This application includes digitized standard definition TV, such as the 4:2:2, and some high definition TV formats as well.
The bandwidth for these applications should be about one and one half times the data rate as clocked. This is after the encoding.
- If you have the non-repeat zero coding for HDTV then the clock rate actually comes out of the device divided by two. The encoding reduces the zero crossings to make the data easier to drive.
- Another key specification is settling time. The settling time must be kept less than approximately one tenth of the clock cycle and to within about 20% of the peak voltage.
- This settling time will give you a clean eye-diagram on the digital data. You do not want amplifier delay and ringing to close that eye. This will show up as a clean pulse response.
It's True! The following National Semiconductor part is ideal for these types of applications: LMH6702.
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Tip It is very important that you look at the amplitude of the signal that you will be driving and compare that to the bandwidth of the part that you choose.
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