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ISO7221CDR isolator module

Overview

This project is used to verify the module design of the ISO7221CDR isolator chip of Lichuang Mall.

Known compatible models are as follows

Component model
ISO7221CDR
ISO7321CDR
ISO7221ADR

For more compatible models, please refer to the relevant component manuals to determine.

The difference between ISO7**0 and ISO7**1

The input and output terminals of the two channels ending in 0 are on the same side, and the input and output terminals of the two channels ending in 1 are on opposite sides.

The channel layout of ISO7**0 is as follows

Enter A	OutputA
Enter B	OutputB

The channel layout of ISO7**1 is as follows

Enter A	OutputA
OutputB	Enter B

If there is any discrepancy, refer to the manual of the corresponding component.

Test Methods

Two isolated power supplies are provided on VCC1, GND1 and VCC2, GND2 on both sides. The voltage value is within the corresponding allowable voltage range of the chip. (For ISO7221CDR, this range is 2.8~5.5V)

Provide an input signal on the IN port, the signal frequency is no higher than the signal frequency, and connect an oscilloscope to the OUT port to observe the output waveform.

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-05-22 12:32:41

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