DescriptionThe VP5511A converts digital Y, Cr, Cb, data into analog NTSCJPAL composite video and S-video signals.The outputs are capable of driving doubly terminated 75 ohm loads with standard video levels.The device accepts data inputs complying with CCIR Recommendation 601 and 656. The data is time multiplexed on an 8 bit bus at 27MHz and is formatted as Y, Cr, Y, Cb(i.e. 4:2:2). The video blanking and sync information from REC 656 is included in the data stream when the VP5511A is working in slave mode.
Features of the VP5511A are:(1)converts Y, Cr, Cb data to analog composite video and S-video; (2)supports CCIR recommendations 601 and 656; (3)all digital video encoding; (4)selectable masterlslave mode for sync signals; (5)switchable chrominance bandwidth; (6)switchable pedestal with gain compensation; (7)SMPTE 170M NTSC or CCIR 624 PAL compatible outputs; (8)GENLOCK mode; (9)line 21 Closed Caption encoding.
The absolute maximum ratings of the VP5511A can be summarized as:(1)voltage on any non power pin:-0.3 to Vdd+0.3 V; (2)supply voltage Vdd,AVDD:-0.3 to 7.0V; (3)storage temperature :-55 to +150°C; (4)ambient operating temperature:0 to 70°C.Stresses exceeding these listed under Absolute Maximum Ratings may inducefailure. Exposureto Absolute Maximum Ratings for extended periods may reduce reliability. Functionality at or above these conditions is not implied.The VP5511A contained three 9 bit digital to analog converters which produce the analog video signals. The DACs use a current steering architecture in which bit currents are routed to one of two outputs; thus the DAC has true and complementary outputs. The use of identical current sources and current steering their outputs means that monotonicity is guaranteed. An on-chip voNage reference. of 1.0V (typ.) provides thg necessary biasing. However, the VP5511A may be used in applications where an external 1 V reference is provided on the VREF pin, to adjust the video levels. In this case, the external reference should be temperature compensated and provide a low impedance output.
VP5511A Data Sheet
