LMH0394SQE/NOPB National Semiconductor, LMH0394SQE/NOPB Datasheet

IC EQUALIZER CABLE 16-LLP

LMH0394SQE/NOPB

Manufacturer Part Number
LMH0394SQE/NOPB
Description
IC EQUALIZER CABLE 16-LLP
Manufacturer
National Semiconductor
Datasheet

Specifications of LMH0394SQE/NOPB

Applications
Amplifier
Interface
SPI Serial
Voltage - Supply
2.5V
Package / Case
16-WQFN Exposed Pad
Mounting Type
Surface Mount
Ic Interface Type
Serial, SPI
Supply Voltage Range
2.5V
Power Dissipation Pd
115mW
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
LLP
No. Of Pins
16
Rohs Compliant
Yes
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Operating Temperature (max)
85C
Package Type
LLP EP
Rad Hardened
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LMH0394SQE/NOPBTR
© 2011 National Semiconductor Corporation
3G HD/SD SDI Low Power Extended Reach Adaptive Cable
Equalizer
General Description
The LMH0394 3 Gbps HD/SD SDI Low Power Extended
Reach 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
SMPTE 424M, SMPTE 292M, SMPTE 344M, SMPTE 259M,
and DVB-ASI standards.
The LMH0394 provides extended cable reach with ultra low
power consumption. The equalizer includes active sensing
circuitry that ensures robust performance and enhanced im-
munity to variations in the input signal launch amplitude. The
output driver offers programmable de-emphasis for up to 40”
of FR4 trace losses. The LMH0394 includes power manage-
ment to further reduce power consumption when no input
signal is present.
The LMH0394 supports two modes of operation. In pin mode,
the LMH0394 operates with control pins to set its operating
state, and is footprint compatible with the LMH0384,
LMH0344, and legacy SDI equalizers. In SPI mode, an op-
tional SPI serial interface can be used to access and configure
multiple LMH0394 devices in a daisy-chain configuration.
This allows programming the output common mode voltage
and swing, output de-emphasis level, input launch amplitude,
and power management settings, as well as access to a cable
length indicator and all pin mode features.
Typical Application (Pin Mode)
301015
LMH0394
Features
Applications
SMPTE 424M, SMPTE 292M, SMPTE 344M, SMPTE
259M, and DVB-ASI compliant
Equalizes up to 200 meters of Belden 1694A at 2.97 Gbps,
up to 220 meters of Belden 1694A at 1.485 Gbps, or up to
400 meters of Belden 1694A at 270 Mbps
Ultra low power consumption: 115 mW (normal operation)
Power save mode with auto sleep control (17 mW typical
power consumption in power save mode)
Output de-emphasis to compensate for FR4 board trace
losses
Digital and analog programmable MUTE
control
Optional SPI register access
Wide range of data rates: 125 Mbps to 2.97 Gbps
Internally terminated 100Ω LVDS outputs with
programmable output common mode voltage and swing
Programmable launch amplitude optimization
Cable length indicator
Single 2.5V supply operation
16-pin LLP package
Industrial temperature range: −40°C to +85°C
Footprint compatible with the LMH0384 and also the
LMH0344, LMH0044, and LMH0074 in pin mode.
SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
259M serial digital interfaces
Broadcast Video routers, switchers, and distribution
amplifiers
REF
30101501
April 25, 2011
www.national.com
threshold

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LMH0394SQE/NOPB Summary of contents

Page 1

... Typical Application (Pin Mode) © 2011 National Semiconductor Corporation LMH0394 Features ■ SMPTE 424M, SMPTE 292M, SMPTE 344M, SMPTE 259M, and DVB-ASI compliant ■ ...

Page 2

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. Ordering Information Part Number LMH0394SQ ...

Page 3

Pin Descriptions – Pin Mode (non-SPI) / SPI_EN = GND / LMH0344 Compatible Pin Name I/O, Type 1 V Ground EE 2 SDI I, SDI 3 SDI I, SDI 4 SPI_EN I, LVCMOS 5 AEC+ I/O, Analog 6 AEC- I/O, ...

Page 4

Pin Descriptions – SPI Mode / SPI_EN = V Pin Name I/O, Type 1 V Ground EE 2 SDI I, SDI 3 SDI I, SDI 4 SPI_EN I, LVCMOS 5 AEC+ I/O, Analog 6 AEC- I/O, Analog ...

Page 5

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 6

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

Page 7

Note 3: Typical values are stated for V = +2.5V and T CC Note 4: Specification is guaranteed by characterization. Note 5: The LMH0394 can be optimized for different launch amplitudes via the SPI. Note 6: The differential output voltage ...

Page 8

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 9

CARRIER DETECT (CD) AND MUTE Carrier detect CD indicates if a valid signal is present at the LMH0394 input. This signal is logical OR operation of the in- ternal energy detector and MUTE setting (if used). The REF internal energy ...

Page 10

SPI Register Access Setting SPI_EN high enables the optional SPI register access mode. In SPI mode, the LMH0394 provides register access to all of its features along with a cable length indicator, pro- grammable output de-emphasis, programmable output com- mon ...

Page 11

LMH0394's MOSI input. Once again, the prior SPI com- mand, address, and data are shifted out on the MISO output, but this data now includes the requested read data. The read data is available on the MISO output ...

Page 12

SPI Daisy-Chain Read Figure 9 shows the SPI daisy-chain read for a daisy-chain of N devices. The SPI daisy-chain read is 32xN bits long, con- sisting of 16xN bits for the read transaction followed by 16xN bits for the dummy ...

Page 13

In the second transaction, three dummy reads (each consist- ing of 16 “1”s) are shifted in, and the read data from Device 2 (with value 0x88) appears on MISO in the 25th through 32nd clock cycles. SPI Daisy-Chain Length Detection ...

Page 14

Application Information APPLICATION CIRCUIT (SPI MODE) Figure 13 shows the application circuit for the LMH0394 in SPI mode. (Note: The application circuit shows an external INTERFACING TO 3.3V SPI The LMH0394 may be controlled via optional SPI register ac- cess. ...

Page 15

PCB LAYOUT RECOMMENDATIONS For information on layout and soldering of the LLP package, pease refer to the following application note: AN-1187, “Leadless Leadframe Package (LLP).” The SMPTE 424M, 292M, and 259M standards have strin- gent requirements for the input return ...

Page 16

SPI Registers Address R/W Name Bits Field 00h R/W General Control 4:3 Sleep Mode 01h R/W Output Driver 7:6 Output Swing 5:4 Offset Voltage 3 2:1 De-Emphasis 0 02h R/W Launch 7 Amplitude Control ...

Page 17

Address R/W Name Bits Field 03h R/W MUTE 7:6 Reserved REF 5 4:0 Digital MUTE 04h R Device ID 7:6 Reserved 5 3:0 Die Revision 05h R Rate Indicator 7:6 Reserved 5 4:0 Reserved 06h R Cable Length ...

Page 18

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 16-Pin LLP Order Number LMH0394SQ NS Package Number SQB16A 18 ...

Page 19

Notes 19 www.national.com ...

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... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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