IC ADAPT CBL EQUALIZER 16-LLP

LMH0384SQE/NOPB

Manufacturer Part NumberLMH0384SQE/NOPB
DescriptionIC ADAPT CBL EQUALIZER 16-LLP
ManufacturerNational Semiconductor
LMH0384SQE/NOPB datasheet
 


Specifications of LMH0384SQE/NOPB

ApplicationsDigital InterfaceInterfaceSPI
Voltage - Supply3.135 V ~ 3.465 VPackage / Case16-LLP
Mounting TypeSurface MountLeaded Process CompatibleYes
Rohs CompliantYesInput Voltage3.3 V
Supply Voltage (max)3.45 VSupply Voltage (min)3.15 V
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Mounting StyleSMD/SMTPeak Reflow Compatible (260 C)Yes
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther namesLMH0384SQETR
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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.
Typical Application (Pin Mode)
© 2009 National Semiconductor Corporation
LMH0384
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
300830
July 15, 2009
30083001
www.national.com

LMH0384SQE/NOPB Summary of contents

  • Page 1

    ... The device is available in a 16-pin LLP package. Typical Application (Pin Mode) © 2009 National Semiconductor Corporation LMH0384 Features ■ SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M compliant ■ ...

  • Page 2

    Absolute Maximum Ratings Supply Voltage Input Voltage (all inputs) Storage Temperature Range Junction Temperature Package Thermal Resistance  θ 16-pin LLP JA  θ 16-pin LLP JC ESD Rating (HBM) ESD Rating (MM) ESD Rating (CDM) DC Electrical Characteristics Over Supply Voltage ...

  • Page 3

    AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol Parameter BR Minimum Input Data Rate MIN BR Maximum Input Data Rate MAX Jitter for Various Cable Lengths t ,t Output Rise Time, Fall ...

  • Page 4

    Note 6: The differential output voltage and offset voltage are adjustable via the SPI. Note 7: The equalizer automatically shifts equalization stages at cable lengths less than 140m (Belden 1694A) to reduce power consumption. This power savings is also achieved ...

  • Page 5

    Connection Diagrams Pin Mode (non-SPI) / SPI_EN = GND / LMH0344 Compatible The exposed die attach pad is a negative electrical terminal for this device. It should be connected to the negative power supply voltage. Pin Descriptions – Pin Mode ...

  • Page 6

    Pin Name I/O, Type 7 BYPASS I, LVCMOS 8 MUTE I, Analog REF LVCMOS EE 10 SDO O, LVDS 11 SDO O, LVDS 12 AUTO SLEEP I, LVCMOS 13 V Power CC 14 MUTE I, LVCMOS 15 ...

  • Page 7

    Block Diagram (Pin Mode) Device Operation BLOCK DESCRIPTION The Equalizer Filter block is a multi-stage adaptive filter. If Bypass is high, the equalizer filter is disabled. The DC Restoration / Level Control block receives the dif- ferential signals from the ...

  • Page 8

    The device will wake up automatically once an input signal is detected, and the delay between signal detection and full functionality of the equalizer is negligible (about 1 µs). ...

  • Page 9

    SPI Register Access Setting SPI_EN high enables the optional SPI register access mode. In SPI mode, the LMH0384 provides register access to all of its features along with a cable length indicator, pro- grammable output common mode voltage and swing, ...

  • Page 10

    FIGURE 7. Extended 3G Reach Mode State Machine Example EXPLANATION OF EXTENDED 3G REACH MODE STATE MACHINE (Figure 7) When the LMH0384 is powered on, it will be in normal mode. If there is no input signal (register 00h, bit ...

  • Page 11

    Application Information APPLICATION CIRCUIT (SPI MODE) Figure 8 shows the application circuit for the LMH0384 in SPI mode. REPLACING THE LMH0344 In pin mode, the LMH0384 is a drop-in replacement for the LMH0344SQ SDI cable equalizer. When replacing an LMH0344 ...

  • Page 12

    BNC and the equalizer to ensure that the charac- teristic impedance of this trace is 75Ω. Please consider the following PCB recommendations: • Use surface mount components, and use the smallest components available. In addition, use the smallest ...

  • Page 13

    SPI Registers Address R/W Name Bits Field 00h R/W General Control 4:3 2 1:0 01h R/W Output Driver 7:5 4:2 1:0 TABLE 1. SPI Registers Default Description Carrier Detect 0: No carrier detected. 1: Carrier detected. Mute ...

  • Page 14

    Address R/W Name Bits Field 02h R/W Launch Amplitude 6:3 2:0 03h R CLI 7:3 2:0 04h R Device ID 7:0 www.national.com Default Description 7 Coarse Control 0 Coarse launch amplitude optimization. 0: Normal optimization with no external attenuation (800 ...

  • Page 15

    Physical Dimensions inches (millimeters) unless otherwise noted 16-Pin LLP Order Number LMH0384SQ NS Package Number SQB16A 15 www.national.com ...

  • Page 16

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