LM6142, LM6144
SNOS726D –JUNE 2000–REVISED MARCH 2013
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Figure 41.
The gain is set by the ratio of R2/R1 and R3 should equal R1 and R4 equal R2. Making R4 slightly smaller than
R2 and adding a trim pot equal to twice the difference between R2 and R4 will allow the CMR to be adjusted for
optimum.
With both rail to rail input and output ranges, the inputs and outputs are only limited by the supply voltages.
Remember that even with rail-to-rail output, the output can not swing past the supplies so the combined common
mode voltage plus the signal should not be greater than the supplies or limiting will occur.
SPICE MACROMODEL
A
SPICE macromodel of this and many other Texas Instruments op amps is available
http://www.ti.com/ww/en/analog/webench/index.shtml?DCMP=hpa_sva_webench&HQS=webench-bb.
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