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Part Number ADD8505

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4-, 5-, 6-Channel, Muxed Input
Line Inversion LCD Gamma Buffers
ADD8504/ADD8505/ADD8506
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.


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
©2006 Analog Devices, Inc. All rights reserved.
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.
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
VCC1
20
INB1
2
OUT1
19
INA2
3
OUT2
18
INB2
4
OUT3
17
INA3
5
VCC2
16
INB3
6
A/B
15
INA4
7
GND
14
INB4
8
GND
13
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. B | Page 2 of 8
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........................................................................................7
Outline Dimensions ..........................................................................8
Ordering Guide .............................................................................8
REVISION HISTORY
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. B | Page 3 of 8
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
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/s
R
L
= 250
6.2
V/s
Settling Time
t
S
C
L
= 200 pF, R
L
= 10 k
2.5
6
s
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
Input Voltage Low
V
IL
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
Input Voltage High
V
IH
V
CC
= 3.3 V, -40°C T
A
105°C
1.4
V
ADD8504/ADD8505/ADD8506
Rev. B | Page 4 of 8
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Supply Voltage
7 V
Input Voltage
GND to V
CC
Storage Temperature Range
-65°C to +150°C
Junction Temperature Range
-65°C to +150°C
Lead Temperature (Soldering, 60 sec)
300°C
Stresses beyond 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
JA
1
JC
2
Unit
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
JA
is specified for natural convection on a two-layer board.
2
JC
is specified for natural convection on a two-layer board.
ESD PERFORMANCE
Table 4.
Model
HBM
1
MM
2
FICDM
3
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
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
ADD8504/ADD8505/ADD8506
Rev. B | Page 5 of 8
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
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 4. ADD8506
6-Channel Buffer
INA1
1
VCC1
20
INB1
2
OUT1
19
INA2
3
OUT2
18
INB2
4
OUT3
17
INA3
5
VCC2
16
INB3
6
A/B
15
INA4
7
GND
14
INB4
8
GND
13
INA5
9
OUT4
12
INB5
10
OUT5
11
05549-002
Figure 5. ADD8505
5-Channel Buffer
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 6. ADD8504
4-Channel Buffer
Table 5. Pin Function Descriptions
ADD8506
Pin No.
ADD8505
Pin No.
ADD8504
Pin No.
Mnemonic
Function
Description
1
1
1
INA1
Input
Channel 1 Buffer Input A.
2
2
2
INB1
Input
Channel 1 Buffer Input B.
3
3
3
INA2
Input
Channel 2 Buffer Input A.
4
4
4
INB2
Input
Channel 2 Buffer Input B.
5
5
5
INA3
Input
Channel 3 Buffer Input A.
6
6
6
INB3
Input
Channel 3 Buffer Input B.
7
7
7
INA4
Input
Channel 4 Buffer Input A.
8
8
8
INB4
Input
Channel 4 Buffer Input B.
9
9
N/A
INA5
Input
Channel 5 Buffer Input A.
10
10
N/A
INB5
Input
Channel 5 Buffer Input B.
11
N/A
N/A
INA6
Input
Channel 6 Buffer Input A.
12
N/A
N/A
INB6
Input
Channel 6 Buffer Input B.
13
N/A
N/A
VCC3
Power In
Power Supply Input. Short to VCC1 and VCC2. Typically connected to +5 V.
14
N/A
N/A
OUT6
Output
Channel 6 Buffer Output.
15
11
N/A
OUT5
Output
Channel 5 Buffer Output.
16
12
9
OUT4
Output
Channel 4 Buffer Output.
17, 18
13, 14
11, 12
GND
Ground
Ground.
19
15
13
A/B
Input
Switch Control. Logic high selects Input A; logic low selects Input B.
20
16
N/A
VCC2
Power In
Power Supply Input. Short to VCC1 and VCC3. Typically connected to +5 V.
21 17 10 OUT3
Output
Channel
3
Buffer
Output.
22 18 15 OUT2
Output
Channel
2
Buffer
Output.
23 19 16 OUT1
Output
Channel
1
Buffer
Output.
24
20
14
VCC1
Power In
Power Supply Input. Short to VCC2 and VCC3. Typically connected to +5 V.
ADD8504/ADD8505/ADD8506
Rev. B | Page 6 of 8
TYPICAL PERFORMANCE CHARACTERISTICS
5.5
5.0
0
0
SUPPLY VOLTAGE (V)
S
U
P
P
L
Y
CURRE
NT (mA)
7
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
1
2
3
4
5
6
V
CM
= 2.5V
T
A
= 25
°
C
05549-004
Figure 7. Supply Current vs. Supply Voltage
1000
1
0
LOAD CURRENT (mA)
OU
TPU
T
VOLTA
GE TO SU
PPLY R
A
IL (
m
V)
100
100
10
1
10
VCC = 5V
T
A
= 25
°
C
05549-005
OUTPUT HIGH
OUTPUT LOW
Figure 8. Output Voltage to Supply Rail vs. Load Current
6
­8
­40
TEMPERATURE (
°
C)
V
OS
(mV
)
4
2
0
­2
­4
­6
0
25
40
80
90
95
100
105
CH6
CH5
CH2
CH3
CH1
CH4
VCC = 5V
V
CM
= 2.5V
05549-006
Figure 9. Offset Voltage vs. Temperature
CH1 2.00V
CH2
2.00V
M400ns
VCC = 5V
T
A
= 25
°
C
5V
0V
INPUT
OUTPUT
5V
0V
05549-007
Figure 10. Transient Response--Rising
CH1 2.00V
CH2
2.00V
M400ns
VCC = 5V
T
A
= 25
°
C
5V
0V
INPUT
OUTPUT
5V
0V
05549-008
Figure 11. Transient Response--Falling
ADD8504/ADD8505/ADD8506
Rev. B | Page 7 of 8
APPLICATIONS
The ADD8504/ADD8505/ADD8506 have CMOS buffers with
A/B inputs to select between two different reference voltages set
up by an external resistor ladder. Input bias currents are orders
of magnitude less than competitive parts. This allows the use of
a very large resistor ladder to save supply current.
The buffer outputs are designed to drive resistive or capacitive
loads. Therefore, to attain the best display performance, do not
use resistors in series with these outputs. Outputs have high
slew rates and 6 s settling times. Each output delivers a mini-
mum of 120 mA, ensuring a fast response to varying loads.
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, it
is recommended that all GND and VCC pins be connected and
suitably bypassed.
Table 6. MUX Function
A/B Select
Input
Logic High
INAx
Logic Low
INBx
RB1
RB2
RB3
RB4
RB5
RB6
5V
5V
RB7
RA1
RA2
RA3
RA4
RA5
RA6
RA7
0.1
F
0.1
F
NOTES
1. RAx RESISTORS ARE USED TO SET POSITIVE INVERSION GAMMA VOLTAGES.
2. RBx RESISTORS ARE USED TO SET NEGATIVE INVERSION GAMMA VOLTAGES.
2
23
24
TO COLUMN
DRIVERS
VCOM
(INVERTING SIGNAL)
5V
0.1
F
05549-009
1
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
10
10
14
11
12
13
Figure 12. Typical Application
ADD8504/ADD8505/ADD8506
Rev. B | Page 8 of 8
OUTLINE DIMENSIONS
16
9
8
1
PIN 1
SEATING
PLANE
8°
0°
4.50
4.40
4.30
6.40
BSC
5.10
5.00
4.90
0.65
BSC
0.15
0.05
1.20
MAX
0.20
0.09
0.75
0.60
0.45
0.30
0.19
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-153-AB
Figure 13. 16-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-16)
Dimensions shown in millimeters
COMPLIANT TO JEDEC STANDARDS MO-153-AC
20
1
11
10
6.40 BSC
4.50
4.40
4.30
PIN 1
6.60
6.50
6.40
SEATING
PLANE
0.15
0.05
0.30
0.19
0.65
BSC
1.20 MAX
0.20
0.09
0.75
0.60
0.45
8°
0°
COPLANARITY
0.10
Figure 14. 20-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-20)
Dimensions shown in millimeters
24
13
12
1
6.40 BSC
4.50
4.40
4.30
PIN 1
7.90
7.80
7.70
0.15
0.05
0.30
0.19
0.65
BSC
1.20
MAX
0.20
0.09
0.75
0.60
0.45
8°
0°
SEATING
PLANE
0.10 COPLANARITY
COMPLIANT TO JEDEC STANDARDS MO-153-AD
Figure 15. 24-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-24)
Dimensions shown in millimeters
ORDERING GUIDE
Model
Temperature
Range
Package Description
Package
Option
Ordering
Quantity
ADD8504WRUZ
1
-40°C to +105°C
16-Lead Thin Shrink Small Outline Package [TSSOP], Tube
RU-16
96
ADD8504WRUZ-REEL7
1
-40°C to +105°C
16-Lead Thin Shrink Small Outline Package [TSSOP], 7" Reel
RU-16
1,000
ADD8504WRUZ-REEL
1
-40°C to +105°C
16-Lead Thin Shrink Small Outline Package [TSSOP], 13" Reel
RU-16
2,500
ADD8505WRUZ
1
-40°C to +105°C
20-Lead Thin Shrink Small Outline Package [TSSOP], Tube
RU-20
96
ADD8505WRUZ-REEL7
1
-40°C to +105°C
20-Lead Thin Shrink Small Outline Package [TSSOP], 7" Reel
RU-20
1,000
ADD8505WRUZ-REEL
1
-40°C to +105°C
20-Lead Thin Shrink Small Outline Package [TSSOP], 13" Reel
RU-20
2,500
ADD8506WRUZ
1
-40°C to +105°C
24-Lead Thin Shrink Small Outline Package [TSSOP], Tube
RU-24
96
ADD8506WRUZ-REEL7
1
-40°C to +105°C
24-Lead Thin Shrink Small Outline Package [TSSOP], 7" Reel
RU-24
1,000
ADD8506WRUZ-REEL
1
-40°C to +105°C
24-Lead Thin Shrink Small Outline Package [TSSOP], 13" Reel
RU-24
2,500
1
Z = Pb-free part.
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05549-0-1/06(B)