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 suscepti- bility ? tempest-secure data processing equipment ? isolation in test and measurement instruments ? robotics communication sercos sercos is a serial realtime communication system, a standard digital interface for communication between controls and drives for numerically 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 manufacturers 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). 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 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 high attenuation specifications. the hfbr-2602 receiver incor- porates an integrated photo ic containing a photodetector and dc amplifier driving an open- collector 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 v cc . the hfbr-2602 has a dynamic range of 15 db. 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.
2 in the receiver, both the open- collector data output pin 6 and v cc pin 2 are referenced to common pin 3 and 7. it is essential that a bypass capacitor (0.1 m f ceramic) be connected from pin 2 (v cc ) to pin 3 (circuit common) of the receiver. *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. hfbr-0600 sma series mechanical dimensions hfbr-2602 receiver hfbr-160x transmitters 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. 22.2
(0.87) 12.7
(0.50) 1/4 - 36 uns 2a
thread yyww
hfbr-x60x part number date code
3 hfbr-1602/1604 transmitters absolute maximum ratings parameter symbol min. max. unit reference storage temperature t s -55 85 c operating temperature t a -40 85 c lead soldering cycle temp. 260 c note 1 time 10 s note 1 forward input current peak i fpk 120 ma forward input current average i favg 60 ma reverse input voltage v br -5 v electrical/optical characteristics 0 to 55 c, unless otherwise stated. parameter symbol min. typ. [2] max. unit condition reference forward voltage v f 1.5 1.9 2.2 v i f = 35 ma forward voltage d v f / d t -1.2 mv/ ci f = 35 ma temp. coefficient reverse input voltage v br -5.0 -18 v i r = 100 m a peak emission l p 640 655 675 nm wavelength full width half fwhm 20 30 nm 25 c maximum diode capacitance c t 30 pf v f = 0 f = 1 mhz optical power temp. d p t / d t -0.01 dbm/ ci f = 35 ma coefficient thermal resistance q ja 330 c/w notes 3, 4 peak optical output p t1602 -10.5 -5.5 dbm i f = 35 ma notes 5, 6, power of hfbr-1602 11 peak optical output p t1604 -7.5 -3.5 dbm i f = 60 ma notes 5, 6, power of hfbr-1604 -10.5 -5.5 dbm i f = 35 ma 11 rise time (10% to 90%) t r 57 ns i f = 60 ma 50 ns i f = 35 ma fall time (90% to 10%) t f 40 ns i f = 60 ma 27 ns i f = 35 ma
4 hfbr-2602 receiver absolute maximum ratings parameter symbol min. max. unit reference storage temperature t s -55 85 c operating temperature t a -40 85 c lead soldering cycle temp. 260 c note 1 time 10 s note 1 supply voltage v cc -0.5 7.0 v output current i o 25 ma output voltage v o -0.5 18.0 v output collector power dissipation p o avg 40 mw fan out (ttl) n 5 note 8 electrical/optical characteristics 0 to 55 c; fiber core diameter 1.0 mm, fiber n.a. 0.5, 4.75 v v cc 5.25 v parameter symbol min. typ. [2] max. unit condition reference high level output i oh 5 250 m av oh = 18 v current p r < -31.2 dbm low level output v ol 0.4 0.5 v i ol = 8 ma voltage p r > -20.0 dbm high level supply i cch 3.5 6.3 ma v cc = 5.25 v current p r < -31.2 dbm low level supply i ccl 6.2 10 ma v cc = 5.25 v current p r > -20.0 dbm dynamic characteristics 0 to 55 c unless otherwise specified; 4.75 v v cc 5.25 v; ber 10 -9 parameter symbol min. typ. [2] max. unit condition reference peak input power p rh -31.2 dbm l p = 655 nm note 7 level logic high peak input power p rl -20.0 -5.0 dbm i ol = 8 ma note 7 level logic low propagation delay t plh 60 ns p r = -20 dbm note 8, 9 low to high 2 mbd propagation delay t phl 110 ns p r = -20 dbm note 8, 9 high to low 2 mbd pulse width pwd 50 ns p r = -5 dbm note 10 distortion, figure 6 t plh - t phl -50 ns p r = -20 dbm
5 notes: 1. 2.0 mm from where leads enter case. 2. typical data at t a = +25 c. 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. p t is measured with a large area detector at the end of 0.5 metre of plastic optical fiber with 1 mm diameter and numerical aperture of 0.5. 6. when changing m w to dbm, the optical power is referenced to 1 mw (1000 m w). optical power p(dbm) = 10 log [p ( m w)/1000 m w]. 7. measured at the end of 1mm plastic fiber optic cable with a large area detector. 8. 8 ma load (5 x 1.6 ma), r l = 560 w . 9. 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. data- rate, as limited by pulse width distor- tion, 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 25 c. 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 ? 1999 agilent technologies 5091-1462e (11/99)
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