EVAL-ADN2525-NT_15 Datasheet, PDF (1/8 Pages) Analog Devices – Optical Evaluation Kit for the ADN2525

Optical Evaluation Kit for the ADN2525
EVAL-ADN2525-NT/ADN2525-OP
GENERAL DESCRIPTION
This data sheet describes the optical evaluation kit for the
ADN2525, a 10 Gbps, active back-termination, differential
laser diode driver. The differential configuration of the output
stage combined with on-chip active back-termination ensures
high quality eye diagrams at lower power consumption compared
with traditional approaches on 10 Gbps laser diode drivers.
Complete specifications can be found in the ADN2525 data
sheet available from Analog Devices, Inc., and should be
consulted in conjunction with this data sheet when using the
evaluation board. The EVAL-ADN2525-OP evaluation kit
consists of an evaluation board that provides optical evaluation
of the ADN2525 with an Opnext 10 Gbps 1310 nm TOSA
(LD5033SMDL). The EVAL-ADN2525-NT evaluation kit
consists of the same evaluation board without a TOSA attached.
To evaluate the performance of the ADN2525, the board must
be connected to the test setup as shown in Figure 1. A fiber
patch cord with an appropriate connector for the TOSA end is
required to connect the TOSA to the oscilloscope.
Z₀ = 50Ω
The power supply must be able to deliver 400 mA at 3.3 V. The
amplitude of the data signal from the pattern generator must be
adjusted to within the ADN2525 data sheet specifications for
data inputs, typically 1 V peak-to-peak differential (500 mV
single-ended on DATAP and DATAN). The oscilloscope/digital
communications analyzer must have a 1310 nm optical channel
that can accept and display properly the optical signals generated by
the TOSA.
The coaxial cables used to connect the pattern generator to the
evaluation board DATAP/DATAN inputs must be suitable for
carrying 10 Gbps signals without significant reduction of
rise/fall time or introduction of pattern jitter. They should also
be a matched pair with a delay skew of ≤2 ps. An example of
suitable cables is the 60 cm Lab-Flex® 160 cables with 2.4 mm
connectors from Florida RF Labs.
TRIGGER OUT
DATA
PATTERN
GENERATOR
DATA
Z₀ = 50Ω
J6
Z₀ = 50Ω
J5
J2
ADN2525
OPTICAL
EVALUATION
BOARD
J4
J1
OPTICAL
FIBER
TOSA
TRIGGER IN
OSCILLOSCOPE/
DIGITAL
COMMUNICATIONS
ANALYZER
POWER SUPPLY
0V TO 1.2V/2mA
POWER SUPPLY
3.3V/400mA
POWER SUPPLY
0V TO 1.2V/2mA
BSET
VCC
MSET
Figure 1. ADN2525 Optical Evaluation Board Test Setup
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
www.analog.com
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