LMH0202 Dual SMPTE 292M / 259M Serial Digital Cable Driver General Description Features The LMH0202 Dual SMPTE 292M / 259M serial digital cable driver is a monolithic, high-speed cable driver designed for use in SMPTE 292M / 259M serial digital video and ITU-T G.703 serial digital data transmission applications. The LMH0202 drives 75 transmission lines (Belden 8281, Belden 1694A or equivalent) at data rates up to 1.485 Gbps. The LMH0202 provides two selectable slew rates for SMPTE 259M and SMPTE 292M compliance. The output voltage swing is adjustable via a single external resistor. The LMH0202 offers the flexibility to implement either dual differential inputs or a single differential input (externally routed via PCB) to dual differential outputs. The latter option provides an ideal solution for DVB-ASI applications where only the non-inverted outputs are typically used. The LMH0202 is powered from a single 3.3V supply. Power consumption is typically 250 mW in SD mode and 300 mW in HD mode. SMPTE 292M, SMPTE 344M and SMPTE 259M compliant Data rates to 1.485 Gbps Dual differential inputs Dual 75 differential outputs Two selectable slew rates Adjustable output amplitude Single 3.3V supply operation Commercial temperature range: 0C to +70C Typical power consumption: 250 mW in SD mode and 300 mW in HD mode Applications SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital interfaces DVB-ASI applications Sonet/SDH and ATM interfaces Digital routers and switches Distribution amplifiers Buffer applications Video cameras Connection Diagram 20173101 16-Pin TSSOP Order Number LMH0202MT Package Number MTC16 (c) 2012 Texas Instruments Incorporated 201731 SNLS212B www.ti.com LMH0202 Dual SMPTE 292M / 259M Serial Digital Cable Driver February 28, 2012 LMH0202 Typical Application 20173102 www.ti.com 2 Supply Voltage: Input Voltage (all inputs) Output Current Storage Temperature Range Junction Temperature Lead Temperature (Soldering 4 Sec) Package Thermal Resistance JA 16-pin TSSOP JC 16-pin TSSOP -0.5V to 3.6V -0.3V to VCC+0.3V 28 mA -65C to +150C +150C 5 kV 250V Recommended Operating Conditions Supply Voltage (VCC - VEE): Operating Free Air Temperature (TA) LMH0202MT +260C 3.3V 5% 0C to +70C +125C/W +105C/W DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 2, Note 3). Symbol Parameter VCMIN Input Common Mode Voltage VSDI Input Voltage Swing VCMOUT Output Common Mode Voltage VSDO Output Voltage Swing Conditions Reference Min SDI1, SDI1, SDI2, SDI2 Differential Max Units 1.6 + VSDI/2 VCC - VSDI/2 V 100 2000 mVP-P SDO1, SDO1, SDO2, SDO2 Single-ended, 75 load, RREF1 = 750 1%, Typ VCC - VSDO V 750 800 850 mVP-P 900 1000 1100 mVP-P RREF2 = 750 1% Single-ended, 75 load, RREF1 = 590 1%, RREF2 = 590 1% VSDHD SD/HD Input Voltage Min for SD SD/HD1, SD/HD2 Max for HD ISDHD SD/HD Input Current ICC Supply Current 2.4 V 0.8 3.7 V A SD/HD1 = 0, SD/HD2 = 0, (Note 5) 90 98 mA SD/HD1 = 1, SD/HD2 = 1, (Note 5) 76 86 mA Typ Max Units 1485 Mbps AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol Parameter Conditions Reference DRSDI Input Data Rate (Note 4) SDI1, SDI1, SDI2, SDI2 tjit Additive Jitter 1.485 Gbps SDO1, SDO1, SDO2, SDO2 270 Mbps tr,tf Output Rise Time, Fall Time Min SD/HD1 = 0, SD/HD2 = 0, 20% - 80%, (Note 6) SD/HD1 = 1, SD/HD2 = 1, 20% - 80%, (Note 6) 400 26 psP-P 18 psP-P 120 220 ps 560 800 ps Mismatch in Rise/Fall Time (Note 4) 30 ps tOS Output Overshoot (Note 4) 8 % RLSDO Output Return Loss (Note 7) 15 20 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. 3 www.ti.com LMH0202 ESD Rating (HBM) ESD Rating (MM) Absolute Maximum Ratings (Note 1) LMH0202 Note 3: Typical values are stated for VCC = +3.3V and TA = +25C. Note 4: Specification is guaranteed by characterization. Note 5: Maximum ICC is measured at VCC = +3.465V and TA = +70C. Note 6: Specification is guaranteed by characterization and verified by test. Note 7: Output return loss is dependent on board design. The LMH0202 meets this specification on the SD202 evaluation board from 5 MHz to 1.5 GHz. Pin Descriptions Pin # Name Description 1 SDI1 Serial data true input. 2 SDI1 Serial data complement input. 3 VEE1 Negative power supply (ground). 4 RREF1 Output driver level control. Connect a resistor to VCC to set output voltage swing. 5 SDI2 Serial data true input. 6 SDI2 Serial data complement input. 7 VEE2 Negative power supply (ground). 8 RREF2 Output driver level control. Connect a resistor to VCC to set output voltage swing. 9 VCC2 Positive power supply (+3.3V). 10 SD/HD2 Output slew rate control. Output rise/fall time complies with SMPTE 292M when low and SMPTE 259M when high. 11 SDO2 Serial data complement output. 12 SDO2 Serial data true output. 13 VCC1 Positive power supply (+3.3V). 14 SD/HD1 Output slew rate control. Output rise/fall time complies with SMPTE 292M when low and SMPTE 259M when high. 15 SDO1 Serial data complement output. 16 SDO1 Serial data true output. Device Operation INPUT INTERFACING The LMH0202 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. 20173104 FIGURE 1. Differential Input Stage for SDI and SDI. www.ti.com 4 OUTPUT INTERFACING The LMH0202 uses current mode outputs. Single-ended output levels are 800 mVP-P into 75 AC-coupled coaxial cable (with RREF = 750). Output level is controlled by the value of the 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. OUTPUT SLEW RATE CONTROL The LMH0202 output rise and fall times are selectable for either SMPTE 259M or SMPTE 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 292M compliance, SD/HD is set low. 20173103 FIGURE 2. Single Differential Input for DVB-ASI 5 www.ti.com LMH0202 DVB-ASI APPLICATIONS The dual differential inputs of the LMH0202 may be externally routed to a single differential input as shown in Figure 2. This provides a solution for DVB-ASI applications where two noninverted outputs are needed. LMH0202 Physical Dimensions inches (millimeters) unless otherwise noted 16-Pin TSSOP Order Number LMH0202MT Package Number MTC16 www.ti.com 6 LMH0202 Notes 7 www.ti.com LMH0202 Dual SMPTE 292M / 259M Serial Digital Cable Driver Notes www.ti.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. 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