ADS8688: Second-order butterworth filter resistor value

Shu-Cheng LIN

Part Number: ADS8688

Hi Sirs,

We would like to know how to calculate the following second-order butterworth filter resistor value
Could you help share your experience for us?

Thanks!!

over 6 years ago

0 Evan Sawyer over 6 years ago

TI__Expert 3175 points

Hi Shu-Cheng,

We are looking into this and will get back to you.

0 Dale Li over 6 years ago in reply to Evan Sawyer

TI__Mastermind 35570 points

Hello Shu-Cheng,

FilterPro is a very good tool which can help you build a filter and determine resistor/capacitor value quickly according to your requirement to the filter, please go to this web link and Download FilterPro v3.1:

www.ti.com/.../filterpro&DCMP=hpa_amp_general&HQS=NotApplicable OT filterpro

Thanks for choosing TI SAR ADC.

Best regards

Dale

0 Shu-Cheng LIN over 6 years ago in reply to Dale Li

Guru 11785 points

Hi Sirs,

Thanks for your reply.

Could you share your experience that if we know public version reference schematic component values, how can we find the following parameters and frequencies??

0 Dale Li over 6 years ago in reply to Shu-Cheng LIN

TI__Mastermind 35570 points

Hi Shu-Cheng,

These parameters (Gain, frequency etc) are determined by your system design requirement, we have some good training materials&video on website, below is a video to explain a filter design and component selection:

http://www.ti.com/design-tools/signal-chain-design/webench-filters.html?keyMatch=filter&tisearch=Search-EN-Everything

Thanks&Regards

Dale

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ADS8688: Second-order butterworth filter resistor value