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FEATURES Single-Supply Operation: 3.3 V to 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 APPLICATIONS LCD Driver
9- and 11-Channel, Muxed Input LCD Reference Drivers AD8509/AD8511
FUNCTIONAL BLOCK DIAGRAM
IN A1 IN B1 IN A2 IN B1 V02 V01
IN A11 IN B11 A/B V011
GENERAL DESCRIPTION
The AD8509 is a 9-channel (AD8511 an 11-channel) LCD reference driver 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 -20C to +85C temperature range. They are available in 48-lead thin shrink small outline (TSSOP) surface mount packages in tape and reel.
PIN CONFIGURATIONS 48-Lead TSSOP (RU Suffix)
NC 1 INA1 2 INB1 3 INA2 4 INB2 5 INA3 6 INB3 7 INA4 8 INB4 9 INA5 10 INB5 11 INA6 12
48 NC 47 VO1 46 NC 45 NC 44 VCC 43 GND 42 VO2 41 VO3 40 VO4 39 VO5
NC 1 NC 2 NC 3 INA1 4 INB1 5 INA2 6 INB2 7 INA3 8 INB3 9 INA4 10 INB4 11 INA5 12
48 NC 47 NC 46 NC 45 NC 44 VCC 43 GND 42 VO1 41 VO2 40 VO3 39 VO4
AD8511
38 VCC 37 GND
TOP VIEW INB6 13 (Not to Scale) 36 VO6 INA7 14 INB7 15 INA8 16 INB8 17 INA9 18 INB9 19 INA10 20 INB10 21 NC 22 INA11 23 INB11 24 35 VO7 34 VO8 33 VO9
37 GND TOP VIEW INB5 13 (Not to Scale) 36 VO5 INA6 14 INB6 15 INA7 16 INB7 17 INA8 18 INB8 19 INA9 20 INB9 21 NC 22 NC 23 NC 24 35 VO6 34 VO7 33 VO8 32 VO9 31 GND 30 VCC 29 A/B 28 NC 27 NC 26 NC 25 NC
AD8509
38 VCC
32 VO10 31 GND 30 VCC 29 A/B 28 NC 27 NC 26 VO11 25 NC
NC = NO CONNECT
NC = NO CONNECT
REV. 0
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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 (c) Analog Devices, Inc., 1997
AD8509/AD8511-SPECIFICATIONS
ELECTRICAL CHARACTERISTICS (V =
S
5 V, TA =
25 C, unless otherwise noted)
Min Typ Max 20 50 0.985 Units mV nA V/V V mV mA mV mV mA mA V/s V/s s A A V V
Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Voltage Gain OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Output Short Circuit Current POWER SUPPLY Load Regulation Load Regulation Supply Current Supply Current DYNAMIC PERFORMANCE Slew Rate Slew Rate Settling Time LOGIC INPUT CHARACTERISTICS Input Current Low Input Current High Input Voltage Low Input Voltage High
Specifications subject to change without notice.
Symbol VOS IB AVO VOH VOL ISC
Conditions
ILOAD = +20 mA ILOAD = -20 mA
4.8 200 120 350 7 7 8.5 10 7 6.2 3
LCD09 LCD11
VIN = 0.5 V - 4.5 V , ISOURCE = 20 mA VIN = 0.5 V - 4.5 V , ISINK = 20 mA ISY, VIN = 2.5 V ISY, VIN = 2.5 V CL = 15 pF RL = 250 IDC = 13 mA (Sink/Source)
tS IIL IIH VIL VIH
6 1.0 1.5 0.8
2.0
ABSOLUTE MAXIMUM RATINGS*
ORDERING GUIDE
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to VS Storage Temperature Range RU Package . . . . . . . . . . . . . . . . . . . . . . 65C to 150C Operating Temperature Range AD8509A/AD8511A . . . . . . . . . . . . . . . . . 20C to 85C Junction Temperature Range RU Package . . . . . . . . . . . . . . . . . . . . . . . 65C to 150C Lead Temperature Range (Soldering, 60 sec) . . . . . . . 300C
*Stresses above those listed under Absolute Maximum Ratings may cause perma nent 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.
Model
Temperature Range
Package Description
Package Options
AD8509ARU* -20C to +85C AD8511ARU* -20C to +85C
* Available in 2,000 piece reels only.
48-Lead TSSOP RU-48 48-Lead TSSOP RU-48
Table I. MUX Function
A/B Select (Pin 29) Logic HI Logic LOW
Input INAx INBx
Package Type 48-Lead TSSOP (RU)
JA
*
JC
Units C/W
115
42
NOTE * JA is specified for the worst case conditions, i.e., JA specified for device soldered in circuit board for surface mount packages.
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 the AD8509/AD8511 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.
WARNING!
ESD SENSITIVE DEVICE
-2-
REV. 0
Typical Performance Characteristics-AD8509/AD8511
10 9 VS = +5V RL = NO LOAD 10 9 8 VS = +5V TA = +25 C RL = NO LOAD AD8511 1k VS = +5V TA = +25 C
SUPPLY CURRENT - mA
8 7 6 5 4
SUPPLY CURRENT - mA
7 6 5 4 3 2 1
OUTPUT VOLTAGE - mV
100 SOURCE SINK 10
AD8509
3 -35
-15
5 25 45 65 TEMPERATURE - C
85
105
0
0
1 2 3 4 COMMON-MODE VOLTAGE - V
5
1 0.1
1 10 LOAD CURRENT - mA
100
Figure 1. Supply Current vs. Temperature
Figure 2. Supply Current vs. Common-Mode Voltage
Figure 3. Output Voltage to Supply Rail vs. Load Current
VS = +5V TA = +25 C RL = NO LOAD CL = 15pF
VS = +5V TA = +25 C RL = NO LOAD CL = 15pF
VS = +5V TA = +25 C RL = 250 CL = 15pF
620mV
2.5V
620mV
2.5V
620mV
2.5V
Figure 4. Large Signal Transient Response - Rising
Figure 5. Large Signal Transient Response - Falling
Figure 6. Large Signal Transient Response - Rising
VS = +5V TA = +25 C RL = 250 CL = 15pF
620mV
2.5V
Figure 7. Large Signal Transient Response - Falling
REV. 0
-3-
AD8509/AD8511
APPLICATIONS
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 s settling times. Each output is capable of delivering a minimum of 120 mA, assuring fast response to varying loads.
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
48-Lead TSSOP (RU Suffix)
0.488 (12.4) 0.496 (12.6)
48
25
0.236 (6.0) 0.244 (6.2)
1
24
0.006 (0.15) 0.002 (0.05)
PIN 1 0.0433 (1.10) MAX 0.0197 (0.5) BSC 0.0116 (0.27) 0.0067 (0.17) 0.0079 (0.20) 0.0035 (0.090)
0.319 (8.1)
SEATING PLANE
8 0
0.028 (0.70) 0.020 (0.50)
-4-
REV. 0
PRINTED IN U.S.A.
C3237-8-10/97
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, allowing 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.
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 VCC connections. Because of the high peak currents that these buffers can deliver, it is strongly recommended that all be connected, and that the VCC pins be suitably bypassed.

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