01.08.28 F0601720B ♦ Features • high speed operation DC ~ 266 Mb/s NRZ • Differential ECL compatible interface • 5.0 V single power supply • Pulse distortion control 0 ~ 350 psec High Speed GaAs LED Driver ♦ Applications • LED driver of an optical transmitter circuit up to 266 Mb/s ♦ Functional Description The F0601720B is a high performance GaAs LED driver IC applying in an optical transmitter module up to 266 Mb/s NRZ data rate. The F0601720B specifies the rise time and the fall time of 600 psec (10%-90%) typically. It features the single 5.0 V supply operation. F0601720B GaAs LED Driver IC ♦ Absolute Maximum Ratings Ta=25 °C, unless specified Parameter Symbol Absolute Maximum Ratings Units Supply Voltage VCC 7.0 V Supply Current ICC 100 mA Modulation Current IOUT1,2 100 mA Power Dissipation Pdis 1 W VIN1,2 VCC ~ Max (-0.5, VCC -3.0) V Ta 0 ~ 70 °C Tstg -55 ~ +125 °C Input Voltage Ambient Operating Temperature Strage Temperature ♦ Recommended Operating Conditions VEE= GND Parameter Min. Value Typ. Max. Units VCC 4.75 5.0 5.25 V Ta 0 25 70 °C Symbol Supply Voltage Ambient Operating Temperature F0601720B GaAs LED Driver IC ♦ Electrical Characteristics VCC=5 V, Ta=25 °C, unless specified Value Parameter Supply Current Input Voltage Symbol Conditions Typ. Max. 90 100 150 mA 3.830 4.045 4.265 V 3.050 3.295 3.550 V - -150 - 150 µA Tr1:open 40 - 60 mA Tr2=GND 60 - 80 mA - - 5 µΑ Tr1:open 3.8 - 4.1 V Tr2=GND 3.45 - 3.75 V ICC VIH Differential Input VIL Input Current Modulation Current *1) Units Min. IIN1, IIN2 IOUT1 Leakage Current Isdleak1 ECL Reference Voltage VDD *1) Vsd1=VCC at VIN1=VIL, VIN2=VI Rise Time tr *2) RL=15Ω - - 1 nsec Fall Time rf *2) RL=15Ω - - 1 nsec *1) Adjusting by valuable resistors *2) Measuring by the circuits shown in Figures 3 and 4 F0601720B GaAs LED Driver IC ♦ User’s Guide (1) Application of Dly1 and Dly2 The two terminals permit presettable compensation of pulse width distortion at input signals In1 and In2 by connecting to GND as shown in Table2. Table 1. Dly1 Presetting open GND open 1ps 150ps GND 250ps 350ps Dly2 (2) Application of Tr1 The Tr1 terminal permits presettable voltage at Vbb by adjusting the valuable resistor (0 to 1kΩ) connected with GND as shown in Table2. Table 2. Terminal Without control With control Tr1 open 0 ~ 1kΩ Vbb 3.8V ~ 4.1V 3.72V (Recommended setting voltage) F0601720B GaAs LED Driver IC ♦ Block Diagram GND VCC Sd1 OUT1 OUT2 Sd2 IN1 INBUF BUFFER IN2 A OUTBUF DELAY1 DELAY2 B PREDISTORTION BUFFER FOR OUTBUF Vref DELAY CONTROL GND Temp Dly1 VCC VIN1, VIN2 OUT1, OUT2 Sd1,Sd2 Dly1,Dly2 Tr1 Tr2 VDD Temp Dly2 Tr1 Tr2 VDD : Supply Voltage : Differential Input : Differential Output (LED should be connected to Out1) : Output Wave Form Control : Pulse Width Distortion Control : Vbb Control : Testing : ECL Reference Voltage : Temperature Measurement Fig. 1 F0601720B GaAs LED Driver IC ♦ Die Pad Descriptions (13) (12) (11) (10) (14) (9) (15) (16) (7) (17) (6) (1) No. Symbol (8) (2) (3) Center Coordinates (µm) (4) No. (5) Symbol Center Coordinates (µm) 1 Sd1 (80,80) 11 VIN (480,1310) 2 OUT1 (260,80) 12 Temp (295,1310) 3 GND2 (445,80) 13 VDD (115,1310) 4 OUT2 (630,80) 14 GND1 (80,1130) 5 Sd2 (810,80) 15 GND1 (80,950) 6 VCC2 (810,590) 16 Tr2 (80,770) 7 VCC1 (810,770) 17 Tr1 (80,590) 8 Dly2 (810,950) O (0,0) 9 Dly1 (810,1130) A (890,1390) 10 VIN2 (810,1310) F0601720B GaAs LED Driver IC ♦ Measurement Block DIiagram (1) DC Characteristics +5.0V 330pF 15Ω VCC 15Ω Sd1 OUT1 VIN1 OUT2 DC Power Source & Monitor VIN2 VDD DC Power Source & Monitor Tr1 Dly1 Tr2 Dly2 Vee(GND) Sd2 (2) AC Characteristics 51Ω 22Ω Trig. Pulse Pattern Generator VIN1 VCC (GND) Sd1 OUT1 Sampling Oscilloscope OUT2 VIN2 VDD DC Power Source & Monitor Vee 0.1µF -0.5V Sd2 GaAs LED Driver IC F0601720B ♦ Precautions Owing to their small dimensions, the GaAs FET’s from which the F0601720B is designed are easily damaged or destroyed if subjected to large transient voltages. Such transients can be generated by power supplies when switched on if not properly decoupled. It is also possible to induce spikes from static-electricity-charged operations or ungrounded equipment. Electron Device Department