ADM211AR

Overview

The ADM211AR is a CMOS RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single +5 V supply and includes on-board DC-to-DC converters to generate the required ±10 V levels for EIA-232-E communication interfaces. The device features four drivers and five receivers, supporting data rates up to 120 kB/s with an output voltage swing of ±9 V. It incorporates a low power shutdown mode that reduces supply current to less than 10 μA. The component is housed in a 28-lead SOIC_W package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates internal charge pump voltage converters to enable operation from a single 5 V digital supply without requiring external negative voltage sources.
• Features a low power shutdown control input that disables the charge pump and transmitters to minimize energy consumption in battery-powered applications.
• Includes an active-low enable input that places receiver outputs into a high impedance state, facilitating connection to microprocessor data buses or shared lines.

Applications

• Battery-powered equipment requiring low standby power
• Portable computers and peripherals
• Modems and printers
• Instruments with serial communication interfaces

Procurement Notes

Verify the specific ordering suffix to confirm the package type and RoHS compliance status. The 'AR' designation indicates a standard 28-lead SOIC_W package. Confirm the presence of the 'Z' suffix if lead-free manufacturing is required for the assembly process. Ensure the selected variant matches the required operating temperature range for the intended environment.

Selection Notes

Select the ADM211AR when a combination of four drivers and five receivers is necessary within a single interface solution. This part is suitable for designs where space constraints favor integrated charge pumps over discrete components. Consider the ADM213 if two receivers must remain active during shutdown for ring indicator monitoring, as the ADM211 disables all receivers in this state.

Part Context

The ADM211AR belongs to the ADM2xx family of RS-232 drivers and receivers designed to replace older solutions requiring dual voltage supplies. It serves as a direct pin-compatible replacement for legacy MAX206-MAX213 devices, allowing for easier migration in existing hardware designs while offering improved power efficiency through integrated CMOS technology and shutdown capabilities.

Replacement Considerations

The datasheet confirms pin compatibility with the MAX206-MAX211/213 series. Verify that the substitute device maintains identical pinout assignments and electrical characteristics to ensure seamless integration without PCB layout modifications.