Arria GX FPGA Signal Integrity Center
ArriaTM GX FPGAs deliver solid signal integrity by providing transceivers with excellent jitter characteristics on a flip-chip package.
Arria GX Transceiver Features
The protocol-specific transceivers are tuned to meet and exceed standards compliancy with the following features:
- Serial transceiver channels with clock/data recovery support operating speeds up to 3.125 Gbps
- Devices available with 4, 8, or 12 high-speed full-duplex serial transceiver channels
- Support for CDR-based bus standards such as PCI Express, Gigabit Ethernet, and Serial RapidIO®
- 8B/10B encoder/decoder performs 8-bit to 10-bit encoding and 10-bit to 8-bit decoding
- Individual transmitter and receiver channel power-down capability for reduced power consumption during non-operation
- 1.2- and 1.5-V pseudo current mode logic (PCML) support on transmitter output buffers
- Refer to the transceiver block characteristics in the Arria GX device data sheet (PDF) for DC and switching specifications
Figure 1. Arria GX Transceiver at 2.5 Gbps
Arria GX Signal Integrity Features
Table 1 provides a list of the signal integrity features in Arria GX devices to support the FPGA architecture and to simplify PCB design.
| Table 1. Arria GX FPGA Architecture Signal Integrity Features |
|
Feature
|
Specification |
Benefits |
| LVDS Dynamic Phase Alignment (DPA) |
Source-synchronous I/O operation up to 1.25 Gbps |
- Compensates for skew in board layout, allowing source-synchronous I/O to operate at higher data rates
- Increases likelihood of successful PCB layout
|
| Enhanced Simultaneous Switching Noise (SSN) Support |
Increased power/ground/pin ratio and enhanced package design |
- Reduces the risk of SSN because of high edge-rate signals when using high-speed bus interfaces
- Arria GX FPGAs provide even greater signal, I/O pin, and ground ratio to counter additional transceiver requirements
|
| On-Chip Termination |
Selectable on-chip termination resistors (100, 120, or 150 Ω) |
- Reduces reflections and maintains signal integrity on a variety of transmission media
- Simplifies board design by
minimizing the number of external termination resistors required
|
Documentation
- Arria GX Device Handbook
- Application notes
- White papers
|
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Literature
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