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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
CMOS
80 MHz, Triple 8-Bit Video DAC
ADV7120
FUNCTIONAL BLOCK DIAGRAM
FS
ADJUST
VAA
VREF
REFERENCE
AMPLIFIER
ADV7120
COMP
CLOCK
8
PIXEL
INPUT
PORT
G7
B0
B7
GREEN
REGISTER
8
8
G0
RED
8
REGISTER
8
R0
R7
BLUE
REGISTER
8
REF WHITE
CONTROL
REGISTER
BLANK
SYNC
DAC
IOR
DAC
IOG
DAC
IOB
SYNC
CONTROL
ISYNC
GND
GENERAL DESCRIPTION
The ADV7120 (ADV®) is a digital to analog video converter on
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 interface and high impedance, analog output, current sources.
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 nonlinearity of ± 0.5 LSB. Integral nonlinearity is guaranteed to
be a maximum of ± 1 LSB.
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 reference 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 signals, 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 carrier, PLCC. The ADV7120 is also available in a very small 48lead 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.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
