Multifunction DAQ

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Digital Output Specifications

The Digital Output Specifications of my AT-AO-10 are:

V OH output logic high voltage 2.4 V minimum
V OL output logic low voltage 0.5 V maximum


I OH output source current,
logic high 2.6 mA maximum
I OL output sink current,
logic low 24 mA maximum

What exactly does the current limit means? Does it mean that the card
wont be able to give me more than that current or that, even thought it
could posibly give that current, it is very possible to damage the card
if I demand more than that current?
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In article <3A34F6FE.6565503A@homer.ece.ohiou.edu>, Gorka Garcia
writes
>The Digital Output Specifications of my AT-AO-10 are:
>
>V OH output logic high voltage 2.4 V minimum
>V OL output logic low voltage 0.5 V maximum
>
>
>I OH output source current,
> logic high 2.6 mA maximum
>I OL output sink current,
> logic low 24 mA maximum
>
>What exactly does the current limit means? Does it mean that the card
>wont be able to give me more than that current or that, even thought it
>could posibly give that current, it is very possible to damage the card
>if I demand more than that current?
>
>
>
Source, conventional current flows out of the device.
Sink, conventional current flows
into the device.

The maximum current you can source from the device is 2.6mA without the
logic state 1 output voltage falling below 2.4V

The maximum current you can sink into the device is 24mA without the
logic state 0 output voltage rising above 0.5V

I haven't checked the spec. but it is likely that if you greatly exceed
the currents quoted you will damage the device.
--
Regards

John Cameron
Senior Design Engineer

Northern Hi-Tec Ltd
Wasco House
Willow Lane
Lancaster
LA1 5NA
United Kingdom

Telephone: +44 (0) 1524 67833
Facsimile: +44 (0) 1524 67544
Email: john.cameron@nht.co.uk
URL: www.nht.co.uk
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