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| 6-Channel, Muxed Input Line Inversion LCD Gamma Buffer ADD8506 FEATURES Single-supply operation: 3.3 V to 6.5 V Rail-to-rail input, rail-to-rail output High output current: 380 mA Low supply current: 3.9 mA Stable with 1 nF loads Wide temperature range: -40C to +105C 24-lead, Pb-free, TSSOP package PIN CONFIGURATION DIAGRAM INA1 1 INB1 2 INA2 3 INB2 4 INA3 5 INB3 6 INA4 7 INB4 8 24 VCC1 23 OUT1 22 OUT2 21 OUT3 20 VCC2 19 A/B 18 GND 17 GND 16 OUT4 15 OUT5 05549-003 APPLICATIONS LCD line inversion gamma references Car navigation panels Personal media player panels INA5 9 INB5 10 INA6 11 INB6 12 14 OUT6 13 VCC3 GENERAL DESCRIPTION The ADD8506 has 6-channel LCD gamma reference buffers designed to drive column driver gamma inputs in line inversion panels. Each buffer channel has an A/B input to select between two gamma voltage curves. These buffer channels drive the resistor ladders of LCD column drivers for gamma correction. The ADD8506 outputs have high slew rates and output drives that increase the stability of the reference ladder, resulting in optimal gray scale and visual performance. The ADD8506 is specified over the -40C to +105C temperature range. It is available in a 24-lead thin shrink small outline (TSSOP), surface-mount, Pb-free package. Figure 1. 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 Fax: 781.461.3113 (c) 2005 Analog Devices, Inc. All rights reserved. ADD8506 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configuration Diagram ............................................................ 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance .......................................................................4 ESD Performance ..........................................................................4 ESD Caution...................................................................................4 Typical Performance Characteristics ..............................................5 Applications........................................................................................6 Outline Dimensions ..........................................................................7 Ordering Guide .............................................................................7 REVISION HISTORY 9/05--Revision 0: Initial Version Rev. 0 | Page 2 of 8 ADD8506 SPECIFICATIONS ELECTRICAL CHARACTERISTICS VCC = 5 V, TA = 25C, unless otherwise noted. VIN denotes buffer input voltage; ILOAD denotes load current; RL denotes load resistance; CL denotes load capacitance. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Input Common-Mode Voltage Range Input Bias Current Voltage Gain OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Output Resistance Output Short Circuit Current POWER SUPPLY 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 Low Input Voltage High Input Voltage High Symbol VOS VCM IB AVO VOH VOL ROUT ISC ISY VCC SR tS IIL IIH VIL VIL VIH VIH Conditions 0 V VIN 5 V 0 VIN = 2.5 V 0.985 ILOAD = +20 mA ILOAD = -20 mA -20 mA ILOAD +20 mA; 0.5 V VIN 4.5 V 4.75 0.2 120 VIN = 2.5 V 3.3 CL = 15 pF RL = 250 CL = 200 pF, RL = 10 k VIN = 0.0 V VIN = 5.0 V VCC = 5.0 V, -40C TA 105C VCC = 3.3 V, -40C TA 105C VCC = 5.0 V, -40C TA 105C VCC = 3.3 V, -40C TA 105C 7.0 6.2 2.5 0.20 380 3.9 5.1 6.5 2 Min Typ Max 20 5 50 Unit mV V nA V/V V V mA mA V V/s V/s s nA nA V V V V 6 100 100 0.8 0.7 1.7 1.4 Rev. 0 | Page 3 of 8 ADD8506 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Input Voltage Storage Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) Rating 7V GND to VCC -65C to +150C -65C to +150C 300C THERMAL RESISTANCE Table 3. Thermal Package Characteristics Model ADD8506WRUZ 1 2 Package Type 24-Lead Pb-Free TSSOP JA1 128 JC2 45 Unit C/W JA is specified for natural convection on a two-layer board. JC is specified for natural convection on a two-layer board. Stresses beyond 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. ESD PERFORMANCE Table 4. Model ADD8506WRUZ 1 2 HBM 1 3.5 kV MM 2 200 V FICDM 3 1.0 kV Human body model. Machine model. 3 Field induced charge device model. 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. 0 | Page 4 of 8 ADD8506 TYPICAL PERFORMANCE CHARACTERISTICS 5.5 5.0 4.5 VCM = 2.5V TA = 25C 5V SUPPLY CURRENT (mA) 4.0 VCC = 5V TA = 25C INPUT 0V 5V 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 1 2 3 4 5 6 7 05549-004 OUTPUT 0V 0 SUPPLY VOLTAGE (V) CH1 2.00V CH2 2.00V M400ns Figure 2. Supply Current vs. Supply Voltage 1000 Figure 5. Transient Response--Rising OUTPUT VOLTAGE TO SUPPLY RAIL (mV) VCC = 5V TA = 25C 5V INPUT VCC = 5V TA = 25C 100 0V OUTPUT HIGH 5V OUTPUT OUTPUT LOW 10 0V 0 1 10 100 05549-005 1 LOAD CURRENT (mA) CH1 2.00V CH2 2.00V M400ns Figure 3. Output Voltage to Supply Rail vs. Load Current Figure 6. Transient Response--Falling 6 VCC = 5V VCM = 2.5V 4 CH6 CH2 CH5 VOS (mV) 2 0 CH3 -2 CH1 -4 -6 CH4 -8 -40 0 25 40 80 90 95 100 105 TEMPERATURE (C) Figure 4. Offset Voltage vs. Temperature 05549-006 Rev. 0 | Page 5 of 8 05549-008 05549-007 ADD8506 APPLICATIONS The ADD8506 has CMOS buffers with A/B inputs 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 the use of a very large resistor ladder to save supply current. The buffer outputs are designed to drive resistive or capacitive loads. Therefore, to attain the best display performance, do not use resistors in series with these outputs. Outputs have high slew rates and 6 s settling times. Each output delivers a minimum of 120 mA, ensuring a fast response to varying loads. 5V 0.1F RA1 RB1 1 24 Power supply pins on the ADD8506 have multiple ground (GND) and supply (VCC) connections. Because of the high peak currents that these buffers deliver, it is recommended that all GND and VCC pins be connected and suitably bypassed. Table 5. MUX Function A/B Select Logic High Logic Low Input INAx INBx VCOM (INVERTING SIGNAL) 0.1F 5V TO COLUMN DRIVERS RA2 RB2 2 23 3 22 RA3 RB3 4 21 5 20 RA4 RB4 6 19 7 18 RA5 RB5 8 17 9 16 RA6 RB6 10 15 11 10 14 RA7 RB7 5V 0.1F 12 13 NOTES 1. RAx RESISTORS ARE USED TO SET POSITIVE INVERSION GAMMA VOLTAGES. 2. RBx RESISTORS ARE USED TO SET NEGATIVE INVERSION GAMMA VOLTAGES. Figure 7. Typical Application Rev. 0 | Page 6 of 8 05549-009 ADD8506 OUTLINE DIMENSIONS 7.90 7.80 7.70 24 13 4.50 4.40 4.30 6.40 BSC 1 12 PIN 1 0.65 BSC 0.15 0.05 0.30 0.19 0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-153-AD 1.20 MAX SEATING PLANE 0.20 0.09 8 0 0.75 0.60 0.45 Figure 8. 24-Lead Thin Shrink Small Outline Package [TSSOP] (RU-24) Dimensions shown in millimeters ORDERING GUIDE Model ADD8506WRUZ 1 ADD8506WRUZ-REEL71 ADD8506WRUZ-REEL1 1 Temperature Range -40C to +105C -40C to +105C -40C to +105C Package Description 24-Lead Thin Shrink Small Outline Package [TSSOP], Tube 24-Lead Thin Shrink Small Outline Package [TSSOP], 7" Reel 24-Lead Thin Shrink Small Outline Package [TSSOP], 13" Reel Package Option RU-24 RU-24 RU-24 Ordering Quantity 96 1,000 2,500 Z = Pb-free part. Rev. 0 | Page 7 of 8 ADD8506 NOTES (c) 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05549-0-9/05(0) Rev. 0 | Page 8 of 8 |
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