Analog Devices EVAL-ADD8504 Manual de usuario

Evaluation Board for 4-, 5-, 6-Channel, Muxed

Input Line Inversion LCD Gamma Buffers

EVAL-ADD8504/ADD8505/ADD8506

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 www.analog.com

FEATURES

Socket for evaluating ADD8504, ADD8505, or ADD8506

Sockets for implementing gamma resistors

External drive capability

Simulates panel behavior

Sockets for capacitive loads

Sockets for resistive loads

Breadboard area

PACKAGE CONTENTS

Data sheets

ADD8504/ADD8505/ADD8506 data sheet

EVAL-ADD8504/ADD8505/ADD8506 evaluation

board data sheet

CD including

Electronic version of ADD8504/ADD8505/ADD8506 data

sheet

Electronic version of EVAL-ADD8505/ADD8505/ADD8506

evaluation board data sheet

Excel®-based spreadsheet for resistor and power

calculations

Five ADD8504 devices

Five ADD8505 devices

Five ADD8506 devices

GENERAL DESCRIPTION

The ADD8504/ADD8505/ADD8506 evaluation board

simplifies evaluation of the ADD8504/ADD8505/ADD8506

under various conditions. This evaluation kit includes a gamma

voltage calculator, labeled ADD8504-05-06 Gamma Voltage

Calculator.xls, on the ADD8504/ADD8505/ADD8506

evaluation board kit CD to assist in determining required

external components to implement the desired gamma voltages.

This documentation is for the ADD8504/ADD8505/ADD8506

evaluation board only; for specific information regarding the

ADD8504/ADD8505/ADD8506 muxed input line inversion

LCD gamma buffers, please refer to the datasheet.

EVALUATION BOARD

05763-001

Figure 1. ADD8504/ADD8505/ADD8506 Evaluation Board

EVAL-ADD8504/ADD8505/ADD8506

Rev. 0 | Page 2 of 8

TABLE OF CONTENTS

Features .............................................................................................. 1

Package Contents.............................................................................. 1

General Description ......................................................................... 1

Evaluation Board .............................................................................. 1

Revision History ............................................................................... 2

Setting Up the Evaluation Board .................................................... 3

Part Placement in Socket............................................................. 3

Factory Settings ............................................................................ 3

Switching ....................................................................................... 4

Gamma Resistor Strings...............................................................4

Output Load Sockets.....................................................................4

Evaluation Board Layout ..................................................................5

Functional Blocks..........................................................................5

Evaluation Board Layers...............................................................6

Evaluation Board Schematic and Components.........................7

Ordering Guide..................................................................................8

ESD Caution...................................................................................8

REVISION HISTORY

2/06—Revision 0: Initial Version

EVAL-ADD8504/ADD8505/ADD8506

Rev. 0 | Page 3 of 8

SETTING UP THE EVALUATION BOARD

To begin using the ADD8504/ADD8505/ADD8506 evaluation

board:

1. Use existing, or modify, Gamma Resistor RA1 to Gamma

Resistor RA7, and Gamma Resistor RB1 to Gamma

Resistor RB7 in Block 2 (see Figure 4).

2. Install the ADD8504/ADD8505/ADD8506 in the socket in

Block 3, see Figure 4. Read the Part Placement in Socket

section for proper part placement and refer to Figure 4 for

the ADD8504/ADD8505/ADD8506 evaluation board

layout.

3. Connect a +5 V power supply to at least one of the three

pins labeled VCC, and connect ground to at least one of

the three pins labeled GND in Block 5 (see Figure 4).

If the above list is complete, the user can probe the input and

output voltages. To switch between the two gamma resistor

strings, connect a switching signal to Pin A/B or toggle the

hardware switch (SW1) between Position A and Position B

(refer to Figure 4).

PART PLACEMENT IN SOCKET

The ADD8504/ADD8505/ADD8506 have 16, 20, and 24 pins,

respectively. To properly place the part in the socket refer to

Figure 2.

ADD8504

The ADD8504 uses Socket Pin 3 to Socket Pin 10, and Socket

Pin 15 to Socket Pin 22. Only Input/Output 2 through Input/

Output 5 are used on the evaluation board. Power and ground

pins are unaffected. Refer to the ADD8504/ADD8505/ADD8506

data sheet for proper pin designations for the ADD8504.

ADD8505

The ADD8505 uses Socket Pin 1 to Socket Pin 10, and Socket

Pin 15 to Socket Pin 24. Only Input/Output 1 through Input/

Output 5 are used on the evaluation board. Power and ground

pins are unaffected. Refer to the ADD8504/ADD8505/ADD8506

data sheet for proper pin designations for the ADD8505.

ADD8506

The ADD8506 fills the socket and uses all input/output pins of

the evaluation board.

INA1

ADD8505

ADD8504

ADD8506

VCC1

INB1

OUT1

INA2

OUT2

INB2

OUT3

INA3

VCC2

INB3

A/B

INA4

GND

INB4

GND

INA5

OUT4

INB5

OUT5

INA6

OUT6

INB6

VCC3

05763-002

ADD8505

ADD8506

Figure 2. Part Placement in Socket

FACTORY SETTINGS

The ADD8504/ADD8505/ADD8506 evaluation board is pre-

configured with one 20 kΩ resistor and thirteen 10 kΩ resistors

filling the two gamma resistor strings, for a total of 14 resistors

labeled RA1 to RA7 and RB1 to RB7 as shown in Figure 4. The

20 kΩ resistor is labeled RA1 and serves to differentiate the two

resistor strings to make the outputs change significantly; output

voltages are listed in Table 1.

The board is shipped with an ADD8506 in the TSSOP socket.

All six output load resistors are jumpered (0 Ω resistors), and all

six output load capacitors are 1 nF.

Table 1. Factory Settings1

OUTPUT PIN GAMMA A GAMMA B

OUT1_L 3.750 V 0.714 V

OUT2_L 3.125 V 1.429 V

OUT3_L 2.500 V 2.143 V

OUT4_L 1.875 V 2.857 V

OUT5_L 1.250 V 3.571 V

OUT6_L 0.625 V 4.286 V

1Ideal voltages may differ slightly (±2%).

EVAL-ADD8504/ADD8505/ADD8506

Rev. 0 | Page 4 of 8

SWITCHING

The ADD8504/ADD8505/ADD8506 evaluation board can be

switched by driving the A/B pin of Block 1 with a 0 V to 5 V

clock. A 5 V input on the A/B pin selects GAMMA A; a 0 V

input selects GAMMA B. The user can also switch manually

using hardware Switch SW1. Switch Position A selects

GAMMA A (RA1 to RA7), and switch Position B selects

GAMMA B (RB1 to RB7), see Figure 3.

GAMMA RESISTOR STRINGS

The ADD8504/ADD8505/ADD8506 evaluation board includes

two external gamma resistor strings consisting of seven resistors

each to produce the necessary tap point voltages. This board has

been preconfigured (refer to the Factory Settings section for

details) as follows: GAMMA A consists of Resistor RA1 to

Resistor RA7, and GAMMA B consists of Resistor RB1 to

Resistor RB7 (see Figure 3).

The user can change the resistor values to produce the desired

voltages. Included with the ADD8504/ADD8505/ADD8506

evaluation board kit is the gamma voltage calculator that allows

the user to specify the desired voltages and automatically calcu-

late the necessary resistor values. In addition, the calculator

allows the user to specify resistances and calculate voltages. The

gamma voltage calculator expedites the evaluation process. It is

located on the ADD8504/ADD8505/ADD8506 evaluation board

kit CD labeled ADD8504-05-06 Gamma Voltage Calculator.xls.

RA1 INA1

GAMMA A

(VCOM+)

GAMMA B

(VCOM–)

INA2

INA3

INA4

INA5

INA6

INB1

INB2

INB3

INB4

INB5

INB6

RA2

RA3

RA4

RA5

RA6

RA7

RB1

GND

RB2

RB3

RB4

RB5

RB6

RB7

05763-003

Figure 3. Gamma Resistor String Schematic

OUTPUT LOAD SOCKETS

Sockets are provided on the evaluation board for a series

resistance and capacitive load to ground for each of the six

gamma buffer outputs. The sockets are labeled RLOAD1 to

RLOAD6 and CLOAD1 to CLOAD6; they are located in Block 4

on the evaluation board (see Figure 4). These loads are optional

and are for customer evaluation purposes only. If no load is

desired, neither resistor nor capacitor should be added.

As shipped from the factory, all six output load resistors are

jumpered (0 Ω resistors). All six output load capacitors are 1 nF.

EVAL-ADD8504/ADD8505/ADD8506

Rev. 0 | Page 5 of 8

EVALUATION BOARD LAYOUT

FUNCTIONAL BLOCKS

05763-004

BLOCK 1

BLOCK 5

BLOCK 2 BLOCK 3 BLOCK 4

BLOCK 6

Figure 4. Evaluation Board Layout

Table 2. Evaluation Board Functional Block Descriptions

Block Block Descriptions

Block 1 Input and Monitoring Pins. Block 1 allows the user to force gamma voltages, drive Gamma Resistor Switch A/B, or monitor input

voltages.

Block 2 Gamma Resistor Strings. Block 2 allows the user to select the resistors to set the desired gamma voltages. Use the gamma voltage

calculator to make these calculations; it can be found on the ADD8504/ADD8505/ADD8506 evaluation board kit CD labeled

ADD8504-05-06 Gamma Voltage Calculator.xls.

Block 3 Part/Socket. This block area accepts a 16-, 20-, or 24-lead TSSOP IC footprint or socket. Read the Part Placement in Socket section

for details (socket part# OTS-24(28)-0.65-01).

Block 4 Load. This block allows the user to set load conditions using resistors and capacitors.

Block 5 Output and Power Pins. Connect power to at least one pin labeled VCC and connect ground to at least one pin labeled GND.

Multiple VCC and GND pins are for convenience only. The other pins are for probing the output voltages. The _L outputs are

loaded outputs.

Block 6 Breadboard Area. This block area is not electrically wired to the evaluation board. It provides an area to place extra components.

EVAL-ADD8504/ADD8505/ADD8506

Rev. 0 | Page 6 of 8

EVALUATION BOARD LAYERS

05763-005

Figure 5. Evaluation Board Layout—Top Layer

05763-006

Figure 6. Evaluation Board Layout—Bottom Layer

Table 3. Evaluation Board Layer Descriptions

Layer Description

Blue (Top) Top-of-board metal traces and ground plane. See Figure 5.

Red (Bottom) Bottom-of-board metal traces and ground plane. (Note: Top-view shown in Figure 6. Silk screen text is shown for

orientation purposes; text does not appear on bottom of board.)

EVAL-ADD8504/ADD8505/ADD8506

Rev. 0 | Page 7 of 8

EVALUATION BOARD SCHEMATIC AND COMPONENTS

05763-007

RB1

TBD INA1

OUT1

OUT2

OUT4

OUT5

OUT6

OUT3

OUT1_L

OUT2_L

OUT4_L

OUT5_L

OUT6_L

OUT3_L

A/B

VCC3

VCC2

VCC1

VCC

INB1

INA2

INB2

INA3

INB3

INA4

INB4

INA5

INB5

INA6

INB6

RB2

TBD

RB3

TBD

RB4

TBD

RB5

TBD

RB6

TBD

RB7

TBD

RA1

TBD

VCC2

ADD8506

DGND

RA2

TBD

RA3

TBD

RA4

TBD

RA5

TBD

RA6

TBD

RA7

TBD

0.1µF

VCC2

DGND

CLOAD2

1nF

GND1

GND2

VCC

GND GND

VCC1

VCC2

VCC3

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

OUT6_L

OUT5_L

OUT4_L

OUT3_L

OUT2_L

OUT1_L

GND2

GND1

GND DGND

CLOAD3

1nF

DGND

CLOAD1

1nF

DGND

0.1µF

DGND

0.1µF

1µF

0.1µF

DGND

0.1µF

RLOAD1

TBD

100kΩ

RLOAD2

TBD

RLOAD3

TBD

RLOAD4

TBD

RLOAD5

TBD

RLOAD6

TBD

DGND

CLOAD4

1nF

CLOAD6

1nF

DGND

DGND DGND DGND DGND

DGND DGND

OUTPUT AND POWER

CONNECTOR

CLOAD5

1nF

1MΩ

Figure 7. Evaluation Board Schematic

EVAL-ADD8504/ADD8505/ADD8506

Rev. 0 | Page 8 of 8

Table 4. Evaluation Board Components and Pin Descriptions

Label Description

A/B Switch pin (resistor string select)

C1 Power supply compensation capacitor (0.1 μF)

C2 Power supply compensation capacitor (0.1 μF)

C3 Power supply compensation capacitor (0.1 μF)

C4 Power supply compensation capacitor (0.1 μF)

C5 Power supply compensation capacitor (0.1 μF)

C6 Power supply compensation capacitor (0.1 μF)

C7 Power supply compensation capacitor (1 μF)

CLOAD1 Load capacitor for OUT1 (1 nF)

CLOAD2 Load capacitor for OUT2 (1 nF)

CLOAD3 Load capacitor for OUT3 (1 nF)

CLOAD4 Load capacitor for OUT4 (1 nF)

CLOAD5 Load capacitor for OUT5 (1 nF)

CLOAD6 Load capacitor for OUT6 (1 nF)

GND Ground

INA1 Input/probe pin for INA1

INB1 Input/probe pin for INB1

INA2 Input/probe pin for INA2

INB2 Input/probe pin for INB2

INA3 Input/probe pin for INA3

INB3 Input/probe pin for INB3

INA4 Input/probe pin for INA4

INB4 Input/probe pin for INB4

INA5 Input/probe pin for INA5

INB5 Input/probe pin for INB5

INA6 Input/probe pin for INA6

INB6 Input/probe pin for INB6

NC No connect

OUT1 Unloaded output probe pin for OUT1

OUT2 Unloaded output probe pin for OUT2

OUT3 Unloaded output probe pin for OUT3

OUT4 Unloaded output probe pin for OUT4

Label Description

OUT5 Unloaded output probe pin for OUT5

OUT6 Unloaded output probe pin for OUT6

OUT1_L Loaded output probe pin for OUT1

OUT2_L Loaded output probe pin for OUT2

OUT3_L Loaded output probe pin for OUT3

OUT4_L Loaded output probe pin for OUT4

OUT5_L Loaded output probe pin for OUT5

OUT6_L Loaded output probe pin for OUT6

RA1 First resistor in Gamma String A

RA2 Second resistor in Gamma String A

RA3 Third resistor in Gamma String A

RA4 Fourth resistor in Gamma String A

RA5 Fifth resistor in Gamma String A

RA6 Sixth resistor in Gamma String A

RA7 Seventh resistor in Gamma String A

RB1 First resistor in Gamma String B

RB2 Second resistor in Gamma String B

RB3 Third resistor in Gamma String B

RB4 Fourth resistor in Gamma String B

RB5 Fifth resistor in Gamma String B

RB6 Sixth resistor in Gamma String B

RB7 Seventh resistor in Gamma String B

RLOAD1 Load resistor for OUT1

RLOAD2 Load resistor for OUT2

RLOAD3 Load resistor for OUT3

RLOAD4 Load resistor for OUT4

RLOAD5 Load resistor for OUT5

RLOAD6 Load resistor for OUT6

R1 Pull-up/down resistor for A/B select (100 kΩ)

R2 Pull-down resistor for A/B select (1 MΩ)

SW1 MUX switch for GAMMA A and GAMMA B

VCC Power (+5 V)

ORDERING GUIDE

Model Description

ADD8504-EVAL Evaluation Kit

ADD8505-EVAL Evaluation Kit

ADD8506-EVAL Evaluation Kit

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on

the human body and test equipment and can discharge without detection. Although this product features

proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy

electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance

degradation or loss of functionality.

registered trademarks are the property of their respective owners.

EB05763-0-2/06(0)

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