Need to design precision 5mA constant current source (wide temp range).. need help

From: stevo (stephendeese_at_hotmail.com)
Date: 11/22/04 

Date: 22 Nov 2004 14:41:04 -0800

Hi,

I need to design a 5mA constant current source for a Wheatstone bridge
application. The problem is the source needs to be +- 3% accurate and
hold that accuracy over a -40 C to +85 C temperature range.

I have thought about using a simple FET CCS, but don't have much
experience and am not sure if I can make it accurate enough.

Can any of you more experienced guys point me in the right direction?

Thank You
Stephen

Ohter info : V avalible +15V; bridge resistance ~ 850 ohms

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