6-Channel, Muxed Input Line Inversion LCD Gamma Buffer ADD8506 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: −40°C to +105°C 24-lead, Pb-free, TSSOP package APPLICATIONS LCD line inversion gamma references Car navigation panels Personal media player panels GENERAL DESCRIPTION PIN CONFIGURATION DIAGRAM INA1 1 24 VCC1 INB1 2 23 OUT1 INA2 3 22 OUT2 INB2 4 21 OUT3 INA3 5 20 VCC2 INB3 6 19 A/B INA4 7 18 GND INB4 8 17 GND INA5 9 16 OUT4 INB5 10 15 OUT5 INA6 11 14 OUT6 INB6 12 13 VCC3 05549-003 FEATURES Figure 1. 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 −40°C to +105°C temperature range. It is available in a 24-lead thin shrink small outline (TSSOP), surface-mount, Pb-free package. 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 © 2005 Analog Devices, Inc. All rights reserved. ADD8506 TABLE OF CONTENTS Features .............................................................................................. 1 Thermal Resistance .......................................................................4 Applications....................................................................................... 1 ESD Performance ..........................................................................4 General Description ......................................................................... 1 ESD Caution...................................................................................4 Pin Configuration Diagram ............................................................ 1 Typical Performance Characteristics ..............................................5 Revision History ............................................................................... 2 Applications........................................................................................6 Specifications..................................................................................... 3 Outline Dimensions ..........................................................................7 Electrical Characteristics............................................................. 3 Ordering Guide .............................................................................7 Absolute Maximum Ratings............................................................ 4 REVISION HISTORY 9/05—Revision 0: Initial Version Rev. 0 | Page 2 of 8 ADD8506 SPECIFICATIONS ELECTRICAL CHARACTERISTICS VCC = 5 V, TA = 25°C, 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 Symbol Conditions VOS VCM IB AVO 0 V ≤ VIN ≤ 5 V VOH VOL ROUT ISC ILOAD = +20 mA ILOAD = −20 mA −20 mA ≤ ILOAD ≤ +20 mA; 0.5 V ≤ VIN ≤ 4.5 V ISY VCC VIN = 2.5 V SR Settling Time LOGIC INPUT CHARACTERISTICS Input Current Low Input Current High Input Voltage Low Input Voltage Low Input Voltage High Input Voltage High tS CL = 15 pF RL = 250 Ω CL = 200 pF, RL = 10 kΩ IIL IIH VIL VIL VIH VIH VIN = 0.0 V VIN = 5.0 V VCC = 5.0 V, −40°C ≤ TA ≤ 105°C VCC = 3.3 V, −40°C ≤ TA ≤ 105°C VCC = 5.0 V, −40°C ≤ TA ≤ 105°C VCC = 3.3 V, −40°C ≤ TA ≤ 105°C Min Typ Max Unit 2 20 5 50 mV V nA V/V 0 VIN = 2.5 V 0.985 4.75 0.2 120 0.20 380 3.9 3.3 Rev. 0 | Page 3 of 8 7.0 6.2 2.5 5.1 6.5 mA V 6 V/μs V/μs μs 100 100 0.8 0.7 1.7 1.4 V V Ω mA nA nA V V V V ADD8506 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Input Voltage Storage Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) THERMAL RESISTANCE Rating 7V GND to VCC −65°C to +150°C −65°C to +150°C 300°C 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. Table 3. Thermal Package Characteristics Model ADD8506WRUZ 1 2 Package Type 24-Lead Pb-Free TSSOP θJA1 128 θJC2 45 θJA is specified for natural convection on a two-layer board. θJC is specified for natural convection on a two-layer board. ESD PERFORMANCE Table 4. Model ADD8506WRUZ HBM 1 3.5 kV MM 2 200 V 1 Human body model. Machine model. 3 Field induced charge device model. 2 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 FICDM 3 1.0 kV Unit °C/W ADD8506 TYPICAL PERFORMANCE CHARACTERISTICS 5.5 VCM = 2.5V TA = 25°C 5.0 5V SUPPLY CURRENT (mA) 4.5 VCC = 5V TA = 25°C 4.0 INPUT 3.5 0V 3.0 5V 2.5 2.0 1.5 OUTPUT 0V 1.0 0 1 2 3 4 5 7 6 SUPPLY VOLTAGE (V) CH1 2.00V Figure 2. Supply Current vs. Supply Voltage CH2 2.00V 05549-007 0 05549-004 0.5 M400ns Figure 5. Transient Response—Rising VCC = 5V TA = 25°C 5V INPUT 0V 5V OUTPUT HIGH OUTPUT OUTPUT LOW 10 0 1 10 100 LOAD CURRENT (mA) CH1 2.00V Figure 3. Δ Output Voltage to Supply Rail vs. Load Current VCC = 5V VCM = 2.5V 4 CH6 CH2 CH5 0 CH3 –2 CH1 –4 –40 0 25 40 80 90 95 TEMPERATURE (°C) 100 105 05549-006 –6 CH4 –8 M400ns Figure 6. Transient Response—Falling 6 2 CH2 2.00V Figure 4. Offset Voltage vs. Temperature Rev. 0 | Page 5 of 8 05549-008 0V 1 VOS (mV) VCC = 5V TA = 25°C 100 05549-005 Δ OUTPUT VOLTAGE TO SUPPLY RAIL (mV) 1000 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. 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. 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 μs settling times. Each output delivers a minimum of 120 mA, ensuring a fast response to varying loads. A/B Select Logic High Logic Low Table 5. MUX Function VCOM (INVERTING SIGNAL) 5V 0.1μF RA1 Input INAx INBx 5V 0.1μF RB1 RA2 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 10 11 14 12 13 TO COLUMN DRIVERS RB2 RA3 RB3 RA4 RB4 RA5 RB5 RA6 RB6 RA7 RB7 0.1μF 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 5V 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 1.20 MAX SEATING PLANE 0.20 0.09 8° 0° 0.75 0.60 0.45 0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-153-AD 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 −40°C to +105°C −40°C to +105°C −40°C to +105°C 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 Z = Pb-free part. Rev. 0 | Page 7 of 8 Package Option RU-24 RU-24 RU-24 Ordering Quantity 96 1,000 2,500 ADD8506 NOTES © 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