ADM2486BRWZ - 20Mbps Isolated RS-485 Transceiver | Analog Devices
部品番号: ADM2486BRWZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.2 | $42.00 |
| 100 | $3.7 | $370.00 |
| 500 | $3.3 | $1,650.00 |
| 1,000 | $3 | $3,000.00 |
ADM2486BRWZ 概要
An isolated RS-485 transceiver is a component that combines an RS-485 physical layer interface with galvanic isolation, allowing data transmission between systems with different ground potentials while preventing harmful ground loops and common-mode voltage damage. It sits within the hierarchy: isolated RS-485 transceiver -> digital isolator + transceiver -> interface IC -> semiconductor. This integration reduces board space and improves reliability compared to discrete isolator plus transceiver solutions.
Key features include a wide supply voltage range of 3V to 5.5V on the logic side and 5V on the bus side, a 20Mbps data rate, and a -7V to +12V common-mode input voltage range on the bus pins. The device also features thermal shutdown protection, a driver output short-circuit protection, and a receiver with true fail-safe inputs that guarantee a logic-high output when the bus is open, shorted, or idle. The 16-lead SOIC-16 package (7.50mm width) is industry-standard and supports surface-mount assembly.
Technically, the ADM2486 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to provide isolation, eliminating the need for optocouplers and their associated LED aging and current transfer ratio degradation. The device is fully specified over the industrial temperature range of -40°C to +85°C. Its high CMTI of 25kV/µs ensures reliable operation in the presence of fast transients, such as those from motor drives or power converters.
Typical applications include industrial fieldbus networks, PROFIBUS, Modbus, building automation, and HVAC systems, where high-speed, isolated RS-485 communication is required. The ADM2486 is also used in motor control and power inverter systems to isolate the controller from the high-voltage bus side.
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 VDD1 and VDD2 pins. The device requires a 5V supply on the bus side (VDD2) and can operate with 3.3V or 5V on the logic side (VDD1).
ドロップイン代替品: ADM2486BRWZ — 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: ADM2486BRWZ （同一形状・フットプリント） — 相違点: Isolation Voltage, Package, Data Rate, Number of Channels, Operating Temperature Range.
クイック比較ツール — 並列比較する代替部品を選択:
ADM2486BRWZ-REEL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADM2483BRWZ
✅ ドロップイン✓ 在庫あり
$3.8182 / 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 →ISO1176DW
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ISO1176DWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADM2486BRWZ 仕様
| Type | Isolated RS-485 Transceiver |
| Number of Channels | 3 |
| Isolation Voltage | 2500Vrms |
| データレート | 20Mbps |
| Common-Mode Transient Immunity (CMTI) | 25kV/µs |
| Supply Voltage (Logic Side, VDD1) | 3V to 5.5V |
| Supply Voltage (Bus Side, VDD2) | 5V |
| Common-Mode Input Voltage Range | -7V to +12V |
| Duplex | Half-Duplex |
| ピン数 | 16 |
| パッケージ | SOIC-16 (0.295", 7.50mm Width) |
| 実装タイプ | Surface Mount |
| 動作温度範囲 | -40°C to +85°C |
| Fail-Safe | True (open, short, idle) |
| RoHS ステータス | Compliant |
ADM2486BRWZ ピン構成
| ピン 1 | VDD1 — Logic side supply voltage (3V to 5.5V) |
| ピン 2 | GND1 — Logic side ground |
| ピン 3 | RXD — Receive data output |
| ピン 4 | RXD — Receive data output (duplicate pin) |
| ピン 5 | TXD — Transmit data input |
| ピン 6 | TXD — Transmit data input (duplicate pin) |
| ピン 7 | GND1 — Logic side ground |
| ピン 8 | NC — No connect |
| ピン 9 | A — Bus pin A (non-inverting) |
| ピン 10 | B — Bus pin B (inverting) |
| ピン 11 | GND2 — Bus side ground |
| ピン 12 | Y — Driver output Y (non-inverting) |
| ピン 13 | Z — Driver output Z (inverting) |
| ピン 14 | GND2 — Bus side ground |
| ピン 15 | VDD2 — Bus side supply voltage (5V) |
| ピン 16 | GND2 — Bus side ground |
主な用途
ADM2486BRWZ の用途: 6 件s: Industrial Fieldbus Networks, Building Automation and HVAC, Motor Control and Power Inverters, PROFIBUS DP Networks, Modbus Communication, Test and Measurement Equipment.
Industrial Fieldbus Networks
The ADM2486BRWZ is ideal for industrial fieldbus networks such as PROFIBUS and Modbus, where high-speed (20Mbps) isolated RS-485 communication is required. Its 2500Vrms isolation and 25kV/µs CMTI ensure reliable data transfer in electrically noisy environments, protecting the controller from ground potential differences and transients. The device's half-duplex operation and true fail-safe receiver guarantee robust communication even when the bus is idle or shorted. With a wide supply range on the logic side (3V to 5.5V), it easily interfaces with 3.3V or 5V microcontrollers. The SOIC-16 package allows compact PCB designs, and the integrated isolation eliminates the need for external optocouplers, reducing component count and improving reliability.
おすすめ
Building Automation and HVAC
In building automation systems, the ADM2486BRWZ provides isolated RS-485 communication between HVAC controllers, sensors, and actuators. Its 20Mbps data rate supports fast polling of multiple nodes, while the 2500Vrms isolation protects low-voltage control electronics from surges induced by long cable runs. The device's wide common-mode input range (-7V to +12V) accommodates ground shifts between distributed nodes. The true fail-safe receiver ensures a defined logic state when the bus is idle, preventing false triggering. The industrial temperature range (-40°C to +85°C) suits rooftop and outdoor installations. The integrated isolation simplifies PCB layout and reduces BOM cost compared to discrete solutions.
おすすめ
Motor Control and Power Inverters
The ADM2486BRWZ is used in motor control and power inverter systems to isolate the digital controller from the high-voltage power stage. Its high CMTI of 25kV/µs ensures reliable communication during fast switching transients, preventing data corruption. The 2500Vrms isolation protects the low-voltage side from high common-mode voltages. The 20Mbps data rate allows real-time control commands and feedback. The device's thermal shutdown and short-circuit protection enhance system robustness. The SOIC-16 package is suitable for space-constrained inverter boards. By integrating isolation, the ADM2486 reduces design complexity and improves system reliability compared to optocoupler-based solutions.
おすすめ
PROFIBUS DP Networks
The ADM2486BRWZ is well-suited for PROFIBUS DP networks, which require data rates up to 12Mbps. With a 20Mbps capability, it provides ample margin. The device's 2500Vrms isolation and 25kV/µs CMTI ensure reliable operation in industrial environments with high electromagnetic interference. The half-duplex operation matches PROFIBUS's half-duplex protocol. The true fail-safe receiver ensures a defined state when the bus is idle, which is critical for PROFIBUS's idle detection. The wide supply range on the logic side allows direct interfacing with 3.3V or 5V ASICs and microcontrollers. The SOIC-16 package is standard and easy to assemble. The integrated isolation reduces component count and improves reliability.
おすすめ
Modbus Communication
The ADM2486BRWZ is an excellent choice for Modbus RTU and Modbus TCP networks that use RS-485 physical layers. Its 20Mbps data rate supports high-speed polling of many nodes, while the 2500Vrms isolation protects equipment from ground loops and surges. The device's half-duplex operation is compatible with Modbus's master-slave architecture. The true fail-safe receiver ensures a known state when the bus is idle, preventing false data. The wide common-mode input range (-7V to +12V) handles ground potential differences between nodes. The industrial temperature range makes it suitable for factory floor installations. The integrated isolation simplifies design and reduces BOM cost.
おすすめ
Test and Measurement Equipment
In test and measurement equipment, the ADM2486BRWZ provides isolated RS-485 communication between instruments and a host controller. Its 20Mbps data rate enables fast data transfer, while the 2500Vrms isolation protects sensitive measurement circuits from ground noise and transients. The device's high CMTI ensures accurate data transmission in the presence of electromagnetic interference. The true fail-safe receiver guarantees a defined output when the bus is idle, which is important for reliable data acquisition. The wide supply range on the logic side allows interfacing with various logic levels. The SOIC-16 package is compact and suitable for benchtop instruments. The integrated isolation reduces design complexity and improves measurement accuracy.
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: ADM2486BRWZ — 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 | ADM2486BRWZ-REEL | ADM2483BRWZ | ISO1176DW |
|---|---|---|---|---|
| Package | SOIC-16 | SOIC-16 | SOIC-16 | SOIC-16 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Data Rate | 20Mbps | 20Mbps | 500kbps | 40Mbps |
| Isolation Voltage | 2500Vrms | 2500Vrms | 2500Vrms | 2500Vrms |
| CMTI | 25kV/µs | 25kV/µs | 25kV/µs | 50kV/µs |
| Supply Voltage (Logic) | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V |
| Duplex | Half | Half | Half | Half |
| Fail-Safe | True | True | True | True |
主な差別化要因
- Higher data rate than ADM2483BRWZ （vs ADM2483BRWZ)
- iCoupler technology vs optocoupler （vs ISO1176DW)
- Lower power consumption （vs ISO1176DW)
設計ノート
For the ADM2486BRWZ, maintain proper creepage and clearance distances between the logic side (pins 1-8) and bus side (pins 9-16) to meet isolation ratings. Use a PCB with at least 8mm creepage for 2500Vrms isolation. Place decoupling capacitors (0.1µF and 10µF) close to VDD1 and VDD2 pins. Ensure a solid ground plane on both sides of the isolation barrier, but do not connect GND1 and GND2 together on the PCB.
Route the differential bus lines (A, B, Y, Z) as a twisted pair or with controlled impedance (120Ω) to minimize reflections. Keep the traces short and avoid stubs. Place the termination resistor (120Ω) at the far end of the bus. For high-speed operation at 20Mbps, use differential signaling with proper termination to maintain signal integrity.
Do not exceed the absolute maximum ratings: VDD1 and VDD2 must not exceed 6V. Ensure the bus pins are not subjected to voltages outside -7V to +12V. The device has thermal shutdown, but avoid sustained short circuits. Also, ensure that the logic side supply is stable and within 3V to 5.5V; operation outside this range can cause erratic behavior.
コンプライアンス情報
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated for this part.
