PCB Stackup Design Considerations for Intel® FPGAs

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ID 683883
Date 6/28/2017
Public
Document Table of Contents
Document Table of Contents x
1. PCB Stackup Design Considerations for Intel® FPGAs
1. PCB Stackup Design Considerations for Intel® FPGAs x
1.1. PCB Stackup Construction 1.2. Material Selection 1.3. Glass Transition Temperature 1.4. PCB Stackup Design 1.5. PCB Panelization 1.6. Conclusion 1.7. Specific Recommendations for Intel® FPGA Devices 1.8. References 1.9. Document Revision History
1.2. Material Selection x
1.2.1. Material Loss Considerations
1.2.1. Material Loss Considerations x
1.2.1.1. Relative Dielectric Constant 1.2.1.2. Loss Tangent 1.2.1.3. Fiberglass Weave Composition 1.2.1.4. Skin Effect
1.4. PCB Stackup Design x
1.4.1. Layer Count 1.4.2. Signal Layers 1.4.3. High Speed Signal Layer Planning 1.4.4. Power and Ground Layers 1.4.5. Power Plane and Capacitor Placement Strategy 1.4.6. Planar Capacitance and Spreading Inductance 1.4.7. Plane Layer Separation 1.4.8. Copper Weight 1.4.9. Hybrid Construction
1.4.5. Power Plane and Capacitor Placement Strategy x
1.4.5.1. General Rules for Capacitor and Power Plane Placement 1.4.5.2. Rules for Transceiver Power Plane Placement 1.4.5.3. Rules for High-Current Power Rails 1.4.5.4. Rules for PLL and Other Power Rails
1.7. Specific Recommendations for Intel® FPGA Devices x
1.7.1. Stratix® 10 Device Recommendations 1.7.2. Stratix® V Device Recommendations 1.7.3. Stratix IV Device Recommendations 1.7.4. Arria® 10 Device Recommendations 1.7.5. Arria® V Device Recommendations 1.7.6. Arria II Device Recommendations 1.7.7. Cyclone® 10 Device Recommendations 1.7.8. Cyclone® V Device Recommendations 1.7.9. Cyclone® IV Device Recommendations 1.7.10. Cyclone III Device Recommendations
1.7.1. Stratix® 10 Device Recommendations x
1.7.1.1. Stratix® 10 Device Family Power Plane Placement Example
1.7.2. Stratix® V Device Recommendations x
1.7.2.1. Stratix® V GX, GT, and GS Family Power Plane Placement Example 1.7.2.2. Stratix® V E Family Power Plane Placement Example 1.7.2.3. Stratix® V Transceiver Channel Breakout Recommendations
1.7.3. Stratix IV Device Recommendations x
1.7.3.1. Stratix IV GX and GT Family Power Plane Placement Example 1.7.3.2. Stratix IV E Family Power Plane Placement Example
1.7.4. Arria® 10 Device Recommendations x
1.7.4.1. Arria® 10 Device Family Power Plane Placement Example
1.7.5. Arria® V Device Recommendations x
1.7.5.1. Arria® V Device Family Power Plane Placement Example
1.7.6. Arria II Device Recommendations x
1.7.6.1. Arria II GX Family Power Plane Placement Example
1.7.7. Cyclone® 10 Device Recommendations x
1.7.7.1. Cyclone® 10 LP Device Family Power Plane Placement Example
1.7.8. Cyclone® V Device Recommendations x
1.7.8.1. Cyclone® V Device Family Power Plane Placement Example
1.7.9. Cyclone® IV Device Recommendations x
1.7.9.1. Cyclone® IV GX Family Power Plane Placement Example 1.7.9.2. Cyclone® IV E Family Power Plane Placement Example
1.7.10. Cyclone III Device Recommendations x
1.7.10.1. Cyclone III Family Power Plane Placement Example
1. PCB Stackup Design Considerations for Intel® FPGAs

1.4.9. Hybrid Construction

One technique to control cost in high speed designs is to use hybrid construction PCBs. In hybrid construction, only the layers where the high performance signals are required use a higher cost but lower loss copper clad laminate core. All other layers can use a lower cost FR4 derivative core material. A common requirement for hybrid construction is to maintain a homogeneous prepreg (usually FR4) throughout the PCB to bond the core layers together. Mixing prepreg in the PCB can result in lamination issues because different temperatures may be required for the different prepregs to bond properly. For example, consider a design where very high speed transceiver channels are to be routed only on the top and bottom layers using embedded microstrip topology to avoid any via stubs without backdrilling. In this case, the top and bottom layers can use a low-loss core such as Rogers 4350B while the rest of the internal layers can use typical FR4 cores.

Figure 15. Hybrid PCB Stackup
Level Two Title