F0539951Q 10.0 Gb/s Laser Diode Driver Advance 03.05.27 ♦ Features - Up to 10.0 Gb/s high speed operation - 3.3V single Voltage Supply operation - Differential CML compatible interface - Disable function of modulation current - Modulation current monitoring - Up to 65 mAp-p RF modulation current at an external 25Ω load F0539951Q 10.0Gb/s NRZ Data Rate Laser Diode Driver or Up to 75 mAp-p RF modulation current at an external 15Ω load - Up to 100 mA DC bias current - On-chip 50Ω input terminations - Internal voltage reference for AC coupling ♦ Applications - Laser diode driver of an optical transmitter circuit up to 10.0 Gb/s ♦Functional Description The F0539951Q is a high performance GaAs laser diode driver IC applicable in an optical transmitter circuit up to 10.0 Gb/s NRZ data rate (especially suitable for STM-64 / OC-192). The F0539951Q specifies the rise time and the fall time of 35 ps (20 % - 80 %, 25Ω load) typically. It features the single 3.3V supply operation, the modulation current between 10 mAp-p and 65 mAp-p, and the bias current between 3 mA and 100 mA. F0539951Q 10.0 Gb/s Laser Diode Driver ♦ Absolute Maximum Ratings Ta=25°C, unless specified. Parameter Symbol Value Units Supply Voltage (VSS) VDD - VSS -0.5 to +4.0 V Supply Voltage (VSSM) VDD - VSSM -0.5 to +4.0 V Supply Voltage (VSSB) VDD - VSSB -0.5 to +6.0 V Supply Current*1 ISS 180 mA Supply Current (VSSM) ISSM 150 mA Supply Current (VSSB) ISSB 150 mA Output Current (OUT, OUTB, BIAS) IOUT 150 mA Input Voltage (DIN, DINB) VIN VDD - 2.5 to VDD V Input Voltage (DIS) VINC1 VSS – 0.5 to VDD + 0.5 V Input Voltage (VM) VINC2 VSS to VSS + 1.5 V Input Voltage (VB) VINC3 VSS to VSS + 2.0 V Output Voltage (OUT, OUTB) VOUT VDD – 1.5 to VDD + 1.5 V Output Voltage (BIAS) VBIAS VSSB to VSSB + 3.5V V Output Voltage (MODSEN) VOUTM VSS to VDD V Storage Temperature Tstg -55 to + 125 °C NOTE: *1. Excluding the input current, the modulation current and the bias current. ♦ Recommended Operating Conditions Parameter Value Symbol Unit MIN. TYP. MAX. Supply Voltage VDD - VSS 3.1 3.3 3.5 V Output Voltage VOUT -VDD -1.0 0 1.0 V BIAS Output Voltage VBIAS - VSSB 1.3 1.5 3.0 V Ambient Operating Temperature Ta 0 25 70 °C F0539951Q 10.0 Gb/s Laser Diode Driver ♦ Electrical Characteristics Ta=25°C, VDD- VSS = VDD - VSSM = VDD - VSSB = 3.3V, unless specified Parameters Circuit Current *1 Symbol ISS Value Test Conditions VM - VSS=0[V] Units MIN. TYP. MAX - 95 - mA 0.4 0.8 1.6 Vp-p VB - VSS=0[V] Input Voltage VIN Differential Input RIN Differential - 100 - Ω IMmax 25Ω load - 65 - mAp-p IMmin 25Ω load, VM =VSS - 10 - mAp-p IMdis VDIS=VDD - 0.2V - 2 - mA - 50 - Ω (AC coupled interface) Input Resistor Modulation Peak Current Output Resistor Bias Current RMOD IBmax VBIAS-VSSB =1.3V 100 - - mA IBmin VBIAS-VSSB =1.3V - 3 - mA VB =VSS Input Voltage VDISih Disable operation VDD - 0.2 - VDD V of DIS pin VDISil Enable operation VSS OPEN VSS+0.2 V Modulation Monitor Resistor RMM - 3 - Ω Rise Time Tr RL = 25Ω, 20% - 80% - 35 - ps Fall Time Tf RL = 25Ω, 20% - 80% - 35 - ps 10.0 - - Gb/s Maximum Data Rate fopr NOTE: *1. Excluding the input current, the modulation current and the bias current. F0539951Q 10.0 Gb/s Laser Diode Driver ♦ Block Diagram VDD RMODB RMOD DIN DINB Input Buffer Disable Control Pulse Width Control MOD Mod Buffer MODB DIS PWP PWN VSS 3Ω Bias Buffer MODSEN VSSM VM VSSB VB ♦ PAD Descriptions Symbol Description VDD Supply Voltage VSS, Supply Voltage. VSS, VSSM and VSSB are not connected internally. VSSM, VSSB DIN Positive data input DINB Negative data input MOD Positive modulation output (LD should be connected to this pin.) MODB Negatibe modulation output BIAS Bias current output VM Voltage input that sets the LD modulation peak current VB Voltage input that sets the bias current DIS Voltage input that controls turning on/off modulation current PWP, PWN Pulse Width Control MODSEN Modulation current monitor output BIAS F0539951Q 10.0 Gb/s Laser Diode Driver ♦ Function Table INPUT OUTPUT DIN Current at MOD Current at MODB H ON OFF L OFF ON F0539951Q 10.0 Gb/s Laser Diode Driver ♦ Package Pin Assignments (Top View) 18 19 17 16 15 12 VDD (Bottom of package) 20 11 21 10 22 09 23 08 24 07 01 02 03 04 Pin No. Symbol Pin No. Symbol 01 VDD 13 VDD 02 DIN 14 VDD 03 VDD 15 MODB 04 DINB 16 VDD 05 VDD 17 MOD 06 VDD 18 VDD 07 DIS 19 BIAS 08 MODSEN 20 VSSB 09 VM 21 VSS 10 VSS 22 VB 11 VSSM 23 PWP 12 NC 24 PWN F0539951Q 10.0 Gb/s Laser Diode Driver ♦ Package Drawings 2.5 4.0 ± 0.1 18 13 19 2.5 4.0 ± 0.1 12 24 7 6 2 0.4 1 .3 C0 1 0.22 Dimension: millimeters Top View Package Format : 24-pin QFN Package Size : 4 mm x 4 mm x 0.7 mm Pin Pitch : 0.5mm Bottom View F0539951Q 10.0 Gb/s Laser Diode Driver ♦ Typical Connection 1) Output Stage VDD VDD VDD L2 50Ω 50Ω MODB MOD DATA+ L1 T2 T1 R2 Laser Diode R1 L3 DATA- RBM BIAS VSS VSSB NOTE: L1, L2, L3 RF Choke Inductor R1, R2 5 to 20Ω Damping Resistor T1, T2 50Ω or 25Ω transmission lines RBM 3 to 5Ω Bias Monitor Resistor to APC F0539951Q 10.0 Gb/s Laser Diode Driver 2) Pulse Width control IC IC PWP PWP Pulse Width control 2kΩ OR PWN Pulse Width control 0 to 1kΩ PWN VSSB Open VSSB