ADM3051CRZ

Overview

The ADM3051CRZ is a high-speed industrial CAN transceiver manufactured by Analog Devices Inc. It operates on a single 5 V supply and complies with the ISO 11898 standard, supporting data rates up to 1 Mbps. The device features short-circuit protection for CANH and CANL against shorts to power or ground in 24 V systems. It includes thermal shutdown protection and offers three operating modes: high speed, slope control, and standby. The component is specified over an industrial temperature range of −40°C to +125°C and is available in an 8-lead SOIC package.

Feature Summary

• Provides bus protection through current-limiting and thermal shutdown features for fault conditions in 24 V systems.
• Supports unpowered nodes without disturbing the bus and allows connection of 110 or more nodes.
• Includes slope control functionality via the RS pin to reduce electromagnetic interference (EMI) using unshielded cables.

Applications

• CAN data buses
• Industrial field networks
• DeviceNet applications
• CanOpen and CanKingdom implementations

Procurement Notes

Verify the specific ordering suffix when purchasing. The base model ADM3051CRZ indicates a tube packaging format, while the REEL7 suffix denotes tape and reel packaging. Confirm that the RoHS compliant designation matches project requirements. Ensure the selected variant aligns with the required manufacturing volume and handling specifications.

Selection Notes

Select this transceiver for applications requiring robust protection in 24 V industrial environments. The choice between high-speed and slope-control modes depends on EMI constraints and cable shielding availability. Verify that the system logic levels are compatible with the CMOS inputs and that the 5 V supply voltage remains within the specified operational limits.

Part Context

This component belongs to the ADM3051 series of physical layer CAN transceivers from Analog Devices. It serves as the interface between protocol layer controllers and the physical bus. The CRZ suffix identifies the specific package type and compliance status within the product family.

Replacement Considerations

Direct replacements must match the 8-lead SOIC package and support 1 Mbps data rates. Consider variants like the ADM3051CRZ-REEL7 for different packaging needs. Cross-family substitutes require verification of isolation ratings and voltage compatibility.

FAQ

How is the low current standby mode activated?

Standby mode is initiated by applying a logic high to the RS pin (Pin 8). In this state, the transmitter is disabled, and the receiver draws minimal current.

What is the function of the RS pin regarding EMI?

Connecting the RS pin to ground enables high-speed operation. Connecting it through a resistor to ground activates slope control, which modifies rise and fall slopes to reduce EMI.

Does the device disturb the bus when unpowered?

No, unpowered nodes do not disturb the bus. The driver outputs enter a high-impedance state when the supply voltage is off.