ADM2487EBRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices
部品番号: ADM2487EBRWZ-RL7 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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-RL7 概要
An isolated RS-485 transceiver is a component that combines a differential line transceiver with galvanic isolation, allowing data communication between systems with different ground potentials. It integrates a digital isolator, a transceiver, and often a transformer driver to provide isolated power. This device belongs to the family of interface ICs, specifically digital isolators and bus transceivers, which are essential in industrial automation, building control, and medical equipment to prevent ground loops and protect against voltage transients.
Key features include 2500 Vrms isolation voltage, 500 kbps data rate, 25 kV/µs common-mode transient immunity (CMTI), and ±15 kV ESD protection on the bus pins. The integrated oscillator driver allows the use of an external transformer to generate an isolated power supply, simplifying the design. The device supports both half-duplex and full-duplex configurations, with the transmitter outputs and receiver inputs sharing the same transmission line in half-duplex mode.
Technically, the ADM2487E uses Analog Devices' iCoupler technology to provide isolation, which uses chip-scale transformers to couple signals across the isolation barrier. This results in reliable, high-speed data transfer with low power consumption. The device operates from a single 5V supply on the logic side and a 5V supply on the bus side, with a typical quiescent current of 2.5 mA. The bus pins are protected against ESD up to ±15 kV, ensuring robustness in harsh industrial environments.
Typical applications include industrial fieldbus networks, building automation, HVAC systems, and isolated data acquisition systems. The device is particularly suited for applications requiring reliable communication over long distances (up to 1200 meters) and in noisy environments where galvanic isolation is critical.
When designing with this device, ensure proper PCB layout to minimize parasitic capacitance across the isolation barrier. Use a suitable external transformer with the integrated driver to generate the isolated supply, and place decoupling capacitors close to the power pins. The device is RoHS compliant and available in tape and reel packaging.
ドロップイン代替品: ADM2487EBRWZ-RL7 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADM2487EBRWZ-RL7 （同一形状・フットプリント） — 相違点: Quiescent Current, Supply Voltage (Logic Side), Type.
クイック比較ツール — 並列比較する代替部品を選択:
ADM2487EBRWZ-REEL7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADM2487EBRWZ
✅ ドロップイン✓ 在庫あり
$4.16 / 個
データシートを見る →ADM2483BRWZ-RL7
✅ ドロップイン✓ 在庫あり
$4.16 / 個
データシートを見る →ADM2483BRWZ
✅ ドロップイン✓ 在庫あり
$3.8182 / 個
データシートを見る →ISO3082DW
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MAX14850
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADM2487EBRWZ-RL7 仕様
| Isolation Voltage | 2500 Vrms |
| データレート | 500 kbps |
| Number of Channels | 3 |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| ESD Protection | ±15 kV (HBM) |
| Supply Voltage (Logic Side) | 5 V |
| Supply Voltage (Bus Side) | 5 V |
| 静止電流 | 2.5 mA (typical) |
| 動作温度範囲 | -40°C to +85°C |
| パッケージ | 16-SOIC (0.295", 7.50mm Width) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Duplex Mode | Half/Full |
| Integrated Transformer Driver | Yes |
| Number of Transceivers | 1 |
ADM2487EBRWZ-RL7 ピン構成
| ピン 1 | VDD1 — Logic side supply voltage (5V) |
| ピン 2 | GND1 — Logic side ground |
| ピン 3 | TXD — Transmit data input |
| ピン 4 | RXD — Receive data output |
| ピン 5 | DE — Driver enable (active high) |
| ピン 6 | RE — Receiver enable (active low) |
| ピン 7 | NC — No connect |
| ピン 8 | GND1 — Logic side ground |
| ピン 9 | VDD2 — Bus side supply voltage (5V) |
| ピン 10 | GND2 — Bus side ground |
| ピン 11 | A — Non-inverting bus line |
| ピン 12 | B — Inverting bus line |
| ピン 13 | Y — Driver output (non-inverting) |
| ピン 14 | Z — Driver output (inverting) |
| ピン 15 | GND2 — Bus side ground |
| ピン 16 | VDD2 — Bus side supply voltage (5V) |
主な用途
ADM2487EBRWZ-RL7 の用途: 6 件s: Industrial Fieldbus Networks, Building Automation, Isolated Data Acquisition, Medical Equipment, Transportation Systems, Networking Equipment.
Industrial Fieldbus Networks
The ADM2487EBRWZ-RL7 is ideal for industrial fieldbus networks such as PROFIBUS and Modbus, where reliable, isolated RS-485 communication is required. Its 2500 Vrms isolation and ±15 kV ESD protection ensure robust operation in harsh industrial environments with ground potential differences. The integrated transformer driver simplifies the design of isolated power supplies, reducing component count and board space. With a data rate of 500 kbps, it supports typical fieldbus speeds, and its high CMTI of 25 kV/µs ensures reliable data transfer in the presence of fast transients.
おすすめ
Building Automation
In building automation systems, the ADM2487EBRWZ-RL7 provides isolated RS-485 communication for HVAC controllers, lighting systems, and access control panels. Its 2500 Vrms isolation protects sensitive control electronics from ground loops and voltage surges common in building wiring. The device's half-duplex capability allows multiple nodes to share a single twisted-pair bus, reducing wiring costs. The integrated transformer driver enables a compact isolated power supply, making it suitable for space-constrained controller modules. With a wide operating temperature range of -40°C to +85°C, it operates reliably in unconditioned spaces.
おすすめ
Isolated Data Acquisition
The ADM2487EBRWZ-RL7 is well-suited for isolated data acquisition systems where sensors and data loggers are separated by large ground potential differences. Its 2500 Vrms isolation prevents ground loops that could corrupt analog measurements. The device supports full-duplex communication, enabling simultaneous data transmission and reception for real-time monitoring. The high ESD protection (±15 kV) ensures reliability in industrial environments with electrostatic discharge risks. The integrated transformer driver allows the generation of an isolated supply for the sensor side, simplifying the overall system design.
おすすめ
Medical Equipment
In medical equipment, the ADM2487EBRWZ-RL7 provides galvanic isolation to protect patients and sensitive electronics from electrical hazards. Its 2500 Vrms isolation meets typical medical safety requirements for signal isolation. The device's low quiescent current (2.5 mA) is beneficial for battery-powered or low-power medical devices. The integrated transformer driver reduces the number of external components, which is advantageous in compact medical devices. The wide temperature range and high ESD protection ensure reliable operation in clinical environments.
おすすめ
Transportation Systems
The ADM2487EBRWZ-RL7 is used in transportation systems such as railway signaling and vehicle-to-infrastructure communication, where robust isolated RS-485 links are essential. Its 2500 Vrms isolation protects against voltage transients from traction power systems. The device's high CMTI (25 kV/µs) ensures reliable communication in the presence of electromagnetic interference from motors and power electronics. The integrated transformer driver simplifies the design of isolated power supplies in space-constrained enclosures. With a wide operating temperature range, it operates reliably in outdoor and under-hood environments.
おすすめ
Networking Equipment
In networking equipment, the ADM2487EBRWZ-RL7 provides isolated RS-485 interfaces for management ports and console connections. Its 2500 Vrms isolation protects the main board from surges on external cables. The device supports full-duplex communication, enabling simultaneous transmit and receive for efficient management traffic. The integrated transformer driver allows a compact isolated power supply, reducing board space in dense networking hardware. The high ESD protection ensures reliability in environments where cables may be frequently connected and disconnected.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADM2487EBRWZ-RL7 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADM2487EBRWZ-REEL7 | ADM2487EBRWZ | ADM2483BRWZ-RL7 | ADM2483BRWZ | ISO3082DW | MAX14850 |
|---|---|---|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Maxim Integrated |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 500 kbps | 500 kbps | 200 kbps | 500 kbps |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±16 kV | ±15 kV |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Integrated Transformer Driver | Yes | Yes | Yes | No | No | No | No |
| Duplex Mode | Half/Full | Half/Full | Half/Full | Half/Full | Half/Full | Half/Full | Half/Full |
主な差別化要因
- Integrated transformer driver simplifies isolated power design （vs ADM2483BRWZ-RL7)
- Higher data rate than some cross-brand alternatives （vs ISO3082DW)
- Same-brand family compatibility （vs MAX14850)
設計ノート
For optimal isolation performance, maintain a clean separation between the logic side (VDD1/GND1) and bus side (VDD2/GND2) on the PCB. Avoid routing traces across the isolation barrier, and ensure the isolation gap is at least 8 mm to meet the 2500 Vrms rating. Place decoupling capacitors (0.1 µF and 10 µF) close to each supply pin.
The integrated transformer driver requires an external transformer to generate the isolated supply. Choose a transformer with a turns ratio suitable for the desired output voltage (typically 1:1 for 5V to 5V). Ensure the transformer's isolation rating exceeds the required 2500 Vrms. Add a rectifier and filter capacitor on the secondary side to produce a clean DC supply.
Do not exceed the absolute maximum ratings for supply voltage (6V) or bus voltage. Ensure proper termination (120 Ω) on the RS-485 bus to prevent reflections. For half-duplex operation, connect Y to A and Z to B externally. Verify the enable pins (DE and RE) are correctly driven to avoid bus contention.
コンプライアンス情報
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Halogen-free status not specified in available data.