ADD8707 Analog Devices, Inc., ADD8707 Datasheet
ADD8707
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ADD8707 Summary of contents
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... LCD TV panels LCD monitor panels PRODUCT OVERVIEW The ADD8707 is a 12-channel integrated gamma reference with VCOM for use in LCD TV and monitor panels. The output buffers feature high current drive and low offset voltage to provide an accurate and stable gamma curve. The top six channels swing to VDD and the lower six channels swing to GND ...
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... ADD8707 TABLE OF CONTENTS Electrical Characteristics ................................................................. 3 Absolute Maximum Ratings............................................................ 5 Pin Configuration and Function Description .............................. 6 Typical Performance Characteristics ............................................. 8 Application Notes ........................................................................... 12 Tap Point Selection..................................................................... 12 Voltage Regulator ....................................................................... 13 Maximum Power Dissipation ................................................... 13 Land Pattern................................................................................ 13 Operating Temperature Range ................................................. 14 Typical Applications Circuit.......................................................... 16 Development Circuit...................................................................... 17 Tap Point and Regulator Voltage Request Form......................... 19 Regulator Section— ...
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... REG LINE IN OUT = 100 µ REG I LOAD O I −40°C ≤ T ≤ +105° REF I −40°C ≤ T ≤ +105° Rev Page ADD8707 Min Typ Max 0.1 0.4 0 − 1 0.5 1.5 1 ...
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... ADD8707 Parameter SYSTEM ACCURACY 3, 4 Total Error POWER SUPPLY Supply Voltage Supply Current 1 Gamma curve accuracy includes resistor matching and buffer errors, but excludes the regulator error. ∆ the shift from the desired output voltage under the specified current load. ...
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... section of this specification is not implied. Exposure to absolute −65°C to +150°C maximum rating conditions for extended periods may affect −40°C to +105°C device reliability. 300°C 150°C ±3000 V ±100 V θ Unit 3 JA 47.7 °C/W Rev Page ADD8707 ...
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... External resistors can be added to modify the internal resistor string to change the gamma voltage. An external resistor calculator is available upon request GND REG OUT FB 5 ADD8707 NC 6 TOP VIEW NC 7 (Not to Scale ...
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... Buffer outputs. These buffers can swing to ground OUT 40 GND Ground. Normally Supply voltage. Normally OUT OUT OUT Buffer outputs. These buffers can swing OUT OUT OUT Rev Page ADD8707 ...
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... ADD8707 TYPICAL PERFORMANCE CHARACTERISTICS 15mA I = 25mA SINK SINK 0mA LOAD –5 –10 –15 –20 – 25mA SOURCE – 15mA I SOURCE SOURCE –35 –20 – 100 110 120 TEMPERATURE (°C) Figure 3. Output Voltage Error vs. Temperature ...
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... TYPICAL UNIT A MIN ERROR EACH STEP OUTPUT CHANNEL I = 0mA LOAD I = 5mA LOAD I = 10mA LOAD INPUT VOLTAGE (V) Figure 13. Dropout Characteristics OUTPUT CURRENT (mA) Figure 14. Dropout Voltage vs. Output Current ADD8707 ...
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... ADD8707 800 750 700 650 600 550 500 450 400 350 300 250 200 150 100 50 0 –25 –15 – TEMPERATURE (°C) Figure 15. Dropout Voltage vs. Temperature 14.5 14.4 14.3 14.2 +25°C 14.1 +55°C 14.0 +85°C 13.9 13.8 13.7 13 LOAD CURRENT (mA) Figure 16. Regulator Output vs. I LOAD 14 ...
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... TIME (ns) Figure 21. Gamma Buffers Transient Load Response vs. Capacitive Loading 10V PULSE 120pF 320pF 520pF 1nF 10nF 1200 1400 1600 1800 Rev Page 8.8 8.7 8.6 8.5 8.4 8.3 8.2 8.1 – TEMPERATURE (°C) Figure 22. Supply Current vs. Temperature ADD8707 100 120 ...
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... TAP POINT SELECTION TAP POINT 500 The ADD8707 uses a single resistor string consisting of 500 TAP POINT 499 individual elements. The tap points are mask programmable TAP POINT 498 and completely independent of each other. Refer to the Tap Point and Regulator Voltage Request Form in this data sheet ...
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... The land pattern is critical to heat dissipation. A suggested land pattern is shown in Figure 27. The thermal pad is attached to the substrate. In the ADD8707, V REG OUT the substrate is connected to V thermal pad should be soldered to an area on the board that is electrically isolated or connected to V pad to ground adversely affects the performance of the part ...
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... J AMB JA DIS where ambient temperature specified on the data sheet. AMB θ = junction-to-ambient thermal resistance, in °C/watt power dissipated in the device, in watts. DIS For the ADD8707, P can be calculated by DIS × Σ(I × (V DIS DD DQ OUT X(+) DD Σ(−I × – ...
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... The thermal pad is electrically active. The solder mask opening should be 0.150 mm larger than the pad size, resulting in 0.075 mm of clearance between the copper pad and solder mask. 7.31mm 5.40mm 0.5mm 0.075mm 1.60mm 0.075mm 0.33mm DIAMETER 0.28mm THERMAL VIA Rev Page ADD8707 1.60mm 5.78mm 0.69mm ...
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... ADD8707 TYPICAL APPLICATIONS CIRCUIT NORMALLY OPEN 5kΩ 1.2V VOLTAGE REGULATOR 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω *ESD PROTECTION RESISTORS 14.4V 0.1µF V COM IN+ V COM IN– ...
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... DEVELOPMENT CIRCUIT For development purposes, the ADD8707 is available in a generic form without the tap points (see Figure 29). The typical applications circuit for this part is shown in Figure 30. To order this version, refer to the Ordering Guide. The model listed is the development version ...
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... IN 700Ω 700Ω 700Ω 700Ω 700Ω Figure 30. Typical Applications Circuit for ADD8707 Development Version (with No Tap Points) 14.4V 8.2kΩ V COM IN+ 4.7kΩ V COM IN– 2kΩ V REG OUT PANEL V V COM V COM OUT VOLTAGE REGULATOR 14.4V ...
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... CUSTOMER INFORMATION Name: ____________________________________________ Company: ____________________________________________ Address: ____________________________________________ ____________________________________________ Date: ____________________________________________ Please return this form to your local sales office. must exceed V by 600 mV minimum—that is REG Rev Page ADD8707 = 14.4 V requires a minimum REG and the desired output REG OUT ...
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... MAX 0.85 0.80 SEATING PLANE ORDERING GUIDE 1 Model Temperature Package 2, 3 ADD8707WCPZ-REEL7 –40°C to +105°C 1 Available in reels only Pb-free part. 3 Development version. © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...