Maximum "vout" of current monitor.

[treez]

Hello,
This concerns single supply operation of LT1787 as in figure 8, page 12 of the datasheet.
The LT1787 current monitor, on page 3 of its datasheet quotes "vout" as "v(bias) + 1.024V" if "Vs+ > 3.3V".

Why does "Vs+" have to be greater than 3.3V?

Surley LT1787 can produce vout = v(bias) + 1.204V if "VS+" = 2.5v?
(assuming v(bias) = 0V.

Further down the page on page 3, "VOmax" is stated as VS+ -0.75v.

So why are they saying that "vs+" has to be greater than 3.3V for "vout" to be 1.024V?
Surely if "Vs+" is just 2.5v, then "vout" could be 1.024V ?

LT1787 DATASHEET:
http://cds.linear.com/docs/en/datasheet/1787fc.pdf

 

[ads-ee]

your looking at the testing information. That's what the vendor guarantees how the part will perform.

Look further to the application information they have suggested circuits on how to use their part.