AD9022(RevB) データシートの表示（PDF） - Analog Devices

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AD9022
(Rev.:RevB)

12-Bit 20 MSPS Monolithic A/D Converter

Analog Devices 

AD9022

Analog Input

Analog input signals can be directly fed into the device under

test input (AIN). The AIN input is terminated at the device with

a 62 Ω resistor to give a parallel equivalent of 51 Ω (62 Ωʈ300 Ω).

DAC Reconstruction

The AD9022 evaluation board provides an onboard AD9713B

reconstruction DAC for observing the digitized analog input

signal. The AD9713B is terminated into 51 Ω to provide a

1 V p-p signal at the output (RC Output).

Output Data

The output data bits are latched with two 74LS574 latches

which drive a 40-pin connector (AMP p/n 102153-09). The

data and clock signals are available at the connector per the pin

assignments shown on the schematic of the evaluation board.

Data is latched on the rising edge of the encode clock.

BNC

J1

U2

AD9698R

CLOCK

5

11

R1

51⍀

6

9 12

CLK

E2 E1

+5V

R2

5.1k⍀

U2

AD9698R

4

14

3

13

16

C1

0.1␮F

1

CR1

AD589H

2

R21 9

100⍀ 10

8

BNC

J2

AIN

R7

62⍀

U6

74AS32

U1

AD9022Q

25

D9

D8

24

D10

D7

23

D11

D6

22

D12 LSB D5

21

D4

20

D3

8 ENCODE

19

D2

12

18

AIN MSB D1

17

COMP

C4

0.1␮F

U3

74LS574

2

3 1D

2D

4

3D

5

6 4D

5D

7

6D

8

7D

9

8D

19

1Q

18

2Q

3Q 17

16

4Q

5Q 15

6Q 14

7Q 13

8Q 12

CK OE

11

1

D12

R8

R9

D11

R10

D10

R11

D9

U4

74LS574

2

1D

3

2D

4

3D

5

4D

6

5D

7

6D

8

7D

9

8D

19

1Q

18

2Q

17

3Q

16

4Q

15

5Q

6Q 14

7Q 13

8Q 12

CK OE

11

1

D8

R12

D7

R14

D6

R15

D5

R16

D4

R17

D3

R18

D2

R19

R20

D1

U5

AD9713P

2

D12 (LSB)

3

R4

24 7.5k⍀

D11 RSET

4

20

D10 REFOUT

5

D9

6

D8

19

CIN

COUT 18

R3

20⍀

7

D7

8

D6

17

REFIN

C5

9

0.1␮F

D5

10

D4

11

D3

14

D2

IOUT 16

14

IOUT

–5.2V

R5

51⍀

28

D1 (MSB)

26 LE

BNC

J4

RC

OUT

R6

51⍀

–5.2V

+5V

C2

10␮F C6

C7

C8

C9

C10 C11 C12 C13 C22

20% 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F

35V

–5.2V

C3

10␮F

20%

35V

C14 C15 C16 C17 C18 C19 C20 C21

0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F 0.1␮F

J5

–5.2V

J6

+5V

J7

GND

U6

74AS32

1

3

2

U6

74AS32

4

6

5

U6

74AS32

12

11

13

CLK

D1

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

D12

H40DMC

J3

1

40

2

39

3

38

4

37

5

36

6

35

7

34

8

33

9

32

10

31

11

30

12

29

13

28

14

27

15

26

16

25

17

24

18

23

19

22

20

21

Figure 12. AD9022/PCB Evaluation Board Schematic

–10–

REV. B

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