Fea tures
Low Cost
Data Rates up to 155 MBd
Wide Temperature Range
SMA, ST*, or plastic cap style
Wave Solderable
De scrip tion
The OPF560 series receiver is a low cost
solution for high speed fiber optic
communication designs.
The output of the receiver is an analog,
low impedance, emitter follower voltage
source capable of driving an amplifier or
level translating circuitry. This allows the
subsequent circuitry to use the device in
either the analog mode or translated to
ECL/TTL levels for use in a digital mode
at data rates up to 155MBaud.
The receiver is comprised of a high
speed, low noise, photodiode coupled to
a transimpedance amplifier which
produces an output voltage proportional
to the input light amplitude. This hybrid
approach solves many of the problems of
high speed data link designs by placing a
pre-amplifier close to the photodiode.
The amplification of the transimpedance
amplifier makes the output signal much
less susceptible to EMI.
An AC coupled receiver application
circuit is shown. Both the 10 ohm
resistor and by-pass capacitor are
critical.
*ST is a registered trademark of AT&T.
Ab so lute Maxi mum Rat ings (T
A
= 25
o
C un less oth er wise noted)
Stor age Tem pera ture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to +85
o
C
Op er at ing Tem pera ture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to +85
o
C
Lead Sol der ing Tem pera ture (for 10 sec.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
o
C
Sig nal Pin Volt age. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to V
CC
Sup ply Volt age (V
CC
- V
EE
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 6.0 V
Out put Cur rent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA
Prod uct Bul le tin OPF560
Feb ru ary 1996
125 MHz Fiber Optic Receiver
Types OPF560, OPF561, OPF562
Op tek Tech nol ogy, Inc. 1215 W. Crosby Road Car roll ton, Texas 75006 (972) 323- 2200 Fax (972) 323- 2396
This component is susceptible to damage from electrostatic discharge (ESD). Normal
static precautions should be taken in handling and assembly of this component to
prevent ESD damage or degradation.
OPF560
V
EE
OPF561
OPF562
V
EE
OUTPUT
V
CC
V
EE
OUTPUT
V
CC
V
CC
OUTPUT
8-108
Types OPF560, OPF561, OPF562
Elec tri cal Char ac ter is tics (T
A
= 25
o
C un less oth er wise noted)
-5.45
Sup ply Volt age
-4.75, R
LOAD
= 511
, Fi ber Sizes
100 Mi crons, N.A.
0.35
SYM BOL
PA RAME TER
MIN TYP MAX UNIT
TEST CON DI TION
R
P
Responsivity
5.3
7
9.6
mV/
W at 840 nm, 50 MHz
4.5
11.5 mV/
W at 840 nm, 50 MHz -40
o
C
T
A
+85
o
C
V
NO
RMS Output Noise Voltage
0.40
0.59
mV
Bandwidth Filtered @ 75 MHz, P
R
= 0
W
0.7
mV
Unfiltered Bandwidth P
R
= 0
W
P
N
Equivalent Optical Noise Input Power
(RMS)
-43.0 -41.4
dBm
Bandwidth Filtered @ 75 MHz
0.050 0.065
W
P
R
Peak Input Power
-7.6
dBm
T
A
= 25
o
C
175
W
T
A
= 25
o
C
-8.2
dBm
-40
o
C
T
A
+85
o
C
150
W
-40
o
C
T
A
+85
o
C
V
odc
DC Output Voltage
-4.2
-3.1
-2.4
V
P
R
= 0
W
I
EE
Power Supply Current
9
15
mA
R
LOAD
=
t
r
, t
f
Rise Time, Fall Time
(10% to 90%)
3.3
6.3
ns
P
R
= 100
W, R
LOAD
= 511
,
C
LOAD
= 5 pF
PWD
Pulse Width Distortion
0.4
2.5
ns
P
R
= 150
W Peak, Pwidth = 10 ns,
50% Duty Cycle
BW
Bandwidth
125
MHz
-3 dB Electrical
PSRR
Power Supply Rejection Ratio
20
dB
@ 10 MHz
Recommended AC Coupled
Receiver Circuit
OUTPUT
8-109
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