Forward voltage maximum of bandgap diode?
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Forward voltage maximum of bandgap diode?

 
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Nick
Guest
Posted: Tue Sep 13, 2005 3:14 pm    Post subject: Forward voltage maximum of bandgap diode? Reply with quote
Can anyone tell me the forward voltage (maximum) that a bandgap micropower
shunt voltage reference can sustain eg an LM4040 - 4.096v ?
The data sheets make no reference to this parameter.
Thanks
Nick

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Spehro Pefhany
Guest
Posted: Tue Sep 13, 2005 3:20 pm    Post subject: Re: Forward voltage maximum of bandgap diode? Reply with quote
On Tue, 13 Sep 2005 10:14:25 -0000, the renowned "Nick"
<nmr@iwoot.com> wrote:

Quote:
Can anyone tell me the forward voltage (maximum) that a bandgap micropower
shunt voltage reference can sustain eg an LM4040 - 4.096v ?
The data sheets make no reference to this parameter.
Thanks
Nick

It's not specified. I would expect it to look like a silicon diode.
The absolute maximum 'forward' current is 10mA.

Note the parasitic die attach Schottky diode (also unspecified) which
is connected to the "NC" pin. Connecting this to the 'cathode' might
alter the 'forward' characteristics (as opposed to leaving it
floating).


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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Nick
Guest
Posted: Wed Sep 14, 2005 4:35 pm    Post subject: Re: Forward voltage maximum of bandgap diode? Reply with quote
Quote:
It's not specified. I would expect it to look like a silicon diode.
The absolute maximum 'forward' current is 10mA.

Note the parasitic die attach Schottky diode (also unspecified) which
is connected to the "NC" pin. Connecting this to the 'cathode' might
alter the 'forward' characteristics (as opposed to leaving it
floating).

Thanks for your reply Spehro.
Nick

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