LTC1531CSW View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1531CSW' PDF : 12 Pages View PDF
LTC1531
TYPICAL APPLICATIONS
VTEMP
R2
10M
C2, 1µF
VCC
LT1490
VPW
+
VCC
ISOLATION
BARRIER
2.2µF
1
VCC
ZCDATA
SHDN
ZCPOS ZCNEG
10M
VCC
DATA
QD
VALID
10k
GND
LTC1531
10k
VTEMP OUTPUT = 0V TO VCC
= 0°C TO 200°C
RESOLUTION = 0.4mV OR 0.5°C
RESPONSE TIME CONSTANT = 10sec
VPW
2.5V
+
–
VREG
V1
Σ V2
V3
Σ V4
ISOGND
1
CMPOUT R1
1M
1 = ISOLATED GROUND
= EQUIPMENT GROUND
1M
0.1µF
R3, 10M
LT1495
LT1389
1
1.74M
10.2k
33k
THERM
30k
YSI44008
1.21k
11.8k
1
1
K
COLD JUNCTION COMPENSATES 0°C TO 60°C
C1
0.22µF
1
VPW
LT1495
UNUSED OP AMP
TIED FOR MIN
CURRENT DRAIN
1531 F11
1
Figure 11. Isolated Thermocouple Voltage
VTRIP
VPW
+
VCC
ISOLATION
BARRIER
2.2µF
1
VCC
ZCDATA
SHDN
ZCPOS ZCNEG
DATA
QD
VALID
GND
LTC1531
VPW
2.5V
+
–
ISOGND
1
VREG
V1
Σ V2
V3
Σ V4
CMPOUT
1M
0.1µF
10M
LT1495
LT1389
1
1.74M
10.2k
33k
THERM
30k
YSI44008
1.21k
11.8k
1
1
K
VPW
1
UNUSED OP AMP
LT1495
TIED FOR MIN
CURRENT DRAIN
1 = ISOLATED GROUND
= EQUIPMENT GROUND
COLD JUNCTION COMPENSATES 0°C TO 60°C
VTRIP SWITCHES AT 100°C, SET BY OP AMP GAIN
1531 F12
1
Figure 12. Over Temperature Detect
12
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