Overview
The ADM2483BRWZ, produced by Analog Devices Inc., is a half-duplex iCoupler-R isolated RS-485 transceiver. This integrated component is designed for bidirectional data communication on balanced, multipoint bus transmission lines. It utilizes Analog Devices' iCoupler technology to provide galvanic isolation, combining a 3-channel isolator, a three-state differential line driver, and a differential input receiver in a single package. The device is compliant with ANSI EIA/TIA-485-A and ISO 8482: 1987(E) standards.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Impedance | 96 kΩ | |
| Maximum Number of Transceivers on the Bus | 256 | |
| Data Rate | 500 kbps | |
| Logic Side Supply Voltage | 3 V or 5 V | V |
| Bus Side Supply Voltage | 5 V | V |
| Power-Up Threshold (VDD1) | 2.0 V | V |
| Power-Down Threshold (VDD1) | 1.0 V | V |
| Power-Up Threshold (VDD2) | 3.3 V | V |
| Power-Down Threshold (VDD2) | 2.4 V | V |
| Package Type | 16-lead, wide body SOIC | |
| Operating Temperature Range | Industrial temperature range |
Key Features
- Galvanic isolation using iCoupler technology
- Three-state differential line driver and differential input receiver
- Active-high enable feature for the driver and receiver
- True fail-safe receiver inputs ensuring a logic-high output when inputs are open or shorted
- Current limiting and thermal shutdown protection against output short circuits and bus contention
- Slew-limited driver to reduce reflections on improperly terminated transmission lines
- Minimal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V
Applications
- Industrial automation and control systems
- Automotive interfaces (e.g., CAN, Ethernet)
- Industrial I/O and fieldbus communications
- Building automation and control systems
- Any application requiring isolated RS-485 communication
Q & A
- What is the ADM2483BRWZ used for?
The ADM2483BRWZ is used for bidirectional data communication on balanced, multipoint bus transmission lines, particularly in applications requiring galvanic isolation.
- What standards does the ADM2483BRWZ comply with?
The device complies with ANSI EIA/TIA-485-A and ISO 8482: 1987(E) standards.
- What is the maximum data rate of the ADM2483BRWZ?
The maximum data rate is 500 kbps.
- How many transceivers can be connected on the bus?
Up to 256 transceivers can be connected on the bus.
- What are the supply voltage options for the logic side and bus side?
The logic side can be powered with either a 3 V or 5 V supply, while the bus side uses a 5 V supply only.
- What protection features does the ADM2483BRWZ have?
The device includes current limiting, thermal shutdown, and true fail-safe receiver inputs for protection.
- What is the purpose of the slew-limited driver?
The slew-limited driver reduces reflections on improperly terminated transmission lines.
- What happens to the receiver output when the inputs are open or shorted?
The receiver output remains in a logic-high state when the inputs are open or shorted due to the true fail-safe feature.
- What is the operating temperature range of the ADM2483BRWZ?
The device is fully specified over the industrial temperature range.
- What package type is the ADM2483BRWZ available in?
The device is available in a 16-lead, wide body SOIC package.
