ADM211EARZ

Overview

The ADM211EARZ is a robust RS-232 and V.28 interface transceiver from Analog Devices, operating from a single 5 V power supply. It integrates four drivers and five receivers with full-duplex communication capability at data rates up to 230 kbps. The device features ±15 kV ESD protection on all I/O lines and complies with the EU EMC directive (89/336/EEC). It includes shutdown and enable control pins for power management. Operating within a temperature range of -40°C to +85°C, it utilizes a SOIC-28 package and requires four external 0.1 μF capacitors for its internal charge pump.

Feature Summary

• Complies with the EU directive on electromagnetic compatibility (EMC) including low EMI emissions.
• Provides high-level electrostatic discharge protection exceeding ±15 kV on all input/output lines.
• Integrates an internal charge pump requiring only four small external capacitors for operation.
• Features dedicated shutdown and enable control pins to minimize quiescent current consumption.

Applications

• Laptop computers
• Notebook computers
• Printers
• Peripherals
• Modems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and lead-free manufacturing details directly with the manufacturer or authorized distributors before procurement.

Selection Notes

Select this component when designing systems requiring multiple transmitter and receiver channels in a single package. Ensure the application environment meets the specified operating voltage and temperature ranges. Verify that the required data rate does not exceed the guaranteed maximum limit under worst-case loading conditions.

Part Context

This part belongs to the ADM2xxE family of ruggedized RS-232 line drivers and receivers. These devices are designed as plug-in upgrades for older MAX2xxE series products, facilitating easy design transitions while offering improved EMC performance and lower power consumption characteristics.

Replacement Considerations

The ADM211E is backward compatible with earlier ADM2xx products. Designers upgrading from legacy designs should verify pinout compatibility and ensure that external capacitor values meet the new requirements for optimal performance.

FAQ

How does the shutdown function operate on the ADM211E?

In shutdown mode, the charge pump is disabled, all transmitters are turned off, and all receiver outputs are placed in a high impedance state, reducing power consumption significantly.

What is the purpose of the Enable pin on the ADM211E?

The Enable pin allows the receiver outputs to be tristated independently of the shutdown state, facilitating data bus connections where high impedance states are required.

Does the ADM211E require external components for voltage generation?

Yes, the device requires four external 0.1 μF capacitors to support its internal charge pump, which generates the necessary positive and negative voltages for RS-232 signaling.