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NNTP-Posting-Date: Fri, 31 May 2024 17:21:34 +0000
From: john larkin <jl@650pot.com>
Newsgroups: sci.electronics.design
Subject: Re: Optocoupler datasheets
Date: Fri, 31 May 2024 10:21:34 -0700
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On Fri, 31 May 2024 11:57:14 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:

>"john larkin" <jl@650pot.com> wrote in message news:050h5jlbdtnavt2aoo037j9p89eu4613af@4ax.com...
>> On Thu, 30 May 2024 11:29:18 -0000 (UTC), Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>>piglet <erichpwagner@hotmail.com> wrote:
>>>> On 29/05/2024 17:39, Phil Hobbs wrote:
>>>>> On 2024-05-29 11:56, piglet wrote:
>>>>>> bitrex <user@example.net> wrote:
>>>>>>> Optocoupler datasheets seem like kind of a mess, I try not to use them
>>>>>>> too often in situations where there's any kind of power budget because
>>>>>>> other than "shove some relatively huge current through the LED like 5-10
>>>>>>> mA" it's hard to know what you can get away with.
>...
>>
>> But the really good logic couplers these days aren't optical.
>>
>
>Have you used anything like these?
>https://www.digchip.com/datasheets/parts/datasheet/477/ISO485P.php
>
>What other methods are available which can cope with communication between equipment on different power line phases?
>Apart from the obvious transformer isolation used in computer networking?
>And RF isolation such as Wireless networking and Bluetooth. 
>

We use isolated ADCs (like ADUM7703) and logic isolators (like the
ADUM1400 series.) Some newer ADCs and isolators include the isolated
dc/dc converter to power the high side, which is very cool.

There are some cheap electrical-metering multichannel ADCs that
include the power isolation.

There are also isolated mosfet gate drivers.