ADM2487EBRWZ - Isolated RS-485 Transceiver | Analog Devices
N.º de pieza: ADM2487EBRWZ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.5 | $6,50 |
| 10 | $5.85 | $58,50 |
| 100 | $5.2 | $520,00 |
| 500 | $4.68 | $2.340,00 |
| 1.000 | $4.16 | $4.160,00 |
ADM2487EBRWZ Descripción general
An isolated RS-485 transceiver is a component that combines a differential line driver and receiver with galvanic isolation, allowing data transmission between systems with different ground potentials. It is a key element in industrial automation, building control, and instrumentation networks, where it ensures signal integrity and protects against ground loops and voltage transients. The ADM2487E belongs to the family of isolated interface ICs, which are part of the broader category of digital isolators and interface transceivers.
Key features include an integrated oscillator driver for an external transformer, eliminating the need for a separate DC-DC converter, and a 3-channel architecture (one driver, one receiver, and one isolation channel). The device operates from a 5V supply on the logic side and a 5V supply on the bus side, with a typical quiescent current of 2.5 mA. It also features thermal shutdown and short-circuit protection on the driver outputs.
The ADM2487E uses Analog Devices' iCoupler technology, which integrates micro-transformers to provide isolation, resulting in a compact and reliable solution compared to optocoupler-based designs. The high CMTI of 25 kV/µs ensures reliable operation in noisy industrial environments, and the ±15 kV ESD protection on the bus pins enhances robustness against electrostatic discharge.
Typical applications include industrial fieldbus networks (PROFIBUS, Modbus), building automation (HVAC, lighting control), and instrumentation systems where long cable runs and ground potential differences are common. The device's half-duplex capability allows it to be used in 2-wire RS-485 networks, while full-duplex operation supports 4-wire configurations.
When designing with the ADM2487E, ensure proper PCB layout with adequate spacing for isolation, and place the external transformer close to the device to minimize parasitic inductance. Also, terminate the bus properly to avoid reflections and ensure reliable communication at 500 kbps.
Alternativas directas para ADM2487EBRWZ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ADM2487EBRWZ (mismo factor de forma y huella) — difiere en Isolation Voltage, Data Rate, Package, ESD Protection, Supply Voltage (Logic Side).
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADM2487EBRWZ-REEL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADM2482EBRWZ
✅ Sustitución directa✓ En stock
$10.65 / unidad
Ver hoja de datos →ADM2483BRWZ
✅ Sustitución directa✓ En stock
$3.8182 / unidad
Ver hoja de datos →ADM2484EBRWZ
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$3.1 / unidad
Ver hoja de datos →ISO3082DW
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ADM2487EBRWZ Especificaciones
| Type | Isolated RS-485/RS-422 Transceiver |
| Isolation Voltage | 2500 Vrms |
| Number of Channels | 3 |
| Velocidad de datos | 500 kbps |
| CMTI | 25 kV/µs |
| ESD Protection | ±15 kV (HBM) |
| Supply Voltage (Logic Side) | 5 V |
| Supply Voltage (Bus Side) | 5 V |
| Corriente en reposo | 2.5 mA (typical) |
| Rango de temperatura de funcionamiento | -40°C to +85°C |
| Encapsulado | 16-SOIC (0.295", 7.50mm Width) |
| Tipo de montaje | Surface Mount |
| Duplex | Half/Full |
| Integrated Transformer Driver | Yes |
| Estado RoHS | Compliant |
Configuración de pines de ADM2487EBRWZ
| Pin 1 | VDD1 — Logic side supply voltage (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 | NC — No connect |
| Pin 8 | NC — No connect |
| Pin 9 | VDD2 — Bus side supply voltage (5V) |
| Pin 10 | GND2 — Bus side ground |
| Pin 11 | A — Non-inverting receiver input / driver output |
| Pin 12 | B — Inverting receiver input / driver output |
| Pin 13 | Y — Non-inverting driver output |
| Pin 14 | Z — Inverting driver output |
| Pin 15 | VISO — Isolated supply output (from transformer) |
| Pin 16 | GNDISO — Isolated ground |
Aplicaciones típicas
ADM2487EBRWZ es adecuado para 6 aplicacións: Industrial Fieldbus Networks, Building Automation, Instrumentation and Data Acquisition, Motor Control and Drives, Power Grid Monitoring, Transportation and Rail.
Industrial Fieldbus Networks
The ADM2487EBRWZ is ideal for industrial fieldbus networks such as Modbus and PROFIBUS, where reliable communication over long distances and harsh environments is critical. Its 2.5 kVrms isolation protects against ground potential differences, while the 500 kbps data rate supports standard fieldbus protocols. The integrated transformer driver simplifies power supply design, reducing component count and board space. With ±15 kV ESD protection and 25 kV/µs CMTI, it ensures robust operation in electrically noisy industrial settings.
Recomendado
Building Automation
In building automation systems, the ADM2487EBRWZ enables reliable communication between HVAC controllers, lighting systems, and security panels over RS-485 buses. Its isolation capability prevents ground loops that can occur when devices are powered from different phases or distant locations. The half-duplex mode supports 2-wire bus topologies, reducing cabling costs. The device's wide operating temperature range (-40°C to +85°C) makes it suitable for rooftop units and other outdoor installations.
Recomendado
Instrumentation and Data Acquisition
The ADM2487EBRWZ is used in instrumentation systems to transmit measurement data from sensors and data acquisition modules to central controllers. Its high CMTI (25 kV/µs) ensures accurate data transfer even when large common-mode voltage transients are present, such as those caused by motor starts or switching power supplies. The integrated transformer driver allows for a compact isolated power supply, which is beneficial in space-constrained designs. The device's full-duplex capability supports simultaneous data transmission and reception, enabling real-time monitoring.
Recomendado
Motor Control and Drives
In motor control applications, the ADM2487EBRWZ provides isolated communication between the motor drive controller and the fieldbus network. The isolation protects the low-voltage control circuitry from high-voltage transients generated by the motor. The device's robustness against ESD and high CMTI ensures reliable operation in the presence of electromagnetic interference. The half-duplex mode is commonly used in daisy-chained motor drives, simplifying wiring. The integrated transformer driver reduces the need for an external isolated DC-DC converter, saving board space and cost.
Recomendado
Power Grid Monitoring
The ADM2487EBRWZ is suitable for power grid monitoring systems where isolation is essential to protect personnel and equipment from high voltages. It enables communication between remote terminal units (RTUs) and central control systems over RS-485 links. The device's 2.5 kVrms isolation rating provides a safety barrier, and its high CMTI ensures reliable data transmission in the presence of power line transients. The wide temperature range allows operation in outdoor substations.
Recomendado
Transportation and Rail
In transportation systems, the ADM2487EBRWZ is used for communication between train control units, signaling systems, and passenger information displays. Its isolation capability prevents ground loops that can occur due to long cable runs and different power supplies. The device's robustness against ESD and high CMTI ensures reliable operation in the harsh electromagnetic environment of railway applications. The half-duplex mode is suitable for bus-based communication between multiple nodes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADM2487EBRWZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADM2487EBRWZ-REEL7 | ADM2482EBRWZ | ADM2483BRWZ | ADM2484EBRWZ | ISO3082DW |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (same) | 16-SOIC (same) | 16-SOIC (same) | 16-SOIC (same) | 16-SOIC (same) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 16 Mbps | 500 kbps | 20 Mbps | 200 kbps |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±8 kV | ±15 kV | ±16 kV |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 50 kV/µs |
| Integrated Transformer Driver | Yes | Yes | Yes | No | Yes | No |
| Supply Voltage | 5V | 5V | 5V | 5V | 5V | 5V |
Diferenciadores clave
- Integrated transformer driver (frente a ADM2483BRWZ)
- Higher ESD protection (frente a ADM2483BRWZ)
- Higher data rate than ISO3082 (frente a ISO3082DW)
Notas de diseño
For the ADM2487EBRWZ, maintain a minimum creepage distance of 8 mm between the logic side (pins 1-8) and bus side (pins 9-16) to meet the 2.5 kVrms isolation rating. Use a PCB with adequate clearance and avoid placing copper traces under the device. Place the external transformer close to the VISO and GNDISO pins to minimize parasitic inductance and ensure stable isolated power.
The ADM2487EBRWZ requires a 5V supply on both VDD1 and VDD2. The integrated transformer driver generates an isolated supply (VISO) using an external transformer and rectifier. Ensure the transformer has a suitable turns ratio (e.g., 1:1) and that the rectifier diodes and capacitors are rated for the required current. The typical quiescent current is 2.5 mA, but the bus side may draw more during transmission.
For RS-485 networks, terminate the bus with 120-ohm resistors at both ends to prevent reflections. Place the termination resistors close to the connector. Use twisted-pair cabling for the A and B lines. The ADM2487E's high CMTI (25 kV/µs) helps reject common-mode noise, but proper grounding and shielding are still recommended for long cable runs.
Información de cumplimiento
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
