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Electronics => Projects, Designs, and Technical Stuff => Topic started by: Red_Micro on January 05, 2021, 10:17:08 pm

Title: How to check stability/integrity of voltage reference IC?
Post by: Red_Micro on January 05, 2021, 10:17:08 pm

I'm using TL431 shunt regulator as the voltage reference of 2.5V for an ADC. If I don't add a cap at the output, this introduces non-linearities in the ADC measurements. When I add a 10uF cap, the reference becomes more stable reducing accuracy errors in ADC. My question is how I can measure or see this behavior with let's say an scope? How can I see this instability of the regulator to understand how it changes when sampling?

Title: Re: How to check stability/integrity of voltage reference IC?
Post by: bob91343 on January 05, 2021, 10:40:31 pm

You could build two of them and use a differential probe.