adv7120kn80 Analog Devices, Inc., adv7120kn80 Datasheet

no-image

adv7120kn80

Manufacturer Part Number
adv7120kn80
Description
Cmos 80 Mhz, Triple 8-bit Video Dac
Manufacturer
Analog Devices, Inc.
Datasheet
a
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 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.
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.
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
PRODUCT HIGHLIGHTS
1. Fast video refresh rate, 80 MHz.
2. Compatible with a wide variety of high resolution color
3. Guaranteed monotonic with a maximum differential non-
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
INPUT
PIXEL
PORT
REF WHITE
80 MHz, Triple 8-Bit Video DAC
graphics video systems.
linearity of 0.5 LSB. Integral nonlinearity is guaranteed to
be a maximum of 1 LSB.
CLOCK
BLANK
SYNC
G0
G7
R0
R7
B0
B7
FUNCTIONAL BLOCK DIAGRAM
GND
V
AA
ADV7120
8
8
8
REGISTER
REGISTER
REGISTER
REGISTER
CONTROL
ADJUST
GREEN
BLUE
RED
FS
8
8
8
V
REF
ADV7120
CONTROL
DAC
DAC
DAC
SYNC
REFERENCE
AMPLIFIER
Fax: 617/326-8703
CMOS
COMP
IOR
IOG
IOB
I
SYNC

Related parts for adv7120kn80

adv7120kn80 Summary of contents

Page 1

... 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. ...

Page 2

ADV7120–SPECIFICATIONS Parameter STATIC PERFORMANCE Resolution (Each DAC) Accuracy (Each DAC) Integral Nonlinearity, INL Differential Nonlinearity, DNL Gray Scale Error Coding DIGITAL INPUTS Input High Voltage, V INH Input Low Voltage, V INL Input Current Input Capacitance, C ...

Page 3

TIMING CHARACTERISTICS Parameter 80 MHz Version 50 MHz Version MAX 12 ...

Page 4

... B5 NOTE For the ADV7120 in TQFP package: The REF WHITE pin is not available. The I pin is not available and is internally connected to the IOG pin. SYNC Typ Max Units Model 5.00 5.25 Volts ADV7120KN80 +70 C ADV7120KN50 ADV7120KN30 37.5 ADV7120KP80 1.235 1.26 Volts ADV7120KP50 ADV7120KP30 ADV7120KST50 50 MHz +0.5 V ADV7120KST30 30 MHz ...

Page 5

Pin Mnemonic Function BLANK Composite blank control input (TTL compatible). A logic zero on this control input drives the analog out- puts, IOR, IOB and IOG, to the blanking level. The BLANK signal is latched on the rising edge of ...

Page 6

ADV7120 TERMINOLOGY Blanking Level The level separating the SYNC portion from the video portion of the waveform. Usually referred to as the front porch or back porch IRE units the level which will shut off the ...

Page 7

If we, therefore, have a graphics system with a 1024 1024 resolution, a noninterlaced 60 Hz refresh rate and a retrace fac- tor of 0.8, then: Dot Rate = 1024 1024 60/0.8 = 78.6 MHz RED, BLUE GREEN mA V ...

Page 8

ADV7120 A resistance R connected between FS ADJUST and GND SET determines the amplitude of the output video level according to the following equations: IOG (mA) = 12,082 V (V)/R REF SET IOR, IOB (mA) = 8,628 V (V)/R REF ...

Page 9

The unused analog outputs should be terminated with the same load as that for the used channel. In other words, if the red channel is used and IOR is terminated with a doubly terminated 75 load (37.5 ), IOB and ...

Page 10

ADV7120 PC BOARD LAYOUT CONSIDERATIONS The ADV7120 is optimally designed for lowest noise perfor- mance, both radiated and conducted noise. To complement the excellent noise performance of the ADV7120 imperative that great care be given to the PC ...

Page 11

Power Planes The PC board layout should have two distinct power planes, one for analog circuitry and one for digital circuitry. The analog power plane should encompass the ADV7120 (V sociated analog circuitry. This power plane should be connected to ...

Page 12

ADV7120 0.045 TYP 0.17 (4.32) MAX 0.021 (0.533) 0.015 (0.381) 0.004 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 44-Terminal Plastic Leaded Chip Carrier (P-44A) 0.045 TYP 0.045 TYP PIN 1 IDENTIFIER 0.045 ...

Related keywords