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SERCOS Fiber Optic Transmitters and Receiver Technical Data
HFBR-0600 Series
Features
* Fully Compliant to SERCOS Optical Specifications * Optimized for 1 mm Plastic Optical Fiber * Compatible with SMA Connectors * Auto-Insertable and Wave Solderable * Data Transmission at Symbol Rates from DC to over 2 MBd for Distances from 0 to over 20 Metres
Applications
* Industrial Control Data Links * Reduction of Lightning and Voltage Transient Susceptibility * Tempest-Secure Data Processing Equipment * Isolation in Test and Measurement Instruments * Robotics Communication
controlled machines. The SERCOS interface specification was written by a joint working group of the VDW (German Machine Tool Builders Association) and ZVEI (German Electrical and Electronic Manufacturer's Association) to allow data exchange between NC controls and drives via fiber optic rings, with isolation and noise immunity. The HFBR-0600 family of fiber optic transmitters and receivers comply to the SERCOS specifications for transmitter and receiver optical characteristics and connector style (SMA).
SERCOS high attenuation specifications. The HFBR-2602 receiver incorporates an integrated photo IC containing a photodetector and dc amplifier driving an opencollector Schottky output transistor. The HFBR-2602 is designed for direct interfacing to popular logic families. The absence of an internal pull-up resistor allows the open-collector output to be used with logic families such as CMOS requiring voltage excursions higher than VCC. The HFBR-2602 has a dynamic range of 15 dB.
Description
The HFBR-0600 components are capable of operation at symbol rates from DC to over 2 MBd and distances from 0 to over 20 metres. The HFBR-1602 and HFBR-1604 transmitters contain a 655-nm AlGaAs emitter capable of efficiently launching optical power into 1000 m plastic optical fiber. The optical output is specified at the end of 0.5 m of plastic optical fiber. The HFBR-1604 is a selected version of the HFBR-1602, with power specified to meet the
SERCOS
SERCOS is a SErial Realtime COmmunication System, a standard digital interface for communication between controls and drives for numerically
CAUTION: The small junction sizes inherent to the design of this component increase the component's susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD.
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HFBR-160X Transmitters
HFBR-2602 Receiver
HFBR-0600 SMA Series Mechanical Dimensions
PART NUMBER DATE CODE 1/4 - 36 UNS 2A THREAD
HFBR-X60X
12.7 (0.50)
YYWW
22.2 (0.87)
*Pins 1, 4, 5, and 8 are isolated from the internal circuitry, but electrically connected to one another. **Transmitter Pin 7 may be left unconnected if necessary.
In the receiver, both the opencollector "Data" output Pin 6 and VCC Pin 2 are referenced to "Common" Pin 3 and 7. It is essential that a bypass capacitor (0.1 F ceramic) be connected from Pin 2 (VCC) to Pin 3 (circuit common) of the receiver.
SMA is an industry standard fiber optic connector, available from many fiber optic connector suppliers. HFBR-4401 is a kit consisting of 100 nuts and 100 washers for panel mounting the HFBR-0600 components.
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HFBR-1602/1604 Transmitters
Absolute Maximum Ratings Parameter Storage Temperature Operating Temperature Lead Soldering Cycle Temp. Time Forward Input Current Peak Forward Input Current Average Reverse Input Voltage IFPK IFavg VBR Symbol TS TA Min. -55 -40 Max. 85 85 260 10 120 60 -5 Unit C C C s mA mA V Note 1 Note 1 Reference
Electrical/Optical Characteristics 0 to 55C, unless otherwise stated. Parameter Forward Voltage Forward Voltage Temp. Coefficient Reverse Input Voltage Peak Emission Wavelength Full Width Half Maximum Diode Capacitance Optical Power Temp. Coefficient Thermal Resistance Peak Optical Output Power of HFBR-1602 Peak Optical Output Power of HFBR-1604 Rise Time (10% to 90%) Fall Time (90% to 10%) Symbol VF VF/T VBR P FWHM CT PT/T JA PT1602 PT1604 tr tf -10.5 -7.5 -10.5 57 50 40 27 -5.0 640 Min. 1.5 Typ.[2] 1.9 -1.2 -18 655 20 30 -0.01 330 -5.5 -3.5 -5.5 675 30 Max. 2.2 Unit V mV/C V nm nm pF dBm/C C/W dBm dBm dBm ns ns ns ns I F = 35 mA IF = 60 mA IF = 35 mA IF = 60 mA IF = 35 mA IF = 60 mA IF = 35 mA 25C VF = 0 f = 1 MHz IF = 35 mA Notes 3, 4 Notes 5, 6, 11 Notes 5, 6, 11 Condition IF = 35 mA IF = 35 mA IR = 100 A Reference
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HFBR-2602 Receiver
Absolute Maximum Ratings Parameter Storage Temperature Operating Temperature Lead Soldering Cycle Temp. Time Supply Voltage Output Current Output Voltage Output Collector Power Dissipation Fan Out (TTL) VCC IO VO PO AVG N -0.5 -0.5 Symbol TS TA Min. -55 -40 Max. 85 85 260 10 7.0 25 18.0 40 5 Unit C C C s V mA V mW Note 8 Note 1 Note 1 Reference
Electrical/Optical Characteristics 0 to 55C; Fiber core diameter 1.0 mm, fiber N.A. 0.5, 4.75 V VCC 5.25 V Parameter High Level Output Current Low Level Output Voltage High Level Supply Current Low Level Supply Current Symbol IOH VOL ICCH ICCL Min. Typ.[2] 5 0.4 3.5 6.2 Max. 250 0.5 6.3 10 Unit A V mA mA Condition VOH = 18 V PR < -31.2 dBm IOL = 8 mA PR > -20.0 dBm VCC = 5.25 V PR < -31.2 dBm VCC = 5.25 V PR > -20.0 dBm Reference
Dynamic Characteristics 0 to 55C unless otherwise specified; 4.75 V VCC 5.25 V; BER 10-9 Parameter Peak Input Power Level Logic HIGH Peak Input Power Level Logic LOW Propagation Delay LOW to HIGH Propagation Delay HIGH to LOW Pulse Width Distortion, tPLH - t PHL Symbol PRH PRL tPLH tPHL PWD -20.0 60 110 50 -50 Min. Typ.[2] Max. -31.2 -5.0 Unit dBm dBm ns ns ns ns Condition P = 655 nm IOL = 8 mA PR = -20 dBm 2 MBd PR = -20 dBm 2 MBd PR = -5 dBm PR = -20 dBm Reference Note 7 Note 7 Note 8, 9 Note 8, 9 Note 10 Figure 6
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Notes: 1. 2.0 mm from where leads enter case. 2. Typical data at TA = +25C. 3. Thermal resistance is measured with the transmitter coupled to a connector assembly and fiber, and mounted on a printed circuit board. 4. Pins 2, 6, and 7 are welded to the cathode header connection to minimize the thermal resistance from junction to ambient. To further reduce the thermal resistance, the cathode trace should be made as large as is consistent with good RF circuit design. 5. PT is measured with a large area detector at the end of 0.5 metre of plastic optical fiber with 1 mm
6.
7.
8. 9.
diameter and numerical aperture of 0.5. When changing W to dBm, the optical power is referenced to 1 mW (1000 W). Optical Power P(dBm) = 10 log [P (W)/1000 W]. Measured at the end of 1mm plastic fiber optic cable with a large area detector. 8 mA load (5 x 1.6 mA), R L = 560 . Propagation delay through the system is the result of several sequentially occurring phenomena. Consequently it is a combination of data-rate-limiting effects and of transmission-time effects. Because of this, the data-rate limit of the system must be described
in terms of time differentials between delays imposed on falling and rising edges. As the cable length is increased, the propagation delays increase. Datarate, as limited by pulse width distortion, is not affected by increasing cable length if the optical power level at the receiver is maintained. 10. Pulse width distortion is the difference between the delay of the rising and falling edges. 11. Both HFBR-1602 and HFBR-1604 meet the SERCOS "low attenuation" specifications when operated at 35 mA; only HFBR-1604 meets the SERCOS "high attenuation" limits when operated at 60 mA.
Figure 1. Forward Voltage and Current Characteristics.
Figure 2. Typical Transmitter Output vs. Forward Current.
Figure 3. Transmitter Spectrum Normalized to the Peak at 25C.
Figure 4. Typical Propagation Delay through System with 0.5 Metre of Cable.
Figure 5. Typical HFBR-160X/2602 Link Pulsewidth Distortion vs. Optical Power.
Figure 6. System Propagation Delay Test Circuit and Waveform Timing Definitions.
www.semiconductor.agilent.com Data subject to change. Copyright (c) 1999 Agilent Technologies 5091-1462E (11/99)

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