Hi,
I need to measure 2 rails, 12-36V (say upto 50V) with a 3v micro
hence plan to use a (dual) OPAMP, like circuit here
Looking at the TI website, seems the TLV9002 is 0.6uV/C, and lowest cost $0.09/1Ku
please confirm this is indeed the best option, running from 0 to 3.3V supply, lowest drift, small package, low cost.
and will work as per the circuit provided.
tks, Rob
Hi Rob,
Given the requirements (Small size, Low offset drift, Low cost, Dual amp) TLV9002 is likely the best option.
This circuit will work well with the TLV9002.
DDF is the smallest package option at the $0.09/1Ku price point. RUG or YCK come at a higher cost, but are significantly smaller package size:
Please let me know if you have any questions.
Best,
Jacob
Hey Rob,
YCK is a relatively unique package, so this would be somewhat limited in terms of P2P compatibility with other manufacturers.
TLV9002IDDFR is less unique a package, and produced by other manufacturers (to my knowledge). Still however, this package is not necessarily a guarantee from other manufacturers.
One of the best solutions to this problem is to implement a dual footprint in layout, allowing different packages to be installed in the same footprint.
See this article by Tim Claycomb covering how this can be accomplished: Dual Footprint Article
DDF is the same pitch as VSSOP(DGK), making the dual footprint effectively a slightly larger version of the VSSOP footprint: 
DGK is a very common package offered by almost all amplifier manufacturers
A disadvantage of this implementation is that layout gets a bit larger, and assembly requires slightly more care.
DSG package is also used across the industry and relatively small.
Please let me know if you have any questions.
Best,
Jacob
