cheap voltage reference over temperature
cheap voltage reference over temperature
(OP)
Hi,
I want to build a cheap voltage reference for a circuit. I normally use a ZR431LF1 (Zetex voltage regulator), but I find it quite expensive.
I though about using a Zener diode with a voltage follower, but it might not be reliable over temperature (-40 to +90°C).
How can I build a voltage reference with a good performance over this temperature range?
Thanks!
yarayara
I want to build a cheap voltage reference for a circuit. I normally use a ZR431LF1 (Zetex voltage regulator), but I find it quite expensive.
I though about using a Zener diode with a voltage follower, but it might not be reliable over temperature (-40 to +90°C).
How can I build a voltage reference with a good performance over this temperature range?
Thanks!
yarayara





RE: cheap voltage reference over temperature
Wheels within wheels / In a spiral array
A pattern so grand / And complex
Time after time / We lose sight of the way
Our causes can't see / Their effects.
RE: cheap voltage reference over temperature
http://
You might find it useful.
RE: cheap voltage reference over temperature
RE: cheap voltage reference over temperature
The link looks good!
10 cents is cheaper than the 33cents I pay for the Zetez, but the operating temperature of the TL431 is from -25 to +80°C. My applications requirement is from -40°C to +90°C :/
But thanks anyway.
RE: cheap voltage reference over temperature
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
RE: cheap voltage reference over temperature
http
TTFN
RE: cheap voltage reference over temperature
saving saving saving.
its cheaper to buy the chip. I build a better circuit, but its more expensive =/
I guess a Zener diode is fair enough for a non critical application.
Thanks everybody.
RE: cheap voltage reference over temperature
How many volts is your reference voltage?