User's Manual

Construction of Optical Unit
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RMT LtdRMT Ltd
DX6106
One can see that the temperature measurement accu-
racy depends directly on . So the voltage on
the pin must be stable.
U
REF
+5VIN
X1/2
÷
÷
ø
ö
ç
ç
è
æ
+
=
RR
R
UU
TL
L
REFTR
The output signal from thermistor scheme depends on
its resistance as :
5
4
3
2
1
0
–40 –20 0 20 40
Temperature, °C
Output, V
60 80
Fig. 3.24. Thermistor circuit output vs measured temperature
(3.2)
With the help of equations (3.1) and (3.2) we obtain the
plot in Fig. 3.24.
3-21