10-Channel Gamma Buffer with VCOM Driver ADD8710 Single-supply operation: 4.5 V to 18 V Upper/lower buffers swing to VS/GND Gamma continuous output current: >10 mA VCOM peak output current: 250 mA Offset voltage: 12 mV Slew rate: 8 V/s Unity gain stable with large capacitive loads Supply current: 700 A per amplifier Compact 28-lead TSSOP Pb-free package Drop-in replacement for BUF11702 APPLICATIONS TFT LCD monitor panels TFT LCD notebook panels PIN CONFIGURATION VS VS 1 28 NC 2 27 NC OUT1 3 26 IN1 OUT2 4 25 IN2 OUT3 5 24 IN3 OUT4 6 23 IN4 OUT5 7 22 IN5 21 IN6 OUT7 9 20 IN7 OUT8 10 19 IN8 OUT9 11 18 IN9 OUT10 12 17 IN10 OUTCOM 13 16 INCOM GND 14 15 GND OUT6 8 ADD8710 NC = NO CONNECT 04889-001 FEATURES Figure 1. 28-Lead TSSOP (RU Suffix) The ADD8710 is a low cost, 10-channel gamma buffer with a VCOM driver that operates from a single supply. The part is designed for high resolution TFT LCD panels and is built on an advanced, high voltage CBCMOS process. The gamma buffers have a high slew rate, minimum 10 mA output current, and a high capacitive load drive capability. The VCOM buffer is capable of delivering 250 mA of peak current and can also drive large capacitive loads. The ADD8710 offers a wide supply range and offset voltages below 12 mV. The ADD8710 is specified over the -40C to +85C temperature range and is available in a Pb-free, 28-lead TSSOP package. FUNCTIONAL BLOCK DIAGRAM VS ADD8710 NC VS NC OUT1 1 IN1 OUT2 2 IN2 OUT3 3 IN3 OUT4 4 IN4 OUT5 5 IN5 OUT6 6 IN6 OUT7 7 IN7 OUT8 8 IN8 OUT9 9 IN9 OUT10 10 IN10 OUTCOM VCOM GND INCOM GND 04889-002 GENERAL DESCRIPTION Figure 2. 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: 781.461.3113 (c)2004-2007 Analog Devices, Inc. All rights reserved. ADD8710 TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................4 Applications....................................................................................... 1 Thermal Resistance .......................................................................4 General Description ......................................................................... 1 ESD Caution...................................................................................4 Pin Configuration............................................................................. 1 Typical Performance Characteristics ..............................................5 Functional Block Diagram .............................................................. 1 Outline Dimensions ....................................................................... 10 Revision History ............................................................................... 2 Ordering Guide .......................................................................... 10 Specifications..................................................................................... 3 REVISION HISTORY 6/07--Rev. A to Rev. B Changes to Figure 18........................................................................ 7 3/05--Rev. 0 to Rev. A Change to Features ........................................................................... 1 Changes to Specifications ................................................................ 3 Change to Absolute Maximum Ratings......................................... 4 6/04--Revision 0: Initial Version Rev. B | Page 2 of 12 ADD8710 SPECIFICATIONS VS = 16 V, VCM = VS/2, TA @ 25C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Symbol VOS VOS/T IB Condition Applies to all channels Min -40C TA +85C Typ Max Unit 4 5 0.5 12 mV V/C A A k pF -40C TA +85C Input Impedance Input Capacitance BUFFER CHARACTERISTICS Common-Mode Input Range Buffer 1 to Buffer 5 Buffer 6 to Buffer 10 Output Voltage High (V1) ZIN CIN VOH VOH Output Voltage High (V6 to V10) VOH Output Voltage Low (V1 to V5) VOL Output Voltage Low (V6 to V9) VOL Output Voltage Low (V10) VOL Continuous Output Current Peak Output Current VCOM CHARACTERISTICS Common-Mode Input Range Output Voltage High IOUT IPK Continuous Output Current Peak Output Current SUPPLY CHARACTERISTICS Supply Voltage Power Supply Rejection Ratio Total Supply Current DYNAMIC PERFORMANCE Slew Rate Bandwidth Settling Time to 0.1% (Buffers) Settling Time to 0.1% (VCOM) Phase Margin Channel Separation 400 1 VCMM Output Voltage High (V2 to V5) Output Voltage Low 1.1 1.5 VCMM VOH VOL IOUT IPK VS PSRR ISY SR BW tS tS O VS = 16 V, VIN = 16 V, IL = 10 mA VS = 10 V, VIN = 9.8 V, IL = 10 mA -40C TA +85C VS = 10 V, VIN = 8.5 V, IL = 10 mA -40C TA +85C VS = 10 V, VIN = 8 V, IL = 10 mA -40C TA +85C VS = 10 V, VIN = 2 V, IL = 10 mA -40C TA +85C VS = 10 V, VIN = 1.5 V, IL = 10 mA -40C TA +85C VS = 16 V, VIN = 0 V, IL = 10 mA VS = 10 V, VIN = 0.2 V, IL = 10 mA -40C TA +85C 1.25 0 15.82 9.75 9.7 8.45 8.4 7.95 7.9 RL = 2 k, CL = 200 pF -3 dB, RL = 10 k, CL = 200 pF 1 V step, RL = 10 k, CL = 200 pF 1 V step, RL = 10 k, CL = 200 pF RL = 10 k, CL = 200 pF Rev. B | Page 3 of 12 8.5 8 1.5 0.1 0.2 0.3 10 100 0 7.95 7.9 2.05 2.10 1.55 1.60 0.175 0.25 VS - 1.25 8 2 2.05 2.10 35 250 VS = 16 V VS = 4.5 V to 16.5 V, -40C TA +85C VO = VS/2, no load -40C TA +85C 15.9 9.8 2 VS = 16 V VS = 10 V, VIN = 8 V, IL = 30 mA -40C TA +85C VS = 10 V, VIN = 2 V, IL = 30 mA -40C TA +85C VS VS - 1.25 4.5 70 4 18 90 7.7 8 5 1.1 0.7 45 75 10 11.5 V V V V V V V V V V V V V V V V mA mA V V V V V mA mA V dB mA mA V/s MHz s s Degrees dB ADD8710 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 2. Parameter Supply Voltage (VS) Input Voltage Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature ESD Tolerance (HBM) ESD Tolerance (MM) JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Rating 18.5 V -0.5 V to VS + 0.5 V -65C to +150C -40C to +85C -65C to +150C 300C 2500 V 200 V Table 3. Thermal Resistance Package Type 28-Lead TSSOP (RU) ESD CAUTION 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 sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Rev. B | Page 4 of 12 JA 67.7 Unit C/W ADD8710 TYPICAL PERFORMANCE CHARACTERISTICS 800 0.7 T = 25C VS = 4.5V TO 16V SUPPLY CURRENT/BUFFER (mA) 700 500 400 300 200 0.5 0.4 0.3 0.2 0.1 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 VOS (mV) 3 4 5 6 7 8 04889-003 100 0 0.6 0 0 2 4 6 8 10 12 SUPPLY VOLTAGE (V) 14 16 18 04889-006 NUMBER OF UNITS 600 Figure 6. Supply Current/Buffer vs. Supply Voltage Figure 3. Input Offset Voltage Distribution 1.0 300 0.9 SUPPLY CURRENT/BUFFER (mA) NUMBER OF UNITS 250 200 150 100 50 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 -40 2 INPUT BIAS CURRENT (nA) 3 20 40 60 80 TEMPERATURE (C) 100 V1 V2 V3 V4 V5 V6 600 1 0 -1 -2 120 400 V7 V8 V9 V10 VCOM 200 0 -200 -4 -40 -20 0 80 60 40 20 TEMPERATURE (C) 100 120 -400 -40 Figure 5. Input Offset Voltage vs. Temperature -20 0 80 60 40 20 TEMPERATURE (C) 100 Figure 8. Input Bias Current vs. Temperature Rev. B | Page 5 of 12 120 04889-008 -3 04889-005 INPUT OFFSET VOLTAGE (mV) V7 V8 V9 V10 VCOM V1 V2 V3 V4 V5 V6 4 0 Figure 7. Supply Current/Buffer vs. Temperature Figure 4. Input Offset Voltage Drift Distribution 5 -20 04889-007 TCVOS (V/C) 04889-004 0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 0.1 ADD8710 1.0 125 105 0.8 95 35 15 -5 0.6 0.5 0.4 0.3 -25 0.2 -45 0.1 1k 10k 100k 1M 10M FREQUENCY (Hz) 0 04889-009 -65 100 1 10 100 LOAD CURRENT (mA) 04889-012 VCOM 55 (dB) 0.7 OUTPUT VOLTAGE (V) 75 Figure 12. Channel VCOM Output Voltage Low vs. Load Current Figure 9. Power Supply Rejection Ratio vs. Frequency 16.2 2.5 VIN = 0V VIN = 16V 16.0 15.8 2.0 15.6 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) VIN = 0V 0.9 V1-V10 1.5 1.0 15.4 15.2 15.0 14.8 14.6 0.5 10 100 LOAD CURRENT (mA) 14.2 04889-010 1 9.99 1.0 9.98 OUTPUT VOLTAGE (V) 0.6 0.4 VIN = 10V 9.97 9.96 9.95 9.94 0.2 10 LOAD CURRENT (mA) 100 9.93 04889-011 1 Figure 11. Channel 6 to Channel 10 Output Voltage Low vs. Load Current 1 10 LOAD CURRENT (mA) 100 04889-014 OUTPUT VOLTAGE (V) 10.00 VIN = 0V 0.8 100 Figure 13. Channel 1 Output Voltage High vs. Load Current 1.2 0 10 LOAD CURRENT (mA) Figure 10. Channel 1 to Channel 5 Output Voltage Low vs. Load Current 1.4 1 04889-013 14.4 0 Figure 14. Channel 2 to Channel 5 Output Voltage High vs. Load Current Rev. B | Page 6 of 12 ADD8710 11 RL = 2k CL = 100pF VOLTAGE (2V/DIV) OUTPUT VOLTAGE (V) 9 7 5 3 1 10 100 LOAD CURRENT (mA) TIME (2s/DIV) Figure 18. Large Signal Transient Response Figure 15. Channel 6 to Channel 10 Output Voltage High vs. Load Current 10.00 04889-018 1 04889-015 VIN = 10V -1 20 VIN = 10V 9.99 10 9.98 0 9.97 -10 9.96 -20 140pF 90pF -40 9.93 -50 9.92 -60 9.91 -70 10 100 LOAD CURRENT (mA) -80 100k Figure 16. Channel VCOM Output Voltage High vs. Load Current 1M 10M FREQUENCY (Hz) Figure 19. Channel 1 to Channel 5 Frequency Response vs. Capacitive Loading 20 RL = 2k CL = 100pF 10 140pF 90pF 0 VOLTAGE (50mV/DIV) 40pF -10 1040pF (dB) -20 510pF -30 -40 -50 -60 -70 Figure 17. Small Signal Transient Response 04889-017 TIME (2s/DIV) -80 100k 1M FREQUENCY (Hz) 10M 04889-020 1 510pF -30 9.94 9.90 1040pF 04889-019 (dB) 9.95 04889-016 OUTPUT VOLTAGE (V) 40pF Figure 20. Channel 6 to Channel 10 Frequency Response vs. Capacitive Loading Rev. B | Page 7 of 12 ADD8710 20 10 140pF 10 5 90pF 0 40pF -10 1040pF -20 -50 -25 -60 -30 -70 -35 1M 10M -40 100k 1M 10M 100M FREQUENCY (Hz) Figure 21. Channel VCOM Frequency Response vs. Capacitive Loading 04889-024 (dB) -15 -40 04889-021 Figure 24. Channel VCOM Frequency Response vs. Resistive Loading 10 750 5 2k 10k 1k 0 -5 675 560 600 525 IMPEDANCE () 150 -10 -15 -20 375 300 -25 225 -30 150 -35 75 10M 100M FREQUENCY (Hz) VCOM 0 100 04889-022 1M GAMMA 450 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 22. Channel 1 to Channel 5 Frequency Response vs. Resistive Loading 04889-025 (dB) 510pF -30 FREQUENCY (Hz) (dB) 150 -10 -80 100k Figure 25. Closed-Loop Output Impedance vs. Frequency 10 70 2k 10k 5 60 1k 560 0 VIN = 100mV p-p AV = 1 RL = 10k 50 -5 OVERSHOOT (%) 150 -10 (dB) 2k 1k 560 -5 -20 -40 100k 10k 0 -15 -20 -25 40 -OS 30 +OS 20 -30 1M 10M FREQUENCY (Hz) 100M 0 10 04889-023 -40 100k Figure 23. Channel 6 to Channel 10 Frequency Response vs. Resistive Loading 100 CAPACITIVE LOAD (pF) 1000 04889-026 10 -35 Figure 26. Channel 1 to Channel 5 Small Signal Overshoot vs. Load Capacitance Rev. B | Page 8 of 12 ADD8710 60 70 60 VIN = 100mV p-p AV = 1 RL = 10k 50 VIN = 100mV p-p AV = 1 RL = 10k -OS -OS 40 30 +OS +OS 40 OVERSHOOT (%) OVERSHOOT (%) 50 30 20 20 100 CAPACITIVE LOAD (pF) 1000 0 10 04889-027 0 10 Figure 27. Channel 6 to Channel 10 Small Signal Overshoot vs. Load Capacitance 100 1000 CAPACITIVE LOAD (pF) Figure 28. Channel VCOM Small Signal Overshoot vs. Load Capacitance Rev. B | Page 9 of 12 04889-028 10 10 ADD8710 OUTLINE DIMENSIONS 9.80 9.70 9.60 28 15 4.50 4.40 4.30 1 6.40 BSC 14 PIN 1 0.65 BSC 0.15 0.05 COPLANARITY 0.10 0.30 0.19 1.20 MAX SEATING PLANE 0.20 0.09 8 0 0.75 0.60 0.45 COMPLIANT TO JEDEC STANDARDS MO-153-AE Figure 29. 28-Lead Thin Shrink Small Outline Package [TSSOP] (RU-28) Dimensions shown in millimeters ORDERING GUIDE Model ADD8710ARUZ 1 ADD8710ARUZ-REEL1 1 Temperature Range -40C to +85C -40C to +85C Package Description 28-Lead TSSOP 28-Lead TSSOP Z = RoHS Compliant Part. Rev. B | Page 10 of 12 Package Option RU-28 RU-28 ADD8710 NOTES Rev. B | Page 11 of 12 ADD8710 NOTES (c)2004-2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04889-0-6/07(B) Rev. B | Page 12 of 12