Ascent Communication Technology

10/25G SFP28 850 nm 300m

Ascent’s SFP28 10G/25G 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 SFP28-1025-85-03 module has the rate adaption and its operating temperature is ranging from 0°C to 70°C for commercial usage and -40°C to 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	T_s	-40	-	85	°C
Relative Humidity	RH	0		85	%

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Case Temperature	T_c	0	-	70	°C	1
Case Temperature	T_c	-40	-	85	°C	2
Power Supply Voltage	V_CC	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	LOS_A	-30			dBm
LOS De-assert	LOS_D			-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