Texas Instruments’ new LMH1256 is claimed to be the industry’s first 12G Ultra HD SDI reclocker with integrated signal conditioning. The four-channel device doubles the transmission rate of competing 6G devices, allowing broadcast video equipment to capture, record and play back 4K video signals at 60Hz over a single link of coaxial cable.
It can deliver multi-rate operation at transmission speeds from 270Mbps to 11.868Gbps, and recovers the serial clock and retimes the serial data stream to suppress accumulated jitter. It has an integrated eye monitor to detect a faulty signal or cable, using an on-chip oscilloscope probe.
The LMH1256 reclocker is aimed at video equipment manufacturers and is designed to work with 4K broadcast video systems such as digital video routers, switches, encoders/decoders, modular cards, multi-viewers and display monitors. Its power consumption is only about 200mW, so that system designers can pack more channels and features into smaller frames.
TI demonstrated the unit at IBC operating with an Altera Stratix V GX development board. An evaluation module, which costs $699, is available to help accelerate the development of 4K UHD-SDI video systems. An IBIS-AMI model is also available to verify board signal integrity requirements. Samples of the LMH1256 are now available in a 48-pin, 7mm x 7mm QFN package, with production volumes expected in 1Q 2104. Pre-production pricing is currently set at $35 in 1000-unit quantities.
By David Fox