Hi Expert,
If the V+ and V- voltage is fast than V+, does it possible damage the LMV7272? Thanks!
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hello Jerry,
I'm not quite sure of the question.
Are you asking that if the V+ is brought up before V-, will it cause damage?
Or,
Are you asking if the inputs are brought up before V+, will it cause damage?
Regards,
Hi Jerry,
The inputs are protected by ESD diodes to the supplies, as shown below:
If the inputs are higher than V+ (>500mV), the upper diodes will conduct and clamp to V+.
The clamp current must be limited to less than 10mA (in Abs Max table). I would recommend 1mA or less.
The current can be limited by adding a series resistance of a minimum of 1k Ohm per volt of over-voltage (or 5k minimum for 5V). This resistance can be part of any input voltage divider network.
If this event is long-duration (>100ms) or occur as part of normal operation, external Shottky clamping diodes are recommended to take the stress off the internal ESD cells.
Regards,