AFBR-1310Z / AFBR-1310xZ Fiber Optic Transmitter for Multi GHz Analog Links Data Sheet Description Features The AFBR-1310xZ is a compact, high performance, cost effective transmitter for multi GHz analog communication over single mode optical fiber. • Compact package The transmitter incorporates a linear wide bandwidth InGaAsAl/InP Fabry-Perot laser packaged inside a TOheader, coupled to a single mode fiber pigtail terminated with a standard FC/PC connector (or an SC/APC connector, or an LC/PC connector), a monitor photodiode for closed loop operation, a 50 ohm input impedance linear RF amplifier and a bias network that allows to separately control the laser average output power. The transmitter operates at a nominal wavelength of 1310 nm. Access to RF input, electrical control signals I/Os and amplifier supply is through a flexible printed circuit board. The RF input is self biased and AC coupled, and thus does not require an external DC block. A suitable bracket is used to mount the transmitter onto a PCB or metal substrate. The high output power and conversion gain allow for a high splitting ratio in branched Passive Optical Networks. • Uncooled operation in a wide temperature range • High performance 1310 nm Fabry-Perot laser • Built-in high performance RF amplifier • Floating Monitor Photodiode for flexibility in control loop design • Single mode fiber pigtailed output with standard FC/ PC connector (AFBR-1310Z) • SC/APC pigtail option available (AFBR-1310AZ) • LC/PC pigtail option available (AFBR-1310BZ) • Low power consumption • Flex interconnect to customer PCB • Minimal external circuitry required • RoHS6 compliant • Pairs to AFBR-2310Z Receiver for multi GHz analog links Specifications • Nominal 50 ohm RF input impedance • 5 mW typical output power at 50 mA laser current (room temperature) • 5 V RF amplifier supply voltage • 200 MHz to 5.5 GHz frequency range • 20 mW/V typical slope efficiency/conversion gain Applications • Analog optical links for satellite signal distribution • In-building antenna remote systems Table 1. Absolute Maximum Ratings [1] Parameter Symbol Minimum Storage Temperature (non-operating) Ts Operating Temperature Ta Relative Humidity (non condensing) RH RF amplifier supply voltage Typical Maximum Unit -40 85 C -40 85 C 85 % 5.5 V 0 RF amplifier input power Pin 20 dBm RF amplifier input DC voltage Vin 6 V Laser bias current (direct) Ibias 100 mA 2 V 15 V Monitor photodiode direct current 5 mA Flex soldering temperature 300 C 250 V Laser bias reverse voltage Monitor photodiode reverse voltage ESD capability (HBM) VR VESDHBM Notes For manual soldering, no longer than 2 sec/pad. It is advisable to pre-heat the customer PCB. Notes: 1. Absolute maximum ratings are those values beyond which functional performance is not intended, device reliability is not implied, and damage to the device may occur. Table 2. Recommended operating conditions [2] Parameter Symbol Minimum Typical Operating Temperature Ta -40 Relative Humidity (non condensing) RH RF amplifier supply voltage VCC 4.75 5 Monitor photodiode reverse voltage VR 2 5 Maximum Unit 85 C 80 % 5.25 V 10 V Notes Notes: 2. Typical operating conditions are those values for which functional performance and device reliability is implied. 2 Table 3. Electro-Optical specifications Parameter Symbol Conditions Min. Output Power Po 25° C, If = 60 mA 5 Laser threshold current Ith T = 25° C T = 85° C 15 30 Laser operating current Iop Po = 5 mW, T = 25° C T = 85° C 60 95 Laser wavelength λ Po = 5 mw, CW, T = 25° C Laser spectral width Δλ Po = 5 mw, CW, Over temperature Temperature coefficient of wavelength Δλ/ΔT Laser slope efficiency η Over temperature, CW Relative intensity noise RIN CW, 0.2 to 5.5 GHz, 5 mW LOP Monitor photo current Imon Po = 5 mW Over temperature CW Dark current Idark At Vr = 5 V Monitor photodiode capacitance Cmon Monitor tracking accuracy [3] TA RF Input impedance Zin Conversion gain G Bandwidth at -3dB BW 1290 0.08 Nom. Unit 1310 0.12 0.4 -1.0 mA mA 1330 nm 3 nm 0.6 nm/°C 0.2 W/A -120 dB/Hz 2.5 mA 0.1 μA 50 pF +1.0 dB 50 Ω T = 25° C 20 mW/V In electrical domain 5.5 GHz Gain ripple (peak to peak) 0.2 to 5.5 GHz +/- 3 dB Gain temperature dependence -40 to +85° C +/- 2 dB 50 MHz Low frequency cut-off Third order Input Intercept point IIP3 F = 5.4 GHz +8 dBm Second order Input Intercept point IIP2 Fo = 2.7 GHz, dual tone technique +15 dBm RF amplifier supply current Icc Vcc = 5 V 65 Notes: 3. Monitor Tracking Accuracy is defined as: max | 10Log(Po/Po@25° C) | 3 Notes mW 5 Po = 5 mW Over temperature CW Max. 88 mA rms Table 4. Pigtail parameters Parameter AFBR-1310Z AFBR-1310AZ AFBR-1310BZ Optical connector FC/PC SC/APC, 8° angle LC/PC Fibre type Single Mode Single Mode Single Mode Fibre length 0.5 ± 0.05 m 0.5 ± 0.05 m 0.5 ± 0.05 m Secondary coating diameter 0.9 mm 0.9 mm 0.9 mm Return loss of optical connector 35 dB minimum 45 dB minimum 35 dB minimum Schematic Diagram 1 Monitor Photodiode Cathode 2 Laser bias (Anode) 3 Ground 4 RFin RF Single mode fiber pigtail 5 Ground FabryPerot laser 6 RF amp power supply Optical connector (FC/PC or SC/APC or LC/PC) Monitor Photodiod 7 Monitor Photodiode Anode Figure 1. Schematic Diagram Table 5. Pinout 1 MPD cathode (floating) 2 Laser bias (anode) 3 Ground 4 RFin 5 Ground 6 RF amp [pwer supply 7 MPD anode (floating) PAD FUNCTION 1 Monitor Photodiode Cathode (floating) 2 Laser bias (anode) 3 Ground 4 RF in 5 Ground 6 RF amplifier supply 7 Monitor Photodiode Anode (floating) Figure 2. Electrical pinout (top view after 90° bending of the flexible PCB) Package Information The AFBR-1310xZ Transmitter is housed in a robust TO header. The amplifier portion is hosted on a flex/rigid printed circuit. The fiber pigtail jacket is made of Hytrel. The flex circuit can be soldered to the customer PCB by hand soldering or with automatic equipment (like hot bar). 4 Optical Connector Fiber length 500 ± 50 1.5 MAX 21.5 ± 2.5 2.3 1 6.8 12.7 17 2.9 1.2 2.3 Stiff part of flex board containing SMD components 0.8 16.8 5 7 6.9 8.5 4 5 R0. R0. 12.2 R3 R3.7 3.3 R0 .7 R0.5 R0. 2.3 1.2 2 1 Figure 3. Mechanical layout of Analog Transmitter. The flex is shown before 90° bending. All dimensions are in [mm] 5 R0.1 0.4 0.8 ≈ 3.2 PCB ≈ 3.6 ≈ 3.2 ≈ 6.9 Figure 4. Example of flex bending when soldered onto a PCB. All dimensions are in [mm] Handling information Laser safety When soldering the flex to the customer PCB, it is advisable to avoid heating or touching with the hot iron the fiber pigtail, the header to flex interconnections and the region of the flex where the amplifier and passive components are present. The AFBR-1310xZ is a class 1M product, according to the CEI IEC International Standard 60825-1, Second edition 2007-03. Invisible radiation is emitted from the fiber connector, do not view directly with optical instruments. This device is sensitive to ESD discharge. To protect the device, it’s important to use normal ESD handling precautions. These include use of grounded wrist straps, work-benches and floor wherever the device is handled. Mounting hardware An omega shaped bracket is pre-assembled to the TO header, for easy mounting of the transmitter to the customer PCB or better to a metal case. Recommended application circuit Figure 5 shows the recommended application circuit. Proper 50 ohm controlled impedance traces are required on the Laser bias, RF input and RF amplifier power supply connections. 50 ohm terminations, in parallel to bias inductors, are required on the Laser bias and RF amplifier power supply connections. Additionally, filtering caps are required on the bias lines. To laser control circuit From laser control circuit 15 nH 100 nF MPD Cathode 50 ohm 1 nF Laser bias (Anode) Ground RF In Ground RF amp Preceding amplifier stage RF amplifier supply 15 nH 50 ohm FabryPerot laser Monitor Photodiode MPD Anode Vcc = 5 V 100 nF 1 nF To laser control circuit Figure 5. Recommended Application Circuit For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright © 2005-2013 Avago Technologies. All rights reserved. AV02-3184EN - September 13, 2013