REV. 0

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a

AD7839

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 1999

Octal 13-Bit, Parallel Input,

Voltage-Output DAC

FUNCTIONAL BLOCK DIAGRAM

DAC

REG

A

INPUT

REG

A

13

DAC E

AD7839

DB12

DB0

WR

CS

A0

A1

A2

LDAC

RR

RR

R

R

R

R

R

R

R

R

R

R

R

R

13

13

DAC

REG

B

INPUT

REG

B

13

13

13

DAC

REG

C

INPUT

REG

C

13

13

13

DAC

REG

D

INPUT

REG

D

13

13

13

DAC

REG

E

INPUT

REG

E

13

13

13

DAC

REG

F

INPUT

REG

F

13

13

13

DAC

REG

G

INPUT

REG

G

13

13

13

DAC

REG

H

INPUT

REG

H

13

13

13

DAC D

DAC C

DAC F

DAC B

DAC A

DAC G

DAC H

AB

AB

DUTGND

CD

DUTGND

AB

DUTGND

GH

DUTGND

EF

CDEF

CDEF

GH

GH

GND

CLR

FEATURES

Eight 13-Bit DACs in One Package

Voltage Outputs

Offset Adjust for Each DAC Pair

Reference Range of

5 V

Maximum Output Voltage Range of

10 V

Clear Function to User-Defined Voltage

44-Lead MQFP Package

APPLICATIONS

Automatic Test Equipment

Process Control

General Purpose Instrumentation

GENERAL DESCRIPTION

The AD7839 contains eight 13-bit DACs on one monolithic

chip. It has output voltages with a full-scale range of

±10 V

from reference voltages of

±5 V.

The AD7839 accepts 13-bit parallel loaded data from the exter-

nal bus into one of the input registers under the control of the

WR, CS and DAC channel address pins, A0–A2.

The DAC outputs are updated on reception of new data into

the DAC registers. All the outputs may be updated simulta-

neously by taking the

LDAC input low.

Each DAC output is buffered with a gain-of-two amplifier into

which an external DAC offset voltage can be inserted via the

DUTGNDx pins.

The AD7839 is available in a 44-lead MQFP package.