ATA2400-40
Features
High sensitivity -34dBm.
High dynamic range.
High bandwidth.
Integral thermistor.
Integral non-inverting
amp-light on-> logic high.
Applications
Long reach STM16/OC48 receivers.
Description
10 kΩ
@ 25oC
8
7
6
5
1
2
3
4
The ATA 2400 APD Pre-amp comprises
a high speed APD coupled to a non-
inverting HBT transimpedance amplifier
with a style-ended output. The receiver
is housed in an 8 pin butterfly package
with a single mode fibre pigtail.
The integral thermistor may be used
in an active bias control loop to
compensate for ambient temperature
variation.
DATASHEET
High Performance
Optical Component Solutions
2.5Gb/s APD Preamp Receiver
Characteristics
(Tcase = 25oC,Wavelength = 1550nm,Vcc = 5V unless otherwise stated)
ATA2400-40
High speed APD/Preamp
ATA2400-40
Absolute Ratings
These limits are absolute stress levels only, functional operation of the device is not guaranteed at these levels.
Long - term exposure to these limits could result in reduced reliability of the device.
(Tcase=25oC unless otherwise stated)
Parameter
Module responsivity
Module breakdown voltage
Temperature coef of Vbr
Transimpedance
Bandwidth (-3dB)
Sensitivity
Output amplitude
Overload power
Optical return loss
Power supply voltage
Power supply current
Thermistor resistance
Symbol
R-15
R-13
Vbr
ß
Zt
BW
Pr
Vout
Pol
Prtn
Vcc
Vr
Icc
Rth
Min
0.75
0.70
40
1.8
12
-7
30
10
9.5
Typ
0.92
0.88
52
0.12
1.7
2.4
-34
-5
5
69
10
Max
65
3.2
-32.5
2000
65
80
10.5
Unit
A/W
A/W
V
V/oC
kΩ
GHz
dBm
mVpp
dBm
dB
V
V
mA
KΩ
Conditions
1550nm,M=1
1310nm,M=1
Ir=10µA
ß=dVbr/dTc
DC-coupled,
RL=50Ω
AC-coupled,
RL=50Ω, M=10
2.5Gb/s,
PRBS=2^(23)-1
NRZ,BER=10^(-10)
Vr=optimum Vbias
max. value at -8dBm, M=3
min.value at -34dBM, M=10
M=3
APD bias
Parameter
Operating case temp.
Storage temp.
Supply voltage
APD reverse voltage
APD reverse current
Lead soldering temperature
Lead soldering time
Symbol
Top
Tstg
Vcc
Vr
Ir
-
-
Min
-20
-40
0
0
Typ Max
70
85
6
Vbr
2
250
10
Unit
oC
oC
V
V
mA
oC
s
Conditions
Breakdown voltage (Vbr)
varies from device to device.
Vbr value supplied with
each device
11.2
12.9
15
15.4
30
8.55
6.5
4.4
0.8 6.45
7.94 8 x 0.5
3.4
3 x 2.54 = 7.62
10
10.2
ø2.5 ø1.7
R 1.2 2 X Ø2.4
15
202
7
24
ATA2400-40
Outline Drawing
Dimensions in mm
Pin 1 APD Bias (+)
DC bias voltage for the APD. During
power-up, in order to prevent
forward-biasing the APD, this bias
voltage should be applied before the
pre-amp power (PIN 3) is applied. The
maximum mean current is O.5mA. The
bias voltage will normally be controlled
externally to optimise the operating
point. This voltage will typically range
from 10V to 65V.
Pin 2,7, 5 Ground
Ground all pins for optimum performance.
Pin 3 Vcc (+)
Positive supply voltage between 4.75V
and 5.25V to be applied after the APD
bias voltage is present. The supply
should be filtered to minimise noise
ingress and be capable of delivering up
to 80mA.
Pin 4 Nc
No connection on this pin.
Pin 6 Output
The RF output has a DC offset typically
between 1.9V and 3.0V, so may be AC
coupled into 50Ωload. Maximum
output is 2Vpp.
Pin 8 Thermistor
The negative temp coefficient thermistor
may be used in a control loop to
optimise the bias voltage according to
device temperature. The thermistor has
a nominal resistance of 10kΩat 25oC,
and is not polarity sensitive although
one side is connected to package
ground.
Operating current should be limited to
100µA to prevent self-heating errors.
Instructions for Use - ATA2400-40
ATA2400-40
High speed APD/Preamp
ATA2400-40
Connections
Pin 1 APD bias (+) Pin 5 Ground
2 Ground 6 Output (DC coupled)
3 Power supply Vcc (+) 7 Ground
4 Not connected 8 Thermistor
Device Ordering Information
Order Code No. ATA2400 - 40C**
Connector types: SC/PC = C28, fibre length 975 - 1035mm
FC/PC = C33,fibre length 975 - 1035mm
Certificate No. FM 15040
Certificate No. EMS 35100
Nortel Networks Optical Components Ltd.
Brixham Road
Paignton
Devon
TQ4 7BE
United Kingdom
Tel:+44 1803 662106
Fax: +44 1803 662801
Email: opticalcomponents@nortelnetworks.com
www.nortelnetworks.com/components/
PB0095 ISSUE 2 July 2000
All data in this document is subject to change in accordance with Nortel Networks Corporation policy of continual product improvement. No data in
this document is intended to be used in connection with any contract except as may be first confirmed in writing by Nortel Networks Corporation.
The publication of information in this document does not imply freedom from patent or other rights of Nortel Networks Corporation or others.
© 2000 Nortel Networks. All rights reserved.
© Nortel Networks, Nortel Networks Logo, the Globemark and Unified Networks are trademarks of Nortel Networks.
Information in this document is subject to change without notice. Nortel Networks assumes no responsibility for errors that might appear in this document.
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