Overview
The ADM1490EBRMZ is a high-speed, full-duplex RS-485/RS-422 transceiver produced by Analog Devices Inc. This component is designed for balanced transmission lines and complies with the TIA/EIA-485-A-98 standard. It is particularly suited for high-speed motor control applications that require data rates up to 16 Mbps. The device features robust protection mechanisms, including ±8 kV ESD protection on the RS-485 input/output pins, short-circuit protection, and thermal shutdown to prevent excessive power dissipation.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Data Rate | 16 | Mbps | |
| Driver/Receiver | 1/1 | ||
| Duplex Mode | Full | ||
| Receiver Hysteresis | 30 | mV | |
| Voltage Supply | 4.75 to 5.25 | V | |
| Operating Temperature Range | -40 to 85 | °C | |
| Package | 8-SOIC, 8-MSOP | ||
| Receiver Input Impedance | 12 kΩ | For unit load RS-485 operation | |
| Short-Circuit Current | ±250 mA | During fault conditions | |
| Thermal Shutdown Temperature | 150 | °C |
Key Features
- Full-duplex RS-485/RS-422 interface supporting data rates up to 16 Mbps.
- Integrated receiver with 30mV hysteresis for enhanced noise rejection.
- ±8 kV ESD protection on RS-485 input/output pins using the human body model (HBM).
- Short-circuit protection limiting the maximum output current to ±250 mA during fault conditions.
- Thermal shutdown circuitry to prevent excessive power dissipation, forcing the driver outputs into a high impedance state if the die temperature exceeds 150°C.
- Fail-safe receiver design that results in a logic high output state if the inputs are unconnected (floating).
- Low propagation delay and minimal driver skew to minimize EMI interference.
- Operation from a single 5 V power supply.
Applications
- High-speed motor control applications requiring reliable and fast data transmission.
- Multipoint communication systems where full-duplex operation is necessary.
- Industrial automation and control systems.
- Automotive and aerospace applications where robust and reliable communication is critical.
- Any application requiring balanced transmission lines and compliance with TIA/EIA-485-A-98 standards.
Q & A
- What is the maximum data rate supported by the ADM1490EBRMZ?
The ADM1490EBRMZ supports data rates up to 16 Mbps.
- What type of ESD protection does the ADM1490EBRMZ offer?
The ADM1490EBRMZ offers ±8 kV ESD protection on RS-485 input/output pins using the human body model (HBM).
- What is the operating temperature range of the ADM1490EBRMZ?
The operating temperature range is -40°C to 85°C.
- What is the purpose of the thermal shutdown circuitry in the ADM1490EBRMZ?
The thermal shutdown circuitry prevents excessive power dissipation by forcing the driver outputs into a high impedance state if the die temperature exceeds 150°C.
- How does the fail-safe receiver design work in the ADM1490EBRMZ?
The fail-safe receiver design results in a logic high output state if the inputs are unconnected (floating).
- What is the receiver input impedance of the ADM1490EBRMZ?
The receiver input impedance is 12 kΩ, allowing up to 32 nodes on the bus.
- What type of packages is the ADM1490EBRMZ available in?
The ADM1490EBRMZ is available in 8-SOIC and 8-MSOP packages.
- Does the ADM1490EBRMZ support full-duplex operation?
Yes, the ADM1490EBRMZ supports full-duplex operation.
- What is the voltage supply range for the ADM1490EBRMZ?
The voltage supply range is 4.75 V to 5.25 V.
- What is the maximum short-circuit current limit for the ADM1490EBRMZ?
The maximum short-circuit current is limited to ±250 mA during fault conditions.
