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7

AGND

10

DEC

VRTA

VCCA

VCCD

VCCO

17

18

19

16 D1B

D2B

D3B

D4B

15

20

D0B

D5B

TTL OUTPUTS

LATCHES

ANALOG -TO-DIGITAL

CONVERTER

B

MLC374

TDA8705A

analog ground

data

outputs

LSB

MSB

6

25

26

27

24 D1A

D2A

D3A

D4A

23

28

D0A

D5A

TTL OUTPUTS

LATCHES

ANALOG -TO-DIGITAL

CONVERTER

A

data

outputs

LSB

MSB

6

9

5

12

14

REGULATOR

CLOCK DRIVER

VRBA

VRMA

VRTB

VRMB

4

VIA

RINTA

RINTB

6

VRBB

13

VIB

11

8

2

21

3

DGND

1

CLK

digital ground

22

OGND

output ground

reference

voltage TOP

A

reference

voltage TOP

B

analog

voltage input

A

reference

voltage BOTTOM

A

analog

voltage input

B

reference

voltage BOTTOM

B

reference

voltage MIDDLE

A

reference

voltage MIDDLE

B

Fig.1 Block diagram.