ADM1181AAN

Overview

The ADM1181AAN is a dual-channel RS-232 transceiver manufactured by Analog Devices Inc. It operates from a single 5 V power supply (4.5 V to 5.5 V) with a typical quiescent current of 6 mA. The device supports full-duplex communication at data rates up to 230 kbps. It features ±15 kV ESD protection on I/O lines and includes internal 5 kΩ pull-down resistors on receiver inputs. The component is housed in a 16-lead PDIP package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Compliant with EU EMC directive 89/336/EEC for low emissions and high immunity
• Integrated charge-pump voltage converter eliminates need for external negative supply
• Robust transient protection against electrostatic discharge and electrical fast transients
• Schmitt-trigger receivers ensure error-free data reception with noisy signals

Applications

• General-purpose RS-232 data links
• Portable instruments requiring low power consumption
• PDAs and handheld devices

Procurement Notes

Verify the specific ordering suffix 'AN' corresponds to the 16-lead PDIP package variant when sourcing. Confirm that the procurement channel provides documentation matching the Rev. C datasheet specifications. Ensure the component meets RoHS requirements as indicated in official manufacturer records before finalizing acquisition.

Selection Notes

Select this component for applications requiring robust electromagnetic compatibility without external shielding. It serves as a direct pin-compatible upgrade for older generation RS-232 transceivers like the LTC1181A. Consider the 230 kbps maximum data rate and single-supply operation when designing interface circuits for harsh electrical environments.

Part Context

The ADM1181A belongs to the ADM202E/ADM1181A family of rugged RS-232 line drivers and receivers. This series was designed to replace legacy components while offering enhanced EMI/EMC performance. The device utilizes CMOS technology to minimize power dissipation, making it suitable for battery-operated systems where efficiency is critical.

Replacement Considerations

The ADM1181A is documented as a pin-compatible upgrade for the LTC1181A. Designers replacing older transceivers should verify that the existing circuit layout accommodates the specific capacitor configurations required by the charge-pump architecture.