LTC2862AHDD-2#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2862AHDD-2#TRPBF is a low-power, half-duplex RS485/RS422 transceiver manufactured by Analog Devices Inc. It operates on a 3V to 5.5V supply and supports data rates up to 20Mbps or slew-rate limited transmission at 250kbps for reduced EMI. The device features ±60V overvoltage fault protection on interface pins during all modes, including power-down. It provides Level 4 IEC ESD protection and ±40kV HBM protection on the A and B pins. The component utilizes an 8-lead (3mm × 3mm) Plastic DFN package with an exposed pad connected to GND.

Drivers, Receivers, Transceivers Feature Summary

• Integrated ±60V overvoltage fault protection on interface pins across all operational states
• Robust ESD immunity with ±40kV HBM and Level 4 IEC ESD/EFT ratings on bus lines
• Extended common mode range of ±25V for reliable operation in high ground loop environments
• Fully balanced differential receiver thresholds ensuring low duty cycle distortion

Drivers, Receivers, Transceivers Applications

• Supervisory Control and Data Acquisition (SCADA)
• Industrial control and instrumentation networks
• Automotive and transportation electronics
• Building automation, security systems, and HVAC
• Medical equipment

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix #TRPBF corresponds to tape and reel packaging when sourcing components. Confirm that the AH grade designation matches the required -40°C to +125°C operating temperature range for the target application environment. Ensure the DFN package footprint aligns with the PCB layout specifications provided in the datasheet.

Drivers, Receivers, Transceivers Selection Notes

Select the LTC2862A-2 variant specifically for applications requiring low EMI characteristics due to its 250kbps slew-rate limited data rate option. Verify compatibility with existing RS485/RS422 network protocols. Consider the extended common mode voltage tolerance if significant ground potential differences exist between nodes. Ensure the system design accommodates the thermal requirements associated with the DFN package.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2862A family of robust RS485/RS422 transceivers. It serves as an improved version of the LTC2862, offering enhanced signal integrity and noise immunity. The device is pin-compatible with the original LTC2862 and LT1785, facilitating direct upgrades in existing designs without requiring schematic modifications.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2862AIDD-2#TRPBF

Drivers, Receivers, Transceivers FAQ

How does the failsafe mechanism function in the LTC2862A-2?

The LTC2862A-2 uses a window comparator to detect when the differential input voltage falls below the failsafe threshold but above the negative receiver threshold. If this condition persists for approximately 1.2µs, the receiver output is forced to a logic 1 state.

What is the maximum short-circuit current allowed for the driver?

The driver outputs are protected against short circuits to any voltage within the -60V to +60V range, with a maximum fault current of ±250mA. The device employs progressive foldback current limiting to reduce this current at higher fault voltages.

Does the device maintain fault protection when powered down?

Yes, the LTC2862A provides ±60V overvoltage fault protection on the interface pins even when the device is unpowered or in shutdown mode.