S3044 AMCC (Applied Micro Circuits Corp), S3044 Datasheet
S3044
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S3044 Summary of contents
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DEVICE SPECIFICATION 2.5 GBPS LASER DRIVER 2.5 GBPS LASER DRIVER FEATURES • 2.5 Gbps data rate • Automatic Laser Power Control • Laser Bias Enable Input • Differential PECL Inputs • Temperature Compensated Reference Voltage • Laser Fault and Fail ...
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S3049 Figure 2. Functional Block Diagram TD+ DFF TD- MUX CLKSEL TDCLK+ TDCLK- Ref Gen Circuit DISABLE C DEL NOM Shut Down V +V Control NOM Vnom + _ 2.5 GBPS LASER DRIVER +5V IMOD+ IMOD– ...
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GBPS LASER DRIVER DETAILED DESCRIPTION Reference Generator The reference generator provides temperature com- pensated reference voltage, VREF, which is used to program the laser diode bias current, I modulation current and the photo-diode refer- MOD ence current, ...
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S3049 Table 1. Pin Assignment and Descriptions ...
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GBPS LASER DRIVER Table 1. Pin Assignment and Descriptions (Continued ...
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S3049 Figure 3. 32 TQPF Package TOP VIEW Thermal Management 2.5 GBPS LASER DRIVER BOTTOM ...
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GBPS LASER DRIVER Figure 4. S3049 Pinout VEE2 IPD CDEL VEE1 VREF IPSET LSFAIL LSFAULT July 27, 1999 / Revision S3049 TQFP 20 5 Top View ...
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S3049 Figure 5. Bonding Pad Location Y - Axis VEE3 32 33 IMOD- 34 IMOD- 35 VEE2 36 IMOD+ 37 IMOD+ VEE2 38 VEE2 39 40 VCC2 VCC2 41 VCC2 (0,0) 8 2.15 ...
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GBPS LASER DRIVER Table 2. Pad Assignment and Description ...
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S3049 Table 2. Pad Assignment and Description (Continued ...
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GBPS LASER DRIVER Table 3. Absolute Maximum Ratings ...
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S3049 Table 6. Laser Bias (VCC-VEE = 5V 5 -40˚C to 85˚C, 25˚C for die ...
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GBPS LASER DRIVER Table 8. Power Initialization and Latched Shutdown (VCC-VEE = 5V 5 -40˚C to 85˚C, 25˚C for die ...
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S3049 Resistor and Capacitor Values The resistors and capacitors can be selected using the following plots and formula. Figure 6. Bias Current vs. IBSET Resistor Value ...
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GBPS LASER DRIVER Figure 8. Photo Diode Current vs. IPSET Resistor Value 1.2 1 0.8 0.6 0.4 0 0.5 1 Figure 9. APC Loop Compensation Bias Current vs. IBCMP Resistor Value ...
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S3049 Timing for Start Up Sequence Figure 10. DISABLE Unasserted V CC > 4.4V LSFAULT DISABLE LASER CURRENTS ENABLED (TRANSMIT DATA) APC LOOP SETTLING ENABLE SHUTDOWN Figure 11. DISABLE Asserted V CC > 4.4V LSFAULT DISABLE LASER CURRENTS ENABLED (TRANSMIT ...
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GBPS LASER DRIVER APPLICATION INFORMATION Power Dissipation Across Device The power dissipation in the package must be kept below 640mW. Quiescent power is 399mW. Therefore, power dissipation due to the laser currents must be kept below 240mW. Connecting to ...
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S3049 Typical Operating Characteristics Figure 13. Supply Current vs. Temperature, I 62.00 60.00 58.00 56.00 54.00 52.00 50.00 -40 Figure 14. Modulation Current vs. Temperature -60 - ...
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GBPS LASER DRIVER Figure 15. Eye Diagram, I July 27, 1999 / Revision C = 30mA, 2.5 Gbps –1 Pattern MOD 50 ps/DIV S3049 19 ...
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S3049 Ordering Information – Applied Micro Circuits Corporation • 6290 Sequence Dr., San Diego, CA 92121 Phone: (858) ...