LT1025MJ8 Linear Technology, LT1025MJ8 Datasheet - Page 9

• Manufacturer Part Number: LT1025MJ8
• Manufacturer: Linear Technology

Specifications of LT1025MJ8

• Operating Temperature Classification: Military
• Operating Temperature (max): 125C
• Rad Hardened: No
• Lead Free Status / RoHS Status: Not Compliant

TYPICAL APPLICATIO S
GND
LT1025
V
V
** TRIM R2 FOR V
IN
+
* TRIM R5 FOR V
†
Type S Thermocouple Amplifier with Ultralow Offset and Drift
THIS AMPLIFIER HAS A DELIBERATE OFFSET TO ALLOW OUTPUT SLOPE (10mV/ C) TO BE SET
INDEPENDENTLY FROM AN ARBITRARY HIGH TEMPERATURE CENTER POINT (1000 C). THIS IS
REQUIRED BECAUSE THE SLOPE OF TYPE “S” THERMOCOUPLES VARIES RAPIDLY WITH
TEMPERATURE, INCREASING FROM 6 V/ C AT 25 C to 11 V/ C AT 1000 C. NONLINEARITY LIMITS
ACCURACY TO 3 C OVER THE 800 C TO 1200 C RANGE EVEN WITH OFFSET CORRECTION
R
–
R,S
V
O
U
–
TYPE S
750k
R7
OUT
OUT
+
–15V
= 1.669V AT V
= 9.998V AT T = 1000 C, OR FOR V
12k
R6
1 F
1%
R1
1k
LT1009
IN
2.5V
1.37M
= 0.000mV (+INPUT OF AMPLIFIER GROUNDED)
FULL-SCALE
1%
R4
100
TRIM
R2**
R5*
10k
OFFSET
TRIM
0.1 F
2
5
3
R4
2.7k
IN
–
+
LT1052
1
AT +INPUT OF AMPLIFIER = 9.585mV
0.1 F
909k
1%
R3
15V
V
V
+
–
7
4
8
6
0.1 F
V
10mV/ C
800 C TO 1200 C
OUT
LT1025 • TA06
†
LT1025
1025fb
9