ANALOG DEVICES ADD8504 Service Manual
4-, 5-, 6-Channel, Muxed Input Line
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
Qualified for automotive applications
APPLICATIONS
LCD line inversion gamma references
Car navigation panels
Personal media player panels
Automotive infotainment systems
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, respectively, in 16-, 20-, and 24-lead thin shrink small outline (TSSOP),
surface-mount, Pb-free packages. The ADD8506 is also offered
in a leaded TSSOP.
The ADD8506WWARUZR7 is the automotive grade version.
Inversion LCD Gamma Buffers
ADD8504/ADD8505/ADD8506
PIN CONFIGURATION DIAGRAMS
INA1
1
INB1
2
INA2
3
INB2
4
INA3
5
INB3
6
INA4
7
INB4
8
Figure 1. ADD8504, 4-Channel Buffer
INA1 1 VCC120
INB1 2 OUT119
INA2 3 OUT218
INB2 4 OUT317
INA3 5 VCC216
INB3 6 A/B15
INA4 7 GND14
INB4 8 GND13
9
INA5
10
INB5
Figure 2. ADD8505, 5-Channel Buffer
INA1
1
INB1
2
3
INA2
INB2
4
INA3
5
6
INB3
INA4
7
INB4
8
INA5
9
INB5
10
11
INA6
INB6
12
Figure 3. ADD8506, 6-Channel Buffer
OUT1
16
OUT2
15
VCC1
14
A/B
13
GND
12
GND
11
OUT3
10
OUT4
9
05549-001
12
OUT4
11
OUT5
05549-002
VCC1
24
OUT1
23
22
OUT2
OUT3
21
VCC2
20
19
A/B
GND
18
GND
17
OUT4
16
OUT5
15
14
OUT6
VCC3
13
05549-003
Rev. D
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
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2005–2010 Analog Devices, Inc. All rights reserved.
ADD8504/ADD8505/ADD8506
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configuration Diagrams ........................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Electrical Characteristics ............................................................. 3
Absolute Maximum Ratings ............................................................ 4
Thermal Resistance ...................................................................... 4
REVISION HISTORY
6/10—Rev. C to Rev. D
Change to Features Section, Applications Section, and General
Description Section .......................................................................... 1
Changes to Ordering Guide ............................................................ 9
Added Automotive Ordering Guide and Automotive Products
Section ................................................................................................ 9
9/07—Rev. B to Rev. C
Change to General Description ...................................................... 1
Change to Ordering Guide .............................................................. 9
1/06—Rev. A to Rev. B
Added Pin Configurations and Function
Descriptions Section ........................................................................ 5
Added Table 5 .................................................................................... 8
ESD Performance ..........................................................................4
ESD Caution...................................................................................4
Pin Configurations and Function Descriptions ............................5
Typical Performance Characteristics ..............................................6
Applications Information .................................................................7
Outline Dimensions ..........................................................................8
Ordering Guide .............................................................................9
Automotive Ordering Guide ........................................................9
Automotive Products ....................................................................9
10/05—Rev. 0 to 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
Rev. D | Page 2 of 12
ADD8504/ADD8505/ADD8506
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VCC = 5 V, TA = 25°C, unless otherwise noted. VIN denotes buffer input voltage; I
C
denotes load capacitance.
L
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS 0 V ≤ VIN ≤ 5 V 20 mV
Input Common-Mode Voltage Range V
CM
Input Bias Current IB V
0 5 V
= 2.5 V 2 50 nA
IN
Voltage Gain AVO 0.985 V/V
OUTPUT CHARACTERISTICS
Output Voltage High VOH I
Output Voltage Low VOL I
Output Resistance R
OUT
= +20 mA 4.75 V
LOAD
= −20 mA 0.2 V
LOAD
−20 mA ≤ I
≤ +20 mA; 0.5 V ≤ VIN ≤ 4.5 V 0.20 Ω
LOAD
Output Short-Circuit Current ISC 120 380 mA
POWER SUPPLY
Supply Current ISY V
= 2.5 V
IN
ADD8504 2.7 3.8 mA
ADD8505 3.0 4.4 mA
ADD8506 3.9 5.1 mA
Supply Voltage Range VCC 3.3 6.5 V
DYNAMIC PERFORMANCE
Slew Rate SR CL = 15 pF 7.0 V/μs
R
Settling Time tS C
= 250 Ω 6.2 V/μs
L
= 200 pF, RL = 10 kΩ 2.5 6 μs
L
LOGIC INPUT CHARACTERISTICS
Input Current Low IIL V
Input Current High IIH V
Input Voltage Low VIL V
V
= 0.0 V 100 nA
IN
= 5.0 V 100 nA
IN
= 5.0 V, −40°C ≤ TA ≤ 105°C 0.8 V
CC
= 3.3 V, −40°C ≤ TA ≤ 105°C 0.7 V
CC
Input Voltage High VIH VCC = 5.0 V, −40°C ≤ TA ≤ 105°C 1.7 V
V
= 3.3 V, −40°C ≤ TA ≤ 105°C 1.4 V
CC
denotes load current; RL denotes load resistance;
LOAD
Rev. D | Page 3 of 12
ADD8504/ADD8505/ADD8506
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Supply Voltage 7 V
Input Voltage GND to VCC
Storage Temperature Range −65°C to +150°C
Junction Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 60 sec) 300°C
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
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
Table 3. Thermal Package Characteristics
Model Package Type θ
ADD8504WRUZ 16-Lead Pb-Free TSSOP 150 28 °C/W
ADD8505WRUZ 20-Lead Pb-Free TSSOP 143 45 °C/W
ADD8506WRUZ 24-Lead Pb-Free TSSOP 128 45 °C/W
1
θJA is specified for natural convection on a two-layer board.
2
θJC is specified for natural convection on a two-layer board.
1
θ
JA
2
Unit
JC
ESD PERFORMANCE
Table 4.
Model HBM1 MM2 FICDM3
ADD8504WRUZ 4.0 kV 400 V 1.0 kV
ADD8505WRUZ 3.5 kV 200 V 1.0 kV
ADD8506WRUZ 3.5 kV 200 V 1.0 kV
1
Human body model.
2
Machine model.
3
Field induced charge device model.
ESD CAUTION
Rev. D | Page 4 of 12
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