Overview
The ADM3485EAR-REEL7 is a high-speed, low-power RS-485/RS-422 transceiver manufactured by Analog Devices Inc. This component is designed for half-duplex communication on multipoint bus transmission lines and is particularly suited for applications requiring high data rates and robust ESD protection.
The transceiver operates at a supply voltage of 3.3V and supports data rates up to 10 Mbps, making it suitable for a wide range of industrial and commercial applications. It features advanced protection mechanisms, including ±15 kV ESD protection on the RS-485 input/output pins and thermal shutdown to prevent excessive power dissipation.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | ||
| Part Number | ADM3485EAR-REEL7 | ||
| Package | SOIC-8 | ||
| Supply Voltage | 3.3 V ± 0.3 V | V | |
| Data Rate | Up to 10 Mbps | Mbps | |
| ESD Protection | ±15 kV (RS-485 input/output pins) | kV | Human body model |
| Receiver Input Impedance | 12 kΩ | kΩ | |
| Number of Nodes on the Bus | Up to 32 | ||
| Propagation Delay (Low to High) | 7 - 23 ns | ns | VCC = 3.3 V, TA = 25°C |
| Thermal Shutdown | Yes | Prevents excessive power dissipation |
Key Features
- TIA/EIA RS-485/RS-422 compliant
- High-speed data transmission up to 10 Mbps
- Low power consumption
- ±15 kV ESD protection on RS-485 input/output pins
- Thermal shutdown to prevent excessive power dissipation
- Fail-safe receiver design with open-circuit detection
- Driver and receiver enable pins for control
- High impedance state when driver or receiver is disabled
- Slew rate limited drivers to minimize EMI and reduce reflections
Applications
- Multipoint bus transmission lines in industrial and commercial environments
- Half-duplex communication systems
- Point-to-point and daisy-chain network topologies
- Line repeaters in extended network configurations
- Automotive, medical, and other applications requiring robust and high-speed serial communication
Q & A
- What is the maximum data rate supported by the ADM3485EAR-REEL7?
The ADM3485EAR-REEL7 supports data rates up to 10 Mbps.
- What is the supply voltage for the ADM3485EAR-REEL7?
The supply voltage is 3.3 V ± 0.3 V.
- What type of ESD protection does the ADM3485EAR-REEL7 offer?
The ADM3485EAR-REEL7 offers ±15 kV ESD protection on the RS-485 input/output pins.
- How many nodes can be connected on the bus using the ADM3485EAR-REEL7?
Up to 32 nodes can be connected on the bus.
- What is the receiver input impedance of the ADM3485EAR-REEL7?
The receiver input impedance is 12 kΩ.
- Does the ADM3485EAR-REEL7 have thermal shutdown protection?
Yes, it has thermal shutdown protection to prevent excessive power dissipation.
- What is the package type of the ADM3485EAR-REEL7?
The package type is SOIC-8.
- What are the typical applications of the ADM3485EAR-REEL7?
Typical applications include multipoint bus transmission lines, half-duplex communication systems, and point-to-point or daisy-chain network topologies.
- Does the ADM3485EAR-REEL7 have driver and receiver enable pins?
Yes, it has driver and receiver enable pins for control.
- What happens to the driver and receiver outputs when they are disabled?
When disabled, the driver and receiver outputs go into a high impedance state.
