ANALOG DEVICES AD9981 Service Manual

Evaluation Board for the

High Performance 10-Bit Display Interface

FEATURES

Two analog input connectors for RGB or YPbPr input
Separate, low-noise regulators for each AD9981 power

domain (VD, VDD, and PVD)

100-pin interface connector provides 5 V input and

AD9981 outputs (syncs, clock, and data)

APPLICATIONS

For evaluation of AD9981 as part of the

AD9981 evaluation kit

Can also be adapted to end-user evaluation platform

using the 100-pin interface connector

PACKAGE CONTENTS

AD9981 evaluation board
10-bit display interface board (AD998xEB)
DEPL evaluation software including preset files
DEPL evaluation board documentation
5 V power supply
USB and parallel port cables

ANALOG FLAT PANEL INTERFACE BOARD

AD9981/PCB

PRODUCT DESCRIPTION

The purpose of the AD9981 evaluation board is both to
demonstrate the performance of the AD9981 and to serve as an
implementation example for design and layout. To aid in real­world evaluation, it was designed so that it could be connected
as easily as possible into another PC board, such as a graphics
controller board.

This board is for IC device evaluation purposes only. Analog
Devices does not recommend using this hardware outside of
this stated usage. Further, Analog Devices provides no warran­ties for use of this equipment beyond the scope of IC device
evaluation purposes.

REQUIREMENTS

The requirements to use the AD9981 evaluation board are a 5 V
power supply, graphics signals (through either of the 15-pin VGA
connectors), and a means to program the internal chip registers.
Hardware and software for programming the internal chip reg­ister are provided.

Rev. 0

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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.

Figure 1. Board Shown in Centimeters

05440-001

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

www.analog.com

AD9981/PCB

TABLE OF CONTENTS

Evaluation Board Hardware ............................................................ 3

Sample Settings for The Evaluation Board ................................6

Typical Configuration.................................................................. 3

Power .............................................................................................. 3

Programming the Internal Chip Registers................................ 3

Evaluation Board Software .............................................................. 4

Settting up the Software............................................................... 4

AD9981 Software Control........................................................... 5

REVISION HISTORY

3/05—Revision 0: Initial Version

Schematics and Layout .....................................................................7

Ordering Information.................................................................... 11

Bill of Materials........................................................................... 11

Ordering Guide .......................................................................... 11

Contact Information.................................................................. 11

ESD Caution................................................................................ 11

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AD9981/PCB

EVALUATION BOARD HARDWARE

TYPICAL CONFIGURATION

In most cases, this evaluation board is used to digitize analog
RGB graphics signals and pass the data to another board. To do
this, connect the graphics signals to the 15-pin VGA connector,
supply 5 V to the board, and program the internal serial
register. The digitized data, generated clock signals, and control
signals are passed off the board through the right-side
connector.

POWER

The AD9981 evaluation board contains two 3.3 V voltage
regulators and an adjustable regulator set for 1.8 V. These
regulators supply power to the AD9981. The three regulators
provide power to the three power supplies on the AD9981 (refer
to the AD9981 data sheet). The best performance can be
obtained from the AD9981 when the analog supply (V

) and

D

the PLL (PV
the primary 3.3 V supply (V
nominally when supplied with 5 V, but work with a range of
voltages. Power is applied to the board through the right-side
connector (Pins 1–4 of J3). Typically, power is supplied from
another board. In the AD9981 evaluation kit, 5 V is supplied by
the 10-bit display interface board.

PROGRAMMING THE INTERNAL CHIP REGISTERS

Hardware and software for programming the AD9981 internal
registers are provided. The hardware consists of a standard
printer cable and a receiver chip located on the panel driver
board. The programming signals come onto the AD9981
evaluation board through Pins 7 and 9 on Connector J3. The
software is included on the installation CD and is described in
the Evaluation Board Software section.

) supply have their own regulators separate from

D

). The three regulators work

DD

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AD9981/PCB

EVALUATION BOARD SOFTWARE

SETTTING UP THE SOFTWARE

The display electronics product line (DEPL) evaluation software
is a Visual Basic® program requiring Windows® 95, or later. It is
on a self-installing CD package included with the evaluation
board. When performing the software install, always use the
most recent Windows files (DLL or OCX, for example) if
prompted by the install software (these files may already be on
your system). The AD9882 register setup screen (similar to the

DEPL Evaluation Software – AD9981 register setup window in
Figure 2) should be displayed at program execution after a
successful installation. The DEPL evaluation software can
control any of the DEPL AD988x or AD998x devices. It can also
read and write to the 10-bit display interface board and includes
useful tools such as a PLL Divisor calculator.

Figure 2. DEPL Evaluation Software—AD9981 Register Setup Window

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