LMH0397 Datasheet, PDF (1/12 Pages) Texas Instruments – 3G-SDI Bidirectional I/O With Integrated Reclocker

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LMH0397
SNLS577 – APRIL 2017
LMH0397 3G-SDI Bidirectional I/O With Integrated Reclocker
1 Features
•1 User-Configurable Adaptive Cable Equalizer or
Cable Driver With Integrated Reclocker
• Supports ST-424 (3G), ST-292 (HD), and ST-259
(SD)
• Compatible With DVB-ASI and AES10 (MADI)
• Integrated Reclocker Locks to SMPTE Rates of
2.97 Gbps, 1.485 Gbps, or Divide-by-1.001
Subrates 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):
– 200 m at 2.97 Gbps
– 300 m at 1.485 Gbps
– 600 m at 270 Mbps
• CD (Cable Driver) 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: 275 mW (Typical)
– CD Mode: 315 mW (Typical)
• Programmable Through Pins, SPI, or SMBus
Interface
• –40°C to +85°C Operating Temperature Range
• 5-mm × 5-mm, 32-Pin WQFN Package
• Pin Compatible with the LMH1297 for Easy
Upgrade to 12G-SDI
2 Applications
• SMPTE-Compatible Serial Digital Interface (SDI)
• Broadcast Video Routers, Switchers, Distribution
Amplifiers, and Monitors
• IP Media Gateway
• Digital Video Processing and Editing
3 Description
The LMH0397 is a 3G-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 to simplify HD-SDI
video hardware designs. The integrated reclocker
locks to all supported SMPTE data rates up to 2.97
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 LMH0397
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 loopback output in CD Mode for
monitoring purposes.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMH0397
WQFN (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
SDI_IO±
Cable
EQ
TX_RX
M
U
X
CDR
M
U
X
Cable
Driver
SDI_OUT±
Cable
Driver
LDO
Power
Management
Control
Control Logic
100-Ÿ
Driver
OUT0±
PCB
EQ
IN0±
Serial
Interface
Copyright © 2016, Texas Instruments Incorporated
1
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.