ADM2587EBRWZ - 2.5kV Isolated RS-485 Transceiver | Analog Devices
MPN: ADM2587EBRWZ ✓ פעילADM2587EBRWZ סקירה
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.
חלופות תחליף ישיר עבור ADM2587EBRWZ — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ADM2587EBRWZ (אותו גורם צורה וטביעת רגל) — שונים ב Data Rate, ESD Protection, Supply Voltage, Common-Mode Transient Immunity, Number of Nodes.
ADM2587EBRWZ-REEL7
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADM2582EBRWZ
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ISO3082DW
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ISL32704EIBZ
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MAX14850
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ADM2587EBRWZ מפרטים
| Type | RS-422, RS-485 Digital Isolator |
| Number of Channels | 2 |
| Isolation Voltage | 2500 Vrms |
| קצב נתונים | 500 kbps |
| CMTI | 25 kV/µs |
| ESD Protection | ±15 kV |
| מתח אספקה | 3.3 V or 5 V |
| Duplex | Full/Half |
| מארז | 20-SOIC (0.295", 7.50mm Width) |
| טמפרטורת פעולה | -40°C to +85°C |
| Integrated DC-DC | Yes |
| Driver Enable | Active High |
| Receiver Enable | Active Low |
| Current Limiting | Yes |
| כיבוי תרמי | Yes |
| RoHS | Compliant |
תצורת פינים של ADM2587EBRWZ
| פין 1 | VCC — Logic side power supply (3.3V or 5V) |
| פין 2 | GND1 — Logic side ground |
| פין 3 | TXD — Transmit data input |
| פין 4 | RXD — Receive data output |
| פין 5 | DE — Driver enable (active high) |
| פין 6 | RE — Receiver enable (active low) |
| פין 7 | A — Non-inverting bus line |
| פין 8 | B — Inverting bus line |
| פין 9 | GND2 — Bus side ground |
| פין 10 | VISO — Isolated power output |
| פין 11 | VISO — Isolated power output |
| פין 12 | GND2 — Bus side ground |
| פין 13 | B — Inverting bus line |
| פין 14 | A — Non-inverting bus line |
| פין 15 | RE — Receiver enable (active low) |
| פין 16 | DE — Driver enable (active high) |
| פין 17 | RXD — Receive data output |
| פין 18 | TXD — Transmit data input |
| פין 19 | GND1 — Logic side ground |
| פין 20 | VCC — Logic side power supply |
יישומים טיפוסיים
ADM2587EBRWZ מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ADM2587EBRWZ — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Integrated DC-DC converter (לעומתISO3082DW)
- Full-duplex operation (לעומתADM2582EBRWZ)
- Higher data rate (לעומתADM2483BRWZ)
הערות תכנון
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.
מידע על תאימות
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Halogen-free status not specified in provided data.
