9- and 11-Channel, Muxed Input
LCD Reference Buffers
AD8509/AD8511
Rev. C
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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.
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Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved.
FEATURES PIN CONFIGURATIONS
Single-supply operation: 3.3 V to 6.5 V
NC
1
INA1
2
INB1
3
INA2
4
NC
48
VO1
47
NC
46
NC
45
INB2
5
V
CC
44
INA3
6
GND
43
INB3
7
VO2
42
INA4
8
VO3
41
INB4
9
VO4
40
INA5
10
VO5
39
INB5
11
V
CC
38
INA6
12
GND
37
INB6
13
VO6
36
INA7
14
VO7
35
INB7
15
VO8
34
INA8
16
VO9
33
INB8
17
VO10
32
INA9
18
GND
31
INB9
19
V
CC
30
INA10
20
A/B
29
INB10
21
NC
28
NC
22
NC
27
INA11
23
VO11
26
INB11
24
NC
25
NC = NO CONNECT
AD8511
TOP VIEW
(Not to Scale)
03237-012
NC
1
NC
2
NC
3
INA1
4
NC
48
NC
47
NC
46
NC
45
INB1
5
V
CC
44
INA2
6
GND
43
INB2
7
VO1
42
INA3
8
VO2
41
INB3
9
VO3
40
INA4
10
VO4
39
INB4
11
V
CC
38
INA5
12
GND
37
INB5
13
VO5
36
INA6
14
VO6
35
INB6
15
VO7
34
INA7
16
VO8
33
INB7
17
VO9
32
INA8
18
GND
31
INB8
19
V
CC
30
INA9
20
A/B
29
INB9
21
NC
28
NC
22
NC
27
NC
23
NC
26
NC
24
NC
25
NC = NO CONNECT
AD8509
TOP VIEW
(Not to Scale)
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/LFCSP packages
APPLICATION
LCD line inversion gamma references
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. The 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.
Figure 2. AD8509 and AD8511 48-Lead TSSOP (RV Suffix)
The AD8509 and AD8511 are specified over the −40°C to +85°C
temperature range. They are available in 48-lead, Pb-free TSSOP
packages in tape and reel. Additionally, the ADD8511 is available
in a 48-lead, Pb-free LFCSP package.
13
14
15
16
17
18
19
20
21
22
23
24
INA9
INB9
INA10
INB10
INA11
NC
INB11
VO11
NC
A/B
NC
V
CC
48
47
46
45
44
43
42
41
40
39
38
37
NC
NC
INB2
INA2
INB1
INA1
NC
VO1
V
CC
GND
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
INA3
INB3
INA4
INB4
INA5
INB5
INA6
INB6
INA7
INB7
INA8
INB8
NC = NO CONNECT
VO3
VO4
VO5
V
CC
GND
VO6
VO7
VO8
VO9
VO10
GND
35
VO236
34
33
32
31
30
29
28
27
26
25
AD8511
TOP VIEW
(Not to Scale)
PIN 1
INDICATOR
03237-011
FUNCTIONAL BLOCK DIAGRAM
03237-001
INA1
INB1
INA2
INB2
INA11
INB11
A/B
VO11
VO2
VO1
Figure 3. AD8511 48-Lead LFCSP
Figure 1.
