ADM2486BRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices
N.º da peça: ADM2486BRWZ-RL7 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.85 | $4,85 |
| 10 | $4.35 | $43,50 |
| 100 | $3.9 | $390,00 |
| 500 | $3.2 | $1.600,00 |
| 1.000 | $2.5 | $2.500,00 |
ADM2486BRWZ-RL7 Visão geral
A digital isolator combined with an RS-485 transceiver is an integrated interface component that provides galvanic isolation between a logic-side controller and a high-voltage bus side. In a system hierarchy, the ADM2486 sits in the physical-layer interface between a UART, MCU, DSP, or PROFIBUS ASIC and the differential RS-485 bus. Its isolation barrier prevents ground loops, common-mode voltages, and transient noise from corrupting the logic-side supply and data lines, which is essential in industrial networking, factory automation, and building control.
Key features include Analog Devices iCoupler® magnetic isolation technology, PROFIBUS compliance, ANSI EIA/TIA 485-A and ISO 8482:1987 (E) compliance, 20 Mbps data rate, 3 V operation on VDD1, and 25 kV/µs CMTI. The transceiver integrates a three-channel isolator, a three-state differential line driver, and a differential input receiver in one 16-SOICW package. The RL7 tape-and-reel packaging supports automated pick-and-place assembly, while the 16-pin SOIC wide-body footprint is a common industry-standard form factor.
Technical depth is provided by the iCoupler architecture, which uses chip-scale transformers instead of optocouplers, offering better timing accuracy, longer life, and stable CMTI over temperature. The 25 kV/µs CMTI ensures that fast-rising common-mode transients generated by motor drives, inverters, and contactors do not produce bit errors on the bus. This makes the device well suited to electrically noisy industrial environments where isolation integrity is critical.
Typical applications include PROFIBUS DP fieldbus networks, PLC remote I/O, motor-drive communication, building automation, smart-grid metering, and SCADA remote terminal units. With its 20 Mbps data rate, the ADM2486 supports both high-speed fieldbus traffic and slower legacy RS-485 systems, providing design flexibility across multiple product lines.
When designing with this device, place the isolated bus-side components close to the field connector and maintain a clean isolation barrier on the PCB. Add 120 Ω termination resistors at both ends of the RS-485 bus and bias resistors if the receiver does not have integrated fail-safe biasing. The RL7 suffix denotes a 7-inch tape-and-reel package variant, so confirm reel quantity with the distributor for production planning.
Alternativas drop-in para ADM2486BRWZ-RL7 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ADM2486BRWZ-RL7 (mesmo formato e footprint) — diferindo em Data Rate, Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ADM2483BRWZ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$3.8182 / unidade
Ver ficha técnica →ISO1176DWR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ISO3082DWR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
IL3685
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ADM2486BRWZ-RL7 Especificações
| Technology | iCoupler® digital isolation |
| Type | RS-422/RS-485 transceiver, half-duplex |
| Isolation Channels | 3 |
| Isolation Voltage | 2500 Vrms |
| Taxa de dados | 20 Mbps |
| CMTI | 25 kV/µs |
| Duplex Mode | Half-duplex |
| VDD1 Supply | 3 V operation (VDD1) |
| Dual Supply Voltage (Typ) | 5 V / 3.3 V |
| Maximum Dual Supply Voltage | 5.5 V / 5.25 V |
| Protocol Compliance | PROFIBUS, ANSI EIA/TIA 485-A, ISO 8482:1987(E) |
| Package Type | 16-SOIC (0.295", 7.50mm Width) |
| Contagem de pinos | 16 |
| Tipo de montagem | Surface Mount |
| Package Length | 10.5 mm (Max) |
| Package Width | 7.6 mm (Max) |
| Package Height | 2.35 mm (Max) |
| Temperature Grade | Industrial |
| Lead Shape | Gull-wing |
| Lead-Free / RoHS Status | Z suffix indicates Pb-free finishing (not independently verified) |
Guia de Configuração de Pinos do ADM2486BRWZ-RL7 2.35 mm (max)
Configuração de pinos para ADM2486BRWZ-RL7 (pacote 2.35 mm (max)). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para ADM2486BRWZ-RL7.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ADM2486BRWZ-RL7 é adequado para 6 aplicaçãos: PROFIBUS DP Fieldbus Networks, Industrial Automation and PLC I/O, Motor Drive and Inverter Communication, Building Automation and HVAC, Smart Grid and Energy Metering, SCADA and Remote Terminal Units.
PROFIBUS DP Fieldbus Networks
The ADM2486BRWZ-RL7 is well suited to PROFIBUS DP networks because it is explicitly PROFIBUS-compliant and operates at 20 Mbps, the maximum data rate used by PROFIBUS DP. Its 2500 Vrms galvanic isolation removes ground loops between fieldbus nodes and the controller, and 25 kV/µs CMTI preserves data integrity during transients. In a typical node, the transceiver connects the UART/PROFIBUS ASIC to the 485 bus; A and B outputs are terminated with 120 Ω at each cable end. The 3 V VDD1 logic supply allows direct interface to 3.3 V controllers without level shifting.
Recomendado
Industrial Automation and PLC I/O
The ADM2486's 20 Mbps data rate and 2500 Vrms isolation make it an excellent physical-layer device for PLC backplanes, remote I/O, and fieldbus couplers. It supports half-duplex multipoint bus transmission lines, matching common RS-485 industrial topologies. In a PLC digital I/O module, the RL7 tape-and-reel package supports high-volume assembly, and 25 kV/µs CMTI rejects noise from adjacent contactors and motor starters. Designers should place the isolated side near the field connector and keep the isolation barrier free of copper to maintain rated creepage.
Recomendado
Motor Drive and Inverter Communication
Variable-frequency drives using RS-485/PROFIBUS links benefit from ADM2486's low propagation and high CMTI, which prevents false bit errors caused by fast-rising common-mode voltages from the inverter switching. The 16-SOICW package is small enough for drive control boards, and 20 Mbps throughput supports fast parameter upload/download and cyclic PROFIdrive traffic. With VDD1 at 3 V, the device can connect directly to 3.3 V DSP/MCU UARTs, simplifying the BOM. For EMC-critical designs, the 2500 Vrms isolation rating provides a defined withstand voltage between the logic and bus side.
Recomendado
Building Automation and HVAC
Building automation BACnet MS/TP and Modbus RTU segments typically run below 500 kbps, but deploy the ADM2486 when the bus also carries faster proprietary telegrams or when one part number is preferred across multiple product lines. The 3 V VDD1 supply and 16-SOICW footprint simplify controller board layout, while 2500 Vrms isolation prevents ground potential differences between HVAC controllers in different equipment rooms. CMTI of 25 kV/µs keeps communication stable in buildings with large inductive loads. For lower-cost, lower-speed segments, the ADM2483BRWZ is the recommended alternative.
Recomendado
Smart Grid and Energy Metering
Electricity meters and concentrators use isolated RS-485 to communicate over long, noise-prone runs between meter and data collector. ADM2486's 20 Mbps data rate is higher than needed for meter reading, but it provides headroom for firmware upgrades over the bus; its 2500 Vrms isolation guards metering electronics from surges coupled into outdoor cabling. The 25 kV/µs CMTI limits bit errors when lightning-induced transients couple into the twisted pair. The RL7 tape-and-reel variant is suited to high-volume meter production. Pair with TVS protection on the bus lines for full transient hardening.
Recomendado
SCADA and Remote Terminal Units
SCADA RTUs and substation controllers require reliable isolated RS-485 links to sensors and reclosers. ADM2486's 20 Mbps throughput allows collection of high-resolution waveforms, while 2500 Vrms isolation and 25 kV/µs CMTI reject ground shift and switching transients in utility environments. The half-duplex 2-wire bus topology minimizes cabling, and PROFIBUS compliance makes the part drop-in ready for industrial RTU protocols. In substation applications, designers should add 120 Ω termination and bias resistors according to bus length. The 16-SOICW package allows dense I/O cards; the RL7 tape-and-reel option streamlines assembly.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADM2486BRWZ-RL7 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ADM2483BRWZ | ISO1176DWR | ISO3082DWR | IL3685 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | NVE Corporation |
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) |
| Data Rate | 20 Mbps | 500 kbps | 40 Mbps | 20 Mbps | 20 Mbps |
| Duplex Mode | Half-duplex | Half-duplex | Half-duplex | Half-duplex | Half-duplex |
| Protocol Compliance | PROFIBUS, ANSI EIA/TIA 485-A, ISO 8482:1987(E) | ANSI EIA/TIA 485-A, ISO 8482 | ANSI EIA/TIA 485-A | ANSI EIA/TIA 485-A | ANSI EIA/TIA 485-A |
Principais diferenciais
- 20 Mbps data rate and PROFIBUS compliance (vs ADM2483BRWZ)
- 3 V VDD1 logic supply (vs ISO1176DWR)
- 25 kV/µs CMTI in a 16-SOICW package (vs IL3685)
Notas de projeto
Always terminate the RS-485 bus with 120 Ω resistors at both ends of the cable to prevent reflections at 20 Mbps. The ADM2486 does not integrate fail-safe biasing, so add pull-up and pull-down bias resistors on the A and B lines if the bus can float when all drivers are disabled. Without termination and biasing, high-speed PROFIBUS segments can experience bit errors and missed telegrams.
Maintain a clean isolation barrier under the iCoupler package by removing copper on all layers beneath the isolation gap. Place 100 nF ceramic decoupling capacitors on VDD1 and VDD2 as close to the IC pins as possible, and use a solid ground pour on each side of the barrier. This reduces common-mode coupling and preserves the 2500 Vrms isolation rating.
VDD1 is specified for 3 V operation, so confirm the logic-side supply is within the datasheet range before interfacing to a 3.3 V MCU or DSP. The bus-side VDD2 supply must also be decoupled with a 10 µF plus 100 nF capacitor combination if the cable is long. For systems that need isolated power, use a companion isolated DC-DC transceiver such as ADM2587EBRWZ-REEL7 instead of adding a separate isolated supply.
Informações de conformidade
Distributor MPN includes Z suffix, commonly used by ADI for Pb-free/RoHS compliant parts; not explicitly confirmed in fetched data. Industrial temperature grade only, not AEC-Q100 qualified.