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a

FEATURES

+5 to 15 Volt Operation

Unipolar or Bipolar Operation

True Voltage Output

Double-Buffered Inputs

Reset to Min or Center Scale

Fast Bus Access Time

Readback

APPLICATIONS

Automatic Test Equipment

Digitally Controlled Calibration

Servo Controls

Process Control Equipment

GENERAL DESCRIPTION

Quad, 12-Bit DAC

Voltage Output with Readback

DAC8412/DAC8413

FUNCTIONAL BLOCK DIAGRAM

V

LOGIC

I/O

PORT

12

DGND

A0

A1

R/W

CS

CONTROL

LOGIC

INPUT

REG A

INPUT

REG B

INPUT

REG C

INPUT

REG D

OUTPUT

REG A

OUTPUT

REG B

OUTPUT

REG C

OUTPUT

REG D

V

DD

V

REFH

DATA I/O

DAC A

V

OUTA

DAC B

V

OUTB

DAC C

V

OUTC

DAC D

V

OUTD

V

REFL

V

SS

RESET

LDAC

The DAC8412 and DAC8413 are quad, 12-bit voltage output

DACs with readback capability. Built using a complementary

BiCMOS process, these monolithic DACs offer the user very

high package density.

Output voltage swing is set by the two reference inputs V

REFH

and V

REFL

. By setting the V

REFL

input to 0 volts and V

REFH

to a

positive voltage, the DAC will provide a unipolar positive output

range. A similar configuration with V

REFH

at 0 volts and V

REFL

at a negative voltage will provide a unipolar negative output

range. Bipolar outputs are configured by connecting both V

REFH

and V

REFL

to nonzero voltages. This method of setting output

voltage range has advantages over other bipolar offsetting meth-

ods because it is not dependent on internal and external resis-

tors with different temperature coefficients.

Digital controls allow the user to load or read back data from

any DAC, load any DAC and transfer data to all DACs at one

time.

An active low

RESET

loads all DAC output registers to mid-

scale for the DAC8412 and zero scale for the DAC8413.

The DAC8412/DAC8413 are available in 28-pin plastic DIP,

cerdip, PLCC and LCC packages. They can be operated from

a wide variety of supply and reference voltages with supplies

ranging from single +5 volt to

鹵

15 volts, and references from

+2.5 to

鹵

10 volts. Power dissipation is less than 330 mW with

鹵

15 volt supplies and only 60 mW with a +5 volt supply.

For MIL-STD-883 applications, contact your local ADI sales

office for the DAC8412/DAC8413/883 data sheet which speci-

fies operation over the 鈥?5擄C to +125擄C temperature range. All

883 parts are also available on Standard Military Drawings

5962-91-76401MXA through -76404M3A.

INL vs. Code Over Temperature

REV. C

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 617/329-4700

Fax: 617/326-8703

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