ADM485EARZ
Overview
The ADM485EAR is a 5V, half-duplex RS-485 and RS-422 transceiver designed for robust serial data communication at rates up to 2.5 Mbps. It features enhanced ESD protection on the bus pins and is pin-compatible with industry-standard 75176 devices. This transceiver is optimized for low power consumption, drawing only 0.3mA typical supply current while supporting up to 32 nodes on a single bus.
Why Choose This Part
This part offers integrated ESD protection and thermal shutdown to prevent damage from bus contention or short circuits. Its low 300 uA quiescent current makes it suitable for power-sensitive applications, while the 70 mV receiver hysteresis improves noise immunity. The 8-SOIC package provides a compact footprint that remains compatible with standard 5V logic levels.
Applications
Key Specifications
Getting Started
To implement the ADM485EARZ, connect the Driver Enable (DE) and Receiver Enable (RE) pins to a GPIO for direction control in half-duplex mode. Use a 120-ohm termination resistor at the farthest ends of the RS-485 bus to minimize reflections. Ensure the bypass capacitor is placed close to the Vcc pin (4.75V to 5.25V) to maintain signal integrity during high-speed switching.
ADM485 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Data Rate | Temp Range | Stock |
|---|---|---|---|
| ADM485EAR (this part) | 2.5M | -40degC ~ 85degC | 7,099 |
| ADM485ARZ (Analog Devices Inc.) | 5M | -40degC ~ 85degC | 5,585 |
| ADM485ARZ-REEL (Analog Devices Inc.) | 5M | -40degC ~ 85degC | 23,887 |
| ADM485JRZ-REEL (Analog Devices Inc.) | 5M | 0degC ~ 70degC | 4,646 |
| ADM485EARZ (Analog Devices Inc.) | 2.5M | -40degC ~ 85degC | 477 |
