2.5Gbps APD-TIA module

Featrues

High sensitivity APD
High performance -34 dBm Sensitivity
Wide dynamic range, typically 0.4µW to 0.3mW(p-p)
Differential transimpedance of 3.5
Bandwidth from DC to 2.1 GHz
Differential outputs
On-chip Automatic Gain Control (AGC)
Low Power Consumptio of 3.3V supply voltage
Wide data rate range from 155Mbps to 2.5Gbps(low frequency cut off at 3kHz)

Applications

Digital fiber optic receiver in short, medium and long haul optical telecommunications transmission systems or in high speed data networks
SONET/SDH-based transmission systems, test equipment and modules
Gigabit Ethernet and Fiber Channel
Wide-band RF gain block

Electrical Characteristics (Tc=25°C)

Parameter	Symbol	Test Condition	Min.	Typ.	Max.	Unit.
Power supply voltage for TIA	Vcc	-	3.0	3.3	3.6	V
Power supply current	Icc			44	59	mA
APD breakdown voltage	V_BR	I_D=100µA	35		60	V
Temperature Coefficient of V_BR	ϒ	ϒ=dV_BR/dTc		0.1
Transimpedance	Z_T	RL=50 measured differenctially, AC coupled	2.5	3.5	4.5
3dB Bandwidth	f_3dB	Pin=30dB	1.7	2.1	2.6	GHz
Low frequency cut-off	f_IC			3		kHz
Transimpedence gain deviation	Zr	f=1MHz to 1.8GHz			2	dB
Electrical return loss	L_E	-	-10		-7	dB
Responsivity	R	M=1.0, 1550nm	0.70			AW
Output impedence	Z₀			50

Optical Characteristics(Tc=25°C)

Parameter	Symbol	Test Condition	Min.	Typ.	Max.	Unit.
Optical wavelength range		-	1100		1600	nm
Sensitivity	Ps	RL=50, 2.5Gbps NRZ PRBS=2²³-1, BER=1 x 10^-10		-34		dBm
Maximum overload	Pmax		-5			dBm
Optical return loss	Lo	λ=1550nm			-30	dB

Absolute Maximum Ratings(Tc=25°C)

Parameter	Symbol	Rating	Unit
Supply voltage	Vcc	+5.0	V
Photodiode bias voltage	V_APD	V_BR	V
Operating case temperature range	Tc	-40 to +85	°C
Storage temperature range	T_STG	-40 to +85	°C

Application Diagram

Precautions for Use

ESD protection is imperative. Use of ground straps, anti static mats, and other standard ESD protective equipment is recommended when handling or testing an InGaAs PIN/APD or any other junction photodiode. Soldering temperature of the leads should not exceed 260°C for more than 10 seconds. Fiber pigtails should be handled with less than 10N pull and with a bending radius greater than 1 inch.

Ordering Information

Model name				Option
PD type	Bit-rate	Package type	Code	pinning	Fiber*	Connector type	Flange
XAD : APD	0400:10G	B:Butterfly	001 002 003	S:SMF M:MMF P:PMF	C1 D1	NC:No connector SP:SC/UPC FP:FC/UPC SA:SC/APC FA:FC/APC	N:No flange F:Flange B:Bracket

*Standard fiber length : 1meter
ex) XAD0250CT-003-C1SFPN
2.5Gbps APD-TIA receiver module with C1 pin-layout, single mode fiber-pigtailed FC/UPC connector

Revision history

Date	Revision	Description
June 2003	001	Initial release