Product category:
Analogue and Mixed Signal ICs
News Release from: Intersil | Subject: ISL59830
Edited by the Electronicstalk Editorial
Team on 26 July 2005
Video driver generates its own negative
supply
A novel video driver provides an elegant solution to a real world analogue problem.
Intersil's ISL59830 video driver provides an elegant solution to a real world analogue problem The video driver is often the only product in a design that still requires a negative supply rail where DC accuracy is required
This article was originally published on Electronicstalk on 8 Jan 2001 at 8.00am (UK)
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By generating its own negative supply, the ISL59830 makes it possible to completely remove the higher cost of the negative supply rail and maintain DC accuracy.
The ISL59830 triple video driver runs off a single 3.3V supply, and because of its internally generated negative supply, external coupling capacitors are not needed.
The elimination of the external capacitors and need for a negative supply rail reduce overall system costs.
This makes the device perfect for applications driving RGB or YPbPr video signals.
Video drive architectures typically use one of two coupling schemes - AC or DC.
A system using AC coupling requires large external capacitors, but does not need a negative supply rail.
A system using DC coupling does not need these large capacitors, but requires a negative supply rail.
The ISL59830 gives designers the best of both schemes by generating the negative supply on chip and allowing DC coupling of the video signal.
The ISL59830 features an integrate 6dB gain for all three channels and can drive doubly terminated 75ohm loads.
The 300MHz -3dB bandwidth device also has a reference voltage pin that allows the user to level shift the signal above or below ground to match an external reference.
Intersil's ISL59830 is available now in a 16-lead QSOP lead-free finish (RoHS compliant).
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