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AD595 Thermocouple Amplifer Input Overvoltage Protection

Question asked by Iain.M on Aug 14, 2012
Latest reply on Jun 21, 2013 by ScottH

I wish to include input overvoltage protection for the AD595.

 

Does the AD595 incorporate input protection / ESD protection diodes or resistors?

What is the limit for input current for an over voltage condition?

 

Are there any Analog Devices tutorials / tech notes (similar MT-036 and MT-069) which discuss input overvoltage protection for the AD595.

 

I have also observed that the alarm output transistor is switched on if a common mode voltage of approx 12.5 V (within the max. spec for the part) is applied to the thermocouple inputs (AD595 supplies set to +/- 15V). Is this a known characteristic?

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