Clock Generator Lowers The Boom On Jitter April 14, 2008
With an eye on simplifying video equipment design, the LMH1982 clock generator razes clock output jitter to as low as 40 ps peak-to-peak, reportedly the lowest in the industry. In a 32-pin LLP measuring 5 mm x 5 mm, the device squeezes into compact video cameras, digital recorders, and a wide range of video editing and post-production equipment. It can replace discrete and FPGA PLLs with multiple VCXOs; only one external VCXO is required to operate the device. Operating from 3.3V and 2.5V supplies with a total power dissipation of 250 mW, the clock can generate two simultaneous SD and HD outputs and an output top of frame timing pulse. Additionally, the LMH1982 supports NTSC/525i, PAL/625i, 525p, 625p, 720p, 1080i, and 1080p timing. An I2C interface is on board for programming device registers and reading device status. Samples are available now with production set for May. Price is $24.95 each/100. NATIONAL SEMICONDUCTOR CORP., Santa Clara, CA. (800) 272-9959.
