LMV342 / Common mode input voltage range

Hello Ryuji,

The common mode voltages are referred to the V- pin. The datasheet assumes a single-supply, so V- = GND =0V.

So VICR(min)=0V means the lower input voltage is at 0V from V-, or V-, or GND. This is guaranteed at room temperature.

VICR(typ)= - 0.2V to 4.2V means the input voltage can go from 0.2V below V- to 0.8V below V+. This is a "typical" at room temperature and is not guaranteed. The upper limit will vary with temperature. The lower limit is limited by the ESD clamp diodes.

VICR(max) = 4.0V  means that the input voltage range is guaranteed up to 1V below V+.

So, with a 5V single supply, the input common mode range is guaranteed to be from 0V up to 4V at 25°C. But it "typically" can go -0.2 to 4.2V, but that range is not guaranteed.

We guarantee numbers in the Min and Max columns, and therefore they are "worst case" and guardbanded ("padded"). BOLD numbers are guaranteed over the specified temperature range and tend to be even "worse". 

Typical's are NOT guaranteed and are more "optimistic" as we do not have to add "safety" padding, so do not design to the typical numbers....they will eventually bite you.

Regards,