ADM202EARNZ-REEL7

Overview

The ADM202EARNZ-REEL7 is a dual-channel RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single +5 V power supply with a voltage range of 4.5 V to 5.5 V. The device supports data rates up to 230 kbps and features integrated charge-pump circuitry requiring four external 0.1 µF capacitors. It provides ±15 kV ESD protection on all I/O lines, complies with the 89/336/EEC EMC directive, and includes internal 5 kΩ pull-down resistors on receiver inputs. The component is housed in a 16-lead SOIC package.

Feature Summary

• Compliant with EU EMC directives for low electromagnetic emissions
• Integrated ESD protection rated at ±15 kV air-gap discharge
• High-speed transmission capability supporting 230 kbps data rates
• Single-supply operation utilizing internal charge-pump voltage conversion

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required reel packaging configuration. Confirm the specific temperature grade corresponds to the industrial rating (-40°C to +85°C). Ensure the component version aligns with the Rev. C datasheet specifications regarding hysteresis levels and pin compatibility before finalizing procurement orders.

Selection Notes

Select this component when upgrading existing ADM202 or MAX202E designs requiring enhanced EMI performance. It serves as a direct pin-compatible replacement for older generation transceivers while offering improved noise immunity. Consider the TSSOP option if board space constraints are critical, as it reduces footprint compared to standard SOIC packages.

Part Context

This part belongs to the ADM202E family, which represents an enhancement over the original ADM202 series. It is designed to replace legacy devices like the MAX202E and LT1181A while maintaining electrical compatibility. The 'E' designation indicates extended ESD protection and EMC compliance features not present in earlier iterations.

Replacement Considerations

ADM202EARNZ

FAQ

What is the function of the internal 5 kΩ resistors?

Each RS-232 receiver input contains an internal 5 kΩ pull-down resistor to ground. This ensures that unconnected inputs default to a Logic 1 output level.

How does the device handle fast transient bursts?

The ADM202E provides EFT protection up to ±2 kV per IEC1000-4-4 standards, allowing it to withstand electrical fast transient events without permanent damage.

What external components are required for operation?

Four external 0.1 µF capacitors are required to support the internal charge-pump voltage doubler and inverter circuits for generating the necessary RS-232 voltage levels.