Overview
The ADM4850AR, produced by Analog Devices Inc., is a differential line transceiver designed for high-speed, half-duplex data communication on multipoint bus transmission lines. It complies with EIA Standards RS-485 and RS-422, making it suitable for balanced data transmission in various applications. This device is part of the ADM4850 to ADM4857 series, which offers different data rate options and configurations.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Data Rate | 115 kbps | - | - |
| Mode | Half-Duplex | - | - |
| Supply Voltage | 5 V ± 5% | V | - |
| Propagation Delay | 600 - 2500 ns | ns | tPLH, tPHL |
| Skew | 50 ns | ns | tSKEW |
| Rise/Fall Times | 140 ns | ns | tR, tF |
| Bus Common-Mode Range | -7 V to +12 V | V | - |
| Shutdown Current | 5 µA (maximum) | µA | DE = 0 V, RE = VCC |
| Temperature Range | -40°C to +85°C | °C | - |
| Package Options | 8-lead SOIC, 8-lead LFCSP, 8-lead MSOP | - | - |
Key Features
- Slew-rate limited driver outputs to reduce electromagnetic interference (EMI) and data errors caused by reflections from improperly terminated buses.
- True fail-safe receiver inputs.
- Thermal shutdown and short-circuit protection.
- Up to 256 transceivers can be connected on one bus.
- Outputs are high-Z when disabled or powered off.
- Pin-compatible with the MAX308x series.
Applications
- Low power RS-485 applications.
- EMI sensitive systems.
- DTE to DCE interfaces.
- Industrial control systems.
- Packet switching and local area networks.
- Level translators.
- Automotive applications.
Q & A
- What is the data rate of the ADM4850AR? The ADM4850AR has a data rate of 115 kbps.
- Is the ADM4850AR half-duplex or full-duplex? The ADM4850AR is a half-duplex transceiver.
- What is the supply voltage range for the ADM4850AR? The supply voltage range is 5 V ± 5%.
- What is the propagation delay of the ADM4850AR? The propagation delay is between 600 ns and 2500 ns.
- Does the ADM4850AR have thermal shutdown protection? Yes, it has thermal shutdown and short-circuit protection.
- How many transceivers can be connected on one bus? Up to 256 transceivers can be connected on one bus.
- What are the package options for the ADM4850AR? The package options include 8-lead SOIC, 8-lead LFCSP, and 8-lead MSOP.
- Is the ADM4850AR suitable for automotive applications? Yes, it is qualified for automotive applications.
- What is the bus common-mode range of the ADM4850AR? The bus common-mode range is -7 V to +12 V.
- What is the shutdown current of the ADM4850AR? The shutdown current is 5 µA (maximum) when DE = 0 V and RE = VCC.
