ANALOG DEVICES AD8509 Service Manual

9- and 11-Channel, Muxed Input

LCD Reference Buffers

AD8509/AD8511

FEATURES PIN CONFIGURATIONS

Single-supply operation: 3.3 V to 6.5 V High output current: 300 mA Low supply current: 6 mA Stable with 1000 pF loads Pin compatible with LMC6009 Pin compatible with CL-FP6131 48-lead, Pb-free TSSOP/LFCSP packages

APPLICATION

LCD line inversion gamma references

GENERAL DESCRIPTION

The AD8509 and AD8511 are 9-channel and 11-channel LCD reference buffers, respectively, designed to drive 64 gray scale column drivers. Each buffer has an A/B input to select between two voltages for LCD displays. These buffers drive the resistor ladders of LCD column drivers for gamma correction. The LCD drivers have higher slew rates and higher output drive currents than similar competitive parts. This increases the stability of the reference ladder, resulting in better gray scale and visual performance.

The AD8509 and AD8511 are specified over the −40°C to +85°C temperature range. They are available in 48-lead, Pb-free TSSOP packages in tape and reel. Additionally, the ADD8511 is available in a 48-lead, Pb-free LFCSP package.

INA1

INB1

INA2

INB2

INA3

INB3

INA4

INB4

INA5

INB5

INA6

INB6

INA7

INB7

INA8

INB8

INA9

INB9

GND

VO1

VO2

AD8509

TOP VIEW

(Not to Scale)

NC = NO CO NNECT

VO3

VO4

GND

VO5

VO6

VO7

VO8

VO9

GND

A/B

Figure 2. AD8509 and AD8511 48-Lead TSSOP (RV Suffix)

NCNCINB2

INA2

4847464544434241403938

INB1

INA1

INB1

INA2

INB2

INA3

INB3

INA4

INB4

INA5

INB5

INA6

INB6

INA7

INB7

INA8

INB8

INA9

INB9

INA10

INB10

INA11

INB11

INA1NCVO1

AD8511

TOP VIEW

(Not to Scale)

NC = NO CO NNECT

GNDNCNC

VO1

GND

VO2

VO3

VO4

VO5

GND

VO6

VO7

VO8

VO9

VO10

GND

A/B

VO11

03237-012

FUNCTIONAL BLOCK DIAGRAM

INA1

INB1

INA2

INB2

INA11

INB11

A/B

Figure 1.

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her 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.

VO1

VO2

VO11

03237-001

INA3

INB3

INA4

INB4

INA5

INB5

INA6

INB6

INA7

INB7

INA8

INB8

NC = NO CONNECT

PIN 1 INDICATOR

AD8511

TOP VIEW

(Not to Scale)

13141516171819

INA9

INB9

INA11NCINB11

INA10

INB10

2021222324

A/B

VO11

Figure 3. AD8511 48-Lead LFCSP

VO236

VO3

VO4

VO5

GND

VO6

VO7

VO8

VO9

VO10

GND

03237-011

AD8509/AD8511

TABLE OF CONTENTS

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

Application ........................................................................................ 1

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

Functional Block Diagram .............................................................. 1

Pin Configurations ........................................................................... 1

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

Specifications..................................................................................... 3

Electrical Characteristics ............................................................. 3

REVISION HISTORY

2/06—Rev. C

Added LFCSP Package.......................................................Universal

Added Pin Configurations and Function Descriptions Section... 5

Updated Outline Dimensions ........................................................ 9

Changes to Ordering Guide............................................................ 9

1/05—Rev. A to Rev. B

Changed Maximum Operating Voltage...........................Universal

Change to Features List.................................................................... 1

Changes to Specifications Table...................................................... 3

Changes to Ordering Guide............................................................ 8

Absolute Maximum Ratings ............................................................4

Thermal Resistance.......................................................................4

ESD Caution...................................................................................4

Pin Configurations and Function Descriptions............................5

Typical Performance Characteristics..............................................6

Applications........................................................................................8

Outline Dimensions..........................................................................9

Ordering Guide .............................................................................9

9/04—Rev. 0 to Rev. A

Format Updated.................................................................. Universal

Added Pb-Free Part............................................................Universal

Changed Temperature Range............................................Universal

Changed Applications Section.........................................................1

Changes to Ordering Guide.............................................................8

10/97—Revision 0: Initial Version

Rev. C | Page 2 of 12

AD8509/AD8511

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

VS = 5 V, TA = 25°C, unless otherwise noted.

Table 1.

Parameter Symbol Conditions Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage VOS 20 mV Input Bias Current IB 50 nA Voltage Gain AVO 0.985 V/V

OUTPUT CHARACTERISTICS

Output Voltage High VOH I Output Voltage Low VOL I Output Short-Circuit Current ISC 120 350 mA

POWER SUPPLY

Load Regulation VIN = 0.5 V to 4.5 V, I V Supply Current ISY AD8509, VIN = 2.5 V 8.5 mA I

AD8511, VIN = 2.5 V 10 mA

Supply Voltage Range VS 3.3 6.5 V

DYNAMIC PERFORMANCE

Slew Rate CL = 15 pF 7 V/μs R Settling Time tS IDC = 13 mA (sink/source) 3 6 μs

LOGIC INPUT CHARACTERISTICS

Input Current Low IIL 1.0 μA Input Current High IIH 1.5 μA Input Voltage Low VIL 0.8 V Input Voltage High VIH 2.0 V

= +20 mA 4.8 V

LOAD

= −20 mA 200 mV

LOAD

= 20 mA 7 mV

SOURCE

= 0.5 V to 4.5 V, I

= 250 Ω 6.2 V/μs

= 20 mA 7 mV

SINK

Rev. C | Page 3 of 12

AD8509/AD8511

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltage 7 V Input Voltage GND to VS Storage Temperature Range

TSSOP (RV-48)

Operating Temperature Range

Junction Temperature Range

TSSOP (RV-48) Package

Lead Temperature Range

(Soldering, 60 sec) 300°C

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

−65°C to +150°C

−40°C to +85°C

−65°C to +150°C

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages.

Table 3. Thermal Resistance

Package Type θJA θJC Unit

48-Lead, Pb-Free SSOP (RV-48) 115 42 °C/W 48-Lead, Pb-Free LFCSP (CP-48-1) 125 29 °C/W

Table 4. MUX Function

A/B Select Input

Logic High INAx Logic Low INBx

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.

Rev. C | Page 4 of 12

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