ADM2484EBRWZ - Isolated RS-485 Transceiver | Analog Devices
MPN: ADM2484EBRWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
ADM2484EBRWZ Overview
An isolated RS-485 transceiver is a device that combines a differential line driver and receiver with galvanic isolation between the bus side and the logic side. This isolation protects the microcontroller and other low-voltage circuitry from ground potential differences, electrical noise, and transient surges that can occur on long communication lines. The ADM2484E integrates the isolation barrier using Analog Devices' iCoupler technology, which uses chip-scale transformers to transmit data across the isolation boundary, eliminating the need for external optocouplers and providing more reliable and higher-speed isolation compared to traditional optocoupler-based solutions.
Key features of the ADM2484EBRWZ include a 3.3 V or 5 V logic supply, a 5 V bus supply, and a wide common-mode input range. The transceiver supports both half-duplex and full-duplex operation, with the transmitter outputs and receiver inputs sharing the same transmission line in half-duplex mode. The device also features thermal shutdown protection and a low quiescent current, making it suitable for power-sensitive applications. The ±15 kV ESD protection on the bus pins ensures robustness in harsh industrial environments.
The ADM2484E uses a differential signaling scheme that provides excellent noise immunity and allows data transmission over distances up to 1200 meters. The integrated isolation barrier provides 5000 Vrms isolation, which is essential for applications where ground potential differences exist between nodes. The device's 25 kV/µs CMTI ensures that fast transients on the bus do not corrupt the data, making it ideal for motor drives, inverters, and other high-noise environments.
Typical applications include industrial fieldbus networks, building automation, HVAC systems, and process control. The ADM2484EBRWZ is also suitable for isolated RS-485 interfaces in solar inverters, battery management systems, and other power electronics. Its robust ESD protection and high isolation voltage make it a reliable choice for long-distance communication in harsh environments.
When designing with the ADM2484EBRWZ, it is important to provide proper decoupling on both the logic and bus supply pins, and to ensure that the bus termination resistors are correctly placed to match the characteristic impedance of the transmission line. The device's thermal shutdown feature protects it from over-temperature conditions, but adequate PCB layout with proper grounding is essential for optimal performance.
Drop-in alternatives for ADM2484EBRWZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADM2484EBRWZ (same form factor and footprint) — differing in Package, Duplex, Isolation Voltage, Number of Channels, Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADM2484EBRWZ-REEL7
📋 Reference alternative (not in catalog)
ADM2483EBRWZ
📋 Reference alternative (not in catalog)
ADM2484EBRWZ-REEL
📋 Reference alternative (not in catalog)
ISO3082DW
📋 Reference alternative (not in catalog)
ISL32704EIBZ
📋 Reference alternative (not in catalog)
ADM2484EBRWZ Specifications
| Type | Isolated RS-485/RS-422 Transceiver |
| Number of Channels | 3 |
| Isolation Voltage | 5000 Vrms |
| Data Rate | 500 kbps |
| CMTI | 25 kV/µs |
| ESD Protection | ±15 kV |
| Supply Voltage (Logic) | 3.3 V or 5 V |
| Supply Voltage (Bus) | 5 V |
| Duplex | Half/Full |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Operating Temperature | -40°C to +85°C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Number of Drivers/Receivers | 1/1 |
ADM2484EBRWZ Pin Configuration
| Pin 1 | VDD1 — Logic supply voltage (3.3 V or 5 V) |
| Pin 2 | GND1 — Logic ground |
| Pin 3 | RO — Receiver output |
| Pin 4 | RE — Receiver enable (active low) |
| Pin 5 | DE — Driver enable (active high) |
| Pin 6 | DI — Driver input |
| Pin 7 | GND1 — Logic ground |
| Pin 8 | NC — No connect |
| Pin 9 | VDD2 — Bus supply voltage (5 V) |
| Pin 10 | GND2 — Bus ground |
| Pin 11 | A — Receiver input non-inverting |
| Pin 12 | B — Receiver input inverting |
| Pin 13 | Z — Driver output inverting |
| Pin 14 | Y — Driver output non-inverting |
| Pin 15 | GND2 — Bus ground |
| Pin 16 | VDD2 — Bus supply voltage (5 V) |
Typical Applications
ADM2484EBRWZ is suitable for 6 applications: Industrial Fieldbus Networks, Building Automation, Solar Inverters, Motor Drives, Process Control, Battery Management Systems.
Industrial Fieldbus Networks
The ADM2484EBRWZ is ideal for industrial fieldbus networks such as Modbus and Profibus, where robust isolation and high noise immunity are required. Its 5000 Vrms isolation protects logic-side circuitry from ground potential differences and transients on the bus. The 500 kbps data rate supports standard baud rates used in these networks, and the 25 kV/µs CMTI ensures reliable communication in the presence of motor drives and other EMI sources. The ±15 kV ESD protection on the bus pins adds robustness in harsh industrial environments.
Recommended
Building Automation
In building automation systems, the ADM2484EBRWZ provides isolated RS-485 communication for HVAC controllers, lighting systems, and access control panels. Its 5000 Vrms isolation ensures safety and reliability when connecting devices across different floors or buildings with potential ground potential differences. The half-duplex capability allows two-wire bus topologies, reducing cabling cost. The wide operating temperature range and robust ESD protection make it suitable for long-term deployment in building environments.
Recommended
Solar Inverters
The ADM2484EBRWZ is well-suited for solar inverter systems, where isolated communication between the inverter and monitoring equipment is essential. The 5000 Vrms isolation protects the low-voltage control circuitry from high-voltage DC bus transients. The 25 kV/µs CMTI ensures reliable data transmission in the presence of switching noise from the inverter's power stage. The ±15 kV ESD protection on the bus pins provides robustness against electrostatic discharges during installation and maintenance.
Recommended
Motor Drives
In motor drive applications, the ADM2484EBRWZ provides isolated RS-485 communication between the drive controller and the motor or remote sensors. The high CMTI of 25 kV/µs is critical in this environment, as fast voltage transients from the motor's PWM switching can otherwise corrupt data. The 5000 Vrms isolation protects the control electronics from high-voltage spikes. The device's robust ESD protection and wide temperature range ensure reliable operation in industrial motor control cabinets.
Recommended
Process Control
The ADM2484EBRWZ is used in process control systems for isolated communication between field instruments and control room equipment. Its 5000 Vrms isolation ensures safety in hazardous environments where ground potential differences can be significant. The 500 kbps data rate supports fast update rates for real-time control. The device's half-duplex and full-duplex modes provide flexibility in network topology. The ±15 kV ESD protection enhances reliability in industrial settings.
Recommended
Battery Management Systems
In battery management systems (BMS) for electric vehicles and energy storage, the ADM2484EBRWZ provides isolated communication between battery modules and the central controller. The 5000 Vrms isolation is essential to prevent ground loops and protect low-voltage electronics from high-voltage battery stacks. The 25 kV/µs CMTI ensures reliable data transmission in the presence of switching noise from power converters. The device's wide temperature range and robust ESD protection make it suitable for automotive and industrial BMS applications.
Recommended
Recommended Products Summary
Engineering reference data for ADM2484EBRWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADM2484EBRWZ-REEL7 | ADM2483EBRWZ | ISO3082DW |
|---|---|---|---|---|
| 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 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Data Rate | 500 kbps | 500 kbps | 250 kbps | 200 kbps |
| CMTI | 25 kV/µs | 25 kV/µs | 20 kV/µs | 25 kV/µs |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±16 kV |
| Supply Voltage (Logic) | 3.3 V or 5 V | 3.3 V or 5 V | 3.3 V or 5 V | 3.3 V or 5 V |
| Duplex | Half/Full | Half/Full | Half/Full | Half/Full |
Key Differentiators
- Higher data rate than ADM2483EBRWZ (vs ADM2483EBRWZ)
- Higher CMTI than ADM2483EBRWZ (vs ADM2483EBRWZ)
- Higher data rate than ISO3082DW (vs ISO3082DW)
Design Notes
Place decoupling capacitors (0.1 µF and 10 µF) close to both VDD1 and VDD2 pins to ensure stable operation. Use a solid ground plane for GND1 and GND2, and keep the isolation barrier clear of copper to maintain isolation integrity. Refer to the ADM2484E datasheet for recommended layout guidelines.
Ensure proper termination resistors (typically 120 Ω) are placed at both ends of the RS-485 bus to match the characteristic impedance and prevent reflections. Incorrect termination can cause data errors at high data rates. Also, avoid exceeding the absolute maximum ratings for supply voltages and bus voltages.
The ADM2484EBRWZ has thermal shutdown protection, but ensure adequate PCB copper area for heat dissipation, especially in high-temperature environments. The device's power dissipation is low, but proper thermal management extends reliability. Refer to the datasheet for thermal resistance values.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
