I have some issues about ADN8831. Our board has multi channels, using multi AN8831, and only one could not operate correctly.
I am using ADN8831, because the temperature measured is positive temperature coefficient, I configure the error OP as a follower, and other circuit follows the EVB.
After power on, measure voltage of PIN14 SS/SB, and it is always low(0.125V or 0.190V), the output of TECP and TECN also near zero. Vref voltage is normal, TEC voltage, Vvtec, Vitec are all normal. Condering all above, i suppose the chip gets into standby mode.
I wonder to knonw
（1） Is this status standby mode. if it is so, what other reasons could lead to getting into standby mode.
（2）what should i do to handle this problem.
（3）when i measure PIN 14 voltage, if i use the multi-meter PIN 13 first, and then measure PIN14, the voltage will drop from 3.3V to 0.2V. Is this normal
（4）I tried another chip which also has such problem, finding if i remove 0.1uF cap from PIN 14, the chip could heart but not cool. Is the chip damaged or anything else.
Other channels could work correctly, but i found the setting value of voltage-limit and current-limit, is not same as i measure. i wonder is this normal.