Re: differences between shunt and series voltage references?

Just to add another option...

I also like the National LM4120 for A-D references. I am using this as
a reference for an existing A-D subsystem (not high speed, I must admit
- system voltage monitoring in this application).

I am using the LM4120AIM5-4.1 which has the following specs:

180mV dropout at 1mA (worst case, typical = 120mV)
+/-5mA sink OR source
50ppm tempco
Output noise voltage 20uV p-p 0.1Hz - 10Hz, 36uV p-p 10Hz - 10kHz
Zo < 1 ohm for F < 10kHz ( at Iout = 1mA)

Comes in a nice SOT23-5 package.

Cheers

PeteS

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