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User Guide for
FEBFOD8012_RS485
Evaluation Board
Bi-Directional Logic Gate Optocoupler
Provides Proven and Reliable Isolation to
the RS485 Interface
Featured Fairchild Product:
FOD8012
Direct questions or comments
about this evaluation board to:
"Worldwide Direct Support"
Fairchild Semiconductor.com
© 2012 Fairchild Semiconductor Corporation
FEBFOD8012_RS485 • Rev. 1.0.0
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Table of Contents
Related Manuals for Fairchild FEBFOD8012-RS485
Summary of Contents for Fairchild FEBFOD8012-RS485
- Page 1 Bi-Directional Logic Gate Optocoupler Provides Proven and Reliable Isolation to the RS485 Interface Featured Fairchild Product: FOD8012 Direct questions or comments about this evaluation board to: “Worldwide Direct Support” Fairchild Semiconductor.com © 2012 Fairchild Semiconductor Corporation FEBFOD8012_RS485 • Rev. 1.0.0...
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Page 2: Table Of Contents
3.2. Test Procedures and Conditions ..................5 Schematic ..........................6 Scope Shots ..........................7 Conclusion ..........................8 Revision History ........................9 © 2012 Fairchild Semiconductor Corporation FEBFOD8012_RS485 • Rev. 1.0.0... -
Page 3: Introduction
This user guide supports the evaluation kit for the FOD8012. It should be used in conjunction with the FOD8012 datasheet as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at www.fairchildsemi.com. Introduction The FOD8012 is an industry-first, full-duplex, bi-directional, logic-gate optocoupler with high noise immunity as well as proven and reliable optical isolation. -
Page 4: Photographs
In addition, a single-channel logic-gate optocoupler with open collector output, FODM8061, isolates the driver-enable pin of the transceiver. Figure 2. Photographs of the FEBFOD8012_RS485 Board Printed Circuit Board Figure 3. FEBFOD8012_RS485 Board Setup © 2012 Fairchild Semiconductor Corporation FEBFOD8012_RS485 • Rev. 1.0.0... -
Page 5: Board Setup And Operation
3.1. Board Setup and Operation The FEBFOD8012_RS485 evaluation board enables users to make a quick and accurate assessment of Fairchild’s FOD8012 in a bi-directional data transmission application. The setup requires two power supply sources. V (J1) is on one side of the isolation barrier... -
Page 6: Schematic
The FEBFOD8012_RS485 board is designed for evaluation of the FOD8012 timing sequence and AC test performance with an RS485 transceiver. It should be used in conjunction with the product datasheet. Figure 4. Evaluation Board Schematic © 2012 Fairchild Semiconductor Corporation FEBFOD8012_RS485 • Rev. 1.0.0... -
Page 7: Scope Shots
Figure 5. DRIVER_EN and VINB are Input Signals; FOD8012 Output Signal, VOB, Drives RS485 Transceiver Figure 6. FOD8012 Output Signal, VOB, Drives the RS485 Transceiver; Resulting RS485 Output Signals, V and V , are Single-Ended Output Signals; V = Differential (A-B) Output Signal © 2012 Fairchild Semiconductor Corporation FEBFOD8012_RS485 • Rev. 1.0.0... -
Page 8: Conclusion
The FEBFOD8012_RS485 evaluation board allows the user to evaluate the performance of the FOD8012 in a bi-directional data-transmission application with the RS485 transceiver. Measurement results clearly demonstrate the high-speed performance of the FOD8012. © 2012 Fairchild Semiconductor Corporation FEBFOD8012_RS485 • Rev. 1.0.0... -
Page 9: Revision History
Fairchild warrantees that its products meet Fairchild’s published specifications, but does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function, or design. - Page 10 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Fairchild Semiconductor FEBFOD8012_RS485...