Overview
The ADM4854ARZ is a differential line transceiver designed by Analog Devices Inc. for high-speed, full-duplex data communication on multipoint bus transmission lines. This device is particularly suited for applications requiring reliable and efficient data transmission over long distances. It features dedicated differential line driver outputs and receiver inputs, enabling it to support up to 256 transceivers on a single bus. The transceiver is compliant with EIA RS-485 and RS-422 standards, making it versatile for various communication protocols.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Protocol | RS422, RS485 | |
| Number of Drivers/Receivers | 1/1 | |
| Duplex Mode | Full | |
| Data Rate | 115 kbps | |
| Supply Voltage | 4.75 V to 5.25 V | V |
| Operating Temperature | -40°C to +85°C | °C |
| Package Type | 8-lead SOIC (Standard Small Outline Package) | |
| Bus Common-Mode Range | -7 V to +12 V | V |
| Rise/Fall Times | 600 ns min to 2400 ns max | ns |
| Thermal Shutdown and Short-Circuit Protection | Yes |
Key Features
- True fail-safe receiver inputs ensuring a logic high output level when inputs are open or shorted.
- Reduced slew rates for low electromagnetic interference (EMI).
- Outputs are high-Z when disabled or powered off to avoid bus overloading.
- Thermal shutdown and short-circuit protection for enhanced reliability.
- Low power consumption with a maximum supply current of 5 µA in shutdown mode.
- Supports up to 256 transceivers on one bus due to 1/8-unit load receiver input impedance.
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 ADM4854ARZ?
The ADM4854ARZ is a differential line transceiver designed for high-speed, full-duplex data communication on multipoint bus transmission lines.
- What communication protocols does the ADM4854ARZ support?
The ADM4854ARZ supports EIA RS-485 and RS-422 protocols.
- What is the maximum data rate of the ADM4854ARZ?
The maximum data rate of the ADM4854ARZ is 115 kbps.
- What is the operating temperature range of the ADM4854ARZ?
The operating temperature range is -40°C to +85°C.
- What type of package does the ADM4854ARZ come in?
The ADM4854ARZ comes in an 8-lead SOIC (Standard Small Outline Package).
- Does the ADM4854ARZ have thermal shutdown and short-circuit protection?
Yes, the ADM4854ARZ has thermal shutdown and short-circuit protection.
- How many transceivers can be connected on one bus using the ADM4854ARZ?
Up to 256 transceivers can be connected on one bus.
- What is the purpose of the true fail-safe feature in the receiver inputs?
The true fail-safe feature ensures a logic high output level when the inputs are open or shorted.
- How does the ADM4854ARZ reduce electromagnetic interference (EMI)?
The ADM4854ARZ reduces EMI through reduced slew rates.
- What happens to the outputs when the driver is disabled or powered off?
The outputs are high-Z when the driver is disabled or powered off to avoid bus overloading.
