LM1295
LM1295 is DC Controlled Geometry Correction System manufactured by National Semiconductor.
Description
The LM1295 is specifically designed for use in a continuous sync monitor. The injection-locked vertical oscillator operates from 50 Hz to 170 Hz, covering all known video monitors. A differential output current is provided in order to prevent ground interaction. The IC provides two outputs posed of the summation of DC controlled 1st and 2nd order output terms. The first output 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 operates on a single 12V power supply.
Features n n n n n n n n n Vertical scanning frequency 50 Hz- 170 Hz DC controlled correction term amplitudes Up to 125 k Hz bandwidth for dynamic input signals Minimum external parts count Multiple IC connection for convergence applications flexibility Stable vertical amplitude over temperature patible with the LM1291 Horizontal PLL in a H/V system Dynamic vertical deflection correction for second anode high voltage drop 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
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Absolute Maximum Ratings (Notes 1, 3)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Input Voltage (DC, pins 2, 4, 6, 10, 11, 12, 13, 15) Input Voltage (AC, Pin 4) Power Dissipation (Note 4) (Above 25˚C Derate Based on θJA and TJ) Thermal Resistance (θJA) Junction Temperature (TJ) 15V 5V 5 VPP 1.8W 70˚C/W 150˚C
ESD Susceptibility (Note 5) Storage Temperature Lead Temperature (Soldering, 10 sec.)
1.8 k V
- 65˚C to +150˚C 265˚C
Operating Ratings (Note 2)
Operating Temperature Range Supply Voltage (VCC) Input Voltage (DC, pins 2, 4, 6, 10, 11, 12, 13, 15) Input Voltage (AC, pin 4)
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