MAX14882AWE+T - 5kVRMS Isolated CAN Transceiver | Analog Devices
部品番号: MAX14882AWE+T ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $8.96 | $8.96 |
| 10 | $8.45 | $84.50 |
| 100 | $7.78 | $778.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.21 | $6,210.00 |
MAX14882AWE+T 概要
What is an isolated CAN transceiver? A CAN (Controller Area Network) transceiver is the physical-layer interface between a digital CAN protocol controller and the differential CAN bus cables. An "isolated" variant adds a galvanic isolation barrier (here, 5kVRMS) that breaks ground loops, rejects common-mode transients, and protects low-voltage microcontrollers from high-voltage faults on the industrial CAN bus. The MAX14882 sits in the product hierarchy: CAN transceiver -> automotive/industrial transceiver -> isolated interface IC -> power management and signal conditioning IC family.
Key features include a ±25V receiver input common-mode range (exceeding the ISO 11898-2 requirement of -2V to +7V), ±54V fault tolerance on CANH/CANL, ±15kV HBM ESD protection on bus-side pins to GNDB, an integrated transformer driver with LDO that supplies VDDB from an external transformer, and a POL (polarity) pin that swaps CANH/CANL functions for software correction of cross-wired bus cables. The integrated isolation eliminates the need for a discrete digital isolator plus an external isolated DC/DC supply, reducing BOM count and PCB footprint by roughly 50%.
Typical applications include industrial automation networks (CANopen, DeviceNet), building automation HVAC controllers, solar inverter inter-module communication, electric vehicle battery management systems (CAN-FD ready), and any microcontroller-to-bus interface requiring robust galvanic isolation in harsh electrical environments.
When designing with this part, place decoupling capacitors (typically 100nF plus 10µF) on both VDDA and VDDB as close to the IC as possible, and route the external transformer primary traces symmetrically. The integrated LDO can source up to 300mA for auxiliary circuits after supplying the internal 130mA MAX14882 load, but derate at high bus-side temperatures.
ドロップイン代替品: MAX14882AWE+T — 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: MAX14882AWE+T （同一形状・フットプリント） — 相違点: Package, Function, Operating Temperature, Protocol, Isolation Voltage.
クイック比較ツール — 並列比較する代替部品を選択:
MAX14882AWE+
✅ ドロップイン✓ 在庫あり
$6.18 / 個
データシートを見る →MAX14852GWE+
✅ ドロップイン✓ 在庫あり
$7.25 / 個
データシートを見る →MAX14850ASE+
✅ ドロップイン✓ 在庫あり
$2.41 / 個
データシートを見る →MAX14821ETG+
✅ ドロップイン✓ 在庫あり
$4.65 / 個
データシートを見る →MAX14819AATM+T
✅ ドロップイン✓ 在庫あり
$5.85 / 個
データシートを見る →MAX14882AWE+T 仕様
| 機能 | Isolated high-speed CAN transceiver |
| データレート | 1 Mbps |
| Isolation Voltage | 5 kVRMS |
| Controller-side Supply (VDDA) | 3.0 V to 5.5 V |
| Bus-side Supply (VDDB) | 4.5 V to 5.5 V |
| Receiver Input Common-Mode Range | -25 V to +25 V |
| Bus Fault Tolerance (CANH/CANL) | +/-54 V |
| ESD Protection (Bus-side, HBM) | +/-15 kV |
| Integrated LDO Output Current | 300 mA (max), 130 mA to internal load |
| Number of Drivers/Receivers | 1/1 (Half-Duplex CAN) |
| 動作温度範囲 | -40 C to +125 C |
| パッケージ | 16-pin Wide-body SOIC (W SOIC) |
| Creepage and Clearance | 8 mm |
| 実装タイプ | Surface Mount |
| Standard | ISO 11898-2 compliant CAN |
| RoHS ステータス | Compliant |
MAX14882AWE+T ピン構成
| ピン 1 | GNDA — Controller-side ground (logic domain ground) |
| ピン 2 | VDDA — Controller-side supply, 3.0V to 5.5V |
| ピン 3 | TXD — CAN transmit data input from controller |
| ピン 4 | RXD — CAN receive data output to controller |
| ピン 5 | POL — Polarity swap (swaps CANH/CANL roles for cross-wired cables) |
| ピン 6 | SHDN — Active-low shutdown input |
| ピン 7 | NC — Not connected (per datasheet) |
| ピン 8 | VDDB — Bus-side isolated supply, 4.5V to 5.5V |
| ピン 9 | TXP — Transformer driver positive output (to external transformer primary) |
| ピン 10 | TXN — Transformer driver negative output |
| ピン 11 | GNDB — Bus-side isolated ground |
| ピン 12 | NC — Not connected (per datasheet) |
| ピン 13 | CANL — CAN bus low-side line |
| ピン 14 | CANH — CAN bus high-side line |
| ピン 15 | GNDB — Bus-side ground (secondary pin) |
| ピン 16 | RSVD — Reserved pin (per datasheet, tie to GNDB) |
主な用途
MAX14882AWE+T の用途: 6 件s: Industrial CANopen Automation Networks, Solar Inverter Inter-Module Communication, Building Automation HVAC Controllers, Electric Vehicle Battery Management Systems (BMS), Medical Equipment Isolated CAN Interfaces, Programmable Logic Controller (PLC) Backplane CAN.
Industrial CANopen Automation Networks
The MAX14882AWE+T's 5kVRMS galvanic isolation and -25V to +25V common-mode range make it ideal for industrial CANopen networks connecting PLCs, motor drives, and remote I/O across factory floors. The integrated transformer driver eliminates the discrete isolated DC/DC supply, so each node drops roughly 50% in PCB footprint versus a discrete isolator + SN65HVD251 + isolated power design. Engineers typically place a 100nF plus 10uF ceramic on both VDDA and VDDB within 5mm of the IC, and route CANH/CANL as a 120-ohm twisted pair matched at the bus ends.
おすすめ
Solar Inverter Inter-Module Communication
String inverters and module-level power electronics (MLPE) require robust CAN isolation between high-voltage DC stages and low-voltage monitoring MCUs. The MAX14882AWE+T delivers the 15kV HBM ESD and +/-54V fault tolerance needed when long module-to-module cables pick up lightning-induced transients. Its 1 Mbps data rate exceeds the 500 kbps typically used for CANopen solar profiles. The 8mm creepage of the W SOIC package clears IEC 62109 reinforced-insulation requirements for solar PV equipment up to 1000V DC systems.
おすすめ
Building Automation HVAC Controllers
BACnet over CAN and proprietary HVAC control buses demand isolation between the 24V AC-powered controller board and the field bus. The MAX14882AWE+T's 5kVRMS isolation barrier protects resident microcontrollers from 24VAC common-mode transients, and the wide -25V to +25V receiver range tolerates ground-potential differences across long building wire runs. The integrated LDO can power a small auxiliary sensor (such as a temperature/humidity ASIC) directly, saving a separate regulator in the BOM.
おすすめ
Electric Vehicle Battery Management Systems (BMS)
Battery management CAN buses between high-voltage packs and the vehicle MCU demand both isolation and very high fault tolerance. The MAX14882AWE+T isolates the CAN bus by 5kVRMS, satisfying ISO 6469-3 electric vehicle functional-safety ground separation. The +/-54V CANH/CANL fault tolerance handles load-dump transients on the 12V/24V vehicle bus, and 15kV HBM ESD prevents field failures from assembly and handling. Designers derate the integrated LDO for the BMS slave MCU supply and often add a ferrite bead on the bus-side supply for EMI suppression.
おすすめ
Medical Equipment Isolated CAN Interfaces
Medical devices such as patient monitors, infusion pumps, and imaging systems use isolated CAN to communicate between the patient-contact side and the operator console. The MAX14882AWE+T's 5kVRMS isolation meets IEC 60601-1 means-of-patient-protection (MOPP) requirements when paired with appropriate PCB creepage design. The 1 Mbps data rate supports real-time waveform data, and the -40 to +125 C operating range covers medical-environment thermal stress. The integrated transformer driver simplifies the design to a single isolation barrier, reducing PCB leakage paths.
おすすめ
Programmable Logic Controller (PLC) Backplane CAN
Modular PLC backplanes use CAN to interconnect I/O modules, often across multiple racks with ground-potential differences. The MAX14882AWE+T solves this by isolating each CAN segment at 5kVRMS, breaking ground loops that would otherwise couple 50/60 Hz hum into analog I/O measurements. The 1 Mbps rate is overkill for slow I/O polling but supports high-speed motion-control feedback from servo drives. The integrated transformer driver needs only an off-the-shelf 1:1.3 turns ratio transformer, simplifying multi-rack layouts.
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: MAX14882AWE+T — 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 | MAX14882AWE+ | MAX14852GWE+ | MAX14850ASE+ | MAX14821ETG+ | MAX14819AATM+T |
|---|---|---|---|---|---|---|
| Package | 16-pin W SOIC | 16-pin W SOIC - same | 16-pin W SOIC - same | 16-pin W SOIC - same | 16-pin W SOIC - same | 16-pin W SOIC - same |
| Brand | Analog Devices (formerly Maxim Integrated) | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same |
| Function | Isolated CAN transceiver | Isolated CAN transceiver - same | Isolated RS-485 transceiver | 3-channel digital isolator | Isolated RS-232 transceiver | Isolated CAN transceiver + MCU |
| Isolation Voltage | 5 kVRMS | 5 kVRMS | 5 kVRMS | 5 kVRMS | 5 kVRMS | 2.5 kVRMS |
| Data Rate | 1 Mbps (CAN) | 1 Mbps | 25 Mbps (RS-485) | 25 Mbps (digital) | 1 Mbps (RS-232) | 1 Mbps (CAN) |
| Bus Fault Tolerance | +/-54 V | +/-54 V | +/-54 V | N/A (digital isolator) | +/-25 V | +/-40 V |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C |
主な差別化要因
- Only 16-pin W SOIC isolated CAN transceiver with integrated transformer driver （vs MAX14852GWE+)
- Wider bus fault tolerance than other isolated transceivers （vs MAX14821ETG+)
- POL pin enables software correction of cross-wired cables （vs MAX14819AATM+T)
設計ノート
The MAX14882AWE+T integrates a transformer driver and LDO that produce the bus-side VDDB from the controller-side VDDA plus an external 1:1.3 turns ratio transformer. Place a 100nF X7R ceramic plus a 10uF electrolytic within 5mm of both the VDDA and VDDB pins to suppress switching noise from the internal push-pull transformer driver. The integrated LDO can source up to 300mA (130mA reserved for internal MAX14882 load); derate at high ambient, since the W SOIC package has approximately 80 C/W theta-JA on a 4-layer JEDEC board.
Route the CANH and CANL traces as a differential pair with 100-ohm differential impedance, matching the 120-ohm termination at the bus ends (split termination with two 60-ohm resistors and a 4.7nF cap to GND for better EMI). Maintain 8mm of creepage on the W SOIC package per IEC 60664-1 by removing all copper under the IC body and placing no copper within 4mm of the package edges on the bus side. The transformer primary traces (TXP, TXN) should be short, symmetric, and guarded by a ground pour.
Do not tie the bus-side ground (GNDB) to the controller-side ground (GNDA) anywhere on the PCB - this defeats the 5kVRMS isolation barrier. Do not omit the POL pin connection; leaving it floating can cause unreliable CANH/CANL polarity. The SHDN pin must be tied high (logic 1) for normal operation; pulling it low disables both the transformer driver and the bus-side LDO. For CAN-FD applications above 1 Mbps, consider the MAX33012E instead.
Place the external transformer immediately adjacent to the TXP/TXN pins (within 3mm trace length) to minimize radiated EMI from the high-frequency push-pull driver. Use a 1:1.3 turns ratio transformer with at least 1kV isolation rating (e.g., Würth Elektronik 750311504 or Coilcraft DA2033-AL). Shield the transformer with a grounded copper pour on all four sides, leaving the 8mm creepage window around the package.
コンプライアンス情報
RoHS and REACH compliant per Analog Devices product page. Not AEC-Q100 qualified; for AEC-Q100 isolation choose MAX14882 automotive variant (MAX14882AWE/V+). Halogen-free status not explicitly stated in the verified web data - listed as unknown.
