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| 10-Channel Gamma Buffer with VCOM Driver ADD8710 FEATURES Single-supply operation: 4.5 V to 16.5 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 VS 1 28 27 VS NC NC 2 OUT1 3 OUT2 4 OUT3 5 OUT4 6 OUT5 7 OUT6 8 OUT7 9 OUT8 10 OUT9 11 OUT10 12 OUTCOM 13 GND 14 26 IN1 25 IN2 24 IN3 23 IN4 ADD8710 22 IN5 21 IN6 20 IN7 19 IN8 18 IN9 17 IN10 16 INCOM 15 GND 04889-0-001 04889-0-002 APPLICATIONS TFT LCD monitor panels TFT LCD notebook panels NC = NO CONNECT Figure 1. 28-Lead TSSOP (RU Suffix) GENERAL DESCRIPTION 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 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 VS NC 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 INCOM GND GND Figure 2. 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: 781.326.8703 (c) 2004 Analog Devices, Inc. All rights reserved. ADD8710 TABLE OF CONTENTS Electrical Characteristics ................................................................. 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Typical Performance Characteristics ..............................................5 Outline Dimensions ....................................................................... 10 Ordering Guide .......................................................................... 10 REVISION HISTORY 6/04--Revision 0: Initial Version Rev. 0 | Page 2 of 12 ADD8710 ELECTRICAL CHARACTERISTICS VS = 16 V, VCM = VS/2, TA @ 25C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Input Impedance Input Capacitance BUFFER CHARACTERISTICS Output Voltage High (V1) Symbol VOS VOS/T IB ZIN CIN VOH VS = 16 V, VI = 16 V, IL = 10 mA VS = 10 V, VI = 9.8 V, IL = 10 mA -40C TA +85C VS = 10 V, VI = 8.5 V, IL = 10 mA -40C TA +85C VS = 10 V, VI= 8 V, IL= 10 mA -40C TA +85C VS = 10 V, VI = 2 V, IL = 10 mA -40C TA +85C VS = 10 V, VI = 1.5 V, IL = 10 mA -40C TA +85C VS = 16 V, VI = 0 V, IL = 10 mA VS = 10 V, VI = 0.2 V, IL = 10 mA -40C TA +85C VS = 16 V VS = 10 V, VI = 8 V, IL = 30 mA -40C TA +85C VS = 10 V, VI = 2 V, IL = 30 mA -40C TA +85C VS = 16 V 4.5 70 7.95 7.9 15.82 9.75 9.7 8.45 8.4 7.95 7.9 Condition Applies to all channels -40C TA +85C -40C TA +85C 400 1 15.9 9.8 8.5 8 2 1.5 0.1 0.2 0.3 10 100 8 2 35 250 16.5 90 7.7 10 11.5 2.05 2.10 mA mA V dB mA mA V/s MHz s s Degree dB 2.05 2.10 1.55 1.60 0.175 0.25 Min Typ 4 5 0.5 Max 12 1.1 1.5 Unit mV V/C A A k pF V V V V V V V V V V V V V V mA mA Output Voltage High (V2 to V5) Output Voltage High (V6 to V10) Output Voltage Low (V1 to V5) Output Voltage Low (V6 to V9) Output Voltage Low (V10) VOH VOH VOL VOL VOL Continuous Output Current Peak Output Current VCOM CHARACTERISTICS Output Voltage High Output Voltage Low 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 IOUT IPK VOH VOL IOUT IPK VS PSRR ISY VS = 4.5 V to 16.5 V, -40C TA +85C VO = VS/2, No Load -40C TA +85C 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 SR BW tS tS Oo 4 8 5 1.1 0.7 45 75 Rev. 0 | Page 3 of 12 ADD8710 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage (VS) Input Voltage Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range ESD Tolerance (HBM) ESD Tolerance (MM) Rating 18 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. Package Characteristics Package Type 28-Lead TSSOP (RU) JA1 67.7 Unit C/W 1 JA is specified for worst case conditions, i.e., JA is specified for devices soldered on to a circuit board for surface mount packages. 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. 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 12 ADD8710 TYPICAL PERFORMANCE CHARACTERISTICS 800 700 600 T = 25C VDD = 4.5V TO 16V SUPPLY CURRENT/BUFFER (mA) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 04889-0-003 NUMBER OF UNITS 500 400 300 200 100 0 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 VOS (mV) 3 4 5 6 7 8 0 0 2 4 6 8 10 12 SUPPLY VOLTAGE (V) 14 16 18 Figure 3. Input Offset Voltage Figure 6. Supply Current/Buffer v. Supply Voltage 300 1.0 0.9 SUPPLY CURRENT/BUFFER (mA) 250 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 NUMBER OF UNITS 200 150 100 50 04889-0-004 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 0 -40 -20 0 TCVOS (V/C) 20 40 60 80 TEMPERATURE (C) 100 120 Figure 4. Input Offset Voltage Drift Distribution Figure 7. Supply Current/Buffer vs. Temperature 5 4 INPUT OFFSET VOLTAGE (mV) 3 2 1 0 -1 -2 -3 INPUT BIAS CURRENT (nA) V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 VCOM 600 400 V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 VCOM 200 0 -200 04889-0-005 -4 -40 -400 -40 -20 0 -20 0 60 40 20 TEMPERATURE (C) 80 100 120 80 60 40 20 TEMPERATURE (C) 100 120 Figure 8. Input Bias Current vs. Temperature Figure 5. Input Offset Voltage vs. Temperature Rev. 0 | Page 5 of 12 04889-0-008 04889-0-007 04889-0-006 ADD8710 125 105 95 OUTPUT VOLTAGE (V) 1.0 VIN = 0V V1-V10 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 04889-0-010 75 55 (dB) VCOM 35 15 -5 -25 -45 -65 100 1k 10k 100k 1M 10M 1 10 LOAD CURRENT (mA) 100 FREQUENCY (Hz) Figure 9. Power Supply Rejection Ratio vs. Frequency Figure 12. Chan VCOM Output Voltage Low vs. I Load 2.5 VIN = 0V 2.0 OUTPUT VOLTAGE (V) 16.2 16.0 15.8 15.6 15.4 15.2 15.0 14.8 14.6 14.4 04889-0-011 VIN = 16V OUTPUT VOLTAGE (V) 1.5 1.0 0.5 1 10 LOAD CURRENT (mA) 100 1 10 LOAD CURRENT (mA) 100 Figure 10. Chan 1-5 Output Voltage Low vs. I Load Figure 13. Chan 1 Output Voltage High vs. I Load 1.4 VIN = 0V 1.2 10.00 9.99 VIN = 10V OUTPUT VOLTAGE (V) 0.8 OUTPUT VOLTAGE (V) 1.0 9.98 9.97 0.6 9.96 0.4 9.95 0.2 9.94 9.93 1 10 LOAD CURRENT (mA) 100 04889-0-012 1 10 LOAD CURRENT (mA) 100 Figure 11. Chan 6-10 Output Voltage Low vs. I Load Figure 14. Chan 2-5 Output Voltage High vs. I Load Rev. 0 | Page 6 of 12 04889-0-015 0 04889-0-014 0 14.2 04889-0-013 0 ADD8710 11 RL = 2k CLOAD = 100pF 9 OUTPUT VOLTAGE (V) 7 5 3 1 VIN = 10V 1 10 LOAD CURRENT (mA) 100 04889-0-016 VOLTAGE (4V/DIV) -1 TIME (2s/DIV) Figure 15. Chan 6-10 Output Voltage High vs. I Load Figure 18. Large-Signal Transient Response 10.00 9.99 9.98 OUTPUT VOLTAGE (V) VIN = 10V 20 10 0 40pF -10 1040pF -20 140pF 90pF 9.97 9.96 9.95 9.94 9.93 9.92 9.91 04889-0-017 (dB) -30 -40 -50 -60 -70 510pF 1 10 LOAD CURRENT (mA) 100 1M FREQUENCY (Hz) 10M Figure 16. Chan VCOM Output Voltage High vs. I Load RL = 2k CLOAD = 100pF Figure 19. Chan 1-5 Frequency Response vs. Capacitive Loading 20 10 0 140pF 90pF 40pF -10 -20 1040pF 510pF -30 -40 -50 -60 -70 04889-0-018 VOLTAGE (50mV/DIV) (dB) 1M FREQUENCY (Hz) 10M TIME (2s/DIV) Figure 17. Small-Signal Transient Response Figure 20. Chan 6-10 Frequency Response vs. Capacitive Loading Rev. 0 | Page 7 of 12 04889-0-021 -80 100k 04889-0-020 9.90 -80 100k 04889-0-019 ADD8710 20 140pF 10 90pF 0 40pF -10 1040pF -20 -10 -5 150 5 0 10k 2k 1k 560 10 (dB) (dB) 04889-0-022 510pF -30 -40 -50 -60 -70 -80 100k 1M FREQUENCY (Hz) 10M -15 -20 -25 -30 -35 1M 10M 100M 04889-0-025 04889-0-027 04889-0-026 -40 100k FREQUENCY (Hz) Figure 21. Chan VCOM Frequency Response vs. Capacitive Loading 10 5 0 -5 -10 10k 2k 1k 560 150 Figure 24. Chan VCOM Frequency Response vs. Resistive Loading 750 675 600 525 GAMMA IMPEDANCE () 450 375 300 225 150 75 VCOM (dB) -15 -20 -25 -30 -35 1M 10M 100M 04889-0-023 -40 100k 0 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FREQUENCY (Hz) Figure 22. Chan 1-5 Frequency Response vs. Resistive Loading 10 5 0 -5 150 -10 10k 2k 1k 560 60 70 Figure 25. Closed-Loop Output Impedance vs. Frequency VIN = 100mV p-p AV = 1 RL = 10k 50 OVERSHOOT (%) 40 -OS 30 +OS 20 (dB) -15 -20 -25 -30 10 -35 04889-0-024 -40 100k 1M 10M 100M 0 10 100 CAPACITIVE LOAD (pF) 1000 FREQUENCY (Hz) Figure 23. Chan 6-10 Frequency Response vs. Resistive Loading Figure 26. Chan 1-5 Small Signal Overshoot vs. Load Capacitance Rev. 0 | Page 8 of 12 ADD8710 70 60 VIN = 100mV p-p AV = 1 RL = 10k 60 VIN = 100mV p-p AV = 1 RL = 10k 50 -OS +OS 50 OVERSHOOT (%) 40 -OS +OS OVERSHOOT (%) 04889-0-028 40 30 30 20 20 10 10 100 CAPACITIVE LOAD (pF) 1000 100 CAPACITIVE LOAD (pF) 1000 Figure 27. Chan 6-10 Small Signal Overshoot vs. Load Capacitance Figure 28. Chan VCOM Small Signal Overshoot vs. Load Capacitance Rev. 0 | Page 9 of 12 04889-0-029 0 10 0 10 ADD8710 OUTLINE DIMENSIONS 9.80 9.70 9.60 28 15 4.50 4.40 4.30 6.40 BSC 1 14 PIN 1 0.65 BSC 0.15 0.05 COPLANARITY 0.10 0.30 0.19 1.20 MAX 8 0 0.75 0.60 0.45 SEATING PLANE 0.20 0.09 COMPLIANT TO JEDEC STANDARDS MO-153AE Figure 29. 28-Lead Thin Shrink Small Outline Package [TSSOP] (RU) Dimensions shown in millimeters ORDERING GUIDE Model ADD8710ARUZ1 ADD8710ARUZ-REEL1 Temperature Range -40C to +85C -40C to +85C Package Description 28-Lead TSSOP 28-Lead TSSOP Package Option RU-28 RU-28 1 Z = Pb-free part. Rev. 0 | Page 10 of 12 ADD8710 NOTES Rev. 0 | Page 11 of 12 ADD8710 NOTES (c) 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04889-0-6/04(0) Rev. 0 | Page 12 of 12 This datasheet has been download from: www..com Datasheets for electronics components. |
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