LMH0302 3Gbps HD/SD SDI Cable Driver General Description Features The LMH0302 3Gbps HD/SD SDI Cable Driver is designed for use in SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital video applications. The LMH0302 drives 75Ω transmission lines (Belden 1694A, Belden 8281, or equivalent) at data rates up to 2.97 Gbps. The LMH0302 provides two selectable slew rates for SMPTE 259M and SMPTE 424M / 292M compliance. The output driver may be powered down via the output driver enable pin. The LMH0302 is powered from a single 3.3V supply. Power consumption is typically 125 mW in SD mode and 165 mW in HD mode. The LMH0302 is available in a 16-pin LLP package. ■ SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE ■ ■ ■ ■ ■ ■ ■ ■ 259M compliant Data rates to 2.97 Gbps Differential input 75Ω differential output Selectable slew rate Output driver power down control Single 3.3V supply operation Industrial temperature range: −40°C to +85°C Typical power consumption: 125 mW in SD mode and 165 mW in HD mode ■ 16–pin LLP package ■ Footprint compatible with the LMH0002SQ ■ Replaces the Gennum GS2978 Applications ■ SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital interfaces ■ Digital video routers and switches ■ Distribution amplifiers Typical Application 20214602 © 2007 National Semiconductor Corporation 202146 www.national.com LMH0302 3Gbps HD/SD SDI Cable Driver November 14, 2007 LMH0302 ESD Rating (HBM) ESD Rating (MM) ESD Rating (CDM) Absolute Maximum Ratings (Note 1) Supply Voltage: Input Voltage (all inputs) Output Current Storage Temperature Range Junction Temperature Lead Temperature (Soldering 4 Sec) Package Thermal Resistance θJA 16-pin LLP θJC 16-pin LLP −0.5V to 3.6V −0.3V to VCC+0.3V 28mA −65°C to +150°C +125°C 4.5 kV 250V 2 kV Recommended Operating Conditions Supply Voltage (VCC – VEE): Operating Free Air Temperature (TA) +260°C 3.3V ±5% −40°C to +85°C +64°C/W +26°C/W DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3). Symbol Parameter VCMIN Input Common Mode Voltage VSDI Input Voltage Swing VCMOUT Output Common Mode Voltage VSDO Output Voltage Swing VIH Input Voltage High Level VIL InputVoltage Low Level ICC Supply Current www.national.com Conditions Reference SDI, SDI Differential Min Typ 1.1 + VSDI/2 100 SDO, SDO Single-ended, 75Ω load, RREF = 750Ω 1% Units V 2200 mVP−P VCC – VSDO 720 SD/HD, ENABLE Max VCC – VSDI/2 800 V 880 2.0 mVP-P V 0.8 V SD/HD = 0, SDO/SDO enabled 50 59 mA SD/HD = 0, SDO/SDO disabled 26 33 mA SD/HD = 1, SDO/SDO enabled 38 48 mA SD/HD = 1, SDO/SDO disabled 15 22 mA 2 Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol Parameter DRSDI Input Data Rate tjit Additive Jitter tr,tf Output Rise Time, Fall Time Conditions 2.97 Gbps Duty Cycle Distortion tOS Output Overshoot RLSDO Output Return Loss Min Typ SDO, SDO Max Units 2970 Mbps 20 psP-P 1.485 Gbps 18 psP-P 270 Mbps 15 SD/HD = 0, 20% – 80%, 90 SD/HD = 1, 20% – 80% Mismatch in Rise/Fall Time Reference SDI, SDI 400 psP-P 130 ps 800 ps SD/HD = 0 30 ps SD/HD = 1 50 ps SD/HD = 0, 2.97 Gbps, (Note 4) 27 ps SD/HD = 0, 1.485 Gbps, (Note 4) 30 ps SD/HD = 1, (Note 4) 100 ps SD/HD = 0, (Note 4) 10 % SD/HD = 1, (Note 4) 8 % 5 MHz - 1.5 GHz, (Note 5) 15 dB 1.5 GHz - 3.0 GHz, (Note 5) 10 dB Note 1: "Absolute Maximum Ratings" are those parameter values beyond which the life and operation of the device cannot be guaranteed. The stating herein of these maximums shall not be construed to imply that the device can or should be operated at or beyond these values. The table of "Electrical Characteristics" specifies acceptable device operating conditions. 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 VEE = 0 Volts. Note 3: Typical values are stated for VCC = +3.3V and TA = +25°C. Note 4: Specification is guaranteed by characterization. Note 5: Output return loss is dependent on board design. The LMH0302 meets this specification on the SD302 evaluation board. 3 www.national.com LMH0302 AC Electrical Characteristics LMH0302 Connection Diagram 20214605 The exposed die attach pad is a negative electrical terminal for this device. It should be connected to the negative power supply voltage. 16-Pin LLP Order Number LMH0302SQ See NS Package Number SQB16A Pin Descriptions Pin Name Description 1 SDI Serial data true input. 2 SDI Serial data complement input. 3 VEE Negative power supply (ground). 4 RREF Output driver level control. Connect a resistor to VCC to set output voltage swing. 5 NC No connect. Not bonded internally. 6 ENABLE Output driver enable. When low, the SDO/SDO output driver is powered off. ENABLE has an internal pulllup. 7 NC No connect. Not bonded internally. 8 NC No connect. Not bonded internally. 9 VCC Positive power supply (+3.3V). 10 SD/HD Output slew rate control. Output rise/fall time complies with SMPTE 424M / 292M when low and SMPTE 259M when high. 11 SDO Serial data complement output. 12 SDO Serial data true output. 13 NC No connect. Not bonded internally. 14 NC No connect. Not bonded internally. 15 NC No connect. Not bonded internally. 16 NC No connect. Not bonded internally. DAP VEE Connect exposed DAP to negative power supply (ground). www.national.com 4 the RREF network should be removed to minimize parasitic capacitance. INPUT INTERFACING The LMH0302 accepts either differential or single-ended input. The inputs are self-biased, allowing for simple AC or DC coupling. DC-coupled inputs must be kept within the specified common-mode range. OUTPUT SLEW RATE CONTROL The LMH0302 output rise and fall times are selectable for either SMPTE 259M or SMPTE 424M / 292M compliance via the SD/HD pin. For slower rise and fall times, or SMPTE 259M compliance, SD/HD is set high. For faster rise and fall times, or SMPTE 424M and SMPTE 292M compliance, SD/HD is set low. OUTPUT INTERFACING The LMH0302 uses current mode outputs. Single-ended output levels are 800 mVP-P into 75Ω AC-coupled coaxial cable with an RREF resistor of 750Ω. The RREF resistor is connected between the RREF pin and VCC. The only resistor value that should be used for RREF is 750Ω.. The RREF resistor should be placed as close as possible to the RREF pin. In addition, the copper in the plane layers below OUTPUT ENABLE The SDO/SDO output driver can be enabled or disabled with the ENABLE pin. When set low, the output driver is powered off. ENABLE has an internal pullup. 5 www.national.com LMH0302 Device Operation LMH0302 Physical Dimensions inches (millimeters) unless otherwise noted 16-Pin LLP Order Number LMH0302SQ NS Package Number SQB16A www.national.com 6 LMH0302 Notes 7 www.national.com LMH0302 3Gbps HD/SD SDI Cable Driver Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Design Support Amplifiers www.national.com/amplifiers WEBENCH www.national.com/webench Audio www.national.com/audio Analog University www.national.com/AU Clock Conditioners www.national.com/timing App Notes www.national.com/appnotes Data Converters www.national.com/adc Distributors www.national.com/contacts Displays www.national.com/displays Green Compliance www.national.com/quality/green Ethernet www.national.com/ethernet Packaging www.national.com/packaging Interface www.national.com/interface Quality and Reliability www.national.com/quality LVDS www.national.com/lvds Reference Designs www.national.com/refdesigns Power Management www.national.com/power Feedback www.national.com/feedback Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www.national.com/led PowerWise www.national.com/powerwise Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors Wireless (PLL/VCO) www.national.com/wireless THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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