EVAL_ADN2530| Application Note
Optical Evaluation Kit for the ADN2530 Differential VCSEL Driver EVAL-ADN2530
GENERAL DESCRIPTION
This data sheet describes the optical evaluation kit for the ADN2530, a 10 Gbps active back-terminated, vertical-cavity surface-emitting laser (VCSEL) driver. The output stage's differential configuration combined with on-chip active backtermination ensures high quality eye diagrams at lower power consumption compared with traditional passive back-termination approaches. The complete ADN2530 specifications are available in the ADN2530 data sheet and need to be consulted in conjunction with this data sheet when using the evaluation board. The optical evaluation kit, EVAL-ADN2530-AOZ, consists of an evaluation board and an 850 nm, 10 Gbps VCSEL TOSA, AOC HFE6192-562. The evaluation kit EVAL-ADN2530-ANZ has the same evaluation board without a TOSA attached. To evaluate the performance of the ADN2530, the board and the test setup must be configured as shown in Figure 1. A multimode fiber patch cord with appropriate connector for the TOSA end is required to connect the TOSA to the sampling scope/digital communica
tions analyzer.
Z0 = 50
The power supply must be able to deliver 200 mA at 3.3 V. The amplitude of the data signal from pattern generator must be adjusted to within the ADN2530 data sheet specifications for data inputs, typically 1 V p-p differential (500 mV single-ended on DATAP and DATAN). The oscilloscope/digital communications analyzer must have an 850 nm optical channel that can accept and display properly the optical signals generated by the TOSA. The co-axial 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
TRIGGER IN
DATA PATTERN GENERATOR
Z0 = 50
J6
ADN2530
OPTICAL EVALUATION BOARD
OPTICAL FIBER
DATA
Z0 = 50
J5 J2 J4 J7 J1
TOSA
OSCILLOSCOPE/ DIGITAL COMMUNICATIONS ANALYZER
BSET
VCC
CPA
MSET
Figure 1. ADN2530 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: 781.329.4700 www.analog.com Fax: 781.461.3113 2007 Analog Devices, Inc. All rights reserved.
06369-001
POWER SUPPLY 0V TO 1.5V/2mA
POWER SUPPLY 3.3V/200mA
POWER SUPPLY 0V TO 3.3V/2mA
POWER SUPPLY 0V TO 1.5V/2mA
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