REV. B

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.

a

CMOS

80 MHz, Triple 8-Bit Video DAC

ADV7120

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

Tel: 617/329-4700

Fax: 617/326-8703

FUNCTIONAL BLOCK DIAGRAM

REF WHITE

PIXEL

INPUT

PORT

IOR

IOG

IOB

R0

R7

CLOCK

8

SYNC

ADV7120

V

REF

GND

G0

G7

8

B0

B7

8

BLANK

FS

ADJUST

8

8

8

I

SYNC

V

AA

REFERENCE

AMPLIFIER

COMP

DAC

CONTROL

REGISTER

SYNC

CONTROL

RED

REGISTER

GREEN

REGISTER

BLUE

REGISTER

DAC

DAC

PRODUCT HIGHLIGHTS

1. Fast video refresh rate, 80 MHz.

2. Compatible with a wide variety of high resolution color

graphics video systems.

3. Guaranteed monotonic with a maximum differential non-

linearity of

±0.5 LSB. Integral nonlinearity is guaranteed to

be a maximum of

±1 LSB.

GENERAL DESCRIPTION

a single monolithic chip. The part is specifically designed for

high resolution color graphics and video systems. It is also ideal

for any high speed communications type applications requiring

low cost, high speed DACs. It consists of three, high speed,

8-bit, video D/A converters (RGB); a standard TTL input inter-

face and high impedance, analog output, current sources.

The ADV7120 has three separate, 8-bit, pixel input ports, one

each for red, green and blue video data. Additional video input

controls on the part include composite sync, blank and refer-

ence white. A single +5 V supply, an external 1.23 V reference

and pixel clock input are all that are required to make the part

operational.

The ADV7120 is capable of generating RGB video output sig-

nals, which are compatible with RS-343A and RS-170 video

standards, without requiring external buffering.

The ADV7120 is fabricated in a +5 V CMOS process. Its

monolithic CMOS construction ensures greater functionality

with low power dissipation. The part is packaged in both a 0.6",

40-pin plastic DIP and a 44-pin plastic leaded (J-lead) chip car-

rier, PLCC. The ADV7120 is also available in a very small 48-

lead Thin Quad Flatpack (TQFP).

ADV is a registered trademark of Analog Devices, Inc.

*Speed grades up to 140 MHz are also available upon special request.

Please contact Analog Devices or its representatives for further details.

FEATURES

80 MHz Pipelined Operation

Triple 8-Bit D/A Converters

RS-343A/RS-170 Compatible Outputs

TTL Compatible Inputs

+5 V CMOS Monolithic Construction

40-Pin DIP or 44-Pin PLCC and 48-Lead TQFP

APPLICATIONS

High Resolution Color Graphics

CAE/CAD/CAM Applications

Image Processing

Instrumentation

Video Signal Reconstruction

Desktop Publishing

Direct Digital Synthesis (DDS) and I/Q Modulation

SPEED GRADES*

80 MHz

50 MHz

30 MHz