Overview
The LTM2881HY-5 from Analog Devices Inc. is a complete galvanically isolated full-duplex RS485/RS422 μModule (micromodule) transceiver. This device integrates an isolated DC/DC converter, eliminating the need for external components. It is designed to provide reliable and isolated communication in various industrial and networking applications. The LTM2881HY-5 supports data rates up to 20 Mbps and is compatible with TIA/EIA-485-A and PROFIBUS standards. It features high common mode transient immunity and is suitable for systems requiring isolation and robust signal integrity.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | LTM2881HY-5 |
| Package | 32-Lead BGA (15mm x 11.25mm x 3.42mm) |
| Number of Channels | 1 |
| Interface Protocol | Isolated RS-422, Isolated RS-485, PROFIBUS |
| Maximum Data Rate | 20 Mbps |
| Supply Voltage - Max | 5.5 V |
| Supply Voltage - Min | 1.62 V |
| Operating Temperature Range | -40°C to 105°C |
| Insulation Rating | 2500 VRMS |
| Common Mode Transient Immunity (CMTI) | 30 kV/μs |
| Isolated Supply Output Current (max) | 125 mA |
| Isolated Supply Output Voltage (min) | 4.75 V |
Key Features
- Galvanically isolated full-duplex RS485/RS422 transceiver
- Integrated isolated DC/DC converter providing 5V output
- No external components required
- High common mode transient immunity (30 kV/μs)
- Supports data rates up to 20 Mbps and slew limited mode (250 kbps)
- Integrated selectable 120Ω termination
- Current limited drivers and thermal shutdown
- High impedance output during internal fault condition
- Low current shutdown mode (< 10 μA)
- Compatible with TIA/EIA-485-A and PROFIBUS standards
Applications
- Industrial networks
- Breaking RS485 ground loops
- Isolated PROFIBUS-DP networks
- Systems requiring isolation and robust signal integrity
- General purpose CMOS isolated channels
Q & A
- What is the primary function of the LTM2881HY-5?
The LTM2881HY-5 is a complete galvanically isolated full-duplex RS485/RS422 μModule transceiver.
- What is the maximum data rate supported by the LTM2881HY-5?
The LTM2881HY-5 supports data rates up to 20 Mbps.
- What is the insulation rating of the LTM2881HY-5?
The insulation rating is 2500 VRMS.
- Does the LTM2881HY-5 require external components?
No, the LTM2881HY-5 does not require external components as it integrates an isolated DC/DC converter.
- What is the common mode transient immunity (CMTI) of the LTM2881HY-5?
The CMTI is 30 kV/μs.
- What are the operating temperature ranges for the LTM2881HY-5?
The operating temperature range is -40°C to 105°C.
- Is the LTM2881HY-5 compatible with any specific standards?
Yes, it is compatible with TIA/EIA-485-A and PROFIBUS standards.
- What is the package type of the LTM2881HY-5?
The package type is a 32-Lead BGA (15mm x 11.25mm x 3.42mm).
- Does the LTM2881HY-5 have any built-in protection features?
Yes, it includes current limited drivers and thermal shutdown.
- What is the typical application of the LTM2881HY-5?
Typical applications include industrial networks, breaking RS485 ground loops, and isolated PROFIBUS-DP networks.
