LTC201A/LTC202/LTC203

11

201a23fb

Micropower Thermocouple Temperature to Frequency Converter

APPLICATIO S I FOR ATIO

GND

GND

S2

S1

S3

S4

NC

IN3

IN2

IN1

IN4

D3

D2

D4

D1

11

16

3

13

12

6

5

1

9

8

14

4

15

10

7

2

6V

6.8

µF

0.02

µF

LTC203

100k

100k

100

°C 1.5kΩ

TRIM

10k

240k

6.81k

Ω**

1M

LT1049

LT1004-1.2V

LT1025

300pF

100pF

LT201_202_203 • AI14

390pF*

6V

6V

6V

74C14

6V

6V

0.47

µF

2N3906

2N3904

C1

C2

C4

C3

Q2

Q1

NC

“A”

OUTPUT

0

°C to 100°C

D.C. to 1kHz

R–

K

TYPE K

THERMOCOUPLE

NOTES:

POLYSTYRENE

IRC/TRW MTR/5/+ 120ppm

360

µA OPERATING CURRENT

4.75V TO 10V SUPPLY VOLTAGE

FOR 4mV FULL SCALE “GENERAL PURPOSE”

V

→ F DELETE LT1025 AND THERMOCOUPLE

AND DRIVE POINT “A”

*

**