lm2468ta

Manufacturer Part Numberlm2468ta
DescriptionMonolothic Triple 14ns High Gain Crt Driver
ManufacturerNational Semiconductor Corporation
lm2468ta datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
Page 1/9

Download datasheet (433Kb)Embed
Next
LM2468
Monolothic Triple 14nS High Gain CRT Driver
General Description
The LM2468 is an integrated high voltage CRT driver circuit
designed for use in color monitor applications. The IC con-
tains three high input impedance wide band amplifiers,
which directly drive the RGB cathodes of a CRT. Each
channel has its gain internally set to -20 and can drive CRT
capacitive loads as well as resistive loads present in other
applications, limited only by the package’s power dissipation.
The IC is packaged in an industry standard 9 lead TO-220
molded plastic package.
Features
n Higher gain to accommodate CMOS preamplifiers
Schematic Diagram
FIGURE 1. Simplified Schematic Diagram (One
Channel)
© 2000 National Semiconductor Corporation
n 0V to 3.75V input range
n Stable with 0-20pF capacitive loads and inductive
peaking networks
n Matched to the LM126X series preamplifier and
LM2479/2480 bias clamp
n Maintains standard LM243X Family Pinout which is
designed for easy PCB layout
n Convenient TO-220 staggered 9 lead package style
Applications
n Up to 1024 X 768 at 60 Hz (or 800 X 600 at 72/75 Hz)
n Pixel clock frequencies up to 50 MHz
n Monitors using video blanking
Connection Diagram
Note: Tab is at GND.
DS200135-1
NS package Number: TA09A
DS200135
December 2000
DS200135-2
FIGURE 2. Top View
Order Number: LM2468TA
www.national.com

lm2468ta Summary of contents

  • Page 1

    ... Convenient TO-220 staggered 9 lead package style Applications 1024 X 768 (or 800 X 600 at 72/75 Hz) n Pixel clock frequencies MHz n Monitors using video blanking Connection Diagram Note: Tab is at GND. DS200135-1 NS package Number: TA09A DS200135 December 2000 DS200135-2 FIGURE 2. Top View Order Number: LM2468TA www.national.com ...

  • Page 2

    Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Bias Voltage Input Voltage Storage Temperature Range, T STG < Lead ...

  • Page 3

    Typical Performance Characteristics 65V), Test Circuit - Figure 3 unless otherwise specified. FIGURE out FIGURE 5. Power Dissipation vs Frequency FIGURE 6. Speed vs Temperature (V = +80V , DS200135-4 in FIGURE 8. ...

  • Page 4

    THEORY OF OPERATION The LM2468 is a high voltage monolithic three channel CRT driver suitable for color monitor applications. The LM2468 operates with 80V and 12V power supplies. The part is housed in the industry standard 9-lead TO-220 molded plas- ...

  • Page 5

    APPLICATION HINTS (Continued) resistors for R1 will simplify finding the values needed for optimum performance in a given application. Once the opti- mum value is determined, the variable resistors can be replaced with fixed values. Effect of Load Capacitance Figure ...

  • Page 6

    APPLICATION HINTS www.national.com (Continued) 6 ...

  • Page 7

    APPLICATION HINTS (Continued) 7 www.national.com ...

  • Page 8

    APPLICATION HINTS www.national.com (Continued) FIGURE 13. NSC LM126X/246X Demo Board Layout 8 DS200135-17 ...

  • Page 9

    ... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted NS Package Number TA09A Order Number LM2468TA 2. A critical component is any component of a life support device or system whose failure to perform ...