Omega Vehicle Security 450 - Manual (Page 10)

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Section 2 Operation
2.1 Principles of Operation
The temperature indicator uses two ICs to digitize
and display the analog input signal.
One IC performs the conversion of the analog
input to the digital equivalent via 24 bit delta-
sigma analog to digital converter. Battery voltage
is also monitored by this IC and a thermistor
supplies the reference junction correction signal.
The other IC receives input from the analog
to digital converter, linearizes and drives the
LCD display. Front panel buttons are also
monitored.