CLC001_14 [TI]
Serial Digital Cable Driver with Adjustable Outputs;
| 型号： | CLC001_14 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Serial Digital Cable Driver with Adjustable Outputs |
| 文件： | 总13页 (文件大小：569K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CLC001
CLC001 Serial Digital Cable Driver with Adjustable Outputs
Literature Number: SNLS066B
February 2006
CLC001
Serial Digital Cable Driver with Adjustable Outputs
General Description
Applications
n Digital routers and distribution amplifiers
The CLC001 is a monolithic, high-speed cable driver de-
signed for use in SMPTE 259M serial digital video and ITU-T
G.703 serial digital data transmission applications. The
CLC001 drives 75Ω transmission lines (Belden 8281 or
equivalent) at data rates up to 622 Mbps. Controlled output
rise and fall times (400 ps typical) minimize transition-
induced jitter. The output voltage swing is adjustable from
800 mVp-p to 1.0 Vp-p using an external resistor.
n Coaxial cable driver for digital transmission lines
n Twisted pair driver
n Serial digital video interfaces for the commercial and
broadcast industry
n SMPTE, Sonet/SDH, and ATM compatible driver
n Buffer applications
The CLC001’s output stage consumes less power than other
designs. The differential inputs accept LVDS signal levels,
LVPECL levels directly or PECL with attenuation networks.
All these make the CLC001 an excellent general purpose
high speed driver for high-speed, long distance data trans-
mission applications.
The CLC001 is powered from a single +3.3V supply and
comes in a small 8-pin SOIC package.
Key Specifications
n 400 ps rise and fall times
n Data rates to 622 Mbps
n 100 mV differential input threshold
n Low residual jitter
10132910
622 Mbps Eye Pattern with STM-4 Signal Mask
Features
Connection Diagram (8-Pin SOIC)
n Adjustable output amplitude
n Differential input and output
n Accepts LVPECL or LVDS input swings
n Low power dissipation
n Single +3.3V supply
10132902
Order Number CLC001AJE
See NS Package Number M08A
© 2006 National Semiconductor Corporation
DS101329
www.national.com
Typical Application
10132901
www.national.com
2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
θJC Surface Mount AJE
Reliability Information
Transistor count
105˚C/W
291
Supply Voltage
4V
27 mA
Recommended Operating
Conditions
Output Current
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature
+125˚C
Supply Voltage Range (VDD - VSS
)
+3.0V to +3.6V
-40˚C to +85˚C
1.3kΩ to
−65˚C to +150˚C
Operating Free Air Temperature (TA)
RBB Range (applied to VBB input)
(Note 6)
(Soldering 10 seconds)
ESD Rating (HBM)
+300˚C
≥ 7 kV
≥ 500V
11.5kΩ
ESD Rating (MM)
Package Thermal Resistance
θJA Surface Mount AJE
125˚C/W
Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified (Notes 2 and 3)
Symbol
Parameter
Conditions
Min
720
900
Typ
Max
880
Units
OUTPUT DC SPECIFICATIONS
VSDO
Serial Driver Output Voltage
RL = 75Ω 1%,RREF = 1.91 kΩ 1% (for
800 mVp-p),Figure 1
800
mV
mV
RL = 75Ω 1%,RREF = 1.5 kΩ 1% (for
1.0 Vp-p),Figure 1
1000
1100
INPUT DC SPECIFICATIONS
VTH
VTL
VCMR
IIN
Differential Input High Threshold
VCM = +0.05V or +1.2V or +3.25V,
VDD = 3.3V
0
0
+100
mV
mV
V
Differential Input Low Threshold
Common Mode Voltage Range
Input Current
−100
0.05
VID = 100mV, VDD = 3.3V
VIN = 0V or +3.0V, VDD = 3.6V or 0V
VIN = 0V or +3.0V, VDD = 3.6V or 0V,
(Note 8)
3.25
10
1
µA
µA
IINB
Input Current Balance
0.23
SUPPLY CURRENT
IDD Total Dynamic Power Supply Current
(includes load current)
RL = 75Ω,RREF = 1.91 kΩ 1%(VSDO
=
70
85
115
130
mA
mA
@
800 mVp-p 270 Mbps)
RL = 75Ω,RREF = 1.5 kΩ 1%(VSDO
=
@
1.0 Vp-p 622 Mbps)
MISCELLANEOUS PARAMETERS
LGEN
RGEN
IBB
Output Inductance
Output Resistance
VBB Current
6
nH
kΩ
µA
µA
25
RREF = 1.91 kΩ 1%, (Note 6)
RREF = 1.5 kΩ 1%, (Note 6)
250
315
3
www.national.com
AC Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified (Note 3)
Symbol
tr, tf
Parameter
Rise time, Fall time
Conditions
Min
Typ
400
5
Max
Units
ps
20%–80%, (Notes 4, 5)
800
tos
tjit
Output overshoot
Output jitter
%
(Note 7)
(Note 5)
25
ps
tpd
Propagation delay
1.9
ns
Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
Note 2: Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are stated referenced to V = 0V.
SS
Note 3: Typical values are at 25˚C and 3.3V.
Note 4: This parameter is Guaranteed by Design.
Note 5: R = 75Ω, AC-coupled at 270 Mbps, R
= 1.91 kΩ 1% (for V
= 800 mV
10%), C not greater than 5pF (See Figure 1)
L
L
REF
SDO
p-p
Note 6: The V output is intended as a bias supply pin for the inputs of this device only. It is not designed as a power supply output and should not be used to
BB
power other devices.
Note 7: R = 75Ω, AC-coupled at 622 Mbps, R
= 1.5 kΩ 1% (for V
= 1.0 V
10%), clock pattern input.
L
REF
SDO
p-p
Note 8: Input Current Balance (I ) is the difference between the Input Current (I ) on V and V for the same bias condition.
INB
IN
IN+
IN−
Test Loads
10132904
FIGURE 1. Test Loads
www.national.com
4
Test Loads (Continued)
10132903
FIGURE 2. Test Circuit
Description
Pin Descriptions
Pin #
Name
1
VBB
Optional, bias voltage (may be used to bias inputs) - see device operation
section for details. If unused leave as no connect (NC).
2
3
4
VIN+
VIN-
Positive input pin
Negative input pin
RREF
Output driver level control. Connect a resistor to ground to set output voltage
swing.
5
6
7
8
VSS
Negative power supply
Serial data true output
Serial data complement output
Positive power supply
SDO
SDO
VDD
5
www.national.com
Device Operation
INPUT INTERFACING
Numerous input configurations exist for applying PECL,
LVPECL, and LVDS signals to the input of the CLC001.
Inputs may be single-ended or differential, AC or DC
coupled.
The VBB pin may be used to provide a DC bias voltage to the
inputs. Leave this pin as a no connect when no bias is
needed. Note that DC-coupled inputs such as direct LVDS
and LVPECL connections are self-biasing and do not require
use of the VBB pin. IBB, the current produced by the VBB pin,
depends on RREF. For a given RREF, the IBB current will
remain constant, and the bias voltage is determined by the
value of resistance, RBB, between the VBB pin and ground.
Figure 3 and Figure 4 show how RBB corresponds to some
common VBB values with RREF held at 1.91 kΩ and 1.5 kΩ,
respectively. Some common input configurations are shown
in Figure 5 through Figure 9.
10132912
FIGURE 4. RBB vs. VBB for RREF = 1.5 kΩ
10132911
FIGURE 3. RBB vs. VBB for RREF = 1.91 kΩ
www.national.com
6
825Ω gives the equivalent termination resistance of 75Ω.
RBB set at 5kΩ provides 1.25V of DC bias to the input.
Device Operation (Continued)
Figure 5 shows the CLC001 with an AC-coupled, single
ended input connection. The 82.5Ω resister in parallel with
10132905
FIGURE 5. Single Ended 75Ω Coaxial Cable, AC-coupled
A typical DC-coupled, twisted pair cable connection is shown
in Figure 6. The CLC001 is driven differentially. The line is
terminated with a termination resistor equal to the imped-
ance of the line being driven. The actual resistor value is
media specific, but typically is between 100 and 120Ω de-
pending upon the cable. This resistor should be located
close to the CLC001 inputs pins to minimize the resulting
stub length between the resistor and device pads.
10132906
FIGURE 6. Twisted Pair Cable, DC-coupled
7
www.national.com
used in conjunction with two 50Ω resistors to filter common
mode noise. RBB set at 5kΩ provides 1.25V of DC bias to
each input.
Device Operation (Continued)
Figure 7 shows an AC-coupled, twisted pair cable applica-
tion. It implements a center tap capacitance termination
10132907
FIGURE 7. Twisted Pair Cable, AC-coupled
PECL or LVPECL drivers may be interfaced to the CLC001
as shown in Figure 8. The voltage divider network will reduce
the PECL output to the proper levels. For LVPECL, the 100Ω
series resistors should be removed, since the common
mode range inputs of the CLC001 are wide enough to accept
LVPECL levels directly. No external DC biasing is required
for PECL/LVPECL connections.
10132908
FIGURE 8. PECL, DC-coupled
www.national.com
8
media specific, but typically is between 100 and 120Ω. This
resistor should be located close to the CLC001 inputs pins to
minimize the resulting stub length between the resistor and
device pads. The CLC001 supports 100mV thresholds
across the entire LVDS common mode range of 0.1V to 2.3V
for a 200mV differential signal.
Device Operation (Continued)
A typical LVDS input connection is shown in Figure 9. The
media is driven differentially by an LVDS driver. The line is
terminated with a termination resistor equal to the imped-
ance of the line being driven. The actual resistor value is
10132909
FIGURE 9. LVDS, DC-coupled
9
www.national.com
vices. The evaluation boards can be ordered through Nation-
al’s Distributors. Supplies are limited, please check for cur-
rent availability.
Device Operation (Continued)
OUTPUT INTERFACING
The CLC001 has two complementary, ground referenced
outputs designed to drive AC-coupled and terminated 75Ω
coaxial cables. The outputs are single ended; however, they
could be treated as a single differential output as long as
current paths from each output go to ground.
The SD001EVK evaluation kit for the CLC001, Serial Digital
Cable Driver with Adjustable Outputs, provides an operating
environment in which the cable driver can be evaluated by
system / hardware designers. The evaluation board has all
the needed circuitry and connectors for easy connection and
checkout of the device circuit options as discussed in the
CLC001 datasheet. A schematic, parts list and pictorial
drawing are provided with the board.
The output of the CLC001 is a high impedance current
source. It expects to see a 75Ω shunt resistor before driving
cable to convert the current output to a voltage and provide
proper back-matching. No series back-matching resistors
should be used. Refer to Section Typical Application for an
illustration.
From the WWW, the following information may be viewed /
downloaded for most evaluation boards: www.national.com/
appinfo/interface
Output levels range from 800 mVp-p to 1.0 Vp-p 10% into
75Ω AC-coupled, back-matched loads. Output level is con-
trolled by the value of RREF connected to pin 4. RREF is 1.91
kΩ 1% for 800 mVp-p, and 1.5 kΩ 1% for 1.0 Vp-p. Refer
•
•
•
•
•
Device Datasheet and / or EVK User Manual
View a picture of the EVK
View the EVK Schematic
View the top assembly drawing and BOM
View the bottom assembly drawing and BOM
to Figure 10 for the output level’s sensitivity to RREF
.
PCB Layout Recommendations
Printed circuit board layout affects the performance of the
CLC001. The following guidelines will aid in achieving satis-
factory device performance.
•
Use a ground plane or power/ground plane sandwich
design for optimum performance.
•
Bypass device power with a 0.01 µF monolithic ceramic
capacitor in parallel with a 6.8 µF tantalum electrolytic
capacitor located no more than 0.1" (2.5 mm) from the
device power pins.
•
•
Provide short, symmetrical ground return paths for:
— inputs,
— supply bypass capacitors and
— the output load.
10132913
Provide short, grounded guard traces located
— under the centerline of the package,
— 0.1" (2.5 mm) from the package pins
FIGURE 10. Output level’s sensitivity to RREF
Evaluation Board
Evaluation boards are available for a nominal charge that
demonstrate the basic operation of the SDI/SDV/SDH de-
— on both top and bottom of the board with connecting
vias.
www.national.com
10
Physical Dimensions inches (millimeters) unless otherwise noted
Order Number CLC001AJE
NS Package Number M08A
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS
WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and whose failure to perform when
properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to result
in a significant injury to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or
system, or to affect its safety or effectiveness.
BANNED SUBSTANCE COMPLIANCE
National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products
Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain
no ‘‘Banned Substances’’ as defined in CSP-9-111S2.
Leadfree products are RoHS compliant.
National Semiconductor
Americas Customer
Support Center
National Semiconductor
Europe Customer Support Center
Fax: +49 (0) 180-530 85 86
National Semiconductor
Asia Pacific Customer
Support Center
National Semiconductor
Japan Customer Support Center
Fax: 81-3-5639-7507
Email: new.feedback@nsc.com
Tel: 1-800-272-9959
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
Email: ap.support@nsc.com
Email: jpn.feedback@nsc.com
Tel: 81-3-5639-7560
www.national.com
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Audio
Applications
www.ti.com/audio
amplifier.ti.com
dataconverter.ti.com
www.dlp.com
Communications and Telecom www.ti.com/communications
Amplifiers
Data Converters
DLP® Products
DSP
Computers and Peripherals
Consumer Electronics
Energy and Lighting
Industrial
www.ti.com/computers
www.ti.com/consumer-apps
www.ti.com/energy
dsp.ti.com
www.ti.com/industrial
www.ti.com/medical
www.ti.com/security
Clocks and Timers
Interface
www.ti.com/clocks
interface.ti.com
logic.ti.com
Medical
Security
Logic
Space, Avionics and Defense www.ti.com/space-avionics-defense
Transportation and Automotive www.ti.com/automotive
Power Mgmt
Microcontrollers
RFID
power.ti.com
microcontroller.ti.com
www.ti-rfid.com
Video and Imaging
www.ti.com/video
OMAP Mobile Processors www.ti.com/omap
Wireless Connectivity www.ti.com/wirelessconnectivity
TI E2E Community Home Page
e2e.ti.com
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2011, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明