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25G SFP28 850 nm 300m

Ascent’s SFP28 25Gb/s transceiver is an integrated fiber optic transceiver that provides a high-speed serial link at signaling rates up to 25.78 Gb/s. It is a single- channel, pluggable, fiber-optic module for short-range data communication and interconnect Ethernet applications. This module is designed to operate over multimode fiber systems using a nominal wavelength of 850nm. It has a transmission distance of up to 300 m on OM3 and 400 m on OM4 multi-mode fibers. The optical interface uses duplex LC receptacle. This module incorporates proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service. The SFP28-25LP-85-03 module has the rate adaption and its operating temperature is ranging from 0°C~70°C for commercial usage and -40°C ~85°C for industrial usage.

·         25Gbps serial optical interface

·         850nm VCSEL transmitter and GaAs PIN PD receiver

·         Rate Adaptation

·         Operating temperature

       Commercial (0°C~70°C)

       Industrial (-40°C~85°C)

·         Maximum link length of 300m via OM3 multimode Fiber (MMF)

·         Maximum link length of 400m via OM4 multimode Fiber (MMF)


Absolute Maximum Ratings

Parameter

Symbol

Min.

Typ.

Max.

Unit

Storage Temperature

Ts

-40

-

85

°C

Relative Humidity

RH

0


85

%

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Case Temperature

Tc

0

-

70

°C

1

-40

-

85

2

Power Supply Voltage

VCC

3.15

3.3

3.45

V


Bit Rate

BR


25.78125


Gbps


Note1, 2: See order information

Optical Characteristics

Parameter

Transmitter

Symbol

 

Min.

 

Typ.

 

Max.

 

Unit

Notes

 

Center Wavelength

λ

840


860

nm


RMS Spectral Width

Pm



0.6

nm


Average Optical Power

Pavg

-5


2.4

dBm


Optical Modulation Amplitude

OMA

-5


3

dBm


Average Launch Power of OFF Transmitter

Poff



0.6

nm


Extinction Ratio

ER

3



dB


Optical Return Loss Tolerance




12

dB


Receiver







Center Wavelength

λ

840

850

860

nm


Damage Threshold


3.4



dBm


Receive Power Overload


2.4



dBm


Receiver Reflectance




-12

dBm


Receiver Sensitivity

SENS



-5

dBm

1

Receiver Sensitivity

SENS



-10

dBm

2

LOS Assert

LOSA

-30



dBm


LOS De-assert

LOSD



-13

dBm


LOS Hysteresis

LOSH

0.5



dB


Note:

1.     Measured with a 25.78125G, PRBS-31 NRZ, ER>3.5dB, BER<1E-12.

2.       Measured with a 25.78125G, PRBS-31 NRZ, ER>3.5dB, BER<5E-5.

Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Power Consumption




1

W


Supply Current

Icc


100

300

mA


Digital Diagnostics

Parameter

Accuracy

Unit

Internally Measured Transceiver Temperature

+/-3

°C

Internally Measured Transceiver Supply Voltage

+/-3

%

Measured Tx bias Current

+/-10

%

Measured Tx Output Power

+/-3

dB

Measured Rx Received Average Optical Power

+/-3

dB


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