I keep running into ESD ratings in datasheets but I have no idea what they mean, for example in LM385 datasheet it says:
What does this mean for an electronic engineer or a hobbyist like me? can someone help me understand these points please:
- What is the normal and maximum human body static voltages and what cause it to increase?
- What does the value 500V mean? is it safe to touch it with hand for example?
- How can I tell what's my ESD voltage at a given time?
Best Answer
There really isn't a normal maximum, its dependent on the triboelectric charging between the materials your wearing (the source of the charge) and any discharge path (humidity in the air also makes a difference). See this article
That means it was tested to 500V, which mainly concerts input terminals of the device that would be connected to the 'outside' world by a cable or something the user of a device could touch. The human body model is: "this standard is intended to simulate a person becoming charged and discharging from a bare finger to ground through the circuit under test." it involves a set capacitance and resistance and a standardized test setup.
If you want electronics to survive then get a proper ESD setup. There are numerous articles on this site and the internet that describe what is acceptable for hobbyists. An ESD mat and a wriststrap would be a good start.
You could build or buy an electrometer and measure your potential between you and ground.