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AD8509ARU-REEL
9-Channel, Multiplexed Input, LCD Driver
9- and 11-Channel, Muxed Input
LCD Reference Buffers
Rev. A
FEATURES
Single-supply operation: 3.3 V to 5.5 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
APPLICATIONS
LCD line inversion gamma references
GENERAL DESCRIPTION The AD8509 is a 9-channel (AD8511 an 11-channel) LCD
reference buffer designed to drive 64 gray scale column drivers.
Each buffer has an A/B input used to select between two
voltages for LCD displays. These buffers are used to drive the
resistor ladders of LCD column drivers for gamma correction.
These LCD drivers have higher slew rates and output drive
current 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.
FUNCTIONAL BLOCK DIAGRAM INA1
INB1
INA2
INB2
INA11
INB11
A/B
VO11
VO2
VO1
Figure 1.
PIN CONFIGURATIONS
NC = NO CONNECTNC
VO1
VCC
GND
VO2
VO3
VO4
VO5
VCC
GND
VO6
VO7
VO8
VO9
VO10
GND
VCC
A/B
INA1
INB1
INA2
INB2
INA3
INB3
INA4
INB4
INA5
INB5
INA6
INB6
INA7
INB7
INA8
INB8
INA9
INB9
INA10
VO11
INB10
INA11
INB11
NC = NO CONNECTNC
VCC
GND
VO1
VO2
VO3
VO4
VCC
GND
VO5
VO6
VO7
VO8
VO9
GND
VCC
A/B
INA1
INB1
INA2
INB2
INA3
INB3
INB4
INA5
INB5
INA6
INB6
INA7
INB7
INA8
INB8
INA9
INB903237-002
Figure 2. AD8509 and AD8511 48-Lead TSSOP (RU Suffix)
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
9/04—Changed from Rev. 0 to Rev. A Format Updated..................................................................Universal
Added Pb-free part.............................................................Universal
Changed Temperature Range............................................Universal
Changed Applications Section........................................................1
Updated Ordering Guide.................................................................8
10/97—Revision 0: Initial Version SPECIFICATIONS
ELECTRICAL CHARACTERISTICS VS = 5 V, TA = 25°C, unless otherwise noted.
Table 1. ABSOLUTE MAXIMUM RATINGS
Table 2. 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.
θJA is specified for the worst-case conditions, that is, θJA specified for device
soldered in circuit board for surface-mount packages.
Table 3. MUX Function
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.
TYPICAL PERFORMANCE CHARACTERISTICS –35–15525456585105TEMPERATURE (°C)
CURRE
NT (mA)
Figure 3. Supply Current vs. Temperature
054321COMMON-MODE VOLTAGE (V)
CURRE
NT (mA)
Figure 4. Supply Current vs. Common-Mode Voltage
1000.1100101LOAD CURRENT (mA)
OUTPUT VOLTAGE (mV)Figure 5. Output Voltage to Supply Rail vs. Load Current
03237-006
Figure 6. Large Signal Transient Response—Rising
03237-007
Figure 7. Large Signal Transient Response—Falling
Figure 8. Large Signal Transient Response—Rising
Figure 9. Large Signal Transient Response—Falling
