(LMH0xxx) DVB-ASI SDI Serializer and Driver - National Semiconductor
Description
LMH0340, LMH0040, LMH0070, LMH0050 3G, HD, SD, DVB-ASI SDI Serializer and Driver with LVDS Interface
ADVANCE INFORMATION
April 2007
LMH0340, LMH0040, LMH0070, LMH0050 3G, HD, SD, DVB-ASI SDI Serializer and Driver with LVDS Interface
General Description
The LMH0040 family of products provide a very simple 5:1 serializer and transmitter function, intended to be paired with an FPGA host which will format the data appropriately such that the output of the LMH0040 will be compliant with the output requirements of DVB-ASI, SMPTE 259M, and SMPTE 292M.
The LMH0340 adds support for SMPTE 424M, the LMH0070 supports 270 Mbps operation only, and the LMH0050 requires an external cable driver.
Throughout this document, if not explicitly stated, when the LMH0040 is referred to this includes all members of the family.
The interface between the LMH0040 and the FPGA consists of a 5 bit wide LVDS bus, an LVDS clock and an SMBus interface.
The product is packaged in a physically small 48 pin LLP package.
Key Specifications
■ Output compliant with SMPTE 424M, SMPTE 292M,
SMPTE 259M-C and DVB-ASI
■ Typical power dissipation: 420 mW ■ Typical output jitter <53 ps (HD, 3G)
Features
■ ■ ■ ■ ■
LVDS Interface No external VCO or clock required Integrated Variable output Cable Driver 3.
3V SMBus configuration interface 48pin LLP package
Applications
■ SDI interfaces for:
— — — — Video Cameras DVRs Video Switchers Video Editing Systems
Block Diagram
30017001
© 2007 National Semiconductor Corporation
300170
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LMH0040
TABLE 1.
Feature Table Device LMH0340 LMH0040 LMH0070 LMH0050 X SMPTE 424M Support X SMPTE 292M Support X X SMPTE 259M Support X X X X DVB-ASI Support SMPTE Compliant cable driver X X X X X X X
Device Operation
The LMH0040 serializer is used in digital video signal origination equipment.
It is intended to be operated in conjunction with an FPGA host which preprocesses data for it, and then provides this data over the five bit wide datapath.
Provided the ho...
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