Overview
The ADM3491ARZ is a low-power, full-duplex differential line transceiver designed by Analog Devices Inc. It operates using a single 3.3 V power supply and is compliant with both EIA RS-485 and RS-422 standards. This transceiver is suitable for balanced data transmission on multipoint bus transmission lines and is ideal for power-sensitive applications due to its low power consumption and shutdown mode.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage | 3.3 | V |
| Maximum Supply Current | 840 | μA |
| Shutdown Current | 2 | nA |
| Maximum Operating Temperature | 85 | °C |
| Data Rate | Up to 20 | Mbps |
| Duplex Mode | Full Duplex | |
| Receiver Input Impedance | 19 kΩ | |
| Receiver Hysteresis | 50 mV | |
| Package Type | 14-Lead Narrow Body Small Outline (SOIC_N) | |
| ESD Protection Voltage | No ESD protection, but meets IEC1000-4-4 (>1 kV) |
Key Features
- Operates with a single 3.3 V power supply.
- Compliant with EIA RS-485 and RS-422 standards.
- Full-duplex data transfer capability.
- Low power consumption with a typical supply current of 840 μA.
- Shutdown mode with a current draw of 2 nA.
- Thermal shutdown circuit to prevent excessive power dissipation.
- Fail-safe feature that results in a logic high output state when inputs are unconnected (floating).
- Short-circuit protection.
- Up to 50 transceivers can be connected on the bus.
Applications
- Telecommunications: DTE–DCE interface, packet switching.
- Local area networks.
- Data concentration and data multiplexers.
- Integrated services digital network (ISDN).
- Industrial controls.
- AppleTalk networks.
Q & A
- What is the operating supply voltage of the ADM3491ARZ?
The operating supply voltage is 3.3 V.
- What is the maximum data rate of the ADM3491ARZ?
The maximum data rate is up to 20 Mbps.
- What is the duplex mode of the ADM3491ARZ?
The ADM3491ARZ operates in full-duplex mode.
- How many transceivers can be connected on the bus?
Up to 50 transceivers can be connected on the bus.
- What is the shutdown current of the ADM3491ARZ?
The shutdown current is 2 nA.
- Does the ADM3491ARZ have ESD protection?
No, it does not have ESD protection, but it meets IEC1000-4-4 (>1 kV) standards.
- What is the receiver input impedance of the ADM3491ARZ?
The receiver input impedance is 19 kΩ.
- What is the maximum operating temperature of the ADM3491ARZ?
The maximum operating temperature is 85°C.
- What package type is the ADM3491ARZ available in?
The ADM3491ARZ is available in a 14-Lead Narrow Body Small Outline (SOIC_N) package.
- Does the ADM3491ARZ have thermal shutdown protection?
Yes, it has a thermal shutdown circuit to prevent excessive power dissipation.
