F0539951Q

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