Author Topic: Ultra Low Noise Reference 2DW232, 2DW233, 2DW23x  (Read 131227 times)

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Offline 42Khz

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  • Country: nl
Re: Ultra Low Noise Reference 2DW232, 2DW233, 2DW23x
« Reply #625 on: June 02, 2019, 12:42:18 am »
Recently i bought 10 pcs 2DW232 from aliexpress.
Can anyone suggest me a simple method to test if them are originals or fake?
I have only 2 Multimeter (UT61E + AN850B), 1 Power Suply KA3005D and a Rigol DS2072A.

The easiest way is to crack one open.
If it's a single die inside covered in some gunk it's probably real (I'm not aware of any fakes like that) and if it's two discrete zeners it's a fake.
 

Offline Kleinstein

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  • Country: de
Re: Ultra Low Noise Reference 2DW232, 2DW233, 2DW23x
« Reply #626 on: June 02, 2019, 01:59:02 am »
Looking inside is probably the easiest way.
A non destructive way would be to build a simple reference circuit and measure the noise. Chances are high the fake ones would be much higher noise. I would not mind "fakes" that are very low noise.
 


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