Overview
The ADM3485ARZ is a 3.3 V, slew rate limited, half-duplex RS-485/RS-422 transceiver produced by Analog Devices Inc. This integrated circuit is designed for bidirectional data communication on multipoint bus transmission lines, offering robust features for reliable and efficient data transmission.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 3.3 V |
| Data Rate | Up to 10 Mbps |
| Temperature Range | -40°C to +85°C |
| Package Type | 8-Lead Narrow Body Small Outline (SOIC_N) |
| Receiver Input Impedance | 12 kΩ |
| Driver Output Protection | Current limit protection and thermal shutdown |
| Propagation Delay Skew | Typically under 10 ns for receiver, 8 ns for driver |
| Bus Length | Up to 4000 feet |
Key Features
- Slew rate limited drivers to minimize EMI and reduce reflections caused by improperly terminated cables.
- Thermal shutdown circuit to prevent excessive power dissipation during fault conditions.
- Fail-safe feature: receiver outputs a logic high state if inputs are unconnected (floating).
- High impedance driver and receiver outputs when disabled.
- Support for up to 32 transceivers on the bus.
- Low power consumption.
Applications
The ADM3485ARZ is suitable for various applications involving half-duplex bidirectional data communications. These include:
- Multipoint bus transmission lines.
- Daisy-chain network topology.
- Point-to-point communication.
- Line repeater applications.
Q & A
- What is the maximum data rate of the ADM3485ARZ?
The ADM3485ARZ can transmit data at rates up to 10 Mbps. - What is the operating voltage of the ADM3485ARZ?
The operating voltage is 3.3 V. - What is the temperature range for the ADM3485ARZ?
The temperature range is -40°C to +85°C. - What type of package does the ADM3485ARZ come in?
The ADM3485ARZ comes in an 8-Lead Narrow Body Small Outline (SOIC_N) package. - How many transceivers can be connected on the bus?
Up to 32 transceivers can be connected on the bus. - What protection mechanisms are included in the ADM3485ARZ?
The ADM3485ARZ includes current limit protection and a thermal shutdown circuit to prevent excessive power dissipation. - What happens if the inputs are unconnected (floating)?
If the inputs are unconnected, the receiver outputs a logic high state. - What is the maximum bus length supported by the ADM3485ARZ?
The maximum bus length supported is up to 4000 feet. - Is the ADM3485ARZ suitable for full-duplex applications?
No, the ADM3485ARZ is a half-duplex transceiver. - How does the slew rate limiting feature benefit the ADM3485ARZ?
The slew rate limiting feature minimizes EMI and reduces reflections caused by improperly terminated cables, ensuring error-free data transmission.
