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MAX3643ETG+ Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX3643ETG+ Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 15 page 155Mbps to 2.5Gbps Burst-Mode Laser Driver 4 _______________________________________________________________________________________ Note 1: DC parameters are production tested at TA = +25°C, guaranteed by design and characterization at TA = -40°C. AC parameters are guaranteed by design and characterization. Note 2: For 10mA ≤ IMOD ≤ 85mA and 4mA ≤ IBIAS ≤ 70mA. Note 3: Deterministic jitter measured with a continuous pattern of 27-1 PRBS, 80 ones, 27-1 PRBS, 80 zeros at 1.25Gbps, and both LVPECL inputs terminated by the network shown in Figure 3. Note 4: Random jitter, rise time, fall time measured with 0000011111 pattern at 1.25Gbps. Note 5: Voltage difference between VMSET and MODSET or VBSET and BIASSET excluding IR drops. The maximum operating voltage at VMSET or VBSET must be less than 1.4V for proper operation. Note 6: Turn-on/-off time is when the BEN+/BEN- LVPECL inputs are used to control modulation and bias currents. Note 7: Burst-enable delay is measured between the time at which the rising edge of the differential burst-enable input reaches the midpoint, and the time at which the combined output currents (bias plus modulation) reach 90% of their final level. Note 8: Burst-disable delay is measured between the time at which the falling edge of the differential burst-enable input reaches the midpoint, and the time at which the combined output currents (bias plus modulation) fall below 10% of the bias-on current. Note 9: Droop measured with sample/hold output load of 10M Ω. Note 10: Enable delay is measured between the time at which the falling edge of the EN input reaches ≤ 0.8V, and the time at which the combined output currents (bias plus modulation) reach 90% of their final level. Note 11: Disable delay is measured between the time at which the rising edge of the EN input reaches ≥ 2V, and the time at which the combined output currents (bias plus modulation) fall below 10% of the bias-on current. Note 12: Excelight SLT2886-LR laser. Note 13: Current gain stability = [(Gain – nominal Gain) / nominal Gain], nominal Gain at VCC = 3.3V, TA = +25°C. Note 14: Gain linearity = (Gainmax – Gainmin), Gainavg = Gainmax + Gainmin Gainavg 2 Note 15: Gain matching = , nominal at VCC = 3.3V, TA = +25°C. mod / mod / mod / Gain Gainbias Gain nom Gainbiasnom Gain nom Gainbiasnom − ELECTRICAL CHARACTERISTICS (continued) (VCC = 3.0V to 3.6V, TA = -40°C to +85°C. Typical values are at VCC = 3.3V, TA = +25°C, IBIAS = 20mA, IMOD = 30mA, unless other- wise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Sampling Error Final value measured after 10µs (MDOUT - MDIN), burst width > 576ns 3 ±14 mV BANDGAP VOLTAGE REFERENCE SPECIFICATIONS VREF Output RL > 10k , CL < 50pF 1.175 1.235 1.295 V MODULATION/BIAS CURRENT DISABLE Enable Time 5mA < IBIAS, 10mA < IMOD (Note 10) 5.5 µs Disable Time (Notes 2, 11) 375 ns RIMAX Range 3 15 k RIMAX = 3k 155 RIMAX = 5k 100 150 Current Limit (Tested with IBIAS = IMOD) IBIAS+IMOD RIMAX = 10k 50 75 mA OPTICAL EVALUATION 155.52Mbps 49 622.08Mbps 45 1.24416Gbps 38 Eye Margin (Note 12) 2.48832Gbps 18 % |
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