Overview
The ADM4850ARZ from Analog Devices Inc. is a half-duplex RS-422/RS-485 transceiver designed for high-speed, multipoint bus transmission lines. This device is suitable for industrial and commercial applications, offering features such as reduced slew rates for low electromagnetic interference (EMI) and true fail-safe receiver inputs. The transceiver allows up to 256 devices on a single bus due to its 1/8-unit load receiver input impedance. It also includes thermal shutdown and short-circuit protection, ensuring reliable operation in various environments.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Protocol | RS422, RS485 |
| Duplex Mode | Half Duplex |
| Number of Drivers/Receivers | 1/1 |
| Supply Voltage | 4.75 V to 5.25 V |
| Data Rate | 115 kbps (typical), up to 250 kbps (maximum) |
| Package Type | 8-lead SOIC (Small Outline IC) |
| Operating Temperature | -40°C to +85°C |
| Receiver Hysteresis | 20 mV |
| Bus Common-Mode Range | -7 V to +12 V |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Compliance | Yes |
Key Features
- Reduced slew rates for low electromagnetic interference (EMI)
- True fail-safe receiver inputs to ensure a logic high output level when inputs are open or shorted
- Thermal shutdown and short-circuit protection for enhanced reliability
- Supply current in shutdown mode is 5 µA maximum
- Pin-compatible with the MAX308x series
- Outputs are high-Z when disabled or powered off
- 1/8-unit load receiver input impedance, allowing up to 256 transceivers on one bus
Applications
- Low power RS-485 applications
- EMI sensitive systems
- DTE to DCE interfaces
- Industrial control systems
- Packet switching and local area networks
- Level translators
Q & A
- What is the primary function of the ADM4850ARZ?
The ADM4850ARZ is a half-duplex RS-422/RS-485 transceiver designed for high-speed data communication on multipoint bus transmission lines.
- What is the maximum number of transceivers that can be connected on a single bus?
Up to 256 transceivers can be connected on a single bus due to the 1/8-unit load receiver input impedance.
- What is the operating temperature range of the ADM4850ARZ?
The operating temperature range is -40°C to +85°C.
- What is the typical data rate of the ADM4850ARZ?
The typical data rate is 115 kbps, but it can go up to 250 kbps maximum.
- Is the ADM4850ARZ RoHS compliant?
- What type of package does the ADM4850ARZ come in?
The ADM4850ARZ comes in an 8-lead SOIC (Small Outline IC) package.
- What is the bus common-mode range of the ADM4850ARZ?
The bus common-mode range is -7 V to +12 V.
- Does the ADM4850ARZ have thermal shutdown and short-circuit protection?
- What is the receiver hysteresis of the ADM4850ARZ?
The receiver hysteresis is 20 mV.
- Is the ADM4850ARZ pin-compatible with other devices?
