TS5A9411: Usage outside Abs Max voltage ratings

Hi,

Does the Ts5A9411 in TINA's simulation also consider internal clamp diodes?
If not, what type of diode can I use in the simulation?

Thanks

Hi Robert,

What is your use case for which you need to design for a negative voltage on input/output pins? Depending on your system requirements, I may be able to recommend a different switch that has the powered-off protection feature.

Best regards,
Kate

Hi kate,

This is a multifunctional analogue input.
When used as dc voltage input (10Vdc) this switch connects a resistor to make an input voltage divider.
When used as RTD input (a current is injected) the switch remains open. (see draft)
The measurement should also be able to go to a negative voltage (about -2.5/-3Vdc). In this case the internal diode will start working.

Hi Robert, 

Thank you for providing the image. Please note that a negative voltage of -2.5Vdc to -3Vdc is outside of operation for which this device was rated in the Absolute Maximum Ratings table. 

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

I recommend looking for a switch with a dual power supply to support positive and negative input/output voltages. Another option to explore if you have flexibility with your power supply is TS5A22362. This is a single supply device that is capable of passing positive and negative input/output voltages in the range of VCC - 5.5V to VCC. 

Let me know what you think.

Best regards,
Kate