
2) Real-time response.
3) 100dB reduction in power in a span of 2 times cutoff frequency.

I want to use it for the following application:
I am using data acquisition board at 500K Samples per seconds and I want to analyze frequencies in between 100Hz to 50KHz. I want to remove all higher frequency very efficiently using anti-aliasing filter before data acquisition step. This is important because I want to profile underwater noise. Therefore, I want to remove signals above 100Khz completely. 

I want to use this digital filter before using data acquisition board.
If you can suggest better external digital anti-aliasing filter specifications (and product name) than it would be of great help for me.

Thank you.

  • Amartansh,


    I'm sorry that we didn't get to this question immediately, but I'm not aware of any stand-alone products like this. You may be able to program something like this with a microprocessor, but it's not something that we do in the Data Converter Forum.


    Joseph Wu