Overview
The ADM3491EARZ is a 3.3V to 5V RS-485/RS-422 transceiver produced by Analog Devices Inc. This device is designed for full-duplex communication on multipoint bus transmission lines, making it suitable for balanced data transmission. It features differential outputs and is optimized for use in industrial automation, motor control, and other applications requiring robust and reliable communications over long distances.
Key Specifications
| Parameter | Value |
|---|---|
| Data Rate | 12 Mbps |
| Duplex | Full |
| Mounting Type | Surface Mount |
| Number of Drivers/Receivers | 1/1 |
| Operating Temperature | -40°C to +85°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Protocol | RS422, RS485 |
| Receiver Hysteresis | 50 mV |
| Supply Voltage | 3V to 3.6V |
| Receiver Input Impedance | 12 kΩ |
| ESD Protection | ±15 kV (HBM) |
Key Features
- TIA/EIA RS-485/RS-422 compliant
- ±15 kV ESD protection on RS-485 input/output pins
- Low power shutdown current
- Outputs high-Z when disabled or powered off
- Thermal shutdown and short-circuit protection
- Industry-standard 75176 pinout
- Fail-safe receiver design that maintains a high level at the receiver output when inputs are shorted or open
- Slew rate control for communication over long distances without introducing excessive noise
- Supports up to 32 nodes on the bus
Applications
- Power/energy metering
- Telecommunications
- EMI-sensitive systems
- Industrial control
- Local area networks
- Industrial automation
- Motor control
Q & A
- What is the data rate of the ADM3491EARZ?
The data rate of the ADM3491EARZ is 12 Mbps.
- What type of duplex operation does the ADM3491EARZ support?
The ADM3491EARZ supports full-duplex operation.
- What is the operating temperature range of the ADM3491EARZ?
The operating temperature range is -40°C to +85°C.
- What is the package type of the ADM3491EARZ?
The package type is 14-SOIC (0.154", 3.90mm Width).
- What protocols does the ADM3491EARZ support?
The ADM3491EARZ supports RS422 and RS485 protocols.
- What is the receiver input impedance of the ADM3491EARZ?
The receiver input impedance is 12 kΩ.
- Does the ADM3491EARZ have ESD protection?
Yes, the ADM3491EARZ has ±15 kV ESD protection on RS-485 input/output pins.
- What is the supply voltage range of the ADM3491EARZ?
The supply voltage range is 3V to 3.6V.
- Does the ADM3491EARZ have a low power shutdown mode?
Yes, the ADM3491EARZ has a low power shutdown mode.
- What is the maximum number of nodes supported on the bus by the ADM3491EARZ?
The ADM3491EARZ supports up to 32 nodes on the bus.
