The ADA4420-6 is a low cost video reconstruction filter specifically designed for consumer applications. It consists of six independent sixth-order Butterworth filters/buffers, three for standard definition (Y/C or CVBS) and three for high definition component signals (YPbPr or RGB). The ADA4420-6 operates from a single 5 V supply and has a low quiescent current of 32 mA, making it ideal for applications where power consumption is critical. A disable feature allows for further power conservation by reducing the supply current to less than 8 ?A typical when the device is not in use. Each channel features a transparent sync tip clamp, allowing ac coupling of the inputs without requiring dc restoration. The output drivers on the ADA4420-6 have rail-to-rail output capabilities with 6 dB gain. A built-in offset of 250 mV allows the outputs to be dc-coupled, eliminating the need for large coupling capacitors. Each output is capable of driving two 75 Ohm doubly terminated cables. The ADA4420-6 is available in a 16-lead QSOP and operates in the extended industrial temperature range of -40°C to +85°C.
Sixth-order filters
Transparent input sync tip clamp
-1 dB bandwidth of 26 MHz typical for HD
HD rejection @ 75 MHz: 48 dB typical
NTSC differential gain: 0.19%
NTSC differential phase: 0.76°
Rail-to-rail outputs
Low quiescent current: 32 mA typical
Disable feature
Output dc offset
Applications include Set-top boxes, DVD players and recorders, HDTVs, Projectors, Personal video recorders