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PDF LM1295 Data sheet ( Hoja de datos )

Número de pieza LM1295
Descripción DC Controlled Geometry Correction System for Continuous Sync Monitors
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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April 1999
LM1295
DC Controlled Geometry Correction System for
Continuous Sync Monitors
General Description
The LM1295 is specifically designed for use in a continuous
sync monitor. The injection-locked vertical oscillator oper-
ates from 50 Hz to 170 Hz, covering all known video moni-
tors. A differential output current is provided in order to pre-
vent ground interaction.
The IC provides two outputs composed of the summation of
DC controlled 1st and 2nd order output terms. The first out-
put corrects for EW pincushion and trapezoid. The second
corrects for parallelogram and bow.
A DC controlled output is provided for vertical dynamic focus
correction.
The IC is packaged in a 24-pin narrow DIP package and op-
erates on a single 12V power supply.
Features
n Vertical scanning frequency 50 Hz–170 Hz
n DC controlled correction term amplitudes
n Up to 125 kHz bandwidth for dynamic input signals
n Minimum external parts count
n Multiple IC connection for convergence applications
flexibility
n Stable vertical amplitude over temperature
n Compatible with the LM1291 Horizontal PLL in a H/V
system
n Dynamic vertical deflection correction for second anode
high voltage drop
n Both positive and negative going correction signals
Connection Diagram
DS012324-1
FIGURE 1. Order Number LM1295N
See NS Package Number N24C
© 1999 National Semiconductor Corporation DS012324
www.national.com

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LM1295 pdf
Typical Performance Characteristics TA = 25˚C, F = 100 Hz, VHeight = 4V, VDyn Height = 3V, Test
Circuit — Figure 2
H Dyn Width Output (Pin 9)
H Dyn Width Output (Pin 9)
H Dyn Width Output (Pin 9)
DS012324-10
H Dyn Width Output (Pin 9)
DS012324-11
H Dyn Ctr Output (Pin 14)
DS012324-13
H Dyn Ctr Output (Pin 14)
DS012324-14
DS012324-15
5
DS012324-16
www.national.com

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LM1295 arduino
Physical Dimensions inches (millimeters) unless otherwise noted
24-Lead (0.300" Wide) Molded Dual-In-Line Package
Order Number LM1295N
NS Package Number N24C
LIFE SUPPORT POLICY
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
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
www.national.com
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
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.

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