Bt21820 MSPS Monolithic CMOS8-bit Flash Video A/D Converter

The Bt218 is an 8-bit ?ash A/D converter designed specifically for video digitizing applications. A Flash converter topology is used with 256 high-speed comparators in parallel to digitize the analog input signal.Flexible input ranges enable NTSC and CCIR video signals to be digitized without requiring a video amplier.The TTL-compatible output data and OVERFLOW are registered synchronously with the clock signal. The OE* three-states the D[7:0] outputs asynchronously to CLOCK.The ZERO input is used to zero the comparators, while CLAMP allows DC restoration of an AC-coupled video signal (by forcing the VIN input to the volt-age on the LEVEL pin).The Bt218 contains 256 high-speed comparators, a 255-to-8 encoder, an out- put register, and a resistor divider network. Of the 256 comparators, 255 are used to digitize the analog signal; the additional comparator is used to generate the OVERFLOW bit.

Parts are new (never been used) and are in their original packaging.