Other Parts Discussed in Thread: TPD2E007
I am working on a design that includes the circuit as shown in the schematic here and am seeking guidance on both the choice and placement of TVS ICs which may include the TVS1400. The device includes a 12V rail which supplies 12V to 32 of these circuits, for simplicity i've only shown one here. I am interested in protecting the device from ESD and lightning but am not clear on where I should place TVS and which TVS to utilize.
If I understand things correctly
1. an ESD/lightning event occurring at A will flow towards the 12V source, here that would be from left to right, because that is path of least impedence.
2. an ESD/lightning event occurring at B will flow toward the op-amp only if R1+R2 > 9K ohms otherwise it will flow toward the 12V source
If I am correct above then I should place a TVS device at both A & B correct? Is there any need to place a TVS device at C?