This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: OPA172
our client design opa172 as attached, but wavefrom was something wrong.
have any suggstion, if any question.
Please advise me.
TI Designs – Precision: Verified DesignSingle-Supply, Electret Microphone Pre-AmplifierReference Design
Lawrence, Assuming headphone is a 32 ohm load. there will be more voltage loss across R70 and C73. Xc=1/(6.28*2.2uF*1kHz)= 72 ohms. Headphone voltage will be 3Vpp * 32 ohms / ( 32 ohms + 50 ohms + 72i ohms) 3Vpp * 32 ohms / ( 82 ohms + 72i ohms) 3Vpp * 32 ohms / sqrt ( 82^2+ 72^2) ohms 0.88Vpp ; this is close to actual green signal, so problem identified.
Regards,Ronald MichallickLinear Applications
TI assumes no liability for applications assistance or customer product design. Customer is fully responsible for all design decisions and engineering with regard to its products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning Customer's design. If Customer desires engineering services, the Customer should rely on its retained employees and consultants and/or procure engineering services from a licensed professional engineer (LPE).
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
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. 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.