ADM202EARUZ

Overview

The ADM202EARUZ is a dual-channel RS-232 transceiver manufactured by Analog Devices, designed for robust communication in electrically noisy environments. It operates from a single 5 V power supply (4.5 V to 5.5 V) and supports data rates up to 230 kbps. The device features integrated charge-pump circuitry requiring four external 0.1 µF capacitors to generate the necessary ±10 V internal supplies. It provides comprehensive ESD protection rated at ±15 kV air discharge and ±8 kV contact discharge per IEC1000-4-2 standards, along with EFT immunity of ±2 kV. Packaged in a 16-lead TSSOP, it includes internal 5 kΩ pull-down resistors on receiver inputs and Schmitt-trigger characteristics for noise immunity.

Feature Summary

• Compliant with EU EMC directives including EN55022 emissions limits
• Integrated high-voltage protection against electrostatic discharge and electrical fast transients
• Controlled slew rate design minimizes electromagnetic interference during signal transitions
• Schmitt-trigger receivers ensure stable logic output despite slow input signal edges

Applications

• General-purpose RS-232 data links
• Portable instruments requiring low power consumption
• Personal Digital Assistants (PDAs)
• Industrial equipment operating in harsh electrical environments

Procurement Notes

Verify the specific ordering suffix RUZ corresponds to the TSSOP-16 package configuration when sourcing components. Confirm that the required external capacitors are included in the bill of materials, as the device relies on them for voltage conversion. Ensure handling procedures account for the device's sensitivity to static discharge despite its built-in protection features.

Selection Notes

Select this component when upgrading legacy MAX202E or ADM232L designs that require enhanced EMC performance without changing the pinout. It is suitable for applications needing full-duplex communication at speeds exceeding standard RS-232 specifications. Consider the TSSOP package dimensions if board space is constrained compared to traditional SOIC options.

Part Context

The ADM202E series serves as a direct pin-compatible upgrade for older generation RS-232 transceivers like the ADM202 and MAX202E. It belongs to a family of robust interface devices designed to replace standard CMOS drivers with versions capable of withstanding significant electrical stress. The device maintains compatibility with EIA-232E and CCITT V.28 specifications while offering improved reliability in portable and industrial settings.

Replacement Considerations

The ADM202EARWZ offers identical electrical functionality but utilizes a wide SOIC-16 package instead of TSSOP. The ADM202EARNZ provides the same performance in a narrow SOIC-16 footprint. Verify package compatibility before substitution to ensure mechanical fit on the printed circuit board.