AN854 Datasheet, PDF (1/3 Pages) Silicon Laboratories – VERSATILE BUFFERED REFERENCE IC

AN854
VERSATILE BUFFERED REFERENCE IC
1. Introduction
In the analog arena, there are some ICs that are extremely versatile, with a number of tools built into one package.
The 555 timer comes to mind because it can be configured to perform an amazing range of tasks. As a result, it
has found its way into a great variety of end products. As of 2004, one billion were being manufactured every year,
making it probably the best-selling IC ever. The LM10 is another good example, as the idea of gain-block plus
reference in one package is definitely versatile.
To work with analog signals at super-low supply voltages, something other than a 555 or LM10 is necessary, as
these ICs either die out below 4.5 V or draw too much battery current (270 µA for the LM10). Silicon Labs’
TS12011 is used in the following circuits to generate some unusual reference voltages for applications where
battery current draw is critical. Like an LM10, it contains an op amp plus a reference and, additionally, a comparator
(unused in the circuits below).
Rev. 1.0 1/15
Figure 1. Buffered Reference Generators
Copyright © 2015 by Silicon Laboratories
AN854