LMH0384 Datasheet, PDF (1/29 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer

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LMH0384
SNLS308G – APRIL 2009 – REVISED JUNE 2015
LMH0384 3-Gbps HD - SD SDI Extended Reach and Configurable Adaptive Cable
Equalizer
1 Features
•1 Compliant With ST 424, ST 292, ST 344, and ST
259
• Supports DVB-ASI at 270 Mbps
• Wide Range of Data Rates: 125 Mbps to 2.97
Gbps
• Equalizes up to 140 Meters of Belden 1694A at
2.97 Gbps, up to 200 Meters of Belden 1694A at
1.485 Gbps, or Up to 400 Meters of Belden 1694A
at 270 Mbps
• Power Save Mode With Auto Sleep Control (35
mW Typical Power Consumption in Power Save
Mode)
• Optional SPI Register Access
• Manual Bypass and Output Mute With a
Programmable Threshold
• Internally Terminated 100-Ω LVDS Outputs With
SPI Programmable Output Common-Mode
Voltage and Swing
• Programmable Launch Amplitude Optimization in
SPI Mode
• Cable Length Indicator in SPI Mode
• Single 3.3-V Supply Operation
• 16-Pin WQFN Package
• Industrial Temperature Range: −40°C to +85°C
• Footprint Compatible With the LMH0344,
LMH0044, and LMH0074 in Pin Mode
2 Applications
• ST 424, ST 292, ST 344, and ST 259 Serial
Digital Interfaces
• Serial Digital Data Equalization and Reception
• Data Recovery Equalization ⁽¹⁾
3 Description
The LMH0384 3-Gbps HD - SD SDI Extended Reach
and Configurable Adaptive Cable Equalizer is
designed to equalize data transmitted over cable (or
any media with similar dispersive loss
characteristics). The equalizer operates over a wide
range of data rates from 125 Mbps to 2.97 Gbps and
supports ST 424, ST 292, ST 344, and ST 259
standards.
The LMH0384 device includes active sensing
features and design enhancements including longer
cable equalization, lower output jitter, configurable pin
mode and SPI modes, a power-saving sleep mode,
and programmable output common-mode voltage and
swing. The LMH0384 implements DC restoration to
correctly handle pathological data conditions.
The LMH0384 includes an auto sleep mode to power
down the device when no input signal is detected.
Other features include separate carrier detect and
output mute pins which may be tied together to mute
the output when no input signal is present, and a
programmable mute reference which may be used to
mute the output at a selectable level of signal
degradation.
The LMH0384 supports two modes of operation. In
pin mode (non-SPI mode) the LMH0384 is footprint
compatible with the LMH0344 and legacy SDI
equalizers. In the optional SPI mode, the LMH0384
provides register access to all of its features along
with a cable length indicator, programmable output
common-mode voltage and swing, and launch
amplitude optimization.
PART NUMBER
LMH0384
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
WQFN (16)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Functional Block Diagram
SDI
SDI
Equalizer
Filter
DC
Restoration/
Level Control
Output
Driver
BYPASS
SDO
SDO
(1) Due to SMPTE naming convention, all SMPTE Engineering
Documents will be numbered as a 2-letter prefix and a
number. Documents and references with the same root
number and year are functionally identical; for example ST
424-2006 and SMPTE 424M-2006 refer to the same
document.
1
SPI_EN
SPI Control
Energy
Detect
Energy
Detect
$
Automatic
Equalization
Control
AEC+ AEC-
AUTO SLEEP
Carrier
Detect
MUTEREF
MUTE
CD
MUTEREF
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.