Overview
The ADM4850ARZ-REEL7 is a half-duplex RS-485/RS-422 transceiver produced by Analog Devices Inc. This device is designed for high-speed data transmission and is part of the ADM4850 to ADM4857 series, which offers various data rate options. The ADM4850 specifically operates at a data rate of 115 kbps, making it suitable for a wide range of industrial and commercial applications. It is available in an 8-lead SOIC package and is fully specified over the temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value | Unit | Test Conditions |
|---|---|---|---|
| Data Rate | 115 kbps | - | - |
| Duplex Mode | Half-Duplex | - | - |
| Supply Voltage | 4.75 V to 5.25 V | V | - |
| Operating Temperature | -40°C to +85°C | °C | - |
| Package Type | 8-Lead SOIC | - | - |
| Bus Common-Mode Range | -7 V to +12 V | V | - |
| Propagation Delay | 50 ns to 180 ns | ns | RLDIFF = 54 Ω, CL1 = CL2 = 100 pF |
| Rise/Fall Times | 140 ns to 2400 ns | ns | RLDIFF = 54 Ω, CL1 = CL2 = 100 pF |
| Enable Time | 2000 ns | ns | RL = 500 Ω, CL = 100 pF |
| Disable Time | 2000 ns | ns | RL = 500 Ω, CL = 15 pF |
Key Features
- Compliance with RS-485/RS-422 Standards: The ADM4850 is compliant with EIA RS-485 and RS-422 standards, ensuring compatibility with a wide range of systems.
- Low Electromagnetic Interference (EMI): The device features reduced slew rates to minimize EMI and data errors caused by reflections from improperly terminated buses.
- True Fail-Safe Receiver Inputs: The receiver inputs have a true fail-safe feature, ensuring a logic high output level when the inputs are open or shorted.
- Thermal Shutdown and Short-Circuit Protection: The device includes thermal shutdown and short-circuit protection to prevent excessive power dissipation.
- High-Z Outputs When Disabled or Powered Off: The outputs are high-Z when the device is disabled or powered off, preventing bus overload.
- Low Power Consumption: The device has a low supply current of 5 µA (maximum) in shutdown mode.
Applications
The ADM4850ARZ-REEL7 is suitable for various applications, including:
- Industrial Automation: For controlling and monitoring industrial equipment.
- Building Automation: For HVAC, lighting, and security systems.
- Medical Devices: For communication in medical equipment and systems.
- Transportation Systems: For communication in vehicle networks and traffic control systems.
- Point-of-Sale Terminals and Kiosks: For reliable data transmission in retail environments.
Q & A
- What is the data rate of the ADM4850ARZ-REEL7?
The data rate of the ADM4850ARZ-REEL7 is 115 kbps. - What is the operating temperature range of the ADM4850ARZ-REEL7?
The operating temperature range is -40°C to +85°C. - What package types are available for the ADM4850?
The ADM4850 is available in 8-lead SOIC, 8-lead LFCSP, and 8-lead MSOP packages. - Is the ADM4850 compliant with RS-485/RS-422 standards?
Yes, the ADM4850 is compliant with EIA RS-485 and RS-422 standards. - What is the bus common-mode range of the ADM4850?
The bus common-mode range is -7 V to +12 V. - Does the ADM4850 have thermal shutdown protection?
Yes, the device includes 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 is the supply voltage range for the ADM4850?
The supply voltage range is 4.75 V to 5.25 V. - Does the ADM4850 have fail-safe receiver inputs?
Yes, the receiver inputs have a true fail-safe feature. - What is the maximum supply current in shutdown mode?
The maximum supply current in shutdown mode is 5 µA.
