Agilent HFBR-1506AM/HFBR-2506AM
Fiber Optic SMA Transmitters and
Receivers for 16 MBd SERCOS
Applications
Data Sheet
Description
SERCOS, an acronym for SErial
Realtime COmmunications
Systems, is a standard digital
interface for communication in
industrial CNC applications.
SERCOS is a European (EN
61491) and international
standard (IEC 61491). The
optical interface allows data
rates of 2,4,8 and 16 MBd and
data transfer between numerical
controls and drives via fiber-
optic rings, with voltage
isolation and noise immunity.
The HFBR-1506AM and HFBR-
2506AM products have a
guaranteed performance up to
16 MBd.
Package Information
The transmitters and receivers
are housed in a low-cost, dual-
in-line package that is made of
high strength, heat resistant,
chemically resistant and UL 94V-
O (UL file # E121562) flame
retardant plastic. Both the
transmitter and receiver are
coated with a layer of
conductive alloy for better air
discharge (ESD) performance.
The package is designed for auto
insertion and wave soldering so
it is ideal for high volume
production applications.
Features
• Meets Industrial SERCOS 16MBd
standard
• SMA ports
• 650 nm wavelength
• Metal coated, plastic packaging
• Specified for use with 1 mm POF
and 200 µm HCS
• DC - 16 MBd data rate
Applications
• Industrial Control Data Links
• Factory Automation Data Links
• Voltage Isolation Applications
Handling and Design Information
When soldering, it is advisable
to leave the protective cap on
the unit to keep the optics clean.
Good system performance
requires clean port optics and
cable ferrules to avoid
obstructing the optical path.
Clean compressed air often is
sufficient to remove particles of
dirt; methanol on a cotton swab
also works well.
Recommended Chemicals for
Cleaning/Degreasing
Alcohols: methyl, isopropyl,
isobutyl.
Aliphatics: hexane, heptane.
Other: soap solution, naphtha.
Do not use partially halogenated
hydrocarbons such as 1,1,1
trichloroethane, ketones such as
MEK, acetone, chloroform, ethyl
acetate, methylene dichloride,
phenol, methylene chloride or N-
methylpyrolldone. Also, Agilent
does not recommend the use of
cleaners that use halogenated
hydrocarbons because of their
potential environmental harm.
2
Table 1. Link Performance Specification
0 °C to +70 °C unless otherwise noted.
Notes:
1. 60 mA nominal drive current.
2. POF HFBR-Exxyyy 0.23 dB/m worst case attenuation.
3. HCS 10 dB/km worst case attenuation.
4. Including a 3 dB optical safety margin accounting for link service lifetime.
5. Including a 2 dB optical safety margin accounting for link service lifetime.
6. Signaling rate dc to 16 MBd.
Parameter Symbol Min Max Unit Condition Reference
Link distance with
HFBR-1506AM/2506AM
I0.1
0.1
45
200
m
m
POF
HCS
Note 1, 2, 4, 6
Note 1, 3, 5, 6
CAUTION: The small junction size inherent in the design of these components increases the components’ susceptibility to damage from
electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent
damage and/or degradation which may be induced by ESD.
3
Absolute Maximum Ratings
Notes:
1. For I F_PK > 60 mA, the duty factor must maintain I F_AVG <= 60 mA and pulse width <= 1 µs.
2. 1.6 mm below seating plane.
Electrical Characteristics Table
0 °C to +70 °C unless otherwise noted.
Notes:
1. Typical data are at +25 °C
2. Thermal resistance is measured with the transmitter coupled to a connector assembly and fiber, and mounted on a printed circuit board.
3. To further reduce the thermal resistance, the cathode trace should be made as large as is consistent with good RF circuit design.
4. Pins 1 and 4 are for mounting and retaining purposes, but are electrically connected, pins 5 and 6 are electrically isolated. It is recommended that
pins 1, 4, 5 and 6 all be connected to ground to reduce coupling of elecrical noise.
HFBR-1506AM Transmitter
The HFBR-1506AM transmitter
incoporates a 650nm LED in a
metal-coated, plastic housing.
The high light output power
enables the use of both plastic
optical fiber (POF) and Hard
Clad Silica (HCS). This
transmitter can operate up to
16MBd using a simple driver
circuit. The HFBR-1506AM is
compatible with SMA
connectors.
Figure 1.
Parameter Symbol Min Max Unit Notes
Storage and Operating Temperature TS, O-40 +85 °C
Peak Forward Input Current IF, PK 90 mA 1
Average Forward Input Current IF, AVG 60 mA
Reverse Input Voltage VR3V
Lead Soldering Cycle
Te m p
Time
TSOL
TSOL
260
10
°C
s
2
Parameter Symbol Min Typ1Max Unit Condition Notes
Optical Power Temperature Coefficient DPT/DT-0.02 dB/°C
Forward Voltage VF1.8 2.1 2.65 V IF, dc = 60 mA See Figure 2
Forward Voltage Temperature Coefficient DVF/DT-1.8 mV/°C See Figure 2
Breakdown Voltage VBR 3.0 13 V IF, dc = -10 µA
Peak Emission Wavelength lPK 640 650 660 nm See Figure 4
Full Width Half Max FWHM 21 30 nm See Figure 4
Diode Capacitance CO60 pF VF = 0 V, f = 1 MHz
Thermal Resistance qJC 140 °C/W Notes 2, 3
Rise Time (10% to 90%) tr15 ns 10% to 90%
IF = 60 mA
See Figure 6
Fall Time (90% to 10%) tf15 ns See Figure 6
PIN FUNCTION
1
4
5
6
7
8
CONNECTED TO PIN 4
CONNECTED TO PIN 1
GND
GND
CATHODE
ANODE
5
6
7
8
4
1
BOTTOM VIEW,
HFBR-1506AM
SEE NOTE 4
4
2.5
1 10 100
I
F,DO
– TRANSMITTER DRIVE CURRENT – mA
V
F
– FORWARD VOLTAGE – V
2.3
2.1
1.9
1.7
1.5
-40 ˚C
0 ˚C
25 ˚C
70 ˚C
85 ˚C
10
1 10 100
I
F,DO
– TRANSMITTER DRIVE CURRENT – mA
P
T
– NORMALIZED OUTPUT POWER – dB
0
-10
-20
-30
-40
-40 ˚C
25 ˚C
85 ˚C
1.4
610 650 690
WAVELENGTH – nm
NORMALIZED SPECTRAL OUTPUT POWER
1.2
0.8
0.4
0.2
0
-40 ˚C
0 ˚C
630 670
0.6
1.0
25 ˚C
70 ˚C
85 ˚C
Peak Output Power
0 °C to +70 °C unless otherwise noted.
Notes:
1. Optical power measured at the end of 1 meters of 1 mm diameter plastic or 200 µm hard/plastic clad silica optical fiber with a large area detector.
Model Number Symbol Min Max Unit Condition Reference
HFBR-1506AM Pr -6.0
-18.0
-2.0
-10.0
dBm POF, IF, dc = 60 mA
HCS®, IF, dc = 60 mA
Note 1
Figure 3
Figure 2. Typical Forward Voltage vs Drive
Current
Figure 3. Typical Normalized Optical Power
vs Drive Current
Figure 4. Typical Normalized Optical Spectra
+5V Vcc
HFBR-1506AM HFBR-2506AM
R11
C5
R1 100
R2 no t used
R8 not used
R7 500
C1 100pF
C2 not used
R 6 not u sed R10 150
R3 100
R4 100
R5 100 R 9 100
C3 100pF
C4 56pF
Figure 5. Recommended drive circuit according to SERCOS An17 (Ifnom ~ 35 mA)
5
HFBR-2506AM Receiver
The HFBR-2506AM receiver is
housed in a metal-coated, plastic
package, consists of a silicon
PIN photodiode and digitizing IC
to produce a logic compatible
output. The IC includes a unique
circuit to correct the pulse width
distortion of the first bit after a
long idle period. This enables
operation from DC to 16MBd
with low PWD for arbitrary data
patterns.
Figure 6.
Absolute Maximum Ratings
Notes:
1. 1.6 mm below seating plane.
Electrical Characteristics Table
0 °C to +70 °C, 4.75 V < VCC < 5.25 V, VP-P Noise < = 100 mV unless otherwise noted.
Notes:
1. Typical data are at +25 °C, VCC = 5.0 V
2. BER <= 10E-9, includes a 10.8 dB margin below the receiver switching threshold level (signal to noise ratio =12)
3. Pins 1 and 4 are for mounting and retaining purposes, but are electrically connected, pins 5 and 6 are electrically isolated. It is recommended that
pins 1, 4, 5 and 6 all be connected to ground to reduce coupling of elecrical noise
Parameter Symbol Min Max Unit Notes
Storage and Operating Temperature TS, O-40 +85 °C
Supply Voltage VCC -0.5 5.5 V
Average Output Current IO, AVG 16 mA
Output Power Dissipation POD 80 mW
Lead Soldering Cycle
Te m p
Time
TSOL
TSOL
260
10
°C
s
1
The receiver is a "push-pull"
stage compatible with TTL and
CMOS logic. The HFBR-2506AM
is compatible with SMA
connectors.
Parameter Symbol Min Typ1Max Unit Condition Notes
Peak Input Power Level Logic HIGH PRH -42
-44
dBm 1 mm POF
200 µm HCS
Peak Input Power Level Logic LOW PRL -20
-22
-2
-10
dBm 1 mm POF
200 µm HCS
|PWD| < 19 ns
2
Supply Current ICC 27 45 mA VO = Open
High Level Output Voltage VOH 4.2 4.7 V IO = 40 µA
Low Level Output Voltage VOH 0.22 0.4 V IO = 1.6 mA
Pulse Width Distortion PWD -19 19 ns
Propagation Delay Time TP_HL or
_LH
150 ns
PIN FUNCTION
1
4
5
6
7
8
CONNECTED TO PIN 4
CONNECTED TO PIN 1
NO CONNECT
V
CC
GND
VO
5
6
7
8
4
1
BOTTOM VIEW,
HFBR-2506AM
SEE NOTE 3
6
HP8082A
PULSE
GENERATOR
50 OHM
LOAD
RESISTOR
BCP MODEL 300
500 Mhz
BANDWIDTH
SILICON
AVALANCHE
PHOTODIODE
HP54002A
50 OHM BNC
INPUT POD
HP54100A
OSCILLOSCOPE
HFB
R-1506AM
Figure 8. Test Circuit for Measuring Unpeaked Rise and Fall Times
Figure 7. Typical POF receiver pulse width distortion vs optical power
7
HFBR-1506AM/2506AM
Mechanical Dimensions
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distributors, please go to our web site.
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Data subject to change.
Copyright © 2003 Agilent Technologies, Inc.
Obsoletes: 5988-8402EN
March 20, 2003
5988-9121EN
