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How to make a circuit with one exit using AD420 IC ?

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Inkwaterman

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Static rele

Hi !
I have the following problem:
I have an IC ( AD420 ) with 2 different exit , a current exit , usually 4-20 mA and a voltage exit, usually 0-5 V .
I want to do a circuit with only one exit , where I can select the exit type via software, but for do this I must connect the current and voltage exit to the same circuit exit. Is correct use a rele for connect the 2 IC exit to the circuit exit ?
If my solution is no good, could you suggest me another one?
Thanx.
 

Borber

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Re: Static rele

Look at datasheet. Only one output can be selected at the time. Selection is done over enable pins of chip. But current output can be used as voltage output if you connect propper resistor from current output to ground.
 

Inkwaterman

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Re: Static rele

Borber said:
Look at datasheet. Only one output can be selected at the time. Selection is done over enable pins of chip. But current output can be used as voltage output if you connect propper resistor from current output to ground.

It's true, but with this solution I can't set the exit type via software.
In fact if I understand what you say, I must put the resistance on the current exit, if I want a voltage exit, instead if I want a current exit the resistance is not necessary.
 

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