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Forum Post: RE: Are ADS1118's inputs tolerant to signals above VDD?

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[quote user="Bob Benjamin"]5.5V is the maximum voltage that can be applied to the device before damage will occur.  This is a process limitation.  The ESD cells are slightly different between the analog and digital input pins.  You will note that the analog input pins has the VDD+0.3V maximum requirement.  Also note that this does not mean that you can apply up to 5.8V if the VDD supply is 5.5V.  Any input beyond 5.5V will damage the device.[/quote]

Well is there any functional difference between ESD diodes & clamping didoes? Because if I assume both same then common mode Vin(Max) of 10V with series resistor of 1Kohm limiting continuous current of 10mA is supposed to work.

In case I need additional protection for thermocouple measurement with ADS1118 what will be your suggestion ?

How ADS1120 is different for this protection?

Regards,

Nilesh


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