Summary of LTM2889 – Isolated CAN FD µModule Transceiver and Power
The LTM2889 is a complete, galvanically-isolated CAN FD transceiver featuring an integrated DC/DC converter that eliminates the need for external components. It supports 3.3V or 5V input supplies and provides up to 150mA of isolated power output with 2500VRMS isolation. Designed for harsh environments, it offers high common mode transient immunity, robust fault tolerance, and compliance with ISO 11898-2 standards within a compact BGA package.
Parts used in the LTM2889 Isolated CAN FD Transceiver:
- LTM2889 µModule Transceiver
- Integrated Isolated DC/DC Converter
- Coupled Inductors
- Isolation Power Transformer
- Variable Slew Rate Driver
- SPLIT Pin
- Transmit Data (TXD) Dominant Timeout Function
- Adjustable Regulator
Features
- Isolated 4Mbps CAN FD Transceiver
- 2500VRMS for 1 Minute Per UL1577
- Isolated DC Power: 5V (Adjustable to 3.3V)
- Up to 150mA Available Isolated Power Output
- 3.3V or 5V Input Supply Voltage Options
- UL-CSA Recognized File #E151738
- No External Components Required
- High Bus Fault Voltage Tolerance: ±60V
- Low Power OFF Mode: <1µA Typical
- High Common Mode Transient Immunity: 30kV/µs
- Variable Slew Rate Driver with Active Symmetry Control and SPLIT Pin for Low EME
- Fully ISO 11898-2 and CAN FD Compliant
- Ideal Passive Behavior to CAN Bus with Supply Off
- Transmit Data (TXD) Dominant Timeout Function
- High ESD: ±25kV CANH, CANL to GND2 and VCC2; ±10kV Across Isolation Barrier
- Ambient Operation from –40°C to 125°C
- Low Profile 15mm × 11.25mm BGA Package
Typical Application
Description
The LTM2889 is a complete galvanically-isolated Controller Area Network (CAN) μModule® (micromodule) transceiver. No external components are required – a single supply powers both sides of the interface through an integrated, isolated DC/DC converter. Separate versions are available for 3.3V and 5V power supplies. The dual voltage CAN transceiver and the adjustable regulator allow 3.3V or 5V isolated power with either the 3.3V or 5V version.
Coupled inductors and an isolation power transformer provide 2500VRMS of isolation between the line transceiver and the logic interface. This device is ideal for systems where the ground loop is broken, allowing for large common mode voltage ranges. Communication remains uninterrupted for common mode transients greater than 30kV/μs.
For more detail: LTM2889 – Isolated CAN FD µModule Transceiver and Power
- Does the LTM2889 require external components?
No external components are required as it includes an integrated isolated DC/DC converter. - What is the isolation voltage rating of the device?
The device provides 2500VRMS isolation for 1 minute per UL1577. - Can the LTM2889 operate with both 3.3V and 5V supplies?
Yes, separate versions are available for 3.3V and 5V input supply voltages. - How much isolated power output does the module provide?
It offers up to 150mA of available isolated power output. - What is the maximum common mode transient immunity?
The device maintains communication for common mode transients greater than 30kV/µs. - Is the LTM2889 compliant with CAN FD standards?
Yes, it is fully ISO 11898-2 and CAN FD compliant. - What is the ambient operating temperature range?
The device operates from –40°C to 125°C. - Does the device have low power consumption in OFF mode?
Yes, it features a low power OFF mode with typical consumption less than 1µA.
