深圳市中立信电子科技有限公司

1 Features

1• User-Configurable Adaptive Cable Equalizer or

Cable Driver With Integrated Reclocker

• Supports ST-2082-1 (12G), ST-2081-1 (6G),

ST-424 (3G), ST-292 (HD), and ST-259 (SD)

• Compatible With DVB-ASI and AES10 (MADI)

• Integrated Reclocker Locks to SMPTE Rates of

11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps,

or Divide-by-1.001 Sub-Rates and 270 Mbps

• On-Chip 75-Ω Termination and Return Loss

Compensation Network

• EQ (Equalizer) Mode:

2 Applications

• SMPTE Compatible Serial Digital Interface

• UHDTV/4K/8K/HDTV/SDTV Video

• IP Media Gateway

• Digital Video Processing and Editing

3 Description

The LMH1297 is a 12G UHD-SDI 75-Ω bidirectional

I/O with integrated reclocker. This device can be

configured either in input mode as an adaptive cable

equalizer or in output mode as a dual cable driver,

allowing system designers the flexibility to use a

single BNC either as an input or output port,

simplifying UHD video hardware designs. The

integrated reclocker locks to all supported SMPTE

data rates up to 11.88 Gbps in both modes. The

bidirectional I/O has an on-chip 75-Ω termination and

return loss compensation network that meets the

stringent SMPTE return loss requirements.

An additional 75-Ω driver output allows the LMH1297

to support a variety of system functions. In EQ

(Equalizer) Mode, this second 75-Ω driver can be

used as a loop-through output. In Cable Driver (CD)

Mode, this 75-Ω driver can be used as a second fanout

cable driver. The host-side 100-Ω driver can also

be used as a loop-back output in CD Mode for

monitoring purposes.