ADM2561EBRNZ-RL7 - 3kV Isolated RS-485/RS-422 Transceiver | ADI
Teilenummer: ADM2561EBRNZ-RL7 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $14.2 | $14,20 |
| 10 | $12.78 | $127,80 |
| 100 | $11.36 | $1.136,00 |
| 500 | $10.21 | $5.105,00 |
| 1.000 | $9.07 | $9.070,00 |
ADM2561EBRNZ-RL7 Übersicht
An isolated RS-485 transceiver is a physical-layer interface IC that combines galvanic isolation with a differential line driver/receiver. Isolation breaks ground loops between the local controller (MCU, FPGA, processor) and the remote bus nodes, allowing long cables, large common-mode voltages, and improved noise immunity in industrial systems. The ADM2561E family complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E), placing it within the RS-485 transceiver product hierarchy: RS-485 transceiver -> line transceiver -> interface IC -> integrated circuit.
Key features include 3 kV RMS isolation per UL 1577, integrated isolated DC-DC converter (no external transformer required), up to 25 Mbps data rate, and a 1-channel full-/half-duplex topology. The transceiver operates from a single 3 V or 5 V supply on the logic side, with the bus side powered through the integrated isoPower converter. Receiver failsafe features guarantee a known output state on idle or shorted bus, and the device supports up to 256 nodes on a single bus. Wide-body SOIC-W-FP provides 8 mm of creepage/clearance for reinforced isolation.
The architecture uses ADI's iCoupler technology: chip-scale transformers for both signal isolation (coreless digital isolation) and power isolation (isoPower integrated DC-DC). This eliminates the need for a discrete isolation barrier plus separate isolated supply, saving ~50% PCB area versus discrete solutions. Latency is typically <100 ns per channel, making the device adequate for high-speed industrial protocols such as Profibus, Modbus RTU, and high-speed motion-control networks.
Typical applications include industrial fieldbus nodes (Modbus, Profibus, BACnet), solar inverter string monitoring, building automation gateways, motor-control encoder links, and any long-cable RS-485 link where ground potential differences exceed ±10 V. The integrated isoPower allows single-supply designs, simplifying bill-of-materials for isolated nodes.
Designers should budget for the SOIC-W-FP land pattern and observe creepage/clearance constraints for reinforced isolation. The exposed pad must be soldered to a sufficiently large copper island connected only to the logic-side ground or left floating per safety certification.
This page synthesizes distributor pricing, drop-in alternatives, and engineering guidance not found in the standalone datasheet, helping procurement and design engineers evaluate the ADM2561EBRNZ-RL7 faster.
Drop-in-Alternativen für ADM2561EBRNZ-RL7 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ADM2561EBRNZ-RL7 (gleiche Bauform und Footprint) – abweichend in Package, Protocol, Function, Compliance, Data Rate.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ADM2561EBRNZ
✓ Auf Lager
$6.78 / Stück
Datenblatt ansehen →ADM2565EBRNZ-RL7
✓ Auf Lager
$8.74 / Stück
Datenblatt ansehen →ADM2861EBRNZ-RL7
📋 Referenzalternative (nicht im Katalog)
ADM2563EBRNZ-RL7
📋 Referenzalternative (nicht im Katalog)
ADM2567EBRNZ-RL7
📋 Referenzalternative (nicht im Katalog)
ADM2561EBRNZ-RL7 Technische Daten
| Funktion | Isolated RS-485/RS-422 transceiver (signal + power isolation) |
| Protocol | RS-422, RS-485 |
| Number of Drivers/Receivers | 1/1 (2/2 transceiver) |
| Duplex | Full / Half |
| Data Rate (max) | 25 Mbps |
| Isolation Voltage (RMS) | 3 kV RMS |
| ESD Protection (bus pins) | ±15 kV IEC 61000-4-2 |
| Supply Voltage - Logic Side | 3 V to 5.5 V |
| Integrated Isolated DC-DC | Yes (isoPower) |
| Number of Nodes (bus) | 256 |
| Betriebstemperatur | -40C to +85C |
| Gehäuse | 28-SOIC-W-FP (wide-body SOIC with exposed pad) |
| Montageart | Surface Mount |
| Creepage / Clearance | 8 mm |
| Compliance | ANSI/TIA/EIA-485-A-98; ISO 8482:1987(E); UL 1577 |
ADM2561EBRNZ-RL7 Pin-Konfiguration
| Pin 1 | VDD1 — Logic-side supply voltage (3V to 5.5V) |
| Pin 2 | GND1 — Logic-side ground |
| Pin 3 | RXD — Receiver output (logic-side) |
| Pin 4 | TXD — Driver input (logic-side) |
| Pin 5 | RE — Receiver enable (active low, logic-side) |
| Pin 6 | DE — Driver enable (logic-side) |
| Pin 7 | NC — Not connected |
| Pin 8 | NC — Not connected |
| Pin 9 | NC — Not connected |
| Pin 10 | NC — Not connected |
| Pin 11 | NC — Not connected |
| Pin 12 | NC — Not connected |
| Pin 13 | NC — Not connected |
| Pin 14 | NC — Not connected |
| Pin 15 | GND2 — Bus-side ground (isolated) |
| Pin 16 | A — Non-inverting driver output / receiver input |
| Pin 17 | B — Inverting driver output / receiver input |
| Pin 18 | NC — Not connected |
| Pin 19 | NC — Not connected |
| Pin 20 | NC — Not connected |
| Pin 21 | NC — Not connected |
| Pin 22 | NC — Not connected |
| Pin 23 | NC — Not connected |
| Pin 24 | NC — Not connected |
| Pin 25 | VDD2 — Bus-side isolated supply |
| Pin 26 | NC — Not connected |
| Pin 27 | NC — Not connected |
| Pin 28 | EP — Exposed pad (logic-side ground or floating) |
Typische Anwendungen
ADM2561EBRNZ-RL7 ist geeignet für 6 Anwendungs: Industrial Fieldbus Nodes (Modbus / Profibus), Solar Inverter String Monitoring, Building Automation Gateways (BACnet / KNX), Motor Control Encoder Links, Remote Sensor / Data Logger Networks, Smart Grid Substation Communication.
Industrial Fieldbus Nodes (Modbus / Profibus)
The ADM2561EBRNZ-RL7 is a strong fit for isolated industrial fieldbus nodes because its 3 kV RMS isolation breaks ground loops between PLCs and remote RTUs, while the integrated isoPower DC-DC removes the need for a discrete isolated supply. The 1/1 driver/receiver supports full- or half-duplex Modbus RTU and Profibus DP links at up to 25 Mbps, and the ±15 kV IEC ESD on the bus side handles cable transients typical of industrial plants. Placed at the field end of the bus, the ADM2561EBRNZ-RL7 reduces BOM and PCB area versus a discrete digital isolator plus isolated DC-DC solution, and its 8 mm creepage supports reinforced insulation in 250 V installations.
Empfohlen
Solar Inverter String Monitoring
The ADM2561EBRNZ-RL7 fits solar PV string monitoring because PV panels can float at DC potentials exceeding ±1000 V relative to the inverter ground, and the 3 kV RMS isolation provides the safety barrier required for high-voltage systems. The integrated isoPower converter eliminates a bulky discrete isolated supply, simplifying the small combiner-box form factor. The 25 Mbps data rate aggregates data from many string monitors at high update rates, and ±15 kV ESD protects against the static buildup common on outdoor PV arrays. The SOIC-W-FP footprint allows compact board placement in IP65-rated enclosures, while the -40C to +85C operating range covers rooftop PV thermal conditions.
Empfohlen
Building Automation Gateways (BACnet / KNX)
The ADM2561EBRNZ-RL7 supports building automation gateways running BACnet MS-TP or KNX twisted-pair networks, where controllers and field devices often share long cable runs across floors with significant ground potential differences. The 3 kV RMS isolation prevents ground-loop-induced data errors on these long links, and the 256-node capability covers large commercial buildings with many devices per bus. The 25 Mbps rate handles the BACnet MS-TP baud rates with margin, while the wide-body SOIC-W-FP 8 mm creepage meets the 250 V reinforced insulation commonly required in commercial wiring. Integrated isoPower saves substantial board space compared to discrete alternatives, fitting inside the slim gateway enclosures used in building automation.
Empfohlen
Motor Control Encoder Links
Servo drives and motor controllers use isolated RS-485 links to communicate with absolute encoders mounted on the motor shaft, and the ADM2561EBRNZ-RL7 provides the 3 kV barrier needed between high-voltage drive stages and low-voltage encoder electronics. The integrated isolated DC-DC simplifies the encoder interface PCB by removing the need for an external transformer, and the 25 Mbps data rate handles high-speed BiSS-C or SSI encoder protocols with latency under 100 ns. The ±15 kV ESD rating protects encoder cable interfaces, while the 256-node capability supports multi-axis machines with multiple encoders per bus. The wide-body package provides the creepage required for reinforced isolation at industrial motor voltages.
Empfohlen
Remote Sensor / Data Logger Networks
Remote data loggers in field-deployed environmental sensors use the ADM2561EBRNZ-RL7 to communicate over long RS-485 links back to a central gateway, where ground potential differences often exceed ±10 V and CN2 ground-loop noise corrupts data. The 3 kV RMS isolation eliminates these ground-loop issues, and the integrated isoPower DC-DC simplifies battery-powered logger designs by removing a discrete isolated supply. The 25 Mbps data rate aggregates data from many sensor clusters, and the ±15 kV ESD protects cable interfaces in outdoor environments. The 28-SOIC-W-FP package fits inside small IP-rated enclosures, while the -40C to +85C range covers outdoor temperature swings common in remote monitoring.
Empfohlen
Smart Grid Substation Communication
Utility substations require communication between intelligent electronic devices (IEDs) over RS-485 links subject to very high common-mode voltages from switching transients. The ADM2561EBRNZ-RL7 fits substation IED communication because its 3 kV RMS isolation handles the 250 V reinforced insulation typical of substation environments, while ±15 kV IEC ESD protects against transient events from disconnector operation. The 25 Mbps rate aggregates status data from many protection relays, and the integrated isoPower converter simplifies the small IED form factor. The 28-SOIC-W-FP wide-body package provides the 8 mm creepage required by IEC 61850-3 substation standards, making the part a practical isolation solution for utility-grade equipment.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ADM2561EBRNZ-RL7 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ADM2561EBRNZ | ADM2861EBRNZ-RL7 | ADM2563EBRNZ-RL7 | ADM2565EBRNZ-RL7 | ADM2567EBRNZ-RL7 |
|---|---|---|---|---|---|---|
| Package | 28-SOIC-W-FP | 28-SOIC-W-FP - same | 28-SOIC-W-FP - same | 28-SOIC-W-FP - same | 28-SOIC-W-FP - same | 28-SOIC-W-FP - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage (RMS) | 3 kV | 3 kV | 5.7 kV | 3 kV | 3 kV | 3 kV |
| Data Rate | 25 Mbps | 25 Mbps | 25 Mbps | 500 kbps | 20 Mbps | 25 Mbps |
| Integrated Isolated DC-DC | Yes (isoPower) | Yes | Yes | Yes | Yes | Yes |
| Duplex | Full / Half | Full / Half | Full / Half | Full / Half | Full / Half | Half only |
| ESD Protection (bus) | ±15 kV IEC | ±15 kV IEC | ±15 kV IEC | ±15 kV IEC | ±15 kV IEC | ±15 kV IEC |
| Number of Bus Nodes | 256 | 256 | 256 | 256 | 256 | 256 |
| Packaging Format | Tape & Reel (-RL7) | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Wichtigste Unterscheidungsmerkmale
- Higher isolation voltage (5.7 kV) available in pin-compatible family (vs. ADM2861EBRNZ-RL7)
- 25 Mbps highest data rate in isolated family (vs. ADM2563EBRNZ-RL7)
- Full and half duplex support (vs. ADM2567EBRNZ-RL7)
Designhinweise
The 28-SOIC-W-FP package requires a wide-body land pattern with at least 8 mm of creepage/clearance between logic-side and bus-side pins for reinforced isolation at 250 V working voltage per IEC 60747-17. The exposed pad (pin 28) must be soldered to a sufficiently large copper island connected to logic-side ground or left floating, per safety certification rules. Decoupling capacitors (typically 0.1 uF plus 10 uF ceramic) must be placed as close as possible to VDD1 and VDD2. Avoid routing logic-side and bus-side traces underneath the package body to maintain creepage.
Do not bypass the isoPower decoupling network: place 0.1 uF and 10 uF ceramic capacitors on both VDD1 (logic side) and VDD2 (bus side, generated) within physically installed envelopes to satisfy EMI and EMC standards. The receiver failsafe output guarantees a known state on idle or shorted bus, but in the rare case of a mid-voltage differential bus, designers should add external fail-safe biasing resistors (typically 560 ohm pull-up on A and 560 ohm pull-down on B) for ultra-reliable designs. Never route bus signals near the logic-side clock or switcher traces.
Maintain 8 mm minimum creepage between VDD1/GND1 (logic side) and VDD2/GND2/A/B (bus side). Use a slotted PCB cut-out or keep-out zone under the IC body if the layout requires it for higher working voltage. Place a TVS diode array (such as PESD1CAN or similar) on the bus side for additional surge protection in outdoor installations, even though the ADM2561EBRNZ-RL7 already has ±15 kV IEC ESD. Use twisted-pair cable with 120 ohm characteristic impedance, terminated at both ends with 120 ohm resistors, to minimize reflections on long RS-485 links.
Compliance-Informationen
RoHS and REACH compliant per Analog Devices product page. UL 1577 recognized for 3 kV RMS isolation. ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) compliant. Not AEC-Q100 qualified - this is an industrial-grade transceiver, not automotive-grade.
