ADV476KP50 Analog Devices, ADV476KP50 Datasheet

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ADV476KP50

Manufacturer Part Number
ADV476KP50
Description
Manufacturer
Analog Devices
Datasheet

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a
GENERAL DESCRIPTION
The ADV476 (ADV
ible RAM-DAC designed specifically for VGA and Personal
System/2 color graphics.
The ADV476 is a complete analog output RAM-DAC on a
single monolithic chip. The part contains a 256 18 color
lookup table, a pixel mask register as well as a triple 6-bit video
D/A converter. The ADV476 is capable of simultaneously dis-
playing up to 256 colors, from a total color palette of 262,144
addressable colors.
The on-chip asynchronous MPU bus allows access to the color
lookup table without affecting the input video data via the pixel
port. The pixel read mask register provides a convenient way of
altering the displayed colors without updating the color lookup
table. The ADV476 is capable of generating RGB video output
signals which are compatible with RS-343A and RS-170 video
standards, without requiring external buffering.
* Personal System/2 and VGA are trademarks of International Business
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.
Machines Corp.
ADV is a registered trademark of Analog Devices, Inc.
FEATURES
Personal System/2* and VGA* Compatible
Plug-in Replacement for INMOS 171/176
66 MHz Pipelined Operation
Three 6-Bit D/A Converters
256 18 Color Palette RAM
RS-343A/RS-170 Compatible Outputs
Blank on All Three Channels
Standard MPU Interface
Asynchronous Access to All Internal Registers
Low Power Dissipation
Standard 28-Pin, 0.6" DIP and 44-Pin PLCC
APPLICATIONS
High Resolution Color Graphics
CAE/CAD/CAM Applications
Image Processing
Instrumentation
Desktop Publishing
AVAILABLE CLOCK RATES
66 MHz
50 MHz
35 MHz
5 V CMOS Monolithic Construction
®
) is a pin compatible and software compat-
The ADV476 is fabricated in a +5 V CMOS process. Its mono-
lithic CMOS construction ensures greater functionality with low
power dissipation and small board area. The part is packaged in
a 0.6", 28-pin DIP and a 44-pin PLCC.
PRODUCT HIGHLIGHTS
1. Standard video refresh rates, 35 MHz, 50 MHz and
2. Fully compatible with VGA and Personal System/2 color
3. Guaranteed monotonic. Integral and differential linearity
4. Low glitch energy, 75 pV secs.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
66 MHz.
graphics.
guaranteed to be a maximum of 1 LSB.
CMOS Monolithic 256 18
FUNCTIONAL BLOCK DIAGRAM
Color Palette RAM-DAC
ADV476
Fax: 617/326-8703

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ADV476KP50 Summary of contents

Page 1

... ADV is a registered trademark of Analog Devices, Inc. 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 ...

Page 2

ADV476–SPECIFICATIONS Parameter STATIC PERFORMANCE Resolution (Each DAC) Accuracy (Each DAC) Integral Nonlinearity Full Scale Error Blank Level Offset Error DIGITAL INPUTS Input High Voltage, V INH Input Low Voltage, V INL Input Current Input Current (RD Input Only) ...

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TIMING CHARACTERISTICS Parameter 66 MHz Version 50 MHz Version MAX ...

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... V CC Model Speed ADV476KN35 35 MHz ADV476KN50 50 MHz ADV476KN66 66 MHz ADV476KP35 35 MHz ADV476KP50 50 MHz CC ADV476KP66 66 MHz NOTES 1 All devices are specified for +70 C operation. 2 Devices are packaged in 0.6" 28-pin plastic DIPs (N-28), and 44-pin J-leaded PLCC (P-44A Plastic DIP Plastic Leaded Chip Carrier. ...

Page 5

PIN FUNCTION DESCRIPTION Pin Mnemonic Function BLANK Composite blank control input (TTL compatible). A logic zero on this control input drives the analog outputs to the blanking level, as shown in Table V. The BLANK signal is latched on the ...

Page 6

ADV476 MPU Interface As illustrated in the functional block diagram, the ADV476 sup- ports a standard MPU bus interface, allowing the MPU direct access to the color palette RAM. The RS0 and RS1 control inputs specify whether the MPU is ...

Page 7

... RS-343A and RS-170, is available in an application note entitled “Video Formats & load, such Required Load Terminations,” available from Analog Devices. Figure 5 shows the video waveforms associated with the three RGB outputs, driving the doubly terminated 75 load. This arrangement ure 4a ...

Page 8

ADV476 Description WHITE LEVEL VIDEO BLACK LEVEL BLANK LEVEL NOTE 1 Typical with full Scale RED, GREEN, BLUE = 19.05 mA. I Reference Input The ADV476 requires an active current reference to enable the DACs provide stable and accurate video ...

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... ADV476 to minimize reflections. Note: For additional information on PC Board-Layout see Application Note “Design and Layout of a Video Graphics System for Reduced EMI”, available from Analog Devices (Pub. No. E1309–15–10/89). –9– ADV476 ...

Page 10

ADV476 Figure 7. ADV476 Typical Connection Diagram and Component List Figure 8. Connection of V REF with the ADV476KP (44-Pin PLCC) and COMP –10– OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 28-Pin Plastic DIP (N-28) REV. B ...

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ADV476 –12– REV. B ...

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