ADPD105: Band-Pass Filter Corner Frequencies

ohoilett on Jun 5, 2017

Hi,

The ADPD105 datasheet mentions that there is an internal band-pass filter in the analog block, but makes no mention of the corner frequencies of the filter (or maybe I overlooked that information). Would someone inform me of the characteristics of the band-pass filter?

Thank you.

0 ADIApproved

on Jun 5, 2017 5:26 PM over 4 years ago
Hello,

The bandpass filter corners are at 100kHz and 390kHz.

Regards,

Kevin
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0 ohoilett on Jun 6, 2017 8:27 AM over 4 years ago

Hi Kevin,

Thank you for your response. What is the significance of those corner frequencies (or how where they chosen)? I'm trying to back-calculate the corners frequencies based on LED pulse-width, pulse-frequency, etc. but can't quite figure out why 100kHz and 390kHz are significant.

Thanks.
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0 ADIApproved

on Jun 6, 2017 5:35 PM over 4 years ago
Hello,

The corner frequencies were chosen to optimize for the 2us and 3us LED pulse widths.

Regards,

Kevin
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0 ohoilett on Jun 6, 2017 9:22 PM over 4 years ago

Awesome. Thanks.
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