ADM202EARU

Overview

The ADM202EARU is a dual-channel RS-232 transceiver manufactured by Analog Devices, designed for operation from a single 5 V power supply. It supports data rates up to 230 kbps and features ±15 kV ESD protection on all I/O lines. The device includes an internal charge-pump voltage converter requiring four external 0.1 µF capacitors. It operates within a temperature range of -40°C to +85°C and draws a typical supply current of 6 mA under no-load conditions.

Feature Summary

• Complies with the EU EMC directive (89/336/EEC) with low electromagnetic emissions.
• Provides robust electrostatic discharge protection exceeding ±15 kV on all input/output lines.
• Features high slew rate control to minimize interference while supporting high-speed data transmission.
• Offers a pin-compatible upgrade solution for legacy MAX202E and LT1181A interface devices.

Applications

• General-purpose RS-232 data links
• Portable instruments
• Personal Digital Assistants (PDAs)

Procurement Notes

Verify the specific package variant against project requirements, as the 'RU' suffix indicates a TSSOP-16 package. Confirm that the ordering suffix aligns with the desired manufacturing specifications. Ensure compatibility with existing PCB footprints before finalizing procurement decisions.

Selection Notes

Select this component when operating from a single 5 V supply is required without external negative voltage generation. It is suitable for environments demanding high immunity to electrical fast transients and radiated fields. Consider the TSSOP package for space-constrained designs compared to standard SOIC options.

Part Context

The ADM202E series serves as a robust enhancement to the ADM230–ADM241 family. It provides improved electromagnetic compatibility and transient protection over previous generations. The device maintains functional compatibility with older RS-232 standards while offering higher speed capabilities.

Replacement Considerations

The ADM202E is a direct pin-compatible replacement for the MAX202E, ADM232L, and LT1181A. Verify that the substitute part number matches the original design's package type and thermal requirements.

FAQ

How does the ADM202E handle unconnected receiver inputs?

Each receiver input contains an internal 5 kΩ pull-down resistor to ground. This ensures that unconnected inputs default to a Logic 1 output level, preventing floating states.

What is the maximum data rate supported by this device?

The device guarantees a maximum data rate of 230 kbps under worst-case loading conditions, making it suitable for high-speed ISDN modem standards.

Does the device require external components for voltage conversion?

Yes, the internal charge-pump requires four external capacitors (typically 0.1 µF) to generate the necessary positive and negative supply voltages from the single 5 V input.