REV. A

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a

Quad 14-Bit DAC

AD7836

FEATURES

Four 14-Bit DACs in One Package

Voltage Outputs

Separate Offset Adjust for Each Output

Reference Range of

5 V

Maximum Output Voltage Range of

10 V

Clear Function to User-Defined Code

44-Pin MQFP Package

APPLICATIONS

Process Control

Automatic Test Equipment

General Purpose Instrumentation

GENERAL DESCRIPTION

The AD7836 contains four 14-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 AD7836 accepts 14-bit parallel loaded data from the exter-

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

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

The DAC outputs are updated individually, on reception of new

data. In addition, the SEL input can be used to apply the user

programmed value in DAC Register E to all DACs, thus setting

all DAC output voltages to the same level. The contents of the

DAC data registers are not affected by the SEL input.

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 AD7836 is available in a 44-lead MQFP package.

FUNCTIONAL BLOCK DIAGRAM

DATA

REG

A

DATA

REG

B

MUX

DAC A

MUX

MUX

MUX

DATA

REG

C

DATA

REG

D

DATA

REG

E

X1

X1

X1

X1

X1

X1

X1

X1

R

R

R

R

R

R

R

R

INPUT

BUFFER

AD7836

ADDRESS

DECODE

DUTGND D

DUTGND C

DUTGND B

DUTGND A

A0

A1

A2

DB0

WR

CS

DB13

SEL

AGND

DGND

14

14

14

14

14

DAC B

DAC D

DAC B

CLR

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Tel: 781/329-4700

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

Fax: 781/326-8703

© Analog Devices, Inc., 1999