LMH0395SQ/NOPB National Semiconductor, LMH0395SQ/NOPB Datasheet

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LMH0395SQ/NOPB

Manufacturer Part Number
LMH0395SQ/NOPB
Description
IC EQUALIZER DUAL CABLE 24-LLP
Manufacturer
National Semiconductor
Datasheet

Specifications of LMH0395SQ/NOPB

Applications
Amplifier
Interface
SPI Serial
Voltage - Supply
2.5V
Package / Case
*
Mounting Type
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LMH0395SQ/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
© 2011 National Semiconductor Corporation
3G HD/SD SDI Dual Output Low Power Extended Reach
Adaptive Cable Equalizer
General Description
The LMH0395 3 Gbps HD/SD SDI Dual Output Low Power
Extended Reach Adaptive Cable Equalizer is designed to
equalize data transmitted over cable (or any media with sim-
ilar 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 LMH0395 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
LMH0395 offers power management to further reduce power
consumption when no input signal is present.
The LMH0395 has two differential serial data outputs, in-
creasing flexibility and eliminating the need for a fanout buffer
on the output in many applications. The outputs may be in-
dependently enabled and controlled. The output drivers offer
programmable de-emphasis for up to 40” of FR4 trace losses.
The LMH0395 supports two modes of operation. In pin mode,
the LMH0395 operates with control pins to set its operating
state. In SPI mode, an optional SPI serial interface can be
used to access and configure multiple LMH0395 devices in a
daisy-chain configuration. This allows programming the out-
put common mode voltage and swing, output de-emphasis
level, input launch amplitude, and power management set-
tings, as well as access to a cable length indicator and all pin
mode features.
Typical Application (Pin Mode)
301157
LMH0395
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: 140 mW (dual outputs),
115 mW (single output)
Dual differential outputs; second output can be
independently powered down
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
24-pin LLP package
Industrial temperature range: −40°C to +85°C
SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
259M serial digital interfaces
Broadcast Video routers, switchers, and distribution
amplifiers
30115701
REF
April 25, 2011
www.national.com
threshold

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LMH0395SQ/NOPB Summary of contents

Page 1

... Typical Application (Pin Mode) © 2011 National Semiconductor Corporation LMH0395 Features ■ SMPTE 424M, SMPTE 292M, SMPTE 344M, SMPTE 259M, and DVB-ASI compliant ■ ...

Page 2

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

Page 3

Ordering Information Part Number LMH0395SQ LMH0395SQE LMH0395QX Pin Descriptions – Pin Mode (non-SPI) / SPI_EN = GND Pin Name I/O, Type 1 V Ground Ground EE 3 SDI I, SDI 4 SDI I, SDI 5 V Ground ...

Page 4

Pin Descriptions – SPI Mode / SPI_EN = V Pin Name I/O, Type 1 V Ground Ground EE 3 SDI I, SDI 4 SDI I, SDI 5 V Ground EE 6 SPI_EN I, LVCMOS 7 SDO1_DISABLE I, ...

Page 5

Absolute Maximum Ratings Supply Voltage Input Voltage (all inputs) Storage Temperature Range Junction Temperature Package Thermal Resistance  θ 24-pin LLP JA  θ 24-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 LMH0395 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 LMH0395 input. This signal is logical OR operation of internal energy detector and MUTE setting (if used). Internal en- REF ergy detector detects ...

Page 10

SPI Register Access Setting SPI_EN high enables the optional SPI register access mode. In SPI mode, the LMH0395 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

MISO output during the first 16-bit transac- tion, and are typically ignored (this is shown as “Don't Care” on the MISO output in Figure 3. SS must return high and then is driven low again before ...

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 LMH0395 in SPI mode. (Note: The application circuit shows an external INTERFACING TO 3.3V SPI The LMH0395 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 REF 6 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 24-Pin LLP Order Number LMH0395SQ NS Package Number SQA24A 18 ...

Page 19

Notes 19 www.national.com ...

Page 20

... 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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