Product category: Communications ICs (Wired)
News Release from: National Semiconductor | Subject: LMH0046 etc
Edited by the Electronicstalk Editorial Team on 21 April 2006
Serialisers drive studio advances
National Semiconductor has released six serial digital interface (SDI) products for professional broadcast video applications.
National Semiconductor has released six serial digital interface (SDI) products for professional broadcast video applications The new products each represent unique industry firsts, including the smallest and lowest power high-definition/standard definition (HD/SD) reclocker, the first dual HD/SD cable driver and the lowest jitter HD/SD multirate serialiser
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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National has optimised all of these new SDI products to perform to Society of Motion Picture and Television Engineers (SMPTE) standards, which demand ultraclean low-jitter signal transmission.
In a tiny package that is one-third the sise of competitors' solutions, National's new LMH0046 is the industry's smallest and lowest power 3.3V HD/SD reclocker.
It leverages an ultraclean data recovery technique to reduce jitter on incoming data streams.
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Dual-differential reclocked outputs and an optional low-jitter data-rate clock maximise designer flexibility.
A single 27MHz reference and externally terminated inputs that allow for much smaller AC coupling capacitors contribute to system cost savings.
National's LMH0202 is the industry's first dual HD/SD multirate cable driver.
Packaged in a small TSSOP, the LMH0202 consumes approximately the same board area as a single cable driver in an 8-pin SOIC package.
By replacing two single cable drivers with one LMH0202, designers can reduce chip count, conserve board area, shorten trace lengths and lower system cost.
In addition, National expands its adaptive cable equaliser family with the introduction of two new SMPTE-compliant equalisers.
The LMH0024 is the industry's lowest-power SD adaptive cable equaliser, with 25% lower power consumption than competitors' products.
The LMH0044 is the industry's lowest power multi-rate adaptive cable equaliser in a very small LLP package.
Other new products include the industry's lowest jitter HD/SD serialiser and an industrial-strength HD-SDI cable driver.
Fjord Media, a maker of advanced systems for multiformat routing, optical transport, signal processing and distribution, selected National's serial digital interface products for Fjord's Free-4 open standard platform video routers.
"It was important to us that the vendor provides a complete HD and SD video portfolio and offer strong support", said Geir Thomassen, director of technology with Fjord Media.
"National's HD/SD adaptive cable equalisers and drivers enable our video routers to achieve lower power, industry-leading return loss and excellent signal integrity".
National's LMH0046, a SMPTE 292M/259M compliant reclocker, automatically detects and re-times the incoming data stream to suppress accumulated jitter.
Features include 0.6 unit interval minimum jitter tolerance, lock detect, manual rate select, LVPECL serial inputs and outputs, auto/manual bypass, and an output mute function for data and clock.
The 20-pin TSSOP package employs innovative exposed die attached pad (DAP) technology for an excellent electrical ground connection and added thermal protection.
Typical power consumption for the LMH0046 from a single 3.3V supply is 330mW, nearly half that of competitive solutions.
National's LMH0202 dual HD/SD cable driver accepts either two independent differential inputs or a single externally routed input.
It provides excellent output return loss, tight zero-crosspoint wander and low power consumption.
From a single 3.3V supply, the LMH0202 consumes 250mW of power in SD mode and 290mW in HD mode.
The LMH0202 is available in a space-saving 16-pin TSSOP package.
Packaged in a 16-pin SOIC, National's LMH0024 is the lowest power SMPTE compliant SD adaptive cable equaliser in the industry.
It supports SMPTE 259M/344M standards and consumes just 198mW typical power from a single 3.3V supply.
National's LMH0044 is a multirate SMPTE 292M/259M adaptive cable equaliser in a tiny 16-pin LLP package.
It receives and equalises cable lengths in excess of 140m of Belden 1694A cable at 1.5Gbit/s and greater than 350m at 270Mbit/s.
The LMH0044 consumes 208mW of typical power from a 3.3V supply.
Packaged in an 8-pin SOIC, National's LMH0002T is the first multirate cable driver offered in a -40 to +85C industrial temperature range.
The LMH0002T boasts industry-leading output return loss, low additive jitter of 18ps (SD) and 22ps (HD), and low power consumption of 125mW (SD) and 149mW (HD).
Packaged in a 64-pin TQFP, National's LMH0030 is the industry's lowest-jitter SMPTE-compliant HD/SD serialiser, with 85ps typical and 125ps maximum of output jitter.
The full-featured multirate serialiser offers a proprietary colour bar test pattern generator, ancillary data FIFO and low power consumption of 430mW typical at 3.3V.
The LMH0030 requires no external VCO.
It derives its reference frequency from the incoming data stream to reduce design complexity and lower bill of materials.
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