Author Topic: Are cheap AD584 units worth it?  (Read 63156 times)

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Offline dorkshoei

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Re: Are cheap AD584 units worth it?
« Reply #100 on: December 26, 2020, 11:49:07 pm »
So here are my measurements, however not as official as guy48065 has done with one hour warmin etc. just power up two Keithley 2000 not calibrated for at least 8 years but that's all I have here  :)
The K-unit figures are pretty spot on, the L-unit figures are fiction.

I'm seeing a few units advertised with an ad584-m.   Does anyone know about this variant?

"Built-in AD584-M, highest accuracy and stability."

https://www.ebay.com/itm/KKMOON-Accuracy-Voltage-Reference-Module-4-Channel-2-5V-7-5V-5V-10-Hot-Q3D9-/254629183828?_trksid=p2349624.m46890.l49292

« Last Edit: December 26, 2020, 11:54:39 pm by dorkshoei »
 

Online magic

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Re: Are cheap AD584 units worth it?
« Reply #101 on: December 27, 2020, 01:22:00 pm »
Rev. A datasheet lists -55-125°C temperature grades as S and T, with specs similar to J and K, respectively.

M grade is probably fake. The photographs you linked show the K grade, by the way.
 

Offline jharris1993

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Re: Are cheap AD584 units worth it?
« Reply #102 on: May 24, 2024, 01:09:41 pm »
Quote
NOISE FILTERING
The bandwidth of the output amplifier in the AD584 can be
reduced to filter output noise. A capacitor ranging between 0.01 µF
and 0.1 µF connected between the CAP and VBG terminals further
reduces the wideband and feedthrough noise in the output of
the AD584, as shown in Figure 9 and Figure 10. However, this
tends to increase the turn-on settling time of the device; therefore,
allow for ample warm-up time.

This is the relevant section of the Analog Devices datasheet.
 


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