LM2405 Monolithic Triple 7 ns CRT Driver
August 1999
LM2405
Monolithic Triple 7 ns CRT Driver
General Description
The LM2405 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 chan-
nel has its gain internally set at −14 and can drive CRT ca-
pacitive loads as well as resistive loads presented by other
applications, limited only by the package’s power dissipation.
The IC is packaged in an industry standard 11 lead TO-220
molded plastic power package. See thermal considerations
on page 5.
n
Output swing capability:
50 V
PP
for V
CC
= 80
40 V
PP
for V
CC
= 70
30 V
PP
for V
CC
= 60
n
Pinout designed for easy PCB layout
n
0V to 6V input range
n
Stable with 0 pF–20 pF capactive loads
n
Convenient TO-220 staggered lead package style
Applications
n
CRT driver for 1280 x 1024 (Non-interlaced) and XGA
display resolution color monitors
n
Pixel clock frequency up to 130 MHz
n
Monitors using video blanking
Features
n
Rise/fall times typically 7 ns with 8 pF load
Schematic and Connection Diagram
DS012682-2
Tab is at GND
Top View
Order Number LM2405T
DS012682-1
FIGURE 1. Simplified Schematic Diagram (One
Channel)
© 1999 National Semiconductor Corporation
DS012682
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
