ADM2587EBRWZ-REEL7 - Isolated RS-485 Transceiver | Analog Devices
MPN: ADM2587EBRWZ-REEL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.7273 | $11.73 |
| 10 | $8.4697 | $84.70 |
| 100 | $7.4924 | $749.24 |
| 500 | $7.1667 | $3,583.35 |
| 1,000 | $6.8409 | $6,840.90 |
ADM2587EBRWZ-REEL7 Overview
An isolated RS-485 transceiver is a type of interface IC that combines a differential line driver and receiver with galvanic isolation, protecting the host system from ground loops, common-mode voltages, and electrical noise. It sits within the hierarchy of interface ICs, specifically under RS-485/RS-422 transceivers, which are part of the broader category of serial communication interfaces. The integrated DC-DC converter and signal isolation in a single package simplify PCB design and reduce board space compared to discrete isolation solutions.
Key features include 2500 Vrms isolation, ±15 kV ESD protection on the RS-485 pins, high common-mode transient immunity of >25 kV/µs, and compliance with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). The device supports up to 256 nodes on one bus, has open- and short-circuit fail-safe receiver inputs, and includes thermal shutdown protection. The wide-body 20-lead SOIC package (0.295" width) is suitable for industrial temperature ranges.
Technically, the ADM2587E uses Analog Devices' isoPower technology, which integrates a push-pull DC-DC converter with a transformer-based isolation barrier, providing isolated power and data in one chip. The transceiver features a full-duplex or half-duplex operation, with a driver enable pin and receiver enable pin for bus control. The high CMTI ensures reliable operation in noisy industrial environments where fast voltage transients occur.
Typical applications include industrial fieldbus networks, building automation systems, HVAC controllers, and remote sensor data acquisition. The integrated isolation and power make it ideal for systems where ground potential differences exist between nodes, such as in motor drives and power inverters.
When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier, and place decoupling capacitors close to the VCC and VISO pins. The integrated DC-DC converter requires an external transformer and rectifier circuit, as specified in the datasheet, to generate the isolated supply voltage.
Drop-in alternatives for ADM2587EBRWZ-REEL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADM2587EBRWZ-REEL7 (same form factor and footprint) — differing in Supply Voltage, Data Rate, ESD Protection, Common-Mode Transient Immunity, Isolation Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADM2587EBRWZ
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View Datasheet →ADM2582EBRWZ
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View Datasheet →ADM2483BRWZ
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View Datasheet →ADM2483BRWZ-RL7
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View Datasheet →ADM2582EBRWZ-REEL7
📋 Reference alternative (not in catalog)
ADM2587EBRWZ-REEL7 Specifications
| Isolation Voltage | 2500 Vrms |
| ESD Protection | ±15 kV (HBM) |
| Data Rate | 500 kbps |
| Common-Mode Transient Immunity | >25 kV/µs |
| Supply Voltage | 3.3 V or 5 V |
| Number of Nodes | 256 |
| Duplex | Full/Half |
| Fail-Safe | Open and short circuit |
| Thermal Shutdown | Yes |
| Package | 20-SOIC (0.295", 7.50mm Width) |
| Operating Temperature | -40°C to +85°C |
| Standards | ANSI/TIA/EIA-485-A-98, ISO 8482:1987(E) |
| RoHS | Compliant |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
ADM2587EBRWZ-REEL7 Pin Configuration
| Pin 1 | VCC — Logic side power supply (3.3V or 5V) |
| Pin 2 | GND — Logic side ground |
| Pin 3 | TXD — Transmit data input |
| Pin 4 | RXD — Receive data output |
| Pin 5 | DE — Driver enable (active high) |
| Pin 6 | RE — Receiver enable (active low) |
| Pin 7 | VISO — Isolated power output |
| Pin 8 | GNDISO — Isolated ground |
| Pin 9 | A — Non-inverting bus pin |
| Pin 10 | B — Inverting bus pin |
| Pin 11 | Y — Driver output (non-inverting) |
| Pin 12 | Z — Driver output (inverting) |
Typical Applications
ADM2587EBRWZ-REEL7 is suitable for 6 applications: Industrial Fieldbus Networks, Building Automation Systems, Motor Drives and Power Inverters, Remote Sensor Data Acquisition, HVAC Controllers, Test and Measurement Equipment.
Industrial Fieldbus Networks
The ADM2587EBRWZ-REEL7 is ideal for industrial fieldbus networks such as PROFIBUS and Modbus, where robust communication over long distances is required. Its integrated isolation and ±15 kV ESD protection ensure reliable operation in harsh factory environments with ground potential differences. The 500 kbps data rate is sufficient for most fieldbus protocols, and the 256-node capability supports large networks. The high CMTI (>25 kV/µs) prevents data corruption from fast transients caused by motor drives and other industrial equipment.
Recommended
Building Automation Systems
In building automation, the ADM2587EBRWZ-REEL7 provides isolated RS-485 communication for HVAC controllers, lighting systems, and access control panels. The integrated DC-DC converter simplifies power supply design, reducing board space and cost. The wide operating temperature range (-40°C to +85°C) ensures reliable operation in rooftop units and outdoor sensors. The fail-safe receiver inputs guarantee a defined output state even when the bus is open or shorted, enhancing system reliability.
Recommended
Motor Drives and Power Inverters
The ADM2587EBRWZ-REEL7 is well-suited for motor drives and power inverters where high common-mode transients and ground loops are prevalent. The 2500 Vrms isolation protects the control electronics from high-voltage transients, while the >25 kV/µs CMTI ensures data integrity during switching events. The integrated power isolation eliminates the need for a separate isolated DC-DC converter, simplifying the BOM and improving reliability. The ±15 kV ESD protection on the bus pins adds robustness in industrial environments.
Recommended
Remote Sensor Data Acquisition
For remote sensor data acquisition systems, the ADM2587EBRWZ-REEL7 provides isolated RS-485 communication between sensors and a central controller. The integrated isolation prevents ground loops that can corrupt analog sensor readings. The 500 kbps data rate is adequate for streaming sensor data, and the 256-node capability allows many sensors on a single bus. The wide temperature range and high ESD protection make it suitable for outdoor and industrial sensor networks.
Recommended
HVAC Controllers
The ADM2587EBRWZ-REEL7 is used in HVAC controllers to communicate with thermostats, dampers, and other building management devices. The integrated isolation protects the controller from voltage spikes caused by inductive loads like fans and compressors. The fail-safe receiver inputs ensure that the system defaults to a safe state if the bus is disconnected. The compact 20-SOIC package and integrated DC-DC converter reduce PCB area, which is critical in space-constrained controller designs.
Recommended
Test and Measurement Equipment
In test and measurement equipment, the ADM2587EBRWZ-REEL7 provides isolated RS-485 interfaces for connecting instruments to a host PC or network. The high CMTI and ESD protection ensure accurate data transfer in electrically noisy lab environments. The integrated power isolation simplifies the power supply design, allowing the instrument to be powered from a single rail. The 500 kbps data rate is sufficient for most instrument control and data logging applications.
Recommended
Recommended Products Summary
Engineering reference data for ADM2587EBRWZ-REEL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADM2587EBRWZ | ADM2582EBRWZ | ADM2582EBRWZ-REEL7 | ADM2483BRWZ |
|---|---|---|---|---|---|
| Package | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 500 kbps | 500 kbps |
| Duplex | Full/Half | Full/Half | Half | Half | Half |
| Integrated DC-DC | Yes | Yes | Yes | Yes | No |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV |
| CMTI | >25 kV/µs | >25 kV/µs | >25 kV/µs | >25 kV/µs | >25 kV/µs |
Key Differentiators
- Integrated power isolation (vs ADM2483BRWZ)
- Full-duplex capability (vs ADM2582EBRWZ)
- Tape and reel packaging (vs ADM2587EBRWZ)
Design Notes
Ensure proper creepage and clearance distances for the isolation barrier. The ADM2587EBRWZ-REEL7 provides 2500 Vrms isolation, so PCB layout must maintain at least 8 mm creepage between the logic side and bus side to meet safety standards. Place decoupling capacitors (0.1 µF and 10 µF) close to the VCC and VISO pins to ensure stable operation of the integrated DC-DC converter.
The integrated DC-DC converter requires an external transformer and rectifier circuit as specified in the datasheet. Use a transformer with appropriate isolation rating and a rectifier with fast recovery diodes to minimize ripple. The VISO output should be decoupled with a 10 µF capacitor to maintain stable isolated power for the bus side.
Do not exceed the absolute maximum ratings for supply voltage and bus voltage. The ADM2587EBRWZ-REEL7 is designed for 3.3V or 5V operation; applying higher voltages can damage the device. Also, ensure the bus termination resistors are properly matched to the cable impedance to avoid signal reflections and data errors.
Compliance Information
RoHS compliant per distributor data. Other compliance info not specified in provided data.
