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| 9- and 11-Channel, Muxed Input LCD Reference Buffers AD8509/AD8511 FEATURES 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 package FUNCTIONAL BLOCK DIAGRAM INA1 INB1 INA2 INB2 VO2 VO1 INA11 INB11 A/B VO11 03237-001 APPLICATION LCD line inversion gamma references Figure 1. 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. These 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 -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. 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 PIN CONFIGURATIONS 48 47 46 45 44 43 42 41 40 39 NC NC NC NC VCC GND VO1 VO2 VO3 VO4 VCC GND VO5 VO6 VO7 VO8 VO9 GND VCC A/B NC NC NC NC 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 47 46 45 44 43 42 41 40 39 NC VO1 NC NC VCC GND VO2 VO3 VO4 VO5 VCC GND VO6 VO7 VO8 VO9 VO10 GND VCC A/B NC NC VO11 03237-002 AD8509 TOP VIEW (Not to Scale) 38 37 36 35 34 33 32 31 30 29 28 27 26 25 AD8511 TOP VIEW (Not to Scale) 38 37 36 35 34 33 32 31 30 29 28 27 26 25 NC NC = NO CONNECT NC = NO CONNECT Figure 2. AD8509 and AD8511 48-Lead TSSOP (RU Suffix) 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 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) 2005 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 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 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. B | 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 AD8509, VIN = 2.5 V AD8511, 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 6.5 Unit mV nA V/V V mV mA mV mV mA mA V V/s V/s s A A V V ISY ISY VS tS IIL IIH VIL VIH 6 1.0 1.5 0.8 2.0 Rev. B | 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 sec) 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. Table 3. 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 is specified for devices soldered in circuit boards for surface-mount packages. Table 4. 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. B | 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 4 3 -35 03237-003 620mV 2.5V -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 SOURCE OUTPUT VOLTAGE (mV) 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. B | Page 5 of 8 03237-008 03237-007 03237-006 AD8509/AD8511 VS = 5V TA = 25C RL = 250 CL = 15pF 620mV 2.5V Figure 9. Large Signal Transient Response--Falling 03237-009 Rev. B | 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 can deliver 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 of the ground and VCC pins be connected, and that the VCC pins be suitably bypassed. Rev. B | 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-48) 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 2,500-piece reels. Z = Pb-free part. (c) 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03237-0-1/05(B) Rev. B | Page 8 of 8 |
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