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: OPA2348
Our customer has question about OPA2348.
I attach the circuit below with simplified.
Two OPA2348 are tested in same circuit.
Device A : 100mV at Probe_X and 100mV at Probe_Y.
Device B : Nearly 0V in both Probe point.
OPA2348 offers voltage output swing from fail in electrical characteristics.
(25mV when RL=100K, A >94dB and 125mV when RL=5K, A > 90dB)
Should this voltage appear at output when the input is not applied?
In this time, Device A and B show different result.
Could it be possible result?
The customer uses OPA2348 for current sensing, so they want to avoid such variation because it leads to measurement error.
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.
In reply to Paul Goedeke:
In reply to na na78:
Hi Paul Thank you for your reply. So, in the following two cases, I added my understanding. Could you please review? Device A : 100mV at Probe_X and 100mV at Probe_Y. -> If the offset voltage of two opamp are called Vos1 and Vos2 conveniently, Vos1 at first stage opamp is increase with gain of 44 and it appears at second stage opamp. Basically, we can not say that Vos1 and Vos2 are equal. Device B : Nearly 0V in both Probe point. -> In this case, it can be considered that Vos1 x 44 is smaller than output swing limit (VEE+25mV). It can be considered that ~25mV (or output swing limit) appear at output. Is my understanding correct? BestRegards
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.