Tool/software:
Hello
This Q relates to a string where Vivian had suggested limiting the voltage @ Ain to 4.5 V.
Ain has a operating range of 0.6V to 4.5 V and an Abs Max rating of 5V.
It has a 200 uA Current source driven from Vdd , 18 V in my case.
1. I naturally assumed a 5 V zener clamp should be mandatory.
However, after going thru' the DS, on page 30, I see this:
:" When AIN is floating, the AIN voltage is 5 V "
I would assume that such a 5 V clamp is internal.
Can some expert confirm this point?
2. If that be true, I can directly connect a NTC 10K @ 25*C, Beta as 3984
without any Series resistor; which was the topic of our last discussion
3. The internal current source of 200 uA is specified at Ain of 2.5 V
It's variation from 0.6V to 3.5 V I could not locate anywhere.
Can some one help>
Thanks to all TI experts who support with exemplary speed and accuracy.
Best
Varun
