Industrial Ethernet Physical Layer Devices
What is an Industrial Physical Layer Device (PHY)?
An Industrial Ethernet PHY is a physical layer transceiver device for sending and receiving Ethernet frames based on the OSI network model. In the OSI model, Ethernet covers Layer 1 (the physical layer) and part of Layer 2 (the data link layer) and is defined by the IEEE 802.3 standard. The physical layer specifies the types of electrical signals, signaling speeds, media and connector types, and network topologies. It implements the Ethernet physical layer portion of the 1000BASE-T (1000 Mbps), 100BASE-TX (100 Mbps over copper), and 10BASE-T (10 Mbps) standards.
The data link layer specifies how communications occur over the media as well as the frame structure of messages transmitted and received. This simply means how the bits come off the wire and into a bit arrangement so the data can be extracted from the bit stream. For Ethernet, this is called media access control, or MAC for short.
Key Considerations when selecting an Industrial PHY
In automation applications for Industrial Ethernet physical layer devices, there are a few critical features required to ensure high reliability and network resilience.
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Performance
The network cycle time is the communication time required by the controller to both collect and update the data memories of all devices. A low latency PHY reduces network cycle time, improving network refresh time and allowing more devices to be connected to the network.
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Robustness
Built to withstand external radiated and conducted noise sources given the harsh operating environment. Select products that have been tested and adhere to EMI/EMC standards like CISPR 32 and IEC 61000-4-2 through IEC 6100-4-6. This robustness helps prevent lengthy redesign cycles to secure certification later in the development flow.
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Low Power
Devices for industrial applications are typically IP65/IP66 sealed from dust and moisture and, hence, have restricted airflow and limited power dissipation capability. Similarly, these devices are often exposed to high ambient temperature in industrial environments. Because line and ring topologies require two ports and two PHYs, power dissipation is doubled for data in and out.
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ADIN1300
The ADIN1300 integrates an energy efficient Ethernet (EEE) physical layer device (PHY) core with all associated common analog circuitry, input, and output clock buffering, management interface and subsystem registers, as well as MAC interface and control logic to manage the reset and clock control and pin configuration.
PHY Transceivers for Industrial Ethernet
Learn more about the ADIN1300 and ADIN1200 Ethernet transceivers that debuted at SPS 2019. Built for Industrial Ethernet applications, these products provide low power, low latency, and robustness to operate reliably in harsh environments.
Industrial Ethernet Physical Layer Devices
| SortOrder | Part# | Data Rate | MAC Interface | I/O Voltage | Cable Length (max) (meters) | Link Loss Detection | Latency | Power (typ) (W) | Temp Range | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ADIN1300 | 1000Mbps, 100Mbps, 10Mbps | MII/RMII/RGMII | 1.8V, 2.5V, 3.3V | 150 | <10us | 294ns (RGMII) | 330m | -40 to 105°C | $3.99 (ADIN1300BCPZ) |
| 2 | ADIN1200 | 100Mbps, 10Mbps | MII/RMII/RGMII | 1.8V, 2.5V, 3.3V | 180 | <10us | 300ns (MII) | 139m | -40 to 105°C | $1.19 (ADIN1200BCP32Z) |
