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LMH1297RTVR Datasheet(PDF) 1 Page - Texas Instruments

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Part # LMH1297RTVR
Description  12G UHD-SDI Bidirectional I/O With Integrated Reclocker
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LMH1297RTVR Datasheet(HTML) 1 Page - Texas Instruments

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Cable
EQ
PCB
EQ
M
U
X
100-Ÿ
Driver
SDI_IO±
OUT0±
IN0±
SDI_OUT±
CDR
Power
Management
Serial
Interface
LDO
Control
TX_RX
Cable
Driver
Copyright © 2016, Texas Instruments Incorporated
Control Logic
Cable
Driver
M
U
X
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
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Community
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
LMH1297
SNLS572 – MARCH 2017
LMH1297 12G UHD-SDI Bidirectional I/O With Integrated Reclocker
1
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:
Adaptive Cable Equalizer With Integrated
Reclocker
100-Ω Output Driver With De-Emphasis
Reclocked 75-Ω Loop-Through Output
EQ Mode Cable Reach
(Belden 1694A, SDI_OUT Disabled):
75 m at 11.88 Gbps
120 m at 5.94 Gbps
200 m at 2.97 Gbps
300 m at 1.485 Gbps
600 m at 270 Mbps
Cable Driver (CD) Mode:
Dual Differential Output Cable Drivers With
Integrated Reclocker
Adaptive PCB Input Equalizer
Reclocked 100-Ω Loopback Output
Automatic Pre-Emphasis and Slew Rate Control
on 75-Ω Outputs
Polarity Inversion on 75-
Ω and 100-Ω Outputs
Automatic Power Save in Absence of Input Signal
Power Dissipation: 25 mW (Typical)
Power-Down Control Through ENABLE Pin
Single 2.5-V Supply
EQ Mode Power Dissipation: 275 mW
(Typical)
CD Mode Power Dissipation: 315 mW
(Typical)
Programmable Through Pins, SPI, or SMBus
Interface
–40°C to +85°C Operating Temperature Range
5-mm × 5-mm, 32-pin QFN Package
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 CD (Cable Driver)
Mode, this 75-
Ω driver can be used as a second fan-
out cable driver. The host-side 100-
Ω driver can also
be used as a loop-back output in CD Mode for
monitoring purposes.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMH1297
QFN (32)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Block Diagram


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