AD568

REV. A

–13–

16

15

13

16

15

14

24

23

22

21

20

19

18

17

12

11

10

9

8

1

2

3

4

7

6

5

AD568

+15V

REFCOM

–15V

ACOM

LCOM

SPAN

SPAN

THCOM

VTH

DIGITAL

INPUTS

0.2µF

0.1µF

0.1µF

0.1µF

–15V

+15V

ANALOG

GND PLANE

DIGITAL

GND PLANE

DIGITAL

SUPPLY

GROUND

100pF

1k

Ω

+5V

NC

NC

ANALOG

OUTPUT

ANALOG

SUPPLY

GROUND

4

3

10

12

6

5

100pF

3000pF

75

Ω

1µF

1µF

20k

Ω

AD841

2k

Ω

1k

Ω

500

Ω

13

14

1

2

3

4

5

6

7

8

9

10

11

12

AD568

W1

Z1

CH1

OUTPUT

BASE

COMMON

Z2

W2

CH2

OUTPUT

11

CONTROL

HF

COMP

CH1

INPUT

INPUT

COMMON

OUTPUT

COMMON

CH2

INPUT

75

Ω

10

Ω

10

Ω

+9V

–9V

200

Ω

GAIN

ADJUST

(

±4% RANGE)

10

7

1

14

–9V

AD5539N

8

100k

180

Ω

470

Ω

2.7

Ω

0.47µF

–9V

50k

(OPTIONAL)

OUTPUT

OFFSET

–9V

+9V

+9V

0.47µF

2.7

Ω

3

D1

180

Ω

0.25pF –

1.5pF

D1: THOMPSON CSFBAR – 10 OR SIMILAR SCHOTTKY DIODE

SHORT, DIRECT CONNECTION TO GROUND PLANE.

Figure 21. Wideband Digitally Controlled Multiplier

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

24-Pin Cerdip (Suffix Q)