Implementation of a DirectDrive Video Filter Amplifier's Negative Charge Pump and Analog Switch in Audio/Video Applications
The MAX9503/MAX9505 DirectDrive video filter amplifiers integrate an analog switch (MAX9505 only) and a negative charge pump. These devices operate from a single 2.7V to 3.6V power supply. They can be directly connected to the output of the video DAC and set the black level of video signal to ground at its output. They eliminate the extra negative voltage supply and large output DC-blocking capacitors, thus saving cost and board space. As this application note explains, the negative charge pump and the analog switch can be used to improve performance in audio/video applications.
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