Overview
The ADM485ARMZ-REEL7, produced by Analog Devices Inc., is a differential line transceiver designed for high-speed bidirectional data communication on multipoint bus transmission lines. It complies with EIA standards RS-485 and RS-422, making it suitable for balanced data transmission. The device operates from a single 5 V power supply and is fabricated using BiCMOS technology, combining the benefits of low power CMOS and fast switching bipolar technology.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Data Rate | 5 Mbps | Maximum data transmission rate |
| Supply Voltage | 5 V | Single power supply voltage |
| Bus Common-Mode Range | -7 V to +12 V | Range of common-mode voltage on the bus |
| Driver Propagation Delay | 10 ns (typical) | Time delay for the driver to propagate the signal |
| Receiver Propagation Delay | 15 ns (typical) | Time delay for the receiver to propagate the signal |
| Receiver Hysteresis | 70 mV | Hysteresis voltage to improve noise immunity |
| Package Type | 8-TSSOP, 8-MSOP | Package types available for the component |
| Operating Temperature Range | -40°C to 85°C | Range of temperatures within which the device can operate |
Key Features
- Meets EIA RS-485 and RS-422 standards
- High-speed, low-power BiCMOS technology
- Thermal shutdown protection to prevent excessive power dissipation
- Short-circuit protection for driver outputs
- High-Z outputs when power is off or driver is disabled
- Fail-safe receiver output that defaults to a logic high state if inputs are unconnected
- ESD protection for all inputs and outputs
- High source and sink current capability for driver outputs
Applications
- Low power RS-485 systems
- DTE/DCE interfaces
- Packet switching
- Local area networks (LANs)
- Data concentration
- Data multiplexers
- Integrated services digital network (ISDN)
Q & A
- What is the primary function of the ADM485ARMZ-REEL7?
The ADM485ARMZ-REEL7 is a differential line transceiver designed for high-speed bidirectional data communication on multipoint bus transmission lines.
- What standards does the ADM485ARMZ-REEL7 comply with?
The device complies with EIA standards RS-485 and RS-422.
- What is the operating supply voltage of the ADM485ARMZ-REEL7?
The device operates from a single 5 V power supply.
- What is the maximum data rate supported by the ADM485ARMZ-REEL7?
The maximum data rate is 5 Mbps.
- What is the common-mode voltage range of the bus for the ADM485ARMZ-REEL7?
The bus common-mode voltage range is -7 V to +12 V.
- What protection features does the ADM485ARMZ-REEL7 have?
The device features thermal shutdown protection, short-circuit protection, and ESD protection for all inputs and outputs.
- How many transceivers can be connected on a bus simultaneously?
Up to 32 transceivers can be connected on a bus, but only one driver should be enabled at any time.
- What happens to the receiver output if the inputs are unconnected?
The receiver output defaults to a logic high state if the inputs are unconnected (floating).
- What is the typical driver propagation delay of the ADM485ARMZ-REEL7?
The typical driver propagation delay is 10 ns.
- What is the typical receiver propagation delay of the ADM485ARMZ-REEL7?
The typical receiver propagation delay is 15 ns.
