ADD8707WCPZ-REEL7 Analog Devices Inc, ADD8707WCPZ-REEL7 Datasheet
ADD8707WCPZ-REEL7
Specifications of ADD8707WCPZ-REEL7
Related parts for ADD8707WCPZ-REEL7
ADD8707WCPZ-REEL7 Summary of contents
Page 1
FEATURES 12 precision gamma reference outputs Mask-programmable gamma resistors: 0.2% resolution and 0.1% accuracy Mask programmable voltage regulator: 0.4% accuracy Upper 6 buffers swing Lower 6 buffers swing to GND Single-supply operation: 7 ...
Page 2
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 ................................................... ...
Page 3
ELECTRICAL CHARACTERISTICS +25 C, unless otherwise noted Table 1. Parameter GAMMA CURVE CHARACTERISTICS Accuracy Programming Resolution Total Resistor String Value BUFFER CHARACTERISTICS OUTPUTS Output Voltage Range (Ch12 to Ch7) Output Voltage ...
Page 4
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 ...
Page 5
ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage ( Input Voltage Storage Temperature Range 1 Operating Temperature Range Lead Temperature Range (Soldering 10 sec) Junction Temperature ESD Tolerance (HBM) ESD Tolerance (MM) Table 3. Thermal Resistance θ Package ...
Page 6
ADD8707 PIN CONFIGURATION AND FUNCTION DESCRIPTION V Table 4. Pin Function Descriptions Pin No. Name Description GND Ground. Normally Supply voltage. Normally Regulator output voltage. Provides reference voltage ...
Page 7
Pin No. Name Description amplifier output. COM OUT COM 28 GND Ground. Normally Supply voltage. Normally OUT OUT Buffer outputs. ...
Page 8
ADD8707 TYPICAL PERFORMANCE CHARACTERISTICS 15mA I = 25mA SINK SINK 0mA LOAD –5 –10 –15 –20 – 25mA SOURCE – 15mA I SOURCE SOURCE –35 –20 –10 ...
Page 9
GAMMA OUTPUT ERROR DUE TO OFFSET AND RESISTOR MATCHING (% OF FS) Figure 9. Gamma Output Voltage Error ...
Page 10
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 ...
Page 11
TIME (ns) Figure 21. Gamma Buffers Transient Load Response vs. Capacitive Loading 10V PULSE 120pF 320pF 520pF 1nF 10nF 1200 1400 ...
Page 12
ADD8707 APPLICATION NOTES The ADD8707 is a mask-programmable gamma reference generator that allows source drivers to be optimized for the different combinations of liquid crystals, glass sizes, etc. in large LCD panels. It generates 12 gamma reference outputs that can ...
Page 13
VOLTAGE REGULATOR The on-board voltage regulator provides a regulated voltage to the resistor chain to provide stable gamma voltages. The output of the regulator is set by the two mask program- mable internal resistors R1 and R2, and a reference ...
Page 14
ADD8707 OPERATING TEMPERATURE RANGE The junction temperature is as follows θ × AMB JA DIS where ambient temperature specified on the data sheet. AMB θ = junction-to-ambient thermal resistance, in °C/watt. JA ...
Page 15
HEAT SINK SOLDER PASTE AREA 1.90mm 5.93mm Figure 27. 48-Lead LFCSP (CP-48) Land Pattern—Dimensions shown in millimeters Notes: 1. Gray area represents the board metallization. 2. White area represents the solder mask and vias. 3. Hatched area is for the ...
Page 16
ADD8707 TYPICAL APPLICATIONS CIRCUIT NORMALLY OPEN 5kΩ 1.2V VOLTAGE REGULATOR 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω* V ...
Page 17
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 ...
Page 18
ADD8707 0.1µF 55kΩ ESD PROTECTION RESISTOR 5kΩ 700Ω 1.2V – ESD PROTECTION RESISTORS 700Ω 700Ω 700Ω 700Ω 700Ω 700Ω V ...
Page 19
TAP POINT AND REGULATOR VOLTAGE REQUEST FORM REGULATOR SECTION—V REG OUT To ensure correct regulator operation 15 Parameter Value (6.9 V – 15 REG OUT TAP POINT SECTION Gamma output voltages are calculated ...
Page 20
... 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. ...