Overview
The ADM3491ARU-1REEL7 is a low-power, full-duplex differential line transceiver produced by Analog Devices Inc. This component is designed to operate using a single 3.3 V power supply, making it ideal for power-sensitive applications. It is compliant with both EIA RS-485 and RS-422 standards, ensuring reliable and balanced data transmission over multipoint bus transmission lines. The ADM3491-1, the base model of this component, features a differential line driver and a differential line receiver, enabling full-duplex data transfer.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 3.3 V ± 0.3 V | V |
| Supply Current (ICC) | 840 μA | μA |
| Shutdown Current | 2 nA | nA |
| Data Rate | 20 Mbps | Mbps |
| Input Impedance | 19 kΩ | kΩ |
| Number of Transceivers on Bus | Up to 50 | - |
| Propagation Delay (TPLH, TPHL) | 25 - 115 ns | ns |
| Skew (TPLH - TPHL) | 20 ns | ns |
| Short-Circuit Protection | Yes | - |
| Thermal Shutdown | Yes | - |
| Package Types | PDIP, SOIC, TSSOP | - |
Key Features
- Operates with a single 3.3 V power supply.
- Compliant with EIA RS-485 and RS-422 standards over the full common-mode range.
- Low power consumption with 840 μA supply current and 2 nA shutdown current.
- Supports up to 50 transceivers on the bus.
- 20 Mbps data rate.
- Short-circuit protection and thermal shutdown for fault conditions.
- Interoperable with 5 V logic.
- Meets IEC1000-4-4 (>1 kV) and has an 8 ns skew.
- Available in PDIP, SOIC, and TSSOP packages.
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 ADM3491ARU-1REEL7?
The operating voltage is 3.3 V ± 0.3 V.
- What is the data rate supported by this transceiver?
The data rate is up to 20 Mbps.
- How many transceivers can be connected on the bus?
Up to 50 transceivers can be connected on the bus.
- What are the key protection features of this component?
The component features short-circuit protection and thermal shutdown.
- What are the available package types for this component?
The component is available in PDIP, SOIC, and TSSOP packages.
- Is the ADM3491ARU-1REEL7 interoperable with 5 V logic?
Yes, it is interoperable with 5 V logic.
- What is the supply current and shutdown current of this component?
The supply current is 840 μA, and the shutdown current is 2 nA.
- Does the ADM3491ARU-1REEL7 meet any specific industry standards for immunity?
Yes, it meets IEC1000-4-4 (>1 kV).
- What is the propagation delay and skew of this transceiver?
The propagation delay (TPLH, TPHL) is 25 - 115 ns, and the skew is 20 ns.
- Is the ADM3491ARU-1REEL7 suitable for industrial control applications?
Yes, it is suitable for industrial control applications.
