ETC HFD3904-202

HFD3904
Next Generation 125 MHz PIN Plus Preamp. Analog Receiver
FEATURES
• Industry standard ST¨ fiber connector
• High speed operation Rise/Fall times are 3.0 ns
typical
•
Low pulse-width distortion over a wide range of
inputs due to 23 dB typical dynamic range
•
Wide variety of cable options, operates with 50/125,
62.5/125, and 100/140 µm cables
•
Threaded metal barring and housing
•
Wave solderable
•
Metal package provides enhanced durability and
EMI protection over plastic packages
•
ST-LP2 package
FIBER301.TIF
DESCRIPTION
Next Generation detectors are designed for use in IEEE
802.3 Ethernet and IEEE 802.5J Token Ring applications
such as repeaters, bridges, hubs, routers, switches and
gateways. This inexpensive, high speed analog fiber
optic receiver is intended for use in local area networks
(LANs) where data rates up to 125 Mbits/second are
needed, and could be used as a low cost alternative to
1300 nm components. The hybrid bipolar fiber optic
receiver contains a silicon PIN photodiode for high speed
operation and a preamplifier integrated circuit for
excellent noise immunity.
OUTLINE DIMENSIONS in inches (mm)
The preamplifier stage of the Next Generation detector
converts the current output of the PIN photodiode to a
voltage and amplifies it. The output is a linear voltage
proportional to the optical input over an input range of
less than 1.0 µW to 175 µW peak (1.313 V typical output
voltage swing) providing a dynamic operating range of
23 dB with very low pulse-width distortion.
The receivers are designed to operate on the ECL
standard of -5.2 volts and have very good Power Supply
Rejection Ratio (typically 20 dB at 10 MHz), making them
highly immune to noise pickup. They can also be
operated with a +5 volt supply although some PSRR
performance will be sacrificed at less than 1 MHz.
The receiver output is a proportional analog voltage,
providing cost-effective design flexibility. The circuit
design can be tailored to a particular application, using
inexpensive external components to perform the
conversion to the needed logic levels. This allows for
optimized design, making maximum use of the power
budget for a given data rate/transmission distance
configuration.
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
ODIM_209.cdr
Pinout
1. Output
2. Våå
3. VÙÙ
4. Våå
ST is a registered trademark of AT & T.
The connector can act as a shield. For optimum EMI
shielding, stake pins should be connected to chassis ground.
Signal ground and chassis ground should be bridged with a
high Q 0.01µF capacitor at the fiber optic component.
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431
HFD3904
Next Generation 125 MHz PIN Plus Preamp. Analog Receiver
DESCRIPTION (continued)
Next generation detectors are designed to be low cost
alternatives to other 125 MHz receivers. They are
manufactured with fewer internal components than the
previous 125 MHz receivers, and are pin for pin
compatible with existing 125 MHz receivers. The metal
package provides enhanced durability and EMI shielding
over plastic packages.
432
h
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
HFD3904
Next Generation 125 MHz PIN Plus Preamp. Analog Receiver
ELECTRO-OPTICAL CHARACTERISTICS (Våå = -5.2 V, Tà= -40¡C to +85¡C unless otherwise specified)
PARAMETER
SYMBOL
Responsivity
Tà -25¡C
Over Temp. Range
Input Power
Tà=25¡C
MIN
TYP [À] MAX
R
5.3
4.5
7.5
Bandwidth
RMS Noise Output Voltage
9.6
11.5
PÛÜ (peak)
-3.6
9
-7.6
175
-8.2
150
-2.8
15
PWD
3.0
3.0
0.2
4.5
6.3
2.5
BW
VÜÞ
125
0.52
0.58
Over Temp. Range
DC Output Voltage [Â]
Power Supply Current
Rise/Fall Time
Tà=25¡C
Over Temp. Range
Pulse Width Distortion [Ã]
UNITS
mV/µW
VÏ°Ù
IÙÙ
tß/t¸
-4.2
0.70
Output PSRR [Ä]
Output Overshoot
Output Resistance
RMS Input Noise Power [Å]
PÜÛ
20
10
20
-41.3
74
13
-41.0
79
dBm
µW
dBm
µW
V
mA
ns
ns
MHz
mV
mV
mV
dB
%
í
dBm
nW
TEST CONDITIONS [Á]
f = 50MHz, PÛÜ = 100µW peak,
æ = 850 nm, 62.5 µm core fiber
f = 50 MHz, æ = 850 nm
PWD –2.5 ns
PÛÜ – 0.1 µW
RÚÞà° = 0
f = 10MHz, PÛÜ = 100µW peak
æ = 850 nm
f = 50 MHz, PÛÜ = 150 µm peak,
æ = 850 nm
æ = 850 nm, R = 0.707 R max.
PÛÜ = 0 µW, 75 MHz, 3 pole
Bessel filter on output
No filter on output
f = 10 MHz
PÛÜ = 10 µW
f = 50 MHz
PÛÜ = 0 µW, 75 MHz, 3 pole
Bessel filter on output
Notes
1. Typical specifications are for operations at Tà= 25¡C.
2. Output pin should be AC coupled to a 511 ì load. Load capacitance <5 pf (See circuit diagram).
3. Quiescent output voltage VÞ°Ù = VÙÙ - Vout. Dynamic output voltage swing is below the quiescent output voltage (VÞ= VÞ°Ù+ R x
PÛÜ).
4. Measured at the 50% amplitude point on the output waveform.
5. Output PSRR is defined as 20 log (Vsupply Ripple/Vout Ripple).
6. Input referred noise is calculated as PÜÛ = VÜÞ/R
ABSOLUTE MAXIMUM RATINGS
(Tcase = 25¡C unless otherwise noted)
RECOMMENDED OPERATING CONDITIONS
Supply voltage (VÙÙ - Våå)
-0.5 to -6.0 V
Storage temperature
-55 to +85¡C
Optical signal input
1.0 to 125 µW
Operating temperature
-40 to +85¡C
Operating temperature
0 to 70¡C
Lead solder temperature
260¡C, 10 s
Stresses greater than those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect
reliability.
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
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433
HFD3904
Next Generation 125 MHz PIN Plus Preamp. Analog Receiver
ORDER GUIDE
Description
Catalog Listing
Threaded metal barrel and housing HFD3904-202
CAUTION
The inherent design of this component causes
it to be sensitive to electrostatic discharge
(ESD). To prevent ESD-induced damage
and/or degradation to equipment, take normal
ESD precautions when handling this product.
CIRCUIT DIAGRAM
SWITCHING WAVEFORM
FIBER006.SCH
Fig. 1
Spectral Responsivity
FIBER213.CIR
Fig. 2
FIBER102.GRA
Pulse Width Distortion vs Optical Input
FIBER066.GRA
Power
All Performance Curves Show Typical Values
434
h
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.