HI7106 데이터 시트보기 (PDF) - Intersil

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HI7106

3½ Digit, LCD/LED Display, A/D Converter

Intersil 

HI7106

Typical Applications (Continued)

OSC 1 40

OSC 2 39

TO PIN 1

100kΩ

OSC 3 38

TEST 37

REF HI 36

100pF

SCALE

FACTOR

ADJUST

REF LO 35

CREF

34

0.1µF

CREF 33

COMMON 32

100kΩ 1MΩ

100kΩ 220kΩ

22kΩ

IN HI 31

IN LO 30

A-Z 29

BUFF 28

INT 27

V - 26

0.01µF

ZERO

ADJUST

0.47µF

47kΩ

SILICON NPN

MPS 3704 OR

SIMILAR

9V

0.22µF

G2 25

C3 24

A3 23

TO DISPLAY

G3 22

BP 21

TO BACKPLANE

NOTE: A silicon diode-connected transistor has a temperature coef-

ficient of about -2mV/oC. Calibration is achieved by placing the sens-

ing transistor in ice water and adjusting the zeroing potentiometer for

a 000.0 reading. The sensor should then be placed in boiling water

and the scale-factor potentiometer adjusted for a 100.0 reading.

V+

TO LOGIC

VCC

O /RANGE

U /RANGE

CD4023 OR

74C10

CD4077

1 V+

2 D1

3 C1

4 B1

5 A1

6 F1

7 G1

8 E1

9 D2

10 C2

11 B2

12 A2

13 F2

14 E2

15 D3

16 B3

17 F3

18 E3

19 AB4

20 POL

OSC 1 40

OSC 2 39

OSC 3 38

TEST 37

REF HI 36

REF LO

CREF

CREF

35 TO

34 LOGIC

GND

33

COMMON 32

IN HI 31

IN LO 30

A-Z 29

BUFF 28

INT 27

V- 26 V-

G2 25

C3 24

A3 23

G3 22

BP 21

FIGURE 10. HI7106 USED AS A DIGITAL CENTIGRADE

THERMOMETER

FIGURE 11. CIRCUIT FOR DEVELOPING UNDERRANGE AND

OVERRANGE SIGNAL FROM HI7106 OUTPUTS

OSC 1 40

OSC 2 39

OSC 3 38

TEST 37

REF HI 36

REF LO 35

CREF 34

CREF 33

COMMON 32

IN HI 31

IN LO 30

A-Z 29

BUFF 28

INT 27

V - 26

G2 25

C3 24

A3 23

G3 22

BP 21

TO PIN 1

100kΩ

100pF

10µF

1kΩ

0.1µF

22kΩ

0.47µF

47kΩ

0.22µF

10µF

TO DISPLAY

TO BACKPLANE

SCALE FACTOR ADJUST

(VREF = 100mV FOR AC TO RMS)

470kΩ

1N914

CA3140

5µF

+

-

100kΩ

2.2MΩ

1µF

10kΩ

4.3kΩ

1µF 10kΩ 1µF

0.22µF

+

9V

100pF

-

(FOR OPTIMUM BANDWIDTH)

NOTE: Test is used as a common-mode reference level to ensure compatibility with most op amps.

FIGURE 12. AC TO DC CONVERTER WITH HI7106

AC IN

9

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