From aerospace and defense to gas exploration and pharmaceuticals, there is an increasing demand across many industries for ultra-high precision measurements that can achieve greater than 24-bit resolution. To meet this demand for exceptionally low noise, voltage reference noise must be considered.
To achieve a high measurement resolution of 25 bits or beyond, even the best standalone voltage reference with a low noise specification needs help attenuating its noise. This includes adding external circuitry, such as a filter, to find the desired ADC dynamic range.
Learn more about the various types of low-pass filters and how they can be applied to attenuate voltage reference noise in this article by Analog Devices’ Applications Engineer, Anshul Shah. Explore filter design techniques and filter trade-offs with simple passive RC low-pass filters (LPFs) and active-based signal flow graph (SFG) low-pass filters, as well as the system evaluation results using a sigma-delta (∑-Δ) ADC.
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