10-Channel Gamma Buffer with VCOM Driver ADD8710 VS 1 28 VS NC 2 27 NC OUT1 3 26 IN1 OUT2 4 25 IN2 OUT3 5 24 IN3 OUT4 6 23 IN4 OUT5 7 OUT6 8 ADD8710 TFT LCD monitor panels TFT LCD notebook panels 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 −40°C to +85°C temperature range and is available in a Pb-free 28-lead TSSOP package. 21 IN6 OUT7 9 20 IN7 OUT8 10 19 IN8 OUT9 11 18 IN9 OUT10 12 17 IN10 OUTCOM 13 16 INCOM GND 14 APPLICATIONS 22 IN5 15 GND NC = NO CONNECT 04889-0-001 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/µs Unity gain stable with large capacitive loads Supply current: 700 µA per amplifier Compact 28-lead TSSOP Pb-free package Drop-in replacement for BUF11702 Figure 1. 28-Lead TSSOP (RU Suffix) 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 04889-0-002 FEATURES 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 © 2004 Analog Devices, Inc. All rights reserved. ADD8710 TABLE OF CONTENTS Electrical Characteristics ................................................................. 3 Typical Performance Characteristics ..............................................5 Absolute Maximum Ratings............................................................ 4 Outline Dimensions ....................................................................... 10 ESD Caution.................................................................................. 4 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 @ 25°C, 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 –40°C ≤ TA ≤ +85°C Typ Max Unit 4 5 0.5 12 mV µV/°C µA µA kΩ pF –40°C ≤ TA ≤ +85°C Input Impedance Input Capacitance BUFFER CHARACTERISTICS Output Voltage High (V1) ZIN CIN VOH Output Voltage High (V2 to V5) 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 Output Voltage High IOUT IPK 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 VOH VOL IOUT IPK VS PSRR ISY SR BW tS tS Øo 1.1 1.5 400 1 VS = 16 V, VI = 16 V, IL = 10 mA VS = 10 V, VI = 9.8 V, IL = 10 mA –40°C ≤ TA ≤ +85°C VS = 10 V, VI = 8.5 V, IL = 10 mA –40°C ≤ TA≤ +85°C VS = 10 V, VI= 8 V, IL= 10 mA –40°C ≤ TA≤ +85°C VS = 10 V, VI = 2 V, IL = 10 mA −40°C ≤ TA≤ +85°C VS = 10 V, VI = 1.5 V, IL = 10 mA –40°C ≤ TA ≤ +85°C VS = 16 V, VI = 0 V, IL = 10 mA VS = 10 V, VI = 0.2 V, IL = 10 mA –40°C ≤ TA ≤ +85°C 15.82 9.75 9.7 8.45 8.4 7.95 7.9 RL = 2 kΩ, CL = 200 pF –3 dB, RL= 10 kΩ, CL = 200 pF 1 V step, RL = 10 kΩ, CL = 200 pF 1 V step, RL = 10 kΩ, CL = 200 pF RL = 10 kΩ, CL = 200 pF Rev. 0 | Page 3 of 12 8 1.5 0.1 0.2 0.3 10 100 7.95 7.9 2.05 2.10 1.55 1.60 0.175 0.25 2.05 2.10 35 250 4.5 70 4 V V V V V V V V V V V V V V mA mA 8 2 VS = 16 V VS = 4.5 V to 16.5 V, –40°C ≤ TA ≤ +85°C VO = VS/2, No Load –40°C ≤ TA ≤ +85°C 8.5 2 VS = 16 V VS = 10 V, VI = 8 V, IL = 30 mA –40°C ≤ TA≤ +85°C VS = 10 V, VI = 2 V, IL = 30 mA –40°C ≤ TA ≤ +85°C 15.9 9.8 mA mA 16.5 90 7.7 8 5 1.1 0.7 45 75 10 11.5 V dB mA mA V/µs MHz µs µs Degree dB ADD8710 ABSOLUTE MAXIMUM RATINGS Table 2. Table 3. Package Characteristics Parameter Supply Voltage (VS) Input Voltage Rating 18 V −0.5 V to VS + 0.5 V Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range ESD Tolerance (HBM) ESD Tolerance (MM) −65°C to +150°C −40°C to +85°C −65°C to +150°C 300°C ±2500 V ±200 V Package Type 28-Lead TSSOP (RU) 1 θJA1 67.7 Unit °C/W θJA is specified for worst case conditions, i.e., θJA 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 0.7 800 T = 25°C VDD = 4.5V TO 16V SUPPLY CURRENT/BUFFER (mA) 700 500 400 300 200 0.5 0.4 0.3 0.2 0.1 0 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 VOS (mV) 3 4 5 6 7 8 04889-0-003 100 0 0 2 4 6 8 10 12 SUPPLY VOLTAGE (V) 14 16 18 04889-0-006 NUMBER OF UNITS 600 0.6 Figure 6. Supply Current/Buffer v. Supply Voltage Figure 3. Input Offset Voltage 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 3 2 20 40 60 80 TEMPERATURE (°C) 100 V1 V2 V3 V4 V5 V6 600 INPUT BIAS CURRENT (nA) 4 1 0 –1 120 400 V7 V8 V9 V10 VCOM 200 0 –200 –2 –4 –40 –20 0 60 40 20 TEMPERATURE (°C) 80 100 120 –400 –40 –20 0 80 60 40 20 TEMPERATURE (°C) 100 Figure 8. Input Bias Current vs. Temperature Figure 5. Input Offset Voltage vs. Temperature Rev. 0 | Page 5 of 12 120 04889-0-008 –3 04889-0-005 INPUT OFFSET VOLTAGE (mV) V7 V8 V9 V10 VCOM V1 V2 V3 V4 V5 V6 0 Figure 7. Supply Current/Buffer vs. Temperature Figure 4. Input Offset Voltage Drift Distribution 5 –20 04889-0-007 TCVOS (µV/°C) 04889-0-004 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 VIN = 0V 105 0.9 V1–V10 0.8 VCOM (dB) 55 35 15 –5 0.7 0.6 0.5 0.4 0.3 –25 0.2 –45 0.1 1k 10k 100k 1M 10M FREQUENCY (Hz) 0 04889-0-010 –65 100 1 100 Figure 12. Chan VCOM Output Voltage Low vs. I Load Figure 9. Power Supply Rejection Ratio vs. Frequency 2.5 16.2 VIN = 0V VIN = 16V 16.0 2.0 15.8 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 10 LOAD CURRENT (mA) 04889-0-013 75 OUTPUT VOLTAGE (V) 95 1.5 1.0 0.5 15.6 15.4 15.2 15.0 14.8 14.6 1 10 100 LOAD CURRENT (mA) 14.2 04889-0-011 0 1 10 Figure 10. Chan 1-5 Output Voltage Low vs. I Load Figure 13. Chan 1 Output Voltage High vs. I Load 1.4 10.00 VIN = 10V VIN = 0V 9.99 1.0 9.98 OUTPUT VOLTAGE (V) 1.2 0.8 0.6 0.4 0.2 9.97 9.96 9.95 0 1 10 LOAD CURRENT (mA) 100 Figure 11. Chan 6-10 Output Voltage Low vs. I Load 9.93 1 10 LOAD CURRENT (mA) Figure 14. Chan 2-5 Output Voltage High vs. I Load Rev. 0 | Page 6 of 12 100 04889-0-015 9.94 04889-0-012 OUTPUT VOLTAGE (V) 100 LOAD CURRENT (mA) 04889-0-014 14.4 ADD8710 11 RL = 2kΩ CLOAD = 100pF VOLTAGE (4V/DIV) OUTPUT VOLTAGE (V) 9 7 5 3 1 10 100 LOAD CURRENT (mA) TIME (2µs/DIV) Figure 18. Large-Signal Transient Response Figure 15. Chan 6-10 Output Voltage High vs. I Load 20 VIN = 10V 9.99 10 9.98 0 9.97 –10 9.96 –20 140pF 90pF 40pF 9.95 9.94 –40 9.93 –50 9.92 –60 9.91 –70 9.90 10 100 LOAD CURRENT (mA) –80 100k 1M 10M FREQUENCY (Hz) Figure 16. Chan VCOM Output Voltage High vs. I Load Figure 19. Chan 1-5 Frequency Response vs. Capacitive Loading 20 RL = 2kΩ CLOAD = 100pF 10 140pF 90pF 0 VOLTAGE (50mV/DIV) 40pF –10 1040pF (dB) –20 510pF –30 –40 –50 –60 TIME (2µs/DIV) 04889-0-018 –70 Figure 17. Small-Signal Transient Response –80 100k 1M 10M FREQUENCY (Hz) Figure 20. Chan 6-10 Frequency Response vs. Capacitive Loading Rev. 0 | Page 7 of 12 04889-0-021 1 510pF –30 04889-0-020 (dB) 1040pF 04889-0-017 OUTPUT VOLTAGE (V) 10.00 04889-0-019 1 04889-0-016 VIN = 10V –1 ADD8710 10 20 140pF 5 10 90pF 10kΩ 2kΩ 0 0 1kΩ 560Ω 40pF –5 –10 150Ω 1040pF –10 –40 –20 –50 –25 –60 –30 –70 –35 –80 100k 1M 10M FREQUENCY (Hz) –40 100k 100M Figure 24. Chan VCOM Frequency Response vs. Resistive Loading 2kΩ 10kΩ 1kΩ 0 675 560Ω 600 525 IMPEDANCE (Ω) 150Ω –5 –10 –15 –20 375 300 –25 225 –30 150 –35 75 10M 100M FREQUENCY (Hz) VCOM 0 100 04889-0-023 1M GAMMA 450 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 22. Chan 1-5 Frequency Response vs. Resistive Loading 04889-0-026 5 Figure 25. Closed-Loop Output Impedance vs. Frequency 10 70 2kΩ 10kΩ 5 1kΩ 560Ω 0 60 VIN = 100mV p-p AV = 1 RL = 10kΩ 50 –5 OVERSHOOT (%) 150Ω –10 –15 –20 –25 40 –OS 30 +OS 20 –30 10 –40 100k 1M 10M 100M FREQUENCY (Hz) 0 10 100 1000 CAPACITIVE LOAD (pF) Figure 26. Chan 1-5 Small Signal Overshoot vs. Load Capacitance Figure 23. Chan 6-10 Frequency Response vs. Resistive Loading Rev. 0 | Page 8 of 12 04889-0-027 –35 04889-0-024 (dB) 10M 750 10 –40 100k 1M FREQUENCY (Hz) Figure 21. Chan VCOM Frequency Response vs. Capacitive Loading (dB) –15 04889-0-025 (dB) 510pF –30 04889-0-022 (dB) –20 ADD8710 60 70 60 VIN = 100mV p-p AV = 1 RL = 10kΩ 50 VIN = 100mV p-p AV = 1 RL = 10kΩ –OS 40 30 OVERSHOOT (%) +OS –OS +OS 40 30 20 20 0 10 100 1000 CAPACITIVE LOAD (pF) 0 10 100 1000 CAPACITIVE LOAD (pF) Figure 28. Chan VCOM Small Signal Overshoot vs. Load Capacitance Figure 27. Chan 6-10 Small Signal Overshoot vs. Load Capacitance Rev. 0 | Page 9 of 12 04889-0-029 10 10 04889-0-028 OVERSHOOT (%) 50 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 SEATING PLANE 0.20 0.09 8° 0° 0.75 0.60 0.45 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 1 Temperature Range −40°C to +85°C −40°C to +85°C Package Description 28-Lead TSSOP 28-Lead TSSOP Z = Pb-free part. Rev. 0 | Page 10 of 12 Package Option RU-28 RU-28 ADD8710 NOTES Rev. 0 | Page 11 of 12 ADD8710 NOTES © 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