Overview
The ADM4857ARZ is a high-performance, full-duplex RS-485/RS-422 transceiver produced by Analog Devices Inc. This device is designed for high-speed bidirectional data communication on multipoint bus transmission lines. It is part of the ADM4850 to ADM4857 series, which offers various data rate options to suit different application requirements.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Data Rate | 10 Mbps | Full-duplex operation | |
| Supply Voltage | 4.75 V to 5.25 V | V | |
| Temperature Range | -40°C to +85°C | °C | Commercial and industrial temperature ranges |
| Package Type | 8-lead NSOIC | ||
| Bus Common-Mode Range | -7 V to +12 V | V | |
| Propagation Delay | 0 to 30 ns | ns | RLDIFF = 54 Ω, CL1 = CL2 = 100 pF |
| Rise/Fall Times | 30 ns | ns | RLDIFF = 54 Ω, CL1 = CL2 = 100 pF |
| Thermal Shutdown | Yes | Prevents excessive power dissipation | |
| Short-Circuit Protection | Yes |
Key Features
- RS-485/RS-422 Compliance: Meets EIA RS-485/RS-422 standards for reliable data communication.
- High Data Rates: Supports up to 10 Mbps data rate in full-duplex mode.
- Low Electromagnetic Interference (EMI): Slew rate limited driver outputs to reduce EMI and data errors.
- True Fail-Safe Receiver Inputs: Ensures a logic high output level when the inputs are open or shorted.
- Thermal Shutdown and Short-Circuit Protection: Prevents excessive power dissipation and protects against short circuits.
- Low Power Consumption: Maximum supply current of 5 µA in shutdown mode.
- Multi-Transceiver Capability: Allows up to 256 transceivers on one bus.
Applications
- Industrial Automation: Suitable for use in industrial control systems and automation networks.
- Telecommunications: Used in telecommunications equipment for reliable data transmission.
- Medical Devices: Can be used in medical devices requiring high-speed data communication.
- Automotive Systems: Applicable in automotive systems for data communication between different modules.
- Building Automation: Used in building automation systems for controlling and monitoring various parameters.
Q & A
- What is the maximum data rate of the ADM4857ARZ?
The maximum data rate of the ADM4857ARZ is 10 Mbps in full-duplex mode.
- What is the operating temperature range of the ADM4857ARZ?
The operating temperature range is -40°C to +85°C).
- What type of package is the ADM4857ARZ available in?
The ADM4857ARZ is available in an 8-lead NSOIC package).
- Does the ADM4857ARZ have thermal shutdown protection?
Yes, the ADM4857ARZ has thermal shutdown protection to prevent excessive power dissipation).
- How many transceivers can be connected on one bus with the ADM4857ARZ?
Up to 256 transceivers can be connected on one bus).
- What is the supply voltage range for the ADM4857ARZ?
The supply voltage range is 4.75 V to 5.25 V).
- Does the ADM4857ARZ have slew rate limited outputs?
Yes, the driver outputs are slew rate limited to reduce EMI and data errors).
- What is the propagation delay of the ADM4857ARZ?
The propagation delay is 0 to 30 ns).
- Is the ADM4857ARZ compliant with RS-485/RS-422 standards?
Yes, the ADM4857ARZ is compliant with EIA RS-485/RS-422 standards).
- What is the maximum supply current in shutdown mode for the ADM4857ARZ?
The maximum supply current in shutdown mode is 5 µA).
