Digital isolator instead of optocoupler

d_zero

Genius 4815 points

Other Parts Discussed in Thread: ISO1212, ISO1211

Hi All,

currently we are using optocoupler HCPL-063L to isolate our digital inputs.

And our input signals are 24V.

Do you have a solution with digital isolator that can support 24V input and 3.3V output ?

From the input side we only have 24V signal and GND and no power.

If you don't have digital isolator that can direct support 24V , maybe a combination of level translator from 24V to 3.3V and then digital isolator with integrated power?

Best Regards,

David.

over 3 years ago

+1 Koteshwar Rao over 3 years ago

TI__Guru 55815 points

Hi David,

Thanks for reaching out.

We have a dedicated device developed for industrial digital inputs and is designed to accept 24V and higher without any additional power inputs. Please take a look at ISO1211 (1-channel) or ISO1212 (2-channels). I copying below the direct link to ISO1211 and also copied are two application notes that describe, one on how it simplifies the device and the other on how to use the device for higher voltage inputs. Thanks.

https://www.ti.com/product/ISO1211

How To Simplify Isolated 24-V PLC Digital Input Module Designs (Rev. B)

How to Design Isolated Comparators for ±48V, 110V and 240V DC and AC Detection (Rev. A)

Regards,
Koteshwar Rao

Isolation

Isolation forum

Digital isolator instead of optocoupler