LMH0001SQ

LMH0001 SMPTE 259M / 344M Serial Digital Cable Driver January 9, 2008 LMH0001 SMPTE 259M / 344M Serial Digital Cable Driver General Description The LMH0001 SMPTE 259M / 344M Serial Digital Cable Driver is designed for use in SMPTE 259M / 344M serial digital video applications. The LMH0001 drives 75Ω transmission lines (Belden 8281, Belden 1694A or equivalent) at data rates up to 540 Mbps. The output voltage swing of the LMH0001 is adjustable via a single external resistor. The LMH0001 is powered from a single 3.3V supply. Power consumption is typically 125mW. The LMH0001 is available in a 16-pin LLP package. Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ SMPTE 259M and SMPTE 344M compliant Data rates to 540 Mbps Supports DVB-ASI at 270 Mbps Differential input 75Ω differential output Adjustable output amplitude Single 3.3V supply operation Industrial temperature range: −40°C to +85°C 125mW typical power consumption 16–pin LLP package Footprint compatible with the LMH0002SQ and the GS9078A. Applications ■ ■ ■ ■ ■ ■ ■ ■ SMPTE 259M and SMPTE 344M serial digital interfaces DVB-ASI applications Sonet/SDH and ATM interfaces Digital routers and switches Distribution amplifiers Buffer applications Set top boxes Security cameras Typical Application 30027202 © 2008 National Semiconductor Corporation 300272 www.national.com LMH0001 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 +150°C +260°C +78.9°C/W +42.7°C/W ESD Rating (HBM) ESD Rating (MM) 5kV 250V Recommended Operating Conditions Supply Voltage (VCC – VEE): Operating Free Air Temperature (TA) 3.3V ±5% −40°C to +85°C DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3). Symbol Parameter VCMIN VSDI VCMOUT VSDO Input Common Mode Voltage Input Voltage Swing Output Common Mode Voltage Output Voltage Swing Single-ended, 75Ω load, RREF = 750Ω 1% Single-ended, 75Ω load, RREF = 590Ω 1% ICC Supply Current (Note 5) Differential SDO, SDO Conditions Reference SDI, SDI Min 1.6 + VSDI/2 100 VCC – VSDO 750 900 800 1000 38 850 1100 43 Typ Max VCC – VSDI/2 2000 Units V mVP−P V mVP-P mVP-P mA AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol Parameter DRSDI tjit tr,tf Input Data Rate Additive Jitter Output Rise Time, Fall Time Mismatch in Rise/Fall Time Duty Cycle Distortion tOS RLSDO Output Overshoot Output Return Loss Conditions (Note 4) 270 Mbps 20% – 80% (Note 4) (Note 4) (Note 4) (Note 6) 15 20 Reference SDI, SDI SDO, SDO 400 18 560 800 30 100 8 Min Typ Max 540 Units Mbps psP-P ps ps ps % 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: Maximum ICC is measured at VCC = +3.465V and TA = +70°C. Note 6: Output return loss is dependent on board design. The LMH0001 meets this specification on the SD001SQ evaluation board from 5MHz to 1.5GHz. www.national.com 2 LMH0001 Connection Diagram 30027205 16-Pin LLP Order Number LMH0001SQ See NS Package Number SQB16A Pin Descriptions SOIC Pin # 1 2 3 4 5 7 8 — LLP Pin # 1 2 3 4 9 11 12 SDI SDI VEE RREF VCC SDO SDO Name Description Serial data true input. Serial data complement input. Negative power supply (ground). Output driver level control. Connect a resistor to VCC to set output voltage swing. Positive power supply (+3.3V). Serial data complement output. Serial data true output. No connect. 5, 6, 7, 8, NC 10, 13, 14, 15, 16 DAP VEE — Connect exposed DAP to negative power supply (ground). 3 www.national.com LMH0001 Device Operation INPUT INTERFACING The LMH0001 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. SDI and SDI are self-biased at approximately 2.1V with VCC = 3.3V. Figure 1 shows the differential input stage for SDI and SDI. OUTPUT INTERFACING The LMH0001 uses current mode outputs. Single-ended output levels are 800 mVP-P into 75Ω AC-coupled coaxial cable (with RREF = 750Ω). Output level is controlled by the value of the RREF resistor connected between the RREF pin and VCC. The RREF resistor should be placed as close as possible to the RREF pin. In addition, the copper in the plane layers below the RREF network should be removed to minimize parasitic capacitance. 30027204 FIGURE 1. Differential Input Stage for SDI and SDI. www.national.com 4 LMH0001 Physical Dimensions inches (millimeters) unless otherwise noted 16-Pin LLP Order Number LMH0001SQ NS Package Number SQB16A 5 www.national.com LMH0001 SMPTE 259M / 344M Serial Digital Cable Driver Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers Audio Clock Conditioners Data Converters Displays Ethernet Interface LVDS Power Management Switching Regulators LDOs LED Lighting PowerWise Serial Digital Interface (SDI) Temperature Sensors Wireless (PLL/VCO) www.national.com/amplifiers www.national.com/audio www.national.com/timing www.national.com/adc www.national.com/displays www.national.com/ethernet www.national.com/interface www.national.com/lvds www.national.com/power www.national.com/switchers www.national.com/ldo www.national.com/led www.national.com/powerwise www.national.com/sdi www.national.com/tempsensors www.national.com/wireless WEBENCH Analog University App Notes Distributors Green Compliance Packaging Design Support www.national.com/webench www.national.com/AU www.national.com/appnotes www.national.com/contacts www.national.com/quality/green www.national.com/packaging www.national.com/quality www.national.com/refdesigns www.national.com/feedback Quality and Reliability Reference Designs Feedback THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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