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From: Phil Hobbs
Subject: Re: LED reverse leakage current
Date: Wed, 20 Nov 2002 16:16:37 -0500
Organization: IBM T. J. Watson Research Center
NNTP-Posting-Date: 20 Nov 2002 21:16:39 GMT
X-Mailer: Mozilla 4.61 [en] (OS/2; U)
Tony Williams wrote:
> I've measured <1uA (or <<1uA) on a variety of types,
> at up to 15V reverse bias.
I needed some really amazing switches for a multiplexer for a $10
pyroelectric camera. I measured some ordinary Chicago Miniature Lamp
red surface mount LEDS as leaking less than 100 femtoamps from -5V to
+0.5V of bias. Together with a little illumination to provide a
controllable 1 to 5 picoamp bias current, they worked very well. A
description is at
http://users.bestweb.net/~hobbs/footprints/fpspie11.pdf, and some data
from the sensor and more discussion at http://www.pergamos.net).
High bandgap devices really don't leak.
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