39

LTC2485

2485fa

SCL

SDA

6

7

10

18

17

16

15

14

13

12

11

28

27

26

25

24

23

22

21

7

6

5

4

3

2

5V

LTC2485

REF

3

ISOTHERMAL

2

C7

0.1

µF

C8

1

µF

C6

0.1

µF

4

R2

2k

5

TYPE K

THERMOCOUPLE

JACK

(OMEGA MPJ-K-F)

5V

5V

3

8

9

GND

CA1

RC7

RC6

RC5

RC4

RC3

RC2

RC1

RC0

RB7

RB6

RB5

RB4

RB3

RB2

RB1

RB0

RA5

RA4

RA3

RA2

RA1

RA0

OSC1

OSC2

MCLR

20

9

10

1

5V

5V

Y1

6MHz

R1

10k

D1

BAT54

9

2485 F45

19

PIC16F73

D7

D6

D5

D4

EN

RW

RS

R5

10k

R4

10k

R3

10k

R6

5k

2

1

3

2

1

5V

CALIBRATE

CONTRAST

GND D0

D1 D2 D3

2

× 16 CHARACTER

LCD DISPLAY

(OPTREX DMC162488

OR SIMILAR)

DOWN

UP

1.7k

1.7k

TYPICAL APPLICATIO

Figure 45. Complete Type K Thermocouple Meter

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.