AFBR-59SMI2Z

AFBR-59SMI2Z 250-MBd Compact 650-nm Transceiver for Data Communication over Polymer Optical Fiber (POF) Cables with SMI Connector Data Sheet Description The Avago Technologies AFBR-59SMI2Z transceiver provides system designers with the ability to support serial communication with baud rates of up to 250 MBd over 2.2-mm jacketed standard polymer optical fiber (POF) with 1-mm core diameter and NA 0.5. power. In absence of receiver optical input signal, the receiver is in low power sleep mode and the differential output signal is pulled to ground. The receiver wakes up, when a valid optical input signal is detected. Features The SMI optical interconnect with its push-pull positive latching, with safe-release mechanism, provides secure, safe and easy to mate and de-mate optical connection for miscellaneous industrial and medical applications.  The AFBR-59SMI2Z is Laser Class 1, lead-free and compliant with RoHS.       Transmitter  The transmitter consists of a 650-nm LED, which is controlled by a fully integrated driver IC. The LED driver operates at 3.3V. It receives Low Voltage Differential Signaling (LVDS) electrical input, and converts it into a modulated current driving the LED. LED and driver IC are packaged in an optical subassembly. The optimized lens system of the optical subassembly couples the emitted optical power very efficiently into 1-mm core POF cable.   Fast Ethernet communications over POF Data rates up to 250 MBd High EMI/EMC robustness SMI connector system Link lengths up to 50m POF 3.3V operation LVDS input and output data connections Analog monitoring output (RSSI) Operating temperature range from –40°C to +85°C. RoHS compliant Applications   Industrial and medical applications Fast Ethernet Package Receiver The receiver utilizes a fully integrated single chip solution, which provides excellent immunity to EMI and fast transient dV/dt rejection. The receiver directly converts light to a digital LVDS output signal and operates at 3.3-V nominal supply. The integrated receiver is packaged in an optical subassembly, which couples optical power efficiently from POF to the receiving PIN. The transceiver package contains the two optical subassemblies, which are mounted in the black housing for SMI optical connection. The inserts are packages inside a conductive plastic inner housing, which provides additional immunity against EMI/ EMC. The receiver features an analog monitor output of the incoming optical signal. The monitor output provides an analog voltage proportional to the average optical input Broadcom -1- AFBR-59SMI2Z Data Sheet Pin Description and Recommended PCB Footprint Pin Description and Recommended PCB Footprint The AFBR-59SMI2Z has ten active signal pins (including supply voltage and ground pins) and two EMI shield solder posts. The EMI shield solder posts are isolated from transceiver internal circuit and should be connected to equipment chassis ground or signal ground. Figure 1 shows the top view of the PCB footprint and pinout diagram. Pin Description Table 1 Pin Description Pin No. Name Symbol Pin No. Name Symbol 1 EMI Shield GND — 7 Rx DC Supply Voltage RVCC 2 Tx Data Input (Negative) TD– 8 Rx Ground RGND 3 Tx Data Input (Positive) TD+ 9 Rx Signal Strength Indicator RSSI 4 Tx Ground TGND 10 Rx Data Output (Negative) RD– RD+ 5 Tx DC Supply Voltage TVCC 11 Rx Data Output (Positive) 6 Tx Ground (optional) TGND 12 EMI Shield GND PCB Footprint Figure 1 PCB Footprint and Pinout Diagram (Top View) Notes: Dimensions: mm Recommended PCB thickness: 1.57 mm ± 0.08 mm Broadcom -2- — AFBR-59SMI2Z Data Sheet Regulatory Compliance Table Regulatory Compliance Table Table 2 Regulatory Compliance Table Feature Test Method Performance Electrostatic Discharge (ESD) to the Electrical Pins ESD22-A114 Withstands up to 2-kV HBM applied between the electrical pins. Immunity Variation of IEC 61000-4-3 Typically shows no measurable effect from a 15-V/m field swept from 8 MHz to 1 GHz applied to the transceiver when mounted on a circuit board without chassis enclosure. Component Recognition Underwriter Laboratories UL File #: E173874. Eye Safety EN 60825-1:52007 Laser Class 1 product (LED radiation only). TÜV certificate: R50217706. CAUTION Use of controls or adjustments of performance or procedures other than those specified herein might result in hazardous radiation exposure. Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause damage to the devices. Limits apply to each parameter in isolation. Absolute maximum ratings are those values beyond which damage to the device may occur if these limits are exceeded for other than a short period of time. Table 3 Absolute Maximum Ratings Parameter Symbol Min Max Unit Supply Voltage VCC –0.5 4.5 V Storage Temperature TSTG –40 +85 °C Lead Soldering Temperaturea TSOLD — 260 °C Lead Soldering Timea tSOLD — 10 s Electrostatic Discharge Voltage Capabilityb ESD — 2 kV a. The transceiver is Pb-free wave solderable. According to JEDEC J-STD-020D, the moisture sensitivity classification is MSL2a. b. ESD capability for all pins HBM (human body model) according to JESD22-A114B. Recommended Operating Conditions Table 4 Recommended Operating Conditions Parameter Symbol Min Typ Max Unit Operating Temperature TA –40 — +85 °C DC Supply Voltage VCC 3.0 3.3 3.6 V Baud Ratea BR 10 — 250 MBd a. Data rate of 250 Mb/s with 8b/10b coding. NOTE All of the data in this specification refer to the operating conditions above and over lifetime unless otherwise stated. Broadcom -3- AFBR-59SMI2Z Data Sheet Transmitter Electrical Characteristics Transmitter Electrical Characteristics TA = –40°C to + 85°C unless otherwise specified; 3.0V ≤ VCC ≤ 3.6V. Table 5 Transmitter Electrical Characteristics Parameter Symbol Min Typ Max Unit Current Consumption ICC — 29 40 mA External Input termination Impedance ZIN — 100 —  LVDS Input Voltage to Circuit Common VIN 0.8 — 2.2 V VIN-DIFF 200 — 1200 mV LVDS Differential Input Voltage Transmitter Optical Characteristics TA = –40°C to + 85°C unless otherwise specified; 3.0V ≤ VCC ≤ 3.6V. Table 6 Transmitter Optical Characteristics Parameter Symbol Min Typ Max Unit Central Wavelengtha C 635 650 675 nm Spectral Bandwidth (RMS) W — — 17 nm Average Output Powera, b PO –8.5 — –2.0 dBm Optical Rise Time (20% to 80%)a tR — 1.2 3.0 ns Optical Fall Time (80% to 20%)a tF — 1.2 3.0 ns Extinction Ratioa ER 10 12 — dB DCD — — 1.0 ns JR — — 0.7 ns JDD — — 0.8 ns Duty Cycle Distortiona Random Jittera, c Data Dependent Jittera a. Measured at the end of 1m plastic optical fiber (POF) with PRBS 27–1 sequence. b. Minimum average output power specification value includes 1-dB degradation margin. c. Peak-to-peak measurement, based on BER = 2.5 x 10-10. Broadcom -4- AFBR-59SMI2Z Data Sheet Receiver Electrical Characteristics Receiver Electrical Characteristics TA = –40°C to + 85°C unless otherwise specified; 3.0V ≤ VCC ≤ 3.6V. Table 7 Receiver Electrical Characteristics Parameter Symbol Min Typ Max Unit Current Consumption ICC — 23 30 mA LVDS Output Common Voltage VCM — 1.2 — V VO-DIFF 500 — 800 mV Output Rise Time (10% to 90%)a tR — 1.1 3.0 ns Output Fall Time (90% to 10%)a tF — 1.1 3.0 ns DCD — — 1.0 ns JR — — 1.0 ns JDD — — 0.8 ns Output Ratio for RSSI Pind IRSSI/P — 0.65 — A/W RSSI Output Voltage Range VRSSI 0 — VCC – 1.5 V Wake Up Time after Sleep State TWU — — 1.0 ms LVDS Output Differential Voltage Swinga Duty Cycle Distortiona Random Jittera, b, c Data Dependent Jittera a. Differential output signal is measured with reference transmitter source, 0.5m POF cable, and PRBS 27–1 sequence. b. Peak to peak measurement, based on BER = 2.5 x 10-10. c. Maximum random jitter at –15 dBm average optical input power is 0.4 ns. d. The RSSI current output has been verified with an external resistor RRSSI = 2 kΩ. Receiver Optical Characteristics TA = –40°C to + 85°C unless otherwise specified; 3.0V ≤ VCC ≤ 3.6V. Table 8 Receiver Optical Characteristics Parameter Symbol Min Typ Max Unit C 635 650 675 nm Minimum Receiver Input Powera PIN-MIN –21 — — dBm Maximum Receiver Input Powera PIN-MAX — — –2.0 dBm Central Wavelengtha a. Average optical power, measured with a PRBS 27–1 sequence, BER = 2.5 x 10-10. Broadcom -5- AFBR-59SMI2Z Data Sheet Analog Monitoring Voltage (RSSI) Analog Monitoring Voltage (RSSI) The Receiver Signal Strength Indicator (RSSI) is a monitoring output that delivers an output current proportional to the average incoming light. The typical variation of the analog monitoring voltage (across 2K shunt resistor) as a function of receiver optical input power for industrial temperature range is shown in Figure 2. The monitoring voltage varies linearly with the receiver optical input power. The variation over temperature is negligible for most applications. For an almost noise-free RSSI-signal, smoothing components are recommended. A capacitor in parallel to the resistor on the RSSI output reduces potential high frequency signal parts. The use of a single 100-nF capacitor for signal smoothing is sufficient in most common applications, as shown in the recommended receiver circuitry in Figure 3. To provide a suitable monitoring voltage across the shunt resistor, RRSSI, its value should be chosen to the particular optical power situation of the specific application. The lower the optical receiver power, the higher the resistor value should be. Do not, however, override the max limit of VRSSI. Figure 2 Typical RSSI Output Voltage across RRSSI = 2 kΩ vs. Optical Input Power Board Layout - Decoupling Circuit and Ground Planes To achieve optimum performance from the AFBR-59SMI2Z transceiver module, it is important to take note of the following recommendations: A power supply decoupling circuit should be used to filter out noise and ensure optical product performance. A contiguous signal ground plane should be provided directly beneath the transceiver module for low inductance ground to signal return current. The shield posts should be connected to chassis ground or signal ground to provide optimum EMI and ESD performance.    These recommendations are in keeping with good high frequency board layout practices. However, the optimum grounding strategy depends on the overall system architecture. Figure 3 shows the minimum external circuitry between AFBR-59SMI2Z transceiver module and PHY chip. AC-coupling is possible if the common mode voltage and voltage swing at the data lines are within the recommended values. Use the product information of the actual PHY Chip for connecting to the AFBR-59SMI2Z transceiver module. 550 Figure 3 General Application Circuit for LVDS Configuration 500 450 AFBR-59SMI2Z 50 RD+ RD- 100 300 50 RD - MON 250 GND MON 200 Vdd 150 100nF T = -40°C T = +25°C T = +85°C 100 50 2K 10μF 100nF 10nF Ferrite GND 3V3 GND 10μF 10nF 0 Vdd GND 0 50 Amplifier + Quantizer RD + 350 100 150 200 250 300 350 400 450 500 550 Optical Power (μW) TD+ 50 TD+ 100 TD- General LVDS Application Circuit LED Driver Mon. Voltage (mV) 400 TD- 50 Chassis GND The recommended application circuit is shown in Figure 3. Broadcom -6- AFBR-59SMI2Z Data Sheet Mechanical Data – Package Outline Mechanical Data – Package Outline Figure 4 Package Outline Drawing Notes: Dimensions: mm. Recommended PCB thickness: 1.57 mm ± 0.08 mm. Design related is a small gap between plastic part and dust plug possible. Function is nevertheless given. Broadcom -7- For product information and a complete list of distributors, please go to our web site: www.broadcom.com. Broadcom, the pulse logo, Connecting everything, Avago Technologies, Avago, and the A logo are among the trademarks of Broadcom and/or its affiliates in the United States, certain other countries and/or the EU. Copyright © 2016 by Broadcom. All Rights Reserved. The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries. For more information, please visit www.broadcom.com. Broadcom reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. Information furnished by Broadcom is believed to be accurate and reliable. However, Broadcom does not assume any liability arising out of the application or use of this information, nor the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. pub-005856 – November 7, 2016