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: ISO7340C
I am thinking to use TI digital isolator in my design. but I have some questions need to be clarified:
1. I know TI uses capacitor isolation architecture. is the frequency crossing the isolation capacitor fixed or variable? my application is sensitive to some frequencies. I would like to know if the noise could be problem.
2. some isolators, like RS485 transceiver, with power. Does the power supply use inductor inside? does it work in strong magnetic field?
Q. 1. I know TI uses capacitor isolation architecture. is the frequency crossing the isolation capacitor fixed or variable? my application is sensitive to some frequencies. I would like to know if the noise could be problem.
The PWM modulated communication is packetized. The packets repeat every 8us. The packet structure has a custom header and tail, and the body of the packet has the sampled low frequency information of all the channels. The smallest pulse width inside the PWM packet is ~20ns.
It is difficult to define a value for the carrier frequency for the PWM path.
This is a digital channel, and the filter performance or carrier leakage cannot be defined. We can however say the following:
1. Any transitions on the input pins (which are high frequency by definition) are conveyed to the outputs with a fixed propagation delay.
2. If the inputs are in a DC state (low frequency by definition), and the outputs happen to be in error, for example due to to excess noise or common mode transients beyond spec (not expected normally) the outputs will be corrected roughly wihtin 16us (this is the response time of the low frequency path).
Q. 2. some isolators, like RS485 transceiver, with power. Does the power supply use inductor inside? does it work in strong magnetic field?
A. The ISO7340C does not have a built in power supply. You must supply power externally. The ISOW7840 does have an internal isolated power supply if that is something you would like.
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 Lucas Schulte9:
In reply to Jeff zhang:
Is there anything else I can help with? If not, can you mark the thread as answered?
I haven't heard from you so I'm going to assume you received the information you needed. I'm going to mark this thread as resolved.
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.