4-, 5-, 6-Channel, Muxed Input
Line Inversion LCD Gamma Buffers
ADD8504/ADD8505/ADD8506
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: 鈭?0擄C to +105擄C
16-, 20-, and 24-lead, Pb-free, TSSOP packages
PIN CONFIGURATION DIAGRAMS
INA1
1
INB1
2
INA2
3
INB2
4
INA3
5
INB3
6
INA4
7
INB4
8
16
15
14
13
12
11
10
9
OUT1
OUT2
VCC1
A/B
GND
GND
05549-001
05549-003
05549-002
OUT3
OUT4
APPLICATIONS
LCD line inversion gamma references
Car navigation panels
Personal media player panels
INA1
1
INB1
2
INA2
3
20
VCC1
19
OUT1
18
OUT2
17
OUT3
16
VCC2
15
A/B
14
GND
13
GND
12
OUT4
11
OUT5
Figure 1. ADD8504: 4-Channel Buffer
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
鈭?0擄C to +105擄C temperature range. They are available, respec-
tively, in 16-, 20-, and 24-lead thin shrink small outline (TSSOP),
surface-mount, Pb-free packages.
INB2
4
INA3
5
INB3
6
INA4
7
INB4
8
INA5
9
INB5
10
Figure 2. ADD8505: 5-Channel Buffer
INA1
1
INB1
2
INA2
3
INB2
4
INA3
5
INB3
6
INA4
7
INB4
8
INA5
9
INB5
10
INA6
11
INB6
12
24
VCC1
23
OUT1
22
OUT2
21
OUT3
20
VCC2
19
A/B
18
GND
17
GND
16
OUT4
15
OUT5
14
OUT6
13
VCC3
Figure 3. ADD8506: 6-Channel Buffer
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
漏2006 Analog Devices, Inc. All rights reserved.
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