ADM202EARNZ-REEL

Overview

The ADM202EARNZ-REEL is a dual-channel RS-232 line driver and receiver manufactured by Analog Devices Inc. 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 robust electromagnetic compatibility, including ±15 kV ESD protection on all I/O lines and compliance with IEC1000-4-2 and IEC1000-4-4 standards. The component is housed in a 16-lead SOIC package.

Feature Summary

• Complies with EU EMC directive 89/336/EEC for low emissions and high immunity
• Provides ±15 kV electrostatic discharge protection on all input and output pins
• Features Schmitt-trigger receivers with hysteresis for noise immunity
• Includes internal 5 kΩ pull-down resistors on receiver inputs

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required packaging format. Confirm the temperature grade corresponds to the industrial range specifications. Ensure the component version aligns with the latest datasheet revision to guarantee parameter accuracy.

Selection Notes

Select this component when a pin-compatible upgrade for older ADM202 or MAX202E devices is required. It is suitable for applications demanding high-speed transmission up to 230 kbps. Consider its robust EMI performance for environments with significant electrical noise.

Part Context

This part belongs to the ADM202E family of RS-232 transceivers. It serves as an enhanced replacement for legacy interface chips like the ADM232L and LT1181A. The series is designed for CMOS technology to minimize power consumption while maintaining high reliability.

Replacement Considerations

ADM202EARNZ

FAQ

What is the function of the internal pull-down 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 protection against electrical fast transients (EFT) up to ±2 kV, complying with the IEC1000-4-4 standard.

What is the typical transmitter output voltage swing?

When driven by a 5 V supply, the transmitter outputs typically swing to ±9 V under load conditions.