67
The CA3193 is an excellent choice for use 和
thermocouples. In Figure 11, the CA3193 amplifies 这
generatedsignal500时间.Thethree22M
Ω
resistors将
providefull-scaleoutputifthethermocoupleopens.
figure11. THECA3193USEDINATHERMOCOUPLECIRCUIT
TypicalApplications
(持续)
+15V
22M
2
3
1
5
4
7
6
20K
20K
1K
CA3193
22M 22M
10K
10K
1K
499K
8.2k
2K
0-1ma
0.1
µ
F
THERMOCOUPLE
+
-
V+
-15v
allresistorsare1%.
allresistorsareinohms.
V
输出
TypicalPerformanceCurves
figure12. TYPICALINPUTOFFSETVOLTAGE
TEMPERATURECHARACTERISTIC
figure13. INPUTOFFSETVOLTAGEvsTIME
400
300
200
100
0
-50 0 50 100 150
temperature(
o
c)
ca3193(0
o
Cto70
o
c)
ca3193a(-25
o
Cto85
o
c)
inputoffsetvoltage(
µ
v)
300
200
100
0
0 500 1000 1500
TIMEATAMBIENTTEMPERATURE=125
o
c(小时)
EQUIVALENTTIMEATTEMPERATURE=25
o
c(日)
0 385 770 1155
inputoffsetvoltage(
µ
v)
CA3193
CA3193A
ca3193,ca3193a