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LM1237 pdf,LM1237 datasheet
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2008-09-17
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LM1237
150 MHz I2C Compatible RGB Preamplifier with Internal
254 Character OSD and 4 DACs
General Description
The LM1237 pre-amp is an integrated CMOS CRT preamp.
It has an I2C compatible interface which allows control of all
the parameters necessary to directly setup and adjust the
gain and contrast in the CRT display. Brightness and bias
can be controlled through the DAC outputs which are well
matched to the LM2479 and LM2480 integrated bias clamp
ICs. The LM1237 preamp is also designed to be compatible
with the LM246x high gain driver family.
Black level clamping of the video signal is carried out directly
on the AC coupled input signal into the high impedance
preamplifier input, thus eliminating the need for additional
clamp capacitors. Horizontal and vertical blanking of the
outputs is provided. Vertical blanking is optional and its
duration is register programmable.
The IC is packaged in an industry standard 24 lead DIP
molded plastic package.
150 MHz I2C Compatible RGB Preamplifier with Internal
254 Character OSD and 4 DACs
General Description
The LM1237 pre-amp is an integrated CMOS CRT preamp.
It has an I2C compatible interface which allows control of all
the parameters necessary to directly setup and adjust the
gain and contrast in the CRT display. Brightness and bias
can be controlled through the DAC outputs which are well
matched to the LM2479 and LM2480 integrated bias clamp
ICs. The LM1237 preamp is also designed to be compatible
with the LM246x high gain driver family.
Black level clamping of the video signal is carried out directly
on the AC coupled input signal into the high impedance
preamplifier input, thus eliminating the need for additional
clamp capacitors. Horizontal and vertical blanking of the
outputs is provided. Vertical blanking is optional and its
duration is register programmable.
The IC is packaged in an industry standard 24 lead DIP
molded plastic package.
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