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CLC001AJE

CLC001AJE

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    SOIC8_150MIL

  • 描述:

    IC DRIVER 1/0 8SOIC

  • 数据手册
  • 价格&库存
CLC001AJE 数据手册
CLC001 CLC001 Serial Digital Cable Driver with Adjustable Outputs Literature Number: SNLS066B CLC001 Serial Digital Cable Driver with Adjustable Outputs General Description Applications The CLC001 is a monolithic, high-speed cable driver designed 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 transitioninduced jitter. The output voltage swing is adjustable from 800 mVp-p to 1.0 Vp-p using an external resistor. Digital routers and distribution amplifiers Coaxial cable driver for digital transmission lines Twisted pair driver Serial digital video interfaces for the commercial and broadcast industry n SMPTE, Sonet/SDH, and ATM compatible driver n Buffer applications n n n n 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 transmission applications. The CLC001 is powered from a single +3.3V supply and comes in a small 8-pin SOIC package. Key Specifications n n n n 400 ps rise and fall times Data rates to 622 Mbps 100 mV differential input threshold Low residual jitter 10132910 622 Mbps Eye Pattern with STM-4 Signal Mask Features n n n n n Connection Diagram (8-Pin SOIC) Adjustable output amplitude Differential input and output Accepts LVPECL or LVDS input swings Low power dissipation Single +3.3V supply 10132902 Order Number CLC001AJE See NS Package Number M08A © 2006 National Semiconductor Corporation DS101329 www.national.com CLC001 Serial Digital Cable Driver with Adjustable Outputs February 2006 CLC001 Typical Application 10132901 www.national.com 2 θJC Surface Mount AJE Reliability Information If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage 4V Output Current 27 mA Maximum Junction Temperature Storage Temperature Range Transistor count −65˚C to +150˚C Lead Temperature ≥ 7 kV ESD Rating (MM) ≥ 500V Package Thermal Resistance θJA Surface Mount AJE Supply Voltage Range (VDD - VSS) +3.0V to +3.6V Operating Free Air Temperature (TA) -40˚C to +85˚C RBB Range (applied to VBB input) (Note 6) +300˚C ESD Rating (HBM) 291 Recommended Operating Conditions +125˚C (Soldering 10 seconds) 105˚C/W 1.3kΩ to 11.5kΩ 125˚C/W Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified (Notes 2 and 3) Symbol Parameter Conditions Min Typ Max Units RL = 75Ω 1%,RREF = 1.91 kΩ 1% (for 800 mVp-p),Figure 1 720 800 880 mV RL = 75Ω 1%,RREF = 1.5 kΩ 1% (for 1.0 Vp-p),Figure 1 900 1000 1100 mV 0 +100 mV OUTPUT DC SPECIFICATIONS VSDO Serial Driver Output Voltage INPUT DC SPECIFICATIONS VTH Differential Input High Threshold VCM = +0.05V or +1.2V or +3.25V, VTL Differential Input Low Threshold VDD = 3.3V −100 VCMR Common Mode Voltage Range VID = 100mV, VDD = 3.3V 0.05 IIN Input Current VIN = 0V or +3.0V, VDD = 3.6V or 0V IINB Input Current Balance VIN = 0V or +3.0V, VDD = 3.6V or 0V, (Note 8) 0.23 RL = 75Ω,RREF = 1.91 kΩ 1%(VSDO = 800 mVp-p @ 270 Mbps) 70 115 mA RL = 75Ω,RREF = 1.5 kΩ 1%(VSDO = 1.0 Vp-p @ 622 Mbps) 85 130 mA 0 ±1 mV 3.25 V ± 10 µA µA SUPPLY CURRENT IDD Total Dynamic Power Supply Current (includes load current) MISCELLANEOUS PARAMETERS LGEN Output Inductance RGEN Output Resistance IBB VBB Current 6 nH 25 kΩ RREF = 1.91 kΩ 1%, (Note 6) 250 µA RREF = 1.5 kΩ 1%, (Note 6) 315 µA 3 www.national.com CLC001 Absolute Maximum Ratings (Note 1) CLC001 AC Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified (Note 3) Symbol Parameter Conditions Min Typ Max Units 400 800 ps tr, tf Rise time, Fall time tos Output overshoot tjit Output jitter (Note 7) 25 ps tpd Propagation delay (Note 5) 1.9 ns 20%–80%, (Notes 4, 5) 5 % 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 VSS = 0V. Note 3: Typical values are at 25˚C and 3.3V. Note 4: This parameter is Guaranteed by Design. Note 5: RL = 75Ω, AC-coupled at 270 Mbps, RREF = 1.91 kΩ 1% (for VSDO = 800 mVp-p ± 10%), CL not greater than 5pF (See Figure 1) Note 6: The VBB 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 power other devices. Note 7: RL = 75Ω, AC-coupled at 622 Mbps, RREF = 1.5 kΩ 1% (for VSDO = 1.0 Vp-p ± 10%), clock pattern input. Note 8: Input Current Balance (IINB) is the difference between the Input Current (IIN) on VIN+ and VIN− for the same bias condition. Test Loads 10132904 FIGURE 1. Test Loads www.national.com 4 CLC001 Test Loads (Continued) 10132903 FIGURE 2. Test Circuit Pin Descriptions Pin # Name Description 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 VIN+ Positive input pin 3 VIN- Negative input pin 4 RREF Output driver level control. Connect a resistor to ground to set output voltage swing. 5 VSS Negative power supply 6 SDO Serial data true output 7 SDO Serial data complement output 8 VDD Positive power supply 5 www.national.com CLC001 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. (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 impedance of the line being driven. The actual resistor value is media specific, but typically is between 100 and 120Ω depending 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 CLC001 Device Operation CLC001 Device Operation 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. (Continued) Figure 7 shows an AC-coupled, twisted pair cable application. 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. (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 impedance of the line being driven. The actual resistor value is 10132909 FIGURE 9. LVDS, DC-coupled 9 www.national.com CLC001 Device Operation CLC001 Device Operation vices. The evaluation boards can be ordered through National’s Distributors. Supplies are limited, please check for current availability. (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 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. Output levels range from 800 mVp-p to 1.0 Vp-p ± 10% into 75Ω AC-coupled, back-matched loads. Output level is controlled 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 to Figure 10 for the output level’s sensitivity to RREF. 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. From the WWW, the following information may be viewed / downloaded for most evaluation boards: www.national.com/ appinfo/interface • 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 PCB Layout Recommendations Printed circuit board layout affects the performance of the CLC001. The following guidelines will aid in achieving satisfactory 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. • Provide short, grounded guard traces located — under the centerline of the package, — 0.1" (2.5 mm) from the package pins — on both top and bottom of the board with connecting vias. 10132913 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- www.national.com 10 CLC001 Serial Digital Cable Driver with Adjustable Outputs 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. 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