4
9- and 11-Channel, Muxed Input
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
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. 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 −40°C to +85°C
temperature range. They are available in 48-lead, thin shrink
small outline (TSSOP), surface-mount, Pb-free packages in tape
and reel.
LCD Reference Buffers
AD8509/AD8511
FUNCTIONAL BLOCK DIAGRAM
INA1
INB1
INA2
INB2
INA11
INB11
A/B
Figure 1.
PIN CONFIGURATIONS
NC
1
NC
2
NC
3
INA1
4
INB1
5
INA2
6
INB2
7
8
INA3
9
INB3
10
INA
11
INB4
INA5
INB5
INA6
INB6
INA7
INB7
INA8
INB8
INA9
INB9
AD8509
TOP VIEW
12
(Not to Scale)
13
14
15
16
17
18
19
20
21
22
NC
23
NC
24
NC
NC = NO CONNECT
Figure 2. AD8509 and AD8511 48-Lead TSSOP (RU Suffix)
48
NC
NC
47
NC
46
NC
45
V
44
CC
43
GND
42
VO1
41
VO2
40
VO3
VO4
39
V
38
CC
37
GND
36
VO5
35
VO6
34
VO7
33
VO8
32
VO9
GND
31
V
30
CC
29
A/B
28
NC
27
NC
26
NC
25
NC
NC
INA1
INB1
INA2
INB2
INA3
INB3
INA4
INB4
INA5
INB5
INA6
INB6
INA7
INB7
INA8
INB8
INA9
INB9
INA10
INB10
NC
INA11
INB11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
NC = NO CONNECT
VO1
VO2
VO11
03237-001
AD8511
TOP VIEW
(Not to Scale)
48
NC
VO1
47
NC
46
NC
45
V
44
CC
43
GND
42
VO2
41
VO3
40
VO4
VO5
39
V
38
CC
37
GND
36
VO6
35
VO7
34
VO8
33
VO9
VO10
32
GND
31
V
30
CC
29
A/B
28
NC
27
NC
26
VO11
25
NC
03237-002
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
Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved.
www.analog.com
AD8509/AD8511
TABLE OF CONTENTS
Specifications..................................................................................... 3
Electrical Characteristics............................................................. 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Typical Performance Characteristics ............................................. 5
Applications....................................................................................... 7
Outline Dimensions ......................................................................... 8
Ordering Guide............................................................................. 8
REVISION HISTORY
1/05—Rev. A to Rev. B
Changed Maximum Operating Voltage...........................Universal
Change to Features List.................................................................... 1
Changes to Specifications Table...................................................... 3
Changes to Ordering Guide............................................................ 8
9/04—Rev. 0 to Rev. A
Format Updated..................................................................Universal
Added Pb-Free Part............................................................Universal
Changed Temperature Range............................................Universal
Changed Applications Section........................................................ 1
Changes to Ordering Guide............................................................ 8
10/97—Revision 0: Initial Version
Rev. B | Page 2 of 8
AD8509/AD8511
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VS = 5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
Input Bias Current I
OS
B
Voltage Gain AVO 0.985 V/V
OUTPUT CHARACTERISTICS
Output Voltage High V
Output Voltage Low V
OH
OL
Output Short-Circuit Current ISC 120 350 mA
POWER SUPPLY
Load Regulation VIN = 0.5 V − 4.5 V, I
V
Supply Current I
I
Supply Voltage Range V
SY
SY
S
DYNAMIC PERFORMANCE
Slew Rate CL = 15 pF 7 V/µs
R
Settling Time t
S
LOGIC INPUT CHARACTERISTICS
Input Current Low I
Input Current High I
Input Voltage Low V
IL
IH
IL
Input Voltage High VIH 2.0 V
20 mV
50 nA
I
= +20 mA 4.8 V
LOAD
I
= −20 mA 200 mV
LOAD
= 20 mA 7 mV
SOURCE
= 0.5 V − 4.5 V, I
IN
= 20 mA 7 mV
SINK
AD8509, VIN = 2.5 V 8.5 mA
AD8511, VIN = 2.5 V 10 mA
3.3 6.5 V
= 250 Ω 6.2 V/µs
L
IDC = 13 mA (sink/source) 3 6 µs
1.0 µA
1.5 µA
0.8 V
Rev. B | Page 3 of 8
AD8509/AD8511
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Supply Voltage 7 V
Input Voltage GND to V
Storage Temperature Range
RU Package
Operating Temperature Range
Junction Temperature Range
RU Package
Lead Temperature Range
(Soldering, 60 sec)
−65°C to +150°C
−40°C to +85°C
−65°C to +150°C
300°C
Table 4. MUX Function
A/B Select (Pin 29) Input
Logic High INAx
Logic Low INBx
S
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; the functional operation of the device at these or
any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may
affect device reliability.
Table 3.
Package Type
48-lead Pb-free TSSOP (RU) 115 42 °C/W
1
θJC
θ
JA
Unit
1
θJA is specified for the worst-case conditions, that is, θJA is specified for
devices soldered in circuit boards for surface-mount packages.
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.
Rev. B | Page 4 of 8
AD8509/AD8511
TYPICAL PERFORMANCE CHARACTERISTICS
10
9
8
7
6
5
SUPPLY CURRENT (mA)
4
3
–35 –15 5 25 45 65 85 105
TEMPERATURE (°C)
VS = 5V
= NO LOAD
R
L
Figure 3. Supply Current vs. Temperature
10
9
8
7
6
5
4
3
SUPPLY CURRENT (mA)
2
1
0
054321
AD8509
COMMON-MODE VOLTAGE (V)
AD8511
VS = 5V
= 25°C
T
A
= NO LOAD
R
L
Figure 4. Supply Current vs. Common-Mode Voltage
1k
VS = 5V
= 25°C
T
A
100
SOURCE
03237-003
03237-004
VS = 5V
T
= 25°C
A
= NO LOAD
R
L
C
= 15pF
L
620mV 2.5V
Figure 6. Large Signal Transient Response—Rising
VS = 5V
T
= 25°C
A
RL = NO LOAD
C
= 15pF
L
620mV 2.5V
Figure 7. Large Signal Transient Response—Falling
VS = 5V
T
= 25°C
A
R
= 250Ω
L
C
= 15pF
L
03237-006
03237-007
SINK
10
OUTPUT VOLTAGE (mV)
∆
1
0.1 100101
LOAD CURRENT (mA)
Figure 5. Output Voltage to Supply Rail vs. Load Current
03237-005
Rev. B | Page 5 of 8
620mV 2.5V
Figure 8. Large Signal Transient Response—Rising
03237-008
AD8509/AD8511
VS = 5V
T
= 25°C
A
R
= 250Ω
L
C
= 15pF
L
620mV 2.5V
03237-009
Figure 9. Large Signal Transient Response—Falling
Rev. B | Page 6 of 8
AD8509/AD8511
APPLICATIONS
The AD8509 and AD8511 are CMOS buffers with A/B inputs,
which are used 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
very large resistor ladders to be used to save supply current. A
guaranteed value of 50 nA is much higher than actual values
and is limited by leakage in the test system.
Buffer outputs are designed to drive resistive loads. They are
also stable with capacitive loads, so no resistors should be used
in series with these outputs to attain the best display performance. Outputs have high slew rates and 6 µs settling times. Each
output can deliver a minimum of 120 mA, assuring fast response
to varying loads.
The AD8509 is a 9-channel buffer and is similar to the LMC6009
in functionality. The AD8511 is an 11-channel buffer similar to
the CL-FP6131. However, the control to select either 9- or
11-channel operation, the EN_11 pin of the CL-FP6131, is not
available on the AD8511. If 9-channel operation is desired, use
the AD8509.
Power supply pins on the AD8509 and AD8511 have multiple
ground and V
that these buffers can deliver, it is strongly recommended that
all of the ground and V
pins be suitably bypassed.
connections. Because of the high peak currents
CC
pins be connected, and that the VCC
CC
Rev. B | Page 7 of 8
AD8509/AD8511
OUTLINE DIMENSIONS
12.60
12.50
12.40
25
1.20 MAX
SEATING
PLANE
6.20
6.10
6.00
8.10 BSC
24
0.75
0.60
0.45
0.20
0.09
8°
0°
0.15
0.05
PIN 1
48
1
0.50
BSC
0.27
0.17
COMPLIANT TO JEDEC STANDARDS MO-153ED
Figure 10. 48-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-48)
Dimensions shown in millimeters
ORDERING GUIDE
1
Model
AD8509ARU-REEL −40°C to +85°C 48-Lead Thin Shrink Small Outline Package RU-48
AD8509ARUZ-REEL
2
AD8511ARU-REEL −40°C to +85°C 48-Lead Thin Shrink Small Outline Package RU-48
AD8511ARUZ-REEL2 −40°C to +85°C 48-Lead Thin Shrink Small Outline Package RU-48
1
All models only available in 2,500-piece reels.
2
Z = Pb-free part.
Temperature Range Package Description Package Option
−40°C to +85°C 48-Lead Thin Shrink Small Outline Package RU-48
© 2005 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C03237–0–1/05(B)
Rev. B | Page 8 of 8
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