a
FEATURES
80 MHz Pipelined Operation
Triple 10-Bit D/A Converters
RS-343A/RS-170 Compatible Outputs
TTL Compatible Inputs
+5 V CMOS Monolithic Construction
40-Pin DIP Package (ADV7121)
44-Pin PLCC Package (ADV7122)
48-Lead TQFP (ADV7122)
CMOS
80 MHz, Triple 10-Bit Video DACs
ADV7121/ADV7122
ADV7121 FUNCTIONAL BLOCK DIAGRAM
FS
ADJUST
VAA
REFERENCE
AMPLIFIER
ADV7121
COMP
CLOCK
RED
REGISTER
10
10
GREEN
REGISTER
10
10
BLUE
REGISTER
10
10
R0
R9
APPLICATIONS
High Definition Television (HDTV)
High Resolution Color Graphics
CAE/CAD/CAM Applications
Image Processing
Instrumentation
Video Signal Reconstruction
Direct Digital Synthesis (DDS)
I/Q Modulation
VREF
PIXEL
INPUT
PORT
G0
G9
B0
B9
DAC
IOR
DAC
IOG
DAC
IOB
GND
ADV7122 FUNCTIONAL BLOCK DIAGRAM
SPEED GRADES
80 MHz
50 MHz
30 MHz
FS
ADJUST
VAA
VREF
REFERENCE
AMPLIFIER
ADV7122
COMP
CLOCK
GENERAL DESCRIPTION
®
The ADV7121/ADV7122 (ADV ) is a video speed, digital-toanalog converter on a single monolithic chip. The part is specifically designed for high resolution color graphics and video
systems including high definition television (HDTV). It is also
ideal for any application requiring a low cost, high speed DAC
function especially in communications. It consists of three, high
speed, 10-bit, video D/A converters (RGB), a standard TTL input
interface and high impedance, analog output, current sources.
The ADV7121/ADV7122 has three separate, 10-bit, pixel input
ports, one each for red, green and blue video data. A single +5 V
power supply, an external 1.23 V reference and pixel clock input is
all that is required to make the part operational. The ADV7122
has additional video control signals, composite SYNC and BLANK.
The ADV7121/ADV7122 is capable of generating RGB video
output signals which are compatible with RS-343A, RS-170 and
most proposed production system HDTV video standards, including SMPTE 240M.
The ADV7121/ADV7122 is fabricated in a +5 V CMOS process. Its monolithic CMOS construction ensures greater functionality with low power dissipation. The ADV7121 is packaged
in a 0.6", 40-pin plastic DIP package. The ADV7122 is packADV is a registered trademark of Analog Devices, Inc.
*Speed grades up to 140 MHz are also available on special request.
Please contact Analog Devices or its representatives for 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.
10
RED
10
REGISTER
DAC
IOR
10
GREEN
10
REGISTER
DAC
IOG
10
10
BLUE
REGISTER
DAC
IOB
R0
R9
PIXEL
INPUT
PORT
G0
G9
B0
B9
CONTROL
REGISTER
BLANK
SYNC
CONTROL
SYNC
GND
aged in a 44-pin plastic leaded (J-lead) chip carrier, PLCC,
and 48-lead thin quad flatpack (TQFP).
PRODUCT HIGHLIGHTS
1. Fast video refresh rate, 80 MHz.
2. Guaranteed monotonic to 10 bits. Ten bits of resolution allows for implementation of linearization functions such as
gamma correction and contrast enhancement.
3. Compatible with a wide variety of high resolution color
graphics systems including RS-343A/RS-170 and the proposed SMPTE 240M standard for HDTV.
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703