LTC1042_09 datasheet(6/8 Pages) LINER

Part #	LTC1042

Description	Window Comparator

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC1042

1042fa

APPLICATIO S I FOR ATIO

LTC1042 • A104

R4

THERMOCOUPLE TYPE

232k

301k

2.1M

J

K

T

S

1k

TTL SUPPLY

V+

5V

3

2

1

4

8

6

7

0.1

µF

0.1

µF

RF**

CF*

RI*

VT

RF

RI

1+

VT

R3**

R2**

R1**

TEMPERATURE

IN WINDOW

TEMPERATURE

HIGH

100k

±5%

187

Ω

1690

Ω

LT1034-1.2

36k

±5%

COLD JUNCTION COMPENSATOR

R4

1/2 LTC1043

5k AT 25

°C†

1820

Ω

0.0047

µF

1

µF1µF

LTC1052N8

8

7

14

13

12

11

16

17

4

8

7

6

5

1

2

3

4

LTC1042

+

–

†

VCENTER =

1.235 • (R2 + R3)

R1 + R2 + R3

WIDTH = 2 •

1.235 • R3

R1 + R2 + R3

YELLOW SPRINGS INST. CO. P/N 44007

CHOOSE CF TO FILTER NOISE

CHOOSE RF, RI, R1, R2 AND R3 TO SET WINDOW

ALL RESISTORS

±1% UNLESS OTHERWISE NOTED

**

*

()

Single 5V Thermocouple Over Temperature Alarm

TTL Power Supply Monitor

ALL RESISTORS ± 5% UNLESS OTHERWISE NOTED

SUPPLY TOLERANCE EQUALS R2 IN kΩ. I.E., 10k = ±10%

R2*

10k

100k

ABOVE RANGE

(V

+ > 5.5V)

“HI” =

SUPPLY IN

RANGE

(4.5 < V+ < 5.5)

“HI” =

LTC1042 • AI03

V+

8

7

6

5

1

2

3

4

LTC1042

25k

LT1004-2.5

10k

± 0.25%

10k

± 0.25%

100k

TTL SUPPLY

V+

*

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LTC1042 Datasheet(PDF) 6 Page - Linear Technology

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