WEBVTT
Kind: captions
Language: en

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♪ Electricity ♪

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Today we're demonstrating
a new board

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that's a 5-volt RS-485 node

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using the world's smallest
isolated DC-DC convertor

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and an isolated RS-485 transceiver.

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Only a 3.3-volt power supply is required.

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But as you can see, we get about
five volts on the bus lines.

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It's like magic!

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To prove it's really isolated,
we have a power supply

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between the controller and bus grounds.

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Varying that voltage
doesn't affect the circuit.

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Allowing different ground potentials

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eliminates ground loops

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for more reliable data transfer.

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Here's the demo board schematic.

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The ground potential is in red.

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The IL2985 is an isolated RS-485 transceiver.

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An ILDC11 isolates the power,
and a commodity regulator

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boosts the voltage from 3.3 to five volts.

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The ILDC11 is the world's
smallest isolated DC-DC convertor.

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It's 3.3 to 3.3-volts,

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quarter-watt output;

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it's fully regulated;

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full 2500 volts isolation;

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and a 125 Celsius temperature range.

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Click, e-mail, or call us for more information,
or to order parts or evaluation boards.