ETC HFBR-2528

10 Megabaud Versatile Link
Fiber Optic Transmitter
and Receiver for 1 mm POF and
200 µm HCS®
HFBR-0508 Series
HFBR-1528 Transmitter
HFBR-2528 Receiver
Technical Data
Features
Applications
• Data Transmission at Signal
Rates of dc to 10 MBd
• Up to 50 Meters Distances
with 1 mm Plastic Optical
Fiber (POF)
• Up to 500 Meters Distances
with 200 µm Hard Clad
Silica (HCS®)
• Wide Dynamic Range
Receiver Allows Operation
from Zero to Maximum Link
Distance with a Single
Transmitter Drive Current
• Link Distances Specified for
Variations in Temperature,
Power Supply, and Fiber
Attenuation
• DC Coupled Receiver with
CMOS/TTL Output for Easy
Designs: No Data Encoding
or Digitizing Circuitry
Required
• Pulse Width Distortion
Controlled to Limit
Distortion from Low Duty
Cycle or Burst Mode Data
• High Noise Immunity
• Compatible with Agilent’s
Versatile Link Family of
Connectors, for Easy
Termination of Fiber
• Industrial Control and
Factory Automation
• Serial Field Buses
• Intra-System Links; Boardto-Board, Rack-to-Rack
• Extension of RS-232, RS-485
• Elimination of Ground Loops
• High Voltage Isolation
• Reduces Voltage Transient
Susceptibility
Description
The HFBR-0508 Series consists of
a fiber-optic transmitter and
receiver operating at a 650 nm
wavelength (red). The HFBR1528 transmitter is an LED in a
low cost plastic housing designed
to efficiently couple power into
200 µm diameter HCS and 1 mm
diameter POF. The HFBR-2528
receiver incorporates a PIN detector and digital output IC compatible with CMOS and TTL logic
families.
HFBR-0508 links operate from
DC to 10 MBd at distances up to
50 meters with 1 mm POF and up
to 500 meters with 200 µm HCS ®.
No minimum link distances are
required when using recommended circuits, simplifying
design.
Versatile Link components can be
interlocked (N-plexed together) to
minimize space and to provide
dual connections with the duplex
connectors. Up to eight packages
can be interlocked and inserted
into a printed circuit board.
POF and HCS are available in preconnectored lengths or can be
easily field-terminated. A single
transmitter drive current for POF
and HCS allows both fibers to be
used with a single design.
HCS ® is a registered trademark of SpecTran Corporation.
CAUTION:. 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.
2
HFBR-0508 Series 10 MBd Data Link
Typical Link Performance, TA = +25°C
Parameter
Symbol
fS
Signaling Rate
Link Distance with Extra Low Loss POF Cable
Link Distance with 200 µm HCS Cable
Typ.[1]
15
100
900
Unit
Mb/s
m
m
Condition
NRZ
10 MBd
10 MBd
Note
2
2, 3, 5
2, 4, 5
Specified Link Performance, TA = -40° to +85°C, DC to 10 MBd, unless otherwise noted.
Parameter
Signaling Rate
Link Distance with Extra Low
Loss POF Cable
Symbol
fS
Link Distance with 200 µm
HCS Cable
Pulse Width Distortion
PWD
Min.
DC
0.1
0.1
0.1
0.1
0.1
0.1
-30
-50
Max.
10
50
40
30
500
300
100
+30
+50
Unit
Mb/s
m
m
ns
ns
Condition
NRZ
+25°C
0 to +70°C
-40 to +85°C
+25°C
0 to +70°C
-40 to +85°C
25 – 75% Duty Cycle
Arbitrary Duty Cycle
Note
2
2, 3, 5
2, 4, 5
2
Absolute Maximum Ratings
Parameter
Storage and Operating Temperature
Receiver Supply Voltage
Receiver Average Output Current
Receiver Output Power Dissipation
Transmitter Peak Forward Input Current
Transmitter Average Forward Input Current
Transmitter Reverse Input Voltage
Lead Soldering Cycle
Temp
Time
Symbol
TS,O
VCC
IO,AVG
POD
IF,PK
IF,AVG
VR
TSOL
Min.
-40
-0.5
-16
Max.
+85
+5.5
+16
80
90
60
3
+260
10
Unit
°C
V
mA
mW
mA
mA
V
°C
sec
Note
6
7
7
Recommended Operating Conditions
Parameter
Ambient Temperature
Power Supply Voltage
Transmitter Peak Forward Current
Transmitter Average Forward Current
Fanout (7400 Series TTL)
Symbol
TA
VCC
IF,PK
IF,AV
N
Min.
-40
4.75
20
Max.
+85
5.25
90
60
1
Unit
°C
V
mA
mA
Condition
Note
<100 mVp-p Noise
Notes:
1. Typical data at +25°C, VCC = 5 V.
2. With recommended transmitter and receiver application circuits (60 mA nominal drive current).
3. POF is HFBR-R/EXXYYY plastic (1 mm) optical fiber. Worst case attenuation used (0.23 dB/m from -40°C to +85°C at 660 nm).
4. HCS is HFBR-H/VXXYYY hard clad silica (200/230 µm) fiber. Worst case attenuation is used (10 dB/km from 0°C to +70°C and
12 dB/km from -40°C to +85°C at 650 nm).
5. BER ≤ 10-9, 2 23 - 1 PRBS NRZ 10 MBd.
6. For IF,PK > 60 mA, the duty factor must maintain IF,AV ≤ 60 mA and pulse with ≤ 1 µs.
7. 1.6 mm below seating plane.
6
3
8 GROUND
HFBR-1528 Transmitter
The HFBR-1528 transmitter
incorporates a 650 nm LED in a
light gray, nonconductive plastic
housing. The high light output
power enables the use of both
plastic optical fiber (POF) and
Hard Clad Silica (HCS) fiber. This
transmitter can be operated up to
10 MBd using a simple driver
circuit. The HFBR-1528 is compatible with all Versatile Link
connectors.
ANODE
CATHODE
1
2
GROUND
3
GROUND
4
5 GROUND
SEE NOTE 5
HFBR-1528 Transmitter, Top View
Electrical and Optical Characteristics: TA = -40° to +85°C unless otherwise noted.
Parameter
Peak Output Power
1 mm POF, 60 mA
Peak Output Power
1 mm POF, 20 mA
Symbol
Min.
PT
-6.0
PT
Peak Output Power
200 µm HCS, 60 mA
PT
Optical Power Temperature Coefficient
∆PT /∆T
Typ.[1] Max.
-3.5
-15.6
-9.0
-2.0
dBm
IF,dc = 60 mA
2, 3
Fig. 2
0 to +70
-16.8
-0.7
-40 to +85
-16.1
-12.5
640
-8.5
dBm
-8.0
-7.2
-40 to +85
-0.40
%/°C
-0.02
dB/°C
650
660
nm
662
nm
2.1
2.65
0 to +70
Fig. 3
- 40 to +85
21
1.8
+25
0 to +70
FWHM
Diode Capacitance
2, 3
Fig. 2
-1.5
Spectral Width
VBR
IF,dc = 20 mA
+25
-16.5
nm/°C
Reverse Input Breakdown Voltage
2, 3
Fig. 2
-40 to +85
0.12
∆VF /∆T
IF, dc = 60 mA
+1.3
∆λ/∆T
Forward Voltage Temperature Coefficient
+25
-7.2
635
VF
Note
0 to +70
Peak Wavelength
Temperature
Coefficient
Forward Voltage
Conditions
+0.5
-17.0
λP
dBm
TA (°C)
-6.9
-17.3
Peak Emission
Wavelength
0.0
Units
V
Fig. 3
IF,dc = 60 mA
-1.8
mV/°C
13
V
IF,dc = -10 µA
CO
60
pF
VF = 0 V,
f = 1 MHz
Transmitter
Numerical Aperture
NA
0.5
Thermal Resistance,
Junction to Case
θjc
140
°C/W
50 Ω Optical Rise Time
tr
13
ns
50 Ω Optical Fall Time
tf
10
ns
3.0
Fig. 1
Fig. 1
4
10% to 90%,
IF = 60 mA
Notes:
1. Typical data are at 25°C.
2. Optical power measured at the end of 0.5 meters of 1 mm diameter plastic or 200 µm diameter hard clad silica fiber with a large area
detector.
3. Minimum and maximum values for PT over temperature are based on a fixed drive current. The recommended drive circuit has
temperature compensation which reduces the variation in PT over temperature; refer to Figures 4 and 6.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1528.
5. Pins 5 and 8 are for mounting and retaining purposes, but are electrically connected; pins 3 and 4 are electrically isolated. It is
recommended that pins 3, 4, 5 and 8 all be connected to ground to reduce coupling of electrical noise.
6. Refer to the “Plastic Optical Fiber and HCS Fiber Cable and Connectors for Versatile Link” Technical Data Sheet for cable connector
options for 1 mm plastic and 200 µm HCS optical fiber.
2.5
VF – FORWARD VOLTAGE – V
-40° C
0° C
2.3
25° C
70° C
2.1
1.9
85° C
1.7
1.5
1
10
100
PT – NORMALIZED OUTPUT POWER – dB
4
0
25° C
-10
85° C
-20
-30
-40
1
10
100
Figure 2. Typical Normalized Optical Power vs. Drive
Current.
1.2
1.4
-40° C
1.2
NORMALIZED OUTPUT POWER
NORMALIZED SPECTRAL OUTPUT POWER
-40° C
IF,DC – TRANSMITTER DRIVE CURRENT – mA
IF,DC – TRANSMITTER DRIVE CURRENT – mA
Figure 1. Typical Forward Voltage vs. Drive Current.
10
0° C
1.0
25° C
0.8
70° C
0.6
85° C
0.4
0.2
0
610
630
650
670
690
VCC = 5.25 V
1.1
VCC = 5.0 V
1.0
0.9
VCC = 4.75 V
0.8
0.7
-40
0
-20
WAVELENGTH (nm)
20
40
60
80
TEMPERATURE – °C
Figure 3. Typical Normalized Optical Spectra.
Figure 4. Typical Normalized Optical Power vs. Temperature
(in Recommended Drive Circuit).
VCC
C1
2
R1
C2
1
1
PWD – ns
0
3
6
VCC = 5.0 V
8
DATA
VCC = 4.75 V
-3
5
7
4
-4
0
4
5
1/2 SN75451
-2
-20
8
2
VCC = 5.25 V
-1
-5
-40
HFBR-1528
R2
20
40
60
80
TEMPERATURE – °C
Figure 5. Typical Optical Pulse Width Distortion vs.
Temperature and Power Supply Voltage (in Recommended
Drive Circuit).
VALUE
TOLERANCE
R1
2 KΩ
5%
R2
47 Ω
1%
C1
0.1 µF
20 %
C2
1.0 µF
20 %
Figure 6. Recommended Transmitter Drive Circuit
(IF,on = 60 mA Nominal at TA = 25°C).
WARNING: WHEN VIEWED UNDER SOME CONDITIONS, THE OPTICAL PORT MAY EXPOSE
THE EYE BEYOND THE MAXIMUM PERMISSIBLE EXPOSURE RECOMMENDED IN ANSI
Z136.2, 1993. UNDER MOST VIEWING CONDITIONS THERE IS NO EYE HAZARD.
5
HFBR-2528 Receiver
The HFBR-2528 receiver 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 10 MBd with low
PWD for arbitrary data patterns.
The receiver output is a “pushpull” stage compatible with TTL
and CMOS logic. The receiver
housing is a dark, conductive
plastic, compatible with all
Versatile Link connectors.
GROUND 5
4
3
IC
NO CONNECT
VCC
2
GROUND
1
VO
GROUND 8
SEE NOTES 5,7
HFBR-2528 Receiver, Top View
Electrical and Optical Characteristics: TA = -40° to +85°C, 4.75 V < VCC < 5.25 V, unless
otherwise noted.
Parameter
Peak POF Sensitivity:
Minimum Input for
Logic “0”
Peak POF Overdrive
Limit:Maximum
Input for Logic “0”
Peak POF Off State
Limit: Maximum
Input for Logic “1”
Peak HCS
Sensitivity: Minimum
Input for Logic “0”
Peak HCS Overdrive
Limit: Maximum
Input for Logic “0”
Peak HCS Off State
Limit: Maximum
Input for Logic “1”
Supply Current
High Level Output
Voltage
Low Level Output
Voltage
Output Rise Time
Output Fall Time
Thermal Resistance,
Junction to Case
Electric Field
Immunity
Power Supply
Noise Immunity
Symbol Min. Typ.[1] Max.
PRL,min
-23.0 -21.0
-20.0
-19.5
PRL,max +1.0 +5.0
+0.0
-1.0
PRH,max
-42
PRL,min
PRL,max
-25.0
-1.0
-2.0
-3.0
-23.0
-22.0
-21.5
+3.0
Unit
dBm
dBm
TA (°C)
+25
0 to +70
-40 to +85
+25
0 to +70
-40 to +85
dBm
dBm
dBm
+25
0 to +70
-40 to +85
+25
0 to +70
-40 to +85
Condition
Note
1 mm POF,
2,6
|PWD| < 30 ns
Fig.
2,4
1 mm POF,
|PWD| < 30 ns
2,3,
6
1,2,
3
1 mm POF
2,6,
8
200 µm HCS,
|PWD| < 30 ns
2,6
200 µm HCS,
|PWD| < 30 ns
2,3,
6
2,6,
8
-44
dBm
200 µm HCS
27
4.7
45
mA
V
VO = Open
IO = -40 µA
VOL
0.22
0.4
V
tr
tf
θjc
12
10
200
30
30
ns
ns
°C/W
CL = 10 pF
CL = 10 pF
6
6
4
EMAX
8
V/m
5
0.4
Vpp
Near Field,
Electrical
Field Source
Sine Wave
DC - 10 MHz
PRH,max
ICC
VOH
PSNI
4.2
0.1
IO = +1.6 mA
6
Notes:
1. Typical data are at +25°C, VCC = 5.0 V.
2. Input power levels are for peak (not average) optical input levels. For 50% duty cycle data, peak optical power is twice the average
optical power.
3. Receiver overdrive (PRL,max ) is specified as the limit where |PWD| will not exceed 30 ns. The receiver will be in the correct state
(logic “0”) for optical powers above PRL,max. However, it may not meet a 30% symbol period PWD if the overdrive limit is exceeded.
Refer to Figure 2 for PWD performance at high received optical powers.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-2528.
5. Pins 5 and 8 are electrically connected to the conductive housing and are also used for mounting and retaining purposes. It is required
that pins 5 and 8 be connected to ground to maintain conductive housing shield effectiveness.
6. In recommended receiver circuit, with an optical signal from the recommended transmitter circuit.
7. Pin 4 is electrically isolated internally. Pin 4 may be externally connected to pin 1 for board layout compatibility with HFBR-25X1,
HFBR-25X2 and HFBR-25X4. Otherwise it is recommended pin 4 be grounded as in Figure 5.
8. BER ≤ 10E-9, includes a 10.8 dB margin below the receiver switching threshold level (signal to noise ratio = 12).
6
30
6
5
20
VCC = 5.0 V
RECEIVED PWD – ns
RECEIVED POWER – dBm
VCC = 5.25 V
4
VCC = 4.75 V
3
2
0
-10
-20
1
0
-40 -20
10
0
20
40
60
80
-30
-22
100
-18
-14
-10
-6
-2
2
PRL – RECEIVER OPTICAL INPUT POWER – dBm
TEMPERATURE – °C
Figure 1. Typical POF Receiver Overdrive, PRL,max, at
10 MBd, vs. Temperature and Power Supply Voltage.
Figure 2. Typical POF Receiver Pulse Width Distortion vs.
Optical Power at 10 MBd.
16
-13
15
-14
13
PWD – ns
PWD – ns
14
12
-15
-16
11
-17
10
9
4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
-18
4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
VCC – VOLTS
VCC – VOLTS
Figure 3. Typical POF Receiver Pulse Width Distortion
vs. Power Supply Voltage at High Optical Power
(0 dBm,pk, 10 MBd).
HFBR-2528
R1
4
5
3
IC
2
1
8
VALUE
TOLERANCE
R1
2.7 Ω
5%
C1
0.1 µF
20 %
VCC
C1
DATA
Figure 5. Recommended Receiver Application Circuit.
Figure 4. Typical POF Receiver Pulse Width Distortion vs.
Power Supply Voltage at Low Optical Power, (-21 dBm,pk,
10 MBd).
7
8 GROUND
3 VCC
FIRST BIT
BURST PWD
CORRECTION
AMPLIFIER
PIN
PHOTODIODE
COMPARATOR
1 VO, DATA
THRESHOLD
GENERATOR
REFERENCE
VOLTAGE
2 GROUND
5 GROUND
Figure 6. HFBR-2528 Receiver Block Diagram.
Versatile Link Mechanical Dimensions
Versatile Link Printed Circuit Board
Layout Dimensions
PIN NO.1 INDICATOR
7.62
(0.300)
2.0
(0.080)
2.54
(0.100)
6.5
(0.255)
1.01° (0.040) DIA.
10.2
(0.400)
5.1
(0.200)
18.9
(0.743)
0.64
(0.025)
1.27
(0.050)
2.5
(0.100)
0.64 (0.025) DIA.
NOTE: ALL DIMENSIONS IN MM (INCHES).
ALL DIMENSIONS ± 0.25 mm UNLESS
OTHERWISE SPECIFIED.
ELECTRICAL PIN FUNCTIONS
TRANSMITTER
PIN NO. HFBR-1528
1
2
3
4
5
8
ANODE
CATHODE
GROUND*
GROUND*
GROUND**
GROUND**
1
8
1.85 MIN.
(0.073)
0.51
(0.020)
1.73
(0.068)
2
7.62
(0.300)
5
3.81(0.150) MAX.
3.56 (0.140) MIN.
3.0
(0.118)
3
4.2
(0.165)
7.62
(0.300)
7.62
(0.300)
4
RECEIVER
HFBR-2528
SIGNAL, VO
GROUND
VCC (+5 V)
GROUND*
GROUND**
GROUND**
* NO INTERNAL CONNECTION,
GROUND CONNECTION RECOMMENDED.
** PINS 5 AND 8 CONNECTED INTERNALLY
TO EACH OTHER.
TOP VIEW
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Data subject to change.
Copyright © 2002 Agilent Technologies, Inc.
Obsoletes 5963-3591E
April 2, 2002
5988-5674EN