Part Number: TIPD138
In the design of low pass filter value is 1.5 MHz, I want to ask why is 1.5 MHz rather than other values, the value is calculated according to what condition.
Hello, I did not personally design TIPD138, but, it appears to me that the selection of 1.5MHz was a relatively arbitrarily selected frequency for the cutoff of this filter. As far as performance of the components used in the design there is no particular component that is contributing a different noise profile above 1.5MHz, I would say they're just reducing the broadband noise. The only guiding factor perhaps considered is that most analog components PSRR starts to fall off pretty dramatically above 100kHz so maybe they wanted to reduce this noise.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.