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PGA309 + TPS7A41 under electrically fast transient test

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Hello

    our pressure transmitter are mainly formed by your PGA309 programmable conditioner and power supply chip TPS7A41. in order to pass electrically fast transient test, we add some ferrite beads and TVS etc. see attached file below.

    but the voltage output changes about from 1V to 2V even to 3V when the applied voltage reaches 3kV.after the test, the voltage output returns to 1V and no components are damaged.

our aim is 4kV,could you give me some advices?

best regards

Weiming

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