9- and 11-Channel, Muxed Input
LCD Reference Buffers
AD8509/AD8511
FEATURES
Single-supply operation: 3.3 V to 6.5 V
High output current: 300 mA
Low supply current: 6 mA
Stable with 1000 pF loads
Pin-compatible with LMC6009
Pin-compatible with CL-FP6131
48-lead, Pb-free, TSSOP package
FUNCTIONAL BLOCK DIAGRAM
INA1
INB1
INA2
INB2
VO2
VO1
INA11
INB11
A/B
VO11
03237-001
APPLICATION
LCD line inversion gamma references
Figure 1.
GENERAL DESCRIPTION
The AD8509 and AD8511 are 9-channel and 11-channel LCD
reference buffers, respectively, designed to drive 64 gray scale
column drivers. Each buffer has an A/B input to select between
two voltages for LCD displays. These buffers drive the resistor
ladders of LCD column drivers for gamma correction. These
LCD drivers have higher slew rates and higher output drive
currents than similar competitive parts. This increases the
stability of the reference ladder, resulting in better gray scale
and visual performance.
The AD8509 and AD8511 are specified over the 鈭?0掳C to +85掳C
temperature range. They are available in 48-lead, thin shrink
small outline (TSSOP), surface-mount, Pb-free packages in tape
and reel.
NC
1
NC
2
NC
3
INA1
4
INB1
5
INA2
6
INB2
7
INA3
8
INB3
9
INA4
10
INB4
11
PIN CONFIGURATIONS
48
47
46
45
NC
NC
NC
NC
NC
1
INA1
2
INB1
3
INA2
4
INB2
5
INA3
6
INB3
7
INA4
8
INB4
9
INA5
10
INB5
11
48
47
46
45
44
43
42
41
40
39
NC
VO1
NC
NC
V
CC
GND
VO2
VO3
VO4
VO5
V
CC
GND
VO6
VO7
VO8
VO9
VO10
GND
V
CC
A/B
NC
NC
VO11
03237-002
44
V
CC
43
42
41
40
39
GND
VO1
VO2
VO3
VO4
AD8509
TOP VIEW
(Not to Scale)
38
V
CC
37
36
35
34
33
32
31
30
29
28
27
26
25
AD8511
TOP VIEW
(Not to Scale)
38
37
36
35
34
33
32
31
30
29
28
27
26
25
INA5
12
INB5
13
INA6
14
INB6
15
INA7
16
INB7
17
GND
VO5
VO6
VO7
VO8
VO9
GND
V
CC
A/B
NC
NC
NC
NC
INA6
12
INB6
13
INA7
14
INB7
15
INA8
16
INB8
17
INA8
18
INB8
19
INA9
20
INB9
21
NC
NC
22
23
INA9
18
INB9
19
INA10
20
INB10
21
NC
22
INA11
23
INB11
24
NC
24
NC
NC = NO CONNECT
NC = NO CONNECT
Figure 2. AD8509 and AD8511 48-Lead TSSOP (RU Suffix)
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: 781.326.8703
漏 2005 Analog Devices, Inc. All rights reserved.
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