4-, 5-, 6-Channel, Muxed Input Line
Inversion LCD Gamma Buffers
ADD8504/ADD8505/ADD8506
Rev. D
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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, respec-
tively, 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.
PIN CONFIGURATION DIAGRAMS
INA1
1
OUT1
16
INB1
2
OUT2
15
INA2
3
VCC1
14
INB2
4
A/B
13
INA3
5
GND
12
INB3
6
GND
11
INA4
7
OUT3
10
INB4
8
OUT4
9
05549-001
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
INA5
9
OUT4
12
INB5
10
OUT5
11
05549-002
Figure 2. ADD8505, 5-Channel Buffer
INA1
1
VCC1
24
INB1
2
OUT1
23
INA2
3
OUT2
22
INB2
4
OUT3
21
INA3
5
VCC2
20
INB3
6
A/B
19
INA4
7
GND
18
INB4
8
GND
17
INA5
9
OUT4
16
INB5
10
OUT5
15
INA6
11
OUT6
14
INB6
12
VCC3
13
05549-003
Figure 3. ADD8506, 6-Channel Buffer
ADD8504/ADD8505/ADD8506
Rev. D | Page 2 of 12
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
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
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
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
ADD8504/ADD8505/ADD8506
Rev. D | Page 3 of 12
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
CC
= 5 V, T
A
= 25°C, unless otherwise noted. V
IN
denotes buffer input voltage; I
LOAD
denotes load current; R
L
denotes load resistance;
C
L
denotes load capacitance.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
0 V V
IN
≤ 5 V 20 mV
Input Common-Mode Voltage Range V
CM
0 5 V
Input Bias Current I
B
V
IN
= 2.5 V 2 50 nA
Voltage Gain A
VO
0.985 V/V
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
I
LOAD
= +20 mA 4.75 V
Output Voltage Low V
OL
I
LOAD
= −20 mA 0.2 V
Output Resistance R
OUT
−20 mA ≤ I
LOAD
≤ +20 mA; 0.5 V ≤ V
IN
≤ 4.5 V 0.20 Ω
Output Short-Circuit Current I
SC
120 380 mA
POWER SUPPLY
Supply Current I
SY
V
IN
= 2.5 V
ADD8504 2.7 3.8 mA
ADD8505 3.0 4.4 mA
ADD8506 3.9 5.1 mA
Supply Voltage Range V
CC
3.3 6.5 V
DYNAMIC PERFORMANCE
Slew Rate SR C
L
= 15 pF 7.0 V/μs
R
L
= 250 Ω 6.2 V/μs
Settling Time t
S
C
L
= 200 pF, R
L
= 10 kΩ 2.5 6 μs
LOGIC INPUT CHARACTERISTICS
Input Current Low I
IL
V
IN
= 0.0 V 100 nA
Input Current High I
IH
V
IN
= 5.0 V 100 nA
Input Voltage Low V
IL
V
CC
= 5.0 V, −40°C ≤ T
A
≤ 105°C 0.8 V
V
CC
= 3.3 V, −40°C ≤ T
A
≤ 105°C 0.7 V
Input Voltage High V
IH
V
CC
= 5.0 V, −40°C ≤ T
A
≤ 105°C 1.7 V
V
CC
= 3.3 V, −40°C ≤ T
A
≤ 105°C 1.4 V

ADD8506WRUZ

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
LCD Gamma Buffers 6CH Muxed Input Line Inversion LCD
Lifecycle:
New from this manufacturer.
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