8

LT1025

1025fb

TYPICAL APPLICATIO S

10mV/

°C

0

°C TO 500°C

R5

47k

R1

1k

1%

R7

15k

R3

141k

1%

R2

100

Ω

R4

141k

C1

0.1

µF

GND

LT1025

–15V

–

–

+

+

15V

6V

15V

–15V

R6

10k

TYPE E

1

µF

*SEE “REVERSING THE POLARITY OF THE 10mV/

°C OUTPUT”

LTKA0x

††

–10mV/

°C

Utilizing Negative LT1025 Drive to Accommodate Grounded Thermocouple*

R6

7.5k

1%

R7

500

FULL-SCALE

TRIM

5V**

V

–

V

–

V

+

GND

LT1025

R9

100k

R5

3k

–

+

TYPE K

†

–15V

–

+

LTKA0x

††

10mV/

°C

10mV/

°C

C1*

C2*

R3

1M

0.1%

R1

10k

0.1%

R2

10k

0.1%

R4

1M

0.1%

R8

5k

1%

=

(V

*C1 AND C2 FILTER RIPPLE AND NOISE, BUT WILL LIMIT AC COMMON-MODE REJECTION

IF NOT MATCHED. SUGGESTED VALUES ARE 0.001

µF TO 0.1µF

**USE LOWEST POSSIBLE SUPPLY VOLTAGE TO MINIMIZE INTERNAL TEMPERATURE RISE

Ω

Differential Thermocouple Amplifier