/ltz1000-info

A collection of what I've learned about the LTZ1000

LTZ1000 info

A collection of what I've learned about the LTZ1000, mostly from the epic thread on the EEVBlog forum: Ultra Precision Reference LTZ1000.

Relative importance of R1-R5

From the datasheet:

Here's the same data, but stated as "relative impact":

That is, if R1 changes in value, 1% of that change will show up on the output voltage (if R1 changes by 100ppm, the output voltage will change by 1ppm).

However, members of the community have measured different results:

Here's the same data, but expressed as the importance of each resistor relative to the importance of the R4/R5 ratio (i.e. the data is normalized against R4/R5). E.g. according to zlymex, drift in R1 is only 15% as important as the drift in R4/R5.

So, spend your money on R4/R5 first, then R2, then R1, then R3.

References:

Note: the above data does not pertain to circuits which feature the "R60" resistor.

Circuits from the community

A circuit from a CERN presentation: