ADM2587EBRWZ - 2.5kV Isolated RS-485 Transceiver | Analog Devices
MPN: ADM2587EBRWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.11 | $7.11 |
| 10 | $6.4 | $64.00 |
| 100 | $5.69 | $569.00 |
| 500 | $5.12 | $2,560.00 |
| 1,000 | $4.62 | $4,620.00 |
ADM2587EBRWZ Overview
An isolated RS-485 transceiver is a device that combines a differential bus transceiver with galvanic isolation, typically using magnetic or capacitive coupling, to protect the host system from ground loops, voltage spikes, and noise on the communication bus. It is a critical component in industrial automation, building control, and instrumentation systems where long cable runs and harsh electrical environments are common. The isolation barrier separates the logic side from the bus side, preventing dangerous voltages from reaching the microcontroller or other sensitive circuitry.
Key features of the ADM2587EBRWZ include an integrated isolated DC-DC converter that provides a regulated output voltage for the bus side, eliminating the need for an external isolated power supply. The device offers full-duplex and half-duplex operation, with an active-high driver enable and an active-low receiver enable. It also features current limiting and thermal shutdown protection against output short circuits and bus contention. The ±15 kV ESD protection on the bus pins ensures robust operation in harsh industrial environments.
The ADM2587E uses Analog Devices' isoPower technology, which employs high-frequency switching elements to transfer power across the isolation barrier through a transformer. This integrated approach reduces component count and board space compared to discrete isolation solutions. The device is available in a 20-lead wide-body SOIC package (RW-20), which provides excellent thermal performance and is compatible with standard surface-mount assembly processes.
Typical applications include industrial fieldbus networks, building automation systems, HVAC controllers, and remote sensor interfaces. The ADM2587EBRWZ is ideal for systems requiring reliable data communication over long distances with galvanic isolation to protect against ground potential differences and electrical noise.
When designing with the ADM2587EBRWZ, it is important to provide adequate decoupling on both the logic and bus-side power pins. The integrated DC-DC converter requires an external transformer and rectifier diodes, which must be placed close to the device to minimize parasitic inductance. Proper PCB layout is critical to achieve the specified CMTI and ESD performance.
Drop-in alternatives for ADM2587EBRWZ — 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 (same form factor and footprint) — differing in Data Rate, ESD Protection, Supply Voltage, Common-Mode Transient Immunity, Number of Nodes.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADM2587EBRWZ-REEL7
✅ Drop-In✓ In Stock
$6.8409 / Unit
View Datasheet →ADM2582EBRWZ
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ISO3082DW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISL32704EIBZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX14850
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADM2587EBRWZ Specifications
| Type | RS-422, RS-485 Digital Isolator |
| Number of Channels | 2 |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 500 kbps |
| CMTI | 25 kV/µs |
| ESD Protection | ±15 kV |
| Supply Voltage | 3.3 V or 5 V |
| Duplex | Full/Half |
| Package | 20-SOIC (0.295", 7.50mm Width) |
| Operating Temperature | -40°C to +85°C |
| Integrated DC-DC | Yes |
| Driver Enable | Active High |
| Receiver Enable | Active Low |
| Current Limiting | Yes |
| Thermal Shutdown | Yes |
| RoHS | Compliant |
ADM2587EBRWZ Pin Configuration
| Pin 1 | VCC — Logic side power supply (3.3V or 5V) |
| Pin 2 | GND1 — 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 | A — Non-inverting bus line |
| Pin 8 | B — Inverting bus line |
| Pin 9 | GND2 — Bus side ground |
| Pin 10 | VISO — Isolated power output |
| Pin 11 | VISO — Isolated power output |
| Pin 12 | GND2 — Bus side ground |
| Pin 13 | B — Inverting bus line |
| Pin 14 | A — Non-inverting bus line |
| Pin 15 | RE — Receiver enable (active low) |
| Pin 16 | DE — Driver enable (active high) |
| Pin 17 | RXD — Receive data output |
| Pin 18 | TXD — Transmit data input |
| Pin 19 | GND1 — Logic side ground |
| Pin 20 | VCC — Logic side power supply |
Typical Applications
ADM2587EBRWZ is suitable for 6 applications: Industrial Fieldbus Networks, Building Automation Systems, HVAC Controllers, Remote Sensor Interfaces, Power Utility Monitoring, Transportation Systems.
Industrial Fieldbus Networks
The ADM2587EBRWZ is ideal for industrial fieldbus networks like Modbus and Profibus. Its 2.5 kV isolation protects against ground loops and voltage spikes, while the 500 kbps data rate supports reliable communication over long cable runs. The integrated DC-DC converter simplifies power supply design, reducing component count and board space. In a typical Modbus RTU network, the ADM2587EBRWZ can be placed at each node to isolate the bus from the controller, ensuring robust operation in electrically noisy environments. The ±15 kV ESD protection on the bus pins further enhances reliability in industrial settings.
Recommended
Building Automation Systems
In building automation, the ADM2587EBRWZ provides galvanic isolation for BACnet MS/TP and LonWorks networks. Its 2.5 kV isolation prevents ground potential differences between floors and equipment, ensuring reliable communication. The integrated DC-DC converter allows operation from a single 5V supply, simplifying power distribution in HVAC controllers and lighting systems. The wide operating temperature range of -40°C to +85°C makes it suitable for rooftop units and outdoor sensors. The 500 kbps data rate is sufficient for building control protocols, and the ±15 kV ESD protection ensures longevity in installations with frequent maintenance.
Recommended
HVAC Controllers
The ADM2587EBRWZ is well-suited for HVAC controllers that communicate over RS-485 buses. Its integrated isolation and DC-DC converter reduce external component count, making it ideal for space-constrained controller boards. The 500 kbps data rate supports real-time monitoring and control of temperature, humidity, and airflow. The device's robust ESD protection and high CMTI ensure reliable operation in environments with frequent motor switching and electromagnetic interference. By isolating the bus side from the logic side, the ADM2587EBRWZ protects the microcontroller from voltage transients caused by long cable runs and inductive loads.
Recommended
Remote Sensor Interfaces
For remote sensor interfaces, the ADM2587EBRWZ provides isolated RS-485 communication between sensors and a central controller. Its 2.5 kV isolation protects sensitive measurement circuitry from ground loops and noise, ensuring accurate data transmission. The integrated DC-DC converter allows the sensor node to be powered from the bus, simplifying wiring in distributed systems. The 500 kbps data rate is adequate for most sensor data, and the wide temperature range supports outdoor installations. The ±15 kV ESD protection is crucial for sensors exposed to electrostatic discharge in industrial environments.
Recommended
Power Utility Monitoring
In power utility monitoring, the ADM2587EBRWZ enables isolated communication between substation equipment and control systems. Its 2.5 kV isolation is essential for safety in high-voltage environments, preventing dangerous voltages from reaching the control room. The integrated DC-DC converter simplifies power supply design, and the 500 kbps data rate supports real-time monitoring of voltage, current, and power quality. The device's high CMTI ensures reliable operation in the presence of switching transients from power equipment. The wide operating temperature range makes it suitable for outdoor substations.
Recommended
Transportation Systems
The ADM2587EBRWZ is used in transportation systems for communication between trackside equipment and control centers. Its 2.5 kV isolation protects against ground potential differences in railway and traffic control installations. The 500 kbps data rate supports signaling and monitoring applications, while the integrated DC-DC converter reduces power supply complexity. The device's robust ESD protection and wide temperature range ensure reliable operation in outdoor environments with exposure to vibration and temperature extremes. The high CMTI is critical for maintaining data integrity in the presence of electromagnetic interference from traction power systems.
Recommended
Recommended Products Summary
Engineering reference data for ADM2587EBRWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADM2587EBRWZ-REEL7 | ADM2582EBRWZ | ISO3082DW | ISL32704EIBZ | MAX14850 |
|---|---|---|---|---|---|---|
| Package | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) - same | 20-SOIC (0.295", 7.50mm Width) - same | 20-SOIC (0.295", 7.50mm Width) - same | 20-SOIC (0.295", 7.50mm Width) - same | 20-SOIC (0.295", 7.50mm Width) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Renesas Electronics | Maxim Integrated |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 20 Mbps | 40 Mbps | 20 Mbps |
| Integrated DC-DC | Yes | Yes | Yes | No | No | No |
| Duplex | Full/Half | Full/Half | Half | Full/Half | Full/Half | Full/Half |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±16 kV | ±15 kV | ±15 kV |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +125°C | -40°C to +85°C |
Key Differentiators
- Integrated DC-DC converter (vs ISO3082DW)
- Full-duplex operation (vs ADM2582EBRWZ)
- Higher data rate (vs ADM2483BRWZ)
Design Notes
Place the external transformer and rectifier diodes for the integrated DC-DC converter as close to the ADM2587EBRWZ as possible to minimize parasitic inductance. Use a dedicated ground plane for the bus side and logic side, and ensure a clean separation between the two grounds to maintain the isolation barrier. Follow the layout guidelines in the ADM2587E datasheet (Rev. H) for optimal CMTI and ESD performance.
Provide adequate decoupling on both VCC and VISO pins. Use a 10 µF electrolytic capacitor in parallel with a 0.1 µF ceramic capacitor on each supply pin. The integrated DC-DC converter can draw high peak currents, so ensure the input supply can handle the transient load. Refer to the datasheet for recommended capacitor values and placement.
Do not exceed the absolute maximum ratings for VCC and VISO. Ensure the bus side is properly terminated with 120 Ω resistors at both ends of the cable to prevent reflections. The RE pin is active low; leaving it unconnected may cause the receiver to be disabled. Always connect DE and RE to appropriate logic levels to avoid bus contention.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Halogen-free status not specified in provided data.
