Overview
The ADM3491ARZ-1REEL7 is a high-speed, full-duplex differential bus transceiver designed by Analog Devices Inc. This component operates with a single 3.3 V power supply and is compliant with both EIA RS-485 and RS-422 standards. It is fabricated using BiCMOS technology, combining low power CMOS with fast switching bipolar technology, making it ideal for power-sensitive applications. The transceiver features low power consumption, a shutdown mode, and thermal shutdown protection, making it suitable for communication on multipoint bus transmission lines.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3.3 V ± 0.3 V | V |
| Operating Temperature | -40°C to +85°C | °C |
| Data Rate | Up to 20 Mbps | Mbps |
| Supply Current | 840 μA | μA |
| Shutdown Current | 2 nA | nA |
| Input Impedance | 19 kΩ | kΩ |
| Number of Transceivers on Bus | Up to 50 | - |
| Package Type | 14-Lead Narrow Body Small Outline (SOIC) | - |
| Skew Time | 8 ns | ns |
| Short-Circuit Protection | Yes | - |
| Thermal Shutdown | Yes | - |
Key Features
- Operates with a single 3.3 V power supply
- EIA RS-422 and RS-485 compliant over full common-mode range
- Low power consumption with 840 μA supply current and 2 nA shutdown current
- Full-duplex data transfer capability
- Up to 50 transceivers can be connected on the bus due to 19 kΩ input impedance
- Short-circuit protection and thermal shutdown for fault conditions
- Interoperable with 5 V logic
- Meets IEC1000-4-4 (>1 kV) for ESD protection
- Fail-safe feature for unconnected or floating receiver inputs
Applications
- Telecommunications: DTE–DCE interface, packet switching
- Local area networks
- Data concentration and data multiplexers
- Integrated services digital network (ISDN) and AppleTalk
- Industrial controls
Q & A
- What is the operating voltage of the ADM3491ARZ-1REEL7?
The operating voltage is 3.3 V ± 0.3 V.
- What is the maximum data rate supported by the ADM3491ARZ-1REEL7?
The maximum data rate is up to 20 Mbps.
- What is the typical supply current of the ADM3491ARZ-1REEL7?
The typical supply current is 840 μA.
- What type of protection does the ADM3491ARZ-1REEL7 have against short circuits?
The component has short-circuit protection and thermal shutdown.
- How many transceivers can be connected on the bus with the ADM3491ARZ-1REEL7?
Up to 50 transceivers can be connected due to the 19 kΩ input impedance.
- What is the skew time of the ADM3491ARZ-1REEL7?
The skew time is 8 ns.
- Is the ADM3491ARZ-1REEL7 interoperable with 5 V logic?
Yes, it is interoperable with 5 V logic.
- What is the shutdown current of the ADM3491ARZ-1REEL7?
The shutdown current is 2 nA.
- What are the common applications of the ADM3491ARZ-1REEL7?
Common applications include telecommunications, local area networks, data concentration, ISDN, AppleTalk, and industrial controls.
- What type of package does the ADM3491ARZ-1REEL7 come in?
The component comes in a 14-Lead Narrow Body Small Outline (SOIC) package.
