LMH0384 Datasheet, PDF (1/16 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer

LMH0384
July 15, 2009
3 Gbps HD/SD SDI Extended Reach and Configurable
Adaptive Cable Equalizer
General Description
The LMH0384 3 Gbps HD/SD SDI Extended Reach and Con-
figurable Adaptive Cable Equalizer is designed to equalize
data transmitted over cable (or any media with similar disper-
sive loss characteristics). The equalizer operates over a wide
range of data rates from 125 Mbps to 2.97 Gbps and supports
SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
259M standards.
The LMH0384 includes active sensing features and design
enhancements including longer cable equalization, lower out-
put 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 fea-
tures along with a cable length indicator, programmable out-
put common mode voltage and swing, and launch amplitude
optimization.
The device is available in a 16-pin LLP package.
Features
■ ^{SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE}
259M compliant
■ ^{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 100Ω 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 3.3V supply operation}
■ ^{16-pin LLP package}
■ ^{Industrial temperature range: −40°C to +85°C}
■ ^{Footprint compatible with the LMH0344, LMH0044, and}
LMH0074 in pin mode.
Applications
■ ^{SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE}
259M serial digital interfaces
■ ^{Serial digital data equalization and reception}
■ ^{Data recovery equalization}
Typical Application (Pin Mode)
© 2009 National Semiconductor Corporation 300830
30083001
www.national.com