Part Number: INA240-Q1
The in the absolute value table in the datasheet, this IC is capable of handling -6V, and +90V steady state common mode voltage. We have a test condition where the ~200 microsecond transient will reach -9.1V and I’d like to understand the effect on this IC. Are there diode clamps inside the IC for -6V and +90V? Thank you
You’re correct, the diode clamps restrict the input common mode range: -6V to +90V.
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 Guang Zhou:
Thank you for your reply. If the transient pulse (~200 micro sec) will reach -9.1V (-3.1V below -6V), in your opinion
will this IC survive? I now there's no guarantee and understand this will exceed absolute rating.
I believe these ICs have internal 3k resistors at the input pins possibly limiting the transient current.
In reply to Vitaliy Mosesov:
Internal to the device, there are no current limiting resistors. The 3K you mentioned are not in the path of ESD diodes. Between the -9.1V external voltage and ground are the ESD diode and parasitic trace resistance only.
200uS is a long time; probably enough to cause damage to the device even if this is a one-time occurrence.
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.