lmc6009 National Semiconductor Corporation, lmc6009 Datasheet

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lmc6009

Manufacturer Part Number
lmc6009
Description
9 Channel Buffer Amplifier For Tft-lcd
Manufacturer
National Semiconductor Corporation
Datasheet

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© 1999 National Semiconductor Corporation
LMC6009
9 Channel Buffer Amplifier for TFT-LCD
General Description
The LMC6009 is a CMOS integrated circuit that buffers 9 ref-
erence voltages for gamma correction in a Thin Film Transis-
tor Liquid Crystal Display (TFT-LCD). Guaranteed to operate
at both 3.3V and 5V supplies, this integrated circuit contains
nine, independent unity gain buffers that can source 130 mA
into a capacitive load without oscillation.
The LMC6009 is useful for buffering gamma voltages into
column drivers that employ the resistor-divider architecture.
High output current capability and fast settling characteristics
of this device improve display quality by minimizing rise time
errors at the outputs of the column driver. The integration of
nine buffers and a multiplexer eliminates the need for dis-
crete buffers and a separate multiplexer (MUX) chip on the
panel.
The LMC6009 is available in 48-pin surface mount TSSOP.
Application in VGA/SVGA TFT-LCD
Ordering Information
48-pin TSSOP
Package
DS012533
Temperature Range
−20˚C–+75˚C
LMC6009MT
LMC6009MTX
Features
n Number of inputs
n 3.3V and 5V operation
n Supply current
n Settling time
n A/B channel inputs for asymmetrical Gamma
n Number of outputs
n Number of control inputs
n Built-in thermal shutdown protection
Applications
n VGA/SVGA TFT-LCD drive circuits
n Electronic Notebooks
n Electronic Games
n Personal Communication Devices
n Personal Digital Assistants (PDA)
Tape and Reel
Transport Media
NSC Drawing
MTD48
DS012533-1
www.national.com
May 1999
3.5 mA
3 µs
18
9
1

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lmc6009 Summary of contents

Page 1

... LMC6009 9 Channel Buffer Amplifier for TFT-LCD General Description The LMC6009 is a CMOS integrated circuit that buffers 9 ref- erence voltages for gamma correction in a Thin Film Transis- tor Liquid Crystal Display (TFT-LCD). Guaranteed to operate at both 3.3V and 5V supplies, this integrated circuit contains nine, independent unity gain buffers that can source 130 mA into a capacitive load without oscillation ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance Input Voltage Supply Voltage ( Operating Temperature Storage Temperature Range 3V DC Electrical Characteristics Unless ...

Page 3

DC Electrical Characteristics Unless otherwise specified, all limits are guaranteed for T Symbol Parameter V Load Regulation L V A/B Switch Logic Voltage, High IH V A/B Switch Logic Voltage, Low IL I A/B Switch Logic Current, High IH ...

Page 4

... AC Electrical Characteristics (Continued) FIGURE 2. FIGURE 3. A1 Source only A2–A4 Sink/Source Description of Pins; LMC6009 Pin 1 NC Pin 2 NC Pin 3 NC Pin (A) Pin (B) Pin (A) Pin (B) Pin (A) Pin (B) Pin (A) ...

Page 5

... LMC6009 eliminates the need for nine external switches or an 18-to-9 multiplexer. DS012533-8 Since the buffers in the LMC6009 draw extremely low bias current (1.5 µA max), large resistance values can be used in the reference voltage string. This allows the power dissipa- tion in the gamma reference circuit to be minimized. The ...

Page 6

... Voltage at node V V VREF(n+1) = Column driver input resistance between R CD VREFn and VREF(n+1) Since the LMC6009 is capable of sourcing 80 mA, the pixel charging time is primarily limited only by the length of the time constant. To implement a high quality display column drivers that allow the shortest possible time constant (lower values are desirable ...

Page 7

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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