Alpha Bridge AQSFP28-100G-FR1

Features

  • QSFP28 MSA compliant
  • Support 125Gbaud
  • 100G Lambda MSA 100G-FR Specification compliant
  • Up to 2km transmission on single mode fiber (SMF) with FEC
  • Operating case temperature: 0 to 70oC
  • 4x25G electrical interface (OIF CEI-28G-VSR)
  • Maximum power consumption 5W
  • LC duplex connector
  • RoHS compliant

Application

  • Data Center Interconnect
  • 100G Ethernet
  • Enterprise networking

Description

This product is a transceiver module designed for 2km optical communication applications. The module incorporates one channel optical signal, on 1310nm center wavelength, operating at 50Gbaud data rate. The transmitter path incorporates an EML Driver and a cooled EML together. On the receiver path, the inpirt optical signal is coupled to a Pin photodiode detector. A DSP based gearbox is used to convert 4x25Gbps NRZ signals to 1x50Gbaud PAM4 signal. Also a 4-channel retimer and FEC block are integrated in this DSP. The electrical interface is compliant with IEEE 802.3cd and QSFP28 MSA in the transmitting and receiving directions, and optical interface is compliant to IEEE 802.3cd and 100G Lambda MSA with Duplex LC connector The module has a maximum power consumption of 4.5W.

The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference.

Absolute Maximum Ratings

Parameter Symbol Min. Max. Units Note
Storage Temperature Ts -40 85 ℃  
Operating Case Temperature TOP 0 70 ℃  
Supply Voltage VCC -0.5 3.6 V  
Relative Humidity (non-condensation) RH 0 85 %  
Damage Threshold, each Lane THd 5.5   dBm  

Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Units Notes
Operating Case Temperature TOP 0   70 ℃  
Power Supply Voltage Vcc 3.135 3.3 3.465 V  
Data Rate, each Lane     25.78125   Gb/s  
Optical Data Rate (PAM4)     53.125   GBd  
Data Rate Accuracy   -100   100 ppm  
Pre-FEC Bit Error Ratio       2.4x10-4    
Post-FEC Bit Error Ratio       1x10-12   1
Control Input Voltage High   2   Vcc V  
Control Input Voltage Low   0   0.8 V  
Link Distance with G.652 D 0.002   2 km 2

Diagnostics Monitoring

Parameter Symbol Accuracy Unit Notes
Temperature monitor absolute error DMI_Temp ± 3 °C Over operating temperature range
Supply voltage monitor absolute error DMI_VCC ± 0.1 V Over full operating range
Channel RX power monitor absolute error DMI_RX_Ch ± 2 dB 1
Channel Bias's current monitor DMI_Ibias_Ch ± 10% mA  
Channel TX power monitor absolute error DMI_TX_Ch ± 2 dB 1

Transmitter Electro-optical Characteristics (Each Lane)

Parameter Test Point Min Typ. Max Units Notes
Power Consumption       4.5 W  
Supply Current Icc     1.36 A  
Overload Differential Voltage pk-Pk TP1a 900     mV  
Common Mode Voltage (Vcm) TP1 -350   2850 mV 1
Differential Termination Resistance Mismatch TP1     10 % At 1MHz
Differential Return Loss (SDD11) TP1  See CEI- 28G-VSR Equation 13- dB
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC11, SCD11) TP1 See CEI-28G-VSR Equation 13-20 dB
Center Wavelength Λt 1304.5   1317.5 nm  
Side Mode Suppression Ratio SMSR 30     dB  
Launch Power, each Lane PAVG -2.4   4 dBm 1
Outer Optical Modulation POMA -0.2   4.2 dBm 2
Amplitude (OMAouter)            
Launch Power in OMA minus TDECQ   -     dBm  
For ER ≧4.5dB   -1.6        
For ER < 4.5dB   -1.5        
Transmitter and Dispersion Eye Cloure for PAM4 (TDECQ) TDECQ     3.4 dB  
TDECQ-10*log10 (Ceq)       3.4 dB 3
Extinction Ratio ER 3.5     dB  
RIN17.1 OMA RIN     -136 dB/Hz  
Optical Return Loss Tolerance TOL     17.1 dB  
Transmitter Reflectance RT     -26 dB  
Transmitter Transition Time       17 ps  
Average Launch Power OFF Transmitter, each Lane Poff     -15 dBm  

Receiver Electro-Optical Characteristics (each Lane)

Parameter Test Point Min Typ. Max Units Notes  
Differential Voltage, pk-pk TP4     900 mV    
Common Mode Voltage (Vcm) TP4 -350   2850 mV 1  
Common Mode Noise, RMS TP4     17.5 mV    
Differential Termination Resistance Mismatch TP4     10 % At 1MHZ  
Differential Return Loss (SDD22) TP4 See CEI-28G-VSR Equation 13-19 dB
Common Mode to Differential Conversion and Differential to   See CEI-28G-VSR Equation 13-21  
Common Mode Conversion (SDC22, SCD22) TP4       dB    
Transition Time, 20% to 80% TP4 9.5     ps    
Common Mode Return Loss (SCC22) TP4     -2 dB 2  
Vertical Eye Closure (VEC) TP4     5.5 dB    
Eye Width at 10-15 probability (EW15) TP4 0.57     UI    
Eye Height at 10-15 probability (EH15) TP4 228     mV    
Center Wavelength Λr 1304.5   1317.5 nm    
Damage Threshold THd 5.5     dBm 4  
Average Receive Power   -6.4   4.5 dBm 5  
Receive Power (OMAouter)       4.7 dBm    
Receiver Sensitivity (OMAouter) SEN     -8.6 dBm 6  
Stressed Receiver Sensitivity (OMAouter) SRS     -2.5 dBm 7  
Receiver Reflectance RR     -26 dB    
LOS Assert LOSA 15     dBm    
LOS Deassert LOSD     -11 dBm    
LOS Hysteresis LOSH 0.5     dB    
Conditions of Stress Receiver Sensitivity Test (Note 8)
Stressed Eye Clousre for PAM4 (SECQ)       3.4 dB    
SECQ-10*log10(Ceq)       3.4 dB    

Pin Description

PIN Logic Symbol Name/Description Note
1   GND Ground 1
2 CML-I Tx2n Transmitter Inverted Data Input  
3 CML-I Tx2p Transmitter Non-Inverted Data output  
4   GND Ground 1
5 CML-I Tx4n Transmitter inverted Data Input  
6 CML-I Tx4p Transmitter Non-Inverted Data output  
7   GND Ground 1
8 LVTLL-I ModSeIL Module Select  
9 LVTLL-I ResetL Module Reset  
10   VccRx +3.3V Power Supply Receiver 2
11 LVCMOS-I/O SCL 2-Wire Serial Interface Clock  
12 LVCMOS-I/O SDA 2-Wire Serial Interface Data  
13   GND Ground  
14 CML-O Rx3p Receiver Non-Inverted Data output  
15 CML-O Rx3n Receiver Inverted Data output  
16   GND Ground 1
17 CML-O Rx1p Receiver Non-Inverted Data Output  
18 CML-O Rx1n Receiver Inverted Data Output  
19   GND Ground 1
20   GND Ground 1
21 CML-O Rx2n Receiver Inverted Data output  
22 CML-O Rx2p Receiver Non-Inverted Data output  
23   GND Ground 1
24 CML-O Rx4n Receiver Inverted Data output 1
25 CML-O Rx4p Receiver Non-Inverted Data output  
26   GND Ground 1
27 LVTTL-O ModPrsL Module Present  
28 LVTTL-O IntL Interrupt  
29   VccTx +3.3V Power Supply transmitter 2
30   Vcc1 +3.3V Power Supply 2
31 LVTTL-I LPMode Low Power Mode  
32   GND Ground 1
33 CML-I Tx3p Transmitter Non-Inverted Data Input  
34 CML-I Tx3n Transmitter Inverted Data Output  
35   GND Ground 1
36 CML-I Tx1p Transmitter Non-Inverted Data Input  
37 CML-I Tx1n Transmitter Inverted Data Output  
38   GND Ground 1

Ordering Information

Model Number Part Number Voltage Temperature
QSFP28-100G-FR1 AQSFP28-100G-FR1 3.3V 0°C to 70 °C
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