AD636JCHIP データシートの表示（PDF） - Analog Devices

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AD636JCHIP

Low Level, True RMS-to-DC Converter

Analog Devices 

AD636

D1

1N4148

R5

C4 +

47k⍀

2.2␮F –

1W R6

200mV

10% 1M⍀

VIN

1

ABSOLUTE

14

R1

9M⍀

C3

0.02␮F

VALUE

2 AD636

13

2V

3

SQUARER

12

R2

900k⍀

–

4

DIVIDER

11

20V

R3

90k⍀

6.8␮F +

5

CURRENT

10

MIRROR

R4

10k⍀

200V

COM

R7

20k⍀

D4

1N4148

6

+

9

10k⍀

7

B– UF

8

10k⍀

+

C7

6.8␮F

+VS

R8

D2

2.49k⍀ 1N4148

R9

100k⍀

0dB SET

R11

10k⍀

R10

20k⍀

D3

1.2V

AD589

R12

1k⍀

R13

500⍀

LIN

dB

R14

10k⍀

dB

SCALE

LIN

LIN

SCALE

dB

R15

1M⍀

C6

LIN

0.01␮F

+VDD

3-1/2 DIGIT

7106 TYPE

A/D

CONVERTER

REF HI

REF LO

COM

HI

ANALOG

IN

+VDD

+ ON

1␮F

OFF

–VSS –

+

9V

BATTERY

3-1/2

DIGIT

LCD

DISPLAY

dB

LO

–VS –VSS

LXD 7543

Figure 14. A Portable, High Z Input, RMS DPM and dB Meter Circuit

D1

1N6263

C1 +

3.3␮F

R1

ON/OFF

1M⍀

1

ABSOLUTE

14

+4.4 VOLTS

+

–

C2

6.8␮F +

VALUE

2 AD636

R2

13

12.7k⍀

+1.2 VOLTS

+ C3

R4

9 VOLT

SCALE FACTOR

ADJUST

SIGNAL

INPUT

3

4

SQUARER

12

DIVIDER

11

10␮F

+

R3

5k⍀

AD589J

500k⍀

IREF

ADJUST

R5

10k⍀

C4

0.1␮F

250␮A

5

CURRENT

10

*R7

100␮A

2k⍀

+

–

MIRROR

R6

R8

47k⍀

1 WATT

6

+

100⍀

9 + C5

10k⍀

10␮F

C6

0.1␮F

–

0–50␮A

␮A776

D2

1N6263

R9

10k⍀

7

BUF

–

10k⍀

8

R10

20k⍀

+

R11

820k⍀

5%

+4.7 VOLTS

ALL RESISTORS 1/4 WATT 1% METAL FILM UNLESS OTHERWISE STATED EXCEPT

*WHICH IS 2k⍀ +3500ppm 1% TC RESISTOR.

Figure 15. A Low Power, High Input Impedance dB Meter

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

D Package (TO-116)

0.005 (0.13) MIN

0.098 (2.49) MAX

14

8

0.310 (7.87)

0.220 (5.59)

1

7

0.200 (5.08)

MAX

0.200 (5.08)

0.125 (3.18)

PIN 1

0.785 (19.94) MAX

0.060 (1.52)

0.015 (0.38)

0.150

(3.81)

MAX

0.023 (0.58)

0.014 (0.36)

0.100 0.070 (1.78) SEATING

(2.54) 0.030 (0.76) PLANE

BSC

0.320 (8.13)

0.290 (7.37)

0.015 (0.38)

0.008 (0.20)

H Package (TO-100)

0.185 (4.70)

0.165 (4.19)

0.040 (1.02) MAX

0.045 (1.14)

0.010 (0.25)

REFERENCE PLANE

0.750 (19.05)

0.500 (12.70)

0.250 (6.35) MIN

0.050 (1.27) MAX

0.160 (4.06)

0.110 (2.79)

6

5

0.115

(2.92)

4

BSC

3

2

0.019 (0.48)

0.016 (0.41)

0.230 (5.84)

BSC

0.021 (0.53)

0.016 (0.41)

7

8

9

0.045 (1.14)

0.027 (0.69)

10

1

0.034 (0.86)

0.027 (0.69)

36° BSC

BASE & SEATING PLANE

–8–

REV. B

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