ADD8505 Analog Devices, ADD8505 Datasheet

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ADD8505

Manufacturer Part Number
ADD8505
Description
Manufacturer
Analog Devices
Datasheet
FEATURES
Single-supply operation: 3.3 V to 6.5 V
Rail-to-rail input, rail-to-rail output
High output current: 380 mA
Low supply current: 3.9 mA
Stable with 1 nF loads
Wide temperature range: −40°C to +105°C
16-, 20-, and 24-lead, Pb-free, TSSOP packages
APPLICATIONS
LCD line inversion gamma references
Car navigation panels
Personal media player panels
GENERAL DESCRIPTION
The ADD8504, ADD8505, and ADD8506 are 4-, 5-, and
6-channel LCD gamma reference buffers designed to drive
column driver gamma inputs in line inversion panels. Each
buffer channel has an A/B input to select between two gamma
voltage curves. These buffer channels drive the resistor ladders
of LCD column drivers for gamma correction. The ADD8504/
ADD8505/ADD8506 outputs have high slew rates and output
drives that increase the stability of the reference ladder resulting
in optimal gray scale and visual performance.
The ADD8504/ADD8505/ADD8506 are specified over the
−40°C to +105°C temperature range. They are available, respec-
tively, in 16-, 20-, and 24-lead thin shrink small outline (TSSOP),
surface-mount, Pb-free packages.
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.
Line Inversion LCD Gamma Buffers
4-, 5-, 6-Channel, Muxed Input
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
ADD8504/ADD8505/ADD8506
PIN CONFIGURATION DIAGRAMS
Figure 1. ADD8504: 4-Channel Buffer
Figure 2. ADD8505: 5-Channel Buffer
Figure 3. ADD8506: 6-Channel Buffer
INA1
INB1
INA2
INB2
INA3
INB3
INA4
INB4
INA1
INB1
INA2
INB2
INA3
INB3
INA4
INB4
INA5
INB5
INA1
INB1
INA2
INB2
INA3
INB3
INA4
INB4
INA5
INB5
INA6
INB6
10
10
11
12
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
©2006 Analog Devices, Inc. All rights reserved.
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15
14
13
12
11
10
20
19
18
17
16
15
14
13
12
11
24
23
22
21
20
19
18
17
16
15
14
13
9
OUT1
OUT2
VCC1
A/B
GND
GND
OUT3
OUT4
VCC1
OUT1
OUT2
OUT3
VCC2
A/B
GND
GND
OUT4
OUT5
VCC1
OUT1
OUT2
OUT3
VCC2
A/B
GND
GND
OUT4
OUT5
OUT6
VCC3
www.analog.com

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ADD8505 Summary of contents

Page 1

... LCD line inversion gamma references Car navigation panels Personal media player panels GENERAL DESCRIPTION The ADD8504, ADD8505, and ADD8506 are 4-, 5-, and 6-channel LCD gamma reference buffers designed to drive column driver gamma inputs in line inversion panels. Each buffer channel has an A/B input to select between two gamma voltage curves ...

Page 2

... Absolute Maximum Ratings............................................................ 4 REVISION HISTORY 1/06—Rev Rev. B Added Pin Configurations and Function Descriptions Section ........................................................................ 5 Added Table 5.................................................................................... 8 10/05—Rev Rev. A Added ADD8504 and ADD8505......................................Universal Changes to Specifications Section.................................................. 3 Updated Outline Dimensions ......................................................... 7 Changes to Ordering Guide ............................................................ 7 9/05—Revision 0: Initial Version Thermal Resistance .......................................................................4 ESD Performance ..........................................................................4 ESD Caution ...

Page 3

... 5.0 V, −40°C ≤ T ≤ 105° 3.3 V, −40°C ≤ T ≤ 105° Rev Page ADD8504/ADD8505/ADD8506 denotes load current; R denotes load resistance; L Min Typ Max 0.985 4.75 0.2 ≤ 4.5 V 0.20 IN 120 380 2 ...

Page 4

... JA 2 θ is specified for natural convection on a two-layer board. JC ESD PERFORMANCE Table 4. Model ADD8504WRUZ ADD8505WRUZ ADD8506WRUZ 1 Human body model. 2 Machine model. 3 Field induced charge device model. Rev Page Package Type θ ...

Page 5

... GND 7 14 INB4 GND 8 13 INA5 OUT4 9 12 INB5 OUT5 10 11 Figure 5. ADD8505 5-Channel Buffer Function Description Input Channel 1 Buffer Input A. Input Channel 1 Buffer Input B. Input Channel 2 Buffer Input A. Input Channel 2 Buffer Input B. Input Channel 3 Buffer Input A. Input Channel 3 Buffer Input B. ...

Page 6

... ADD8504/ADD8505/ADD8506 TYPICAL PERFORMANCE CHARACTERISTICS 5 2. 25°C 5.0 A 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 SUPPLY VOLTAGE (V) Figure 7. Supply Current vs. Supply Voltage 1000 VCC = 25°C A 100 OUTPUT HIGH OUTPUT LOW LOAD CURRENT (mA) Figure 8. Δ Output Voltage to Supply Rail vs. Load Current 6 CH6 4 CH2 2 CH5 ...

Page 7

... RAx RESISTORS ARE USED TO SET POSITIVE INVERSION GAMMA VOLTAGES. 2. RBx RESISTORS ARE USED TO SET NEGATIVE INVERSION GAMMA VOLTAGES. Power supply pins on the ADD8505 and ADD8506 have multiple ground (GND) and supply (VCC) connections. Because of the high peak currents that these buffers deliver recommended that all GND and VCC pins be connected and suitably bypassed ...

Page 8

... ADD8504WRUZ-REEL7 −40°C to +105°C 1 ADD8504WRUZ-REEL −40°C to +105°C 1 ADD8505WRUZ −40°C to +105°C 1 ADD8505WRUZ-REEL7 −40°C to +105°C ADD8505WRUZ-REEL 1 −40°C to +105°C 1 ADD8506WRUZ −40°C to +105°C 1 ADD8506WRUZ-REEL7 −40°C to +105°C 1 ADD8506WRUZ-REEL −40°C to +105° Pb-free part. © ...

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