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9- and 11-Channel, Muxed Input LCD Reference Buffers AD8509/AD8511
FEATURES
Single-supply operation: 3.3 V to 5.5 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 package
FUNCTIONAL BLOCK DIAGRAM
INA1 INB1 INA2 INB2 VO2 VO1
INA11 INB11 A/B VO11
03237-001
APPLICATIONS
LCD line inversion gamma references
Figure 1.
GENERAL DESCRIPTION
The AD8509 is a 9-channel (AD8511 an 11-channel) LCD reference buffer designed to drive 64 gray scale column drivers. Each buffer has an A/B input used to select between two voltages for LCD displays. These buffers are used to drive the resistor ladders of LCD column drivers for gamma correction. These LCD drivers have higher slew rates and output drive current 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 -40C to +85C temperature range. They are available in 48-lead thin shrink small outline (TSSOP) surface-mount Pb-free packages in tape and reel.
PIN CONFIGURATIONS
NC 1 NC 2 NC 3 INA1 4 INB1 5 INA2 6 INB2 7 INA3 8 INB3 9 INA4 10 INB4 11 INA5 12 INB5 13 INA6 14 INB6 15 INA7 16 INB7 17 INA8 18 INB8 19 INA9 20 INB9 21 NC 22 NC 23 NC 24
48 NC 47 NC 46 NC 45 NC 44 VCC 43 GND 42 VO1 41 VO2 40 VO3 39 VO4
NC 1 INA1 2 INB1 3 INA2 4 INB2 5 INA3 6 INB3 7 INA4 8 INB4 9 INA5 10 INB5 11 INA6 12 INB6 13 INA7 14 INB7 15 INA8 16 INB8 17 INA9 18 INB9 19 INA10 20 INB10 21 NC 22 INA11 23 INB11 24
48 NC 47 VO1 46 NC 45 NC 44 VCC 43 GND 42 VO2 41 VO3 40 VO4 39 VO5
AD8509
TOP VIEW (Not to Scale)
38 VCC 37 GND 36 VO5 35 VO6 34 VO7 33 VO8 32 VO9 31 GND 30 VCC 29 A/B 28 NC 27 NC 26 NC 25 NC
AD8511
TOP VIEW (Not to Scale)
38 VCC 37 GND 36 VO6 35 VO7 34 VO8 33 VO9 32 VO10 31 GND 30 VCC 29 A/B 28 NC 27 NC 26 VO11
03237-002
25 NC
NC = NO CONNECT
NC = NO CONNECT
Figure 2. AD8509 and AD8511 48-Lead TSSOP (RU Suffix)
Rev. A
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 Fax: 781.326.8703 (c) 2004 Analog Devices, Inc. All rights reserved.
AD8509/AD8511 TABLE OF CONTENTS
Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Typical Performance Characteristics ............................................. 5 Applications....................................................................................... 7 Outline Dimensions ......................................................................... 8 Ordering Guide............................................................................. 8
REVISION HISTORY
9/04--Changed from Rev. 0 to Rev. A Format Updated..................................................................Universal Added Pb-free part.............................................................Universal Changed Temperature Range............................................Universal Changed Applications Section........................................................ 1 Updated Ordering Guide................................................................. 8 10/97--Revision 0: Initial Version
Rev. A | Page 2 of 8
AD8509/AD8511 SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VS = 5 V, TA = 25C, unless otherwise noted. Table 1.
Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Voltage Gain OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Output Short Circuit Current POWER SUPPLY Load Regulation Supply Current Supply Voltage Range DYNAMIC PERFORMANCE Slew Rate Settling Time LOGIC INPUT CHARACTERISTICS Input Current Low Input Current High Input Voltage Low Input Voltage High Symbol VOS IB AVO VOH VOL ISC ILOAD = +20 mA ILOAD = -20 mA Conditions Min Typ Max 20 50 0.985 4.8 200 120 VIN = 0.5 V - 4.5 V, ISOURCE = 20 mA VIN = 0.5 V - 4.5 V, ISINK = 20 mA ISY, VIN = 2.5 V ISY, VIN = 2.5 V 3.3 CL = 15 pF RL = 250 IDC = 13 mA (sink/source) 7 6.2 3 350 7 7 8.5 10 5.5 Unit mV nA V/V V mV mA mV mV mA mA V V/s V/s s A A V V
LCD09 LCD11 VS
tS IIL IIH VIL VIH
6 1.0 1.5 0.8
2.0
Rev. A | Page 3 of 8
AD8509/AD8511 ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Supply Voltage Input Voltage Storage Temperature Range RU Package Operating Temperature Range Junction Temperature Range RU Package Lead Temperature Range (Soldering, 60 s) Rating 7V GND to VS -65C to +150C -40C to +85C -65C to +150C 300C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; the functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Package Type 48-Lead Pb-free TSSOP (RU)
JA1 115
JC 42
Unit C/W
1
JA is specified for the worst-case conditions, that is, JA specified for device soldered in circuit board for surface-mount packages.
Table 3. MUX Function
A/B Select (Pin 29) Logic High Logic Low Input INAx 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. A | Page 4 of 8
AD8509/AD8511 TYPICAL PERFORMANCE CHARACTERISTICS
10 VS = 5V RL = NO LOAD 9
VS = 5V TA = 25C RL = NO LOAD CL = 15pF
SUPPLY CURRENT (mA)
8
7 6 5
03237-003
620mV
2.5V
3 -35
-15
5
25
45
65
85
105
TEMPERATURE (C)
Figure 3. Supply Current vs. Temperature
Figure 6. Large Signal Transient Response--Rising
10 9 8 VS = 5V TA = 25C RL = NO LOAD
VS = 5V TA = 25C RL = NO LOAD CL = 15pF
SUPPLY CURRENT (mA)
7 6 AD8511 5 AD8509 4 3 2 1 0 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V)
03237-004
620mV
2.5V
Figure 4. Supply Current vs. Common-Mode Voltage
Figure 7. Large Signal Transient Response--Falling
1k
VS = 5V TA = 25C
VS = 5V TA = 25C RL = 250 CL = 15pF
OUTPUT VOLTAGE (mV)
SOURCE 100
SINK
10
03237-005
620mV
2.5V
1 0.1
1
10
100
LOAD CURRENT (mA)
Figure 5. Output Voltage to Supply Rail vs. Load Current
Figure 8. Large Signal Transient Response--Rising
Rev. A | Page 5 of 8
03237-008
03237-007
03237-006
4
AD8509/AD8511
VS = 5V TA = 25C RL = 250 CL = 15pF
620mV
2.5V
Figure 9. Large Signal Transient Response--Falling
03237-009
Rev. A | Page 6 of 8
AD8509/AD8511 APPLICATIONS
The AD8509 and AD8511 are CMOS buffers with A/B inputs, which are used to select between two different reference voltages set up by an external resistor ladder. Input bias currents are orders of magnitude less than competitive parts. This allows very large resistor ladders to be used to save supply current. A guaranteed value of 50 nA is much higher than actual values and is limited by leakage in the test system. Buffer outputs are designed to drive resistive loads. They are also stable with capacitive loads, so no resistors should be used in series with these outputs to attain the best display performance. Outputs have high slew rates and 6 s settling times. Each output is capable of delivering a minimum of 120 mA, assuring fast response to varying loads. The AD8509 is a 9-channel buffer and is similar to the LMC6009 in functionality. The AD8511 is an 11-channel buffer similar to the CL-FP6131. However, the control to select either 9- or 11-channel operation, the EN_11 pin of the CL-FP6131, is not available on the AD8511. If 9-channel operation is desired, use the AD8509. Power supply pins on the AD8509 and AD8511 have multiple ground and VCC connections. Because of the high peak currents that these buffers can deliver, it is strongly recommended that all be connected, and that the VCC pins be suitably bypassed.
Rev. A | Page 7 of 8
AD8509/AD8511 OUTLINE DIMENSIONS
12.60 12.50 12.40
48
25
6.20 6.10 6.00 8.10 BSC
1 24
PIN 1
1.20 MAX 0.15 0.05 0.50 BSC 0.27 0.17 SEATING PLANE 0.20 0.09 8 0
0.75 0.60 0.45
COMPLIANT TO JEDEC STANDARDS MO-153ED
Figure 10. 48-Lead Thin Shrink Small Outline Package [TSSOP] (RU) Dimensions shown in millimeters
ORDERING GUIDE
Model1 AD8509ARU-REEL AD8509ARUZ-REEL2 AD8511ARU-REEL AD8511ARUZ-REEL2 Temperature Range -40C to +85C -40C to +85C -40C to +85C -40C to +85C Package Description 48-Lead Thin Shrink Small Outline Package 48-Lead Thin Shrink Small Outline Package 48-Lead Thin Shrink Small Outline Package 48-Lead Thin Shrink Small Outline Package Package Option RU-48 RU-48 RU-48 RU-48
1 2
All models only available in 2,000-piece reels. Z = Pb-free part.
(c) 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03237-0-9/04(A)
Rev. A | Page 8 of 8

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