Advantages of using the ADA4528-x compared to traditional chopper amplifiers

Document created by analog-archivist Employee on Feb 23, 2016
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What are the advantages of using the ADA4528-x compared to traditional chopper
amplifiers?

 

Traditionally, chopper amplifiers have fairly high baseband noise, limiting
their usage to dc and sub-100 Hz applications. However, the ADA4528-x employs a
novel chopping technique (with an auto correction feedback loop) and has a
chopping frequency that is five to ten times higher than the chopping
frequencies of traditional chopper amplifiers. With a chopping frequency at 200
kHz and an ultralow voltage noise density of 5.6 nV/√Hz, the ADA4528-x can be
used in wider bandwidth applications where traditional chopper amplifiers
cannot be used. In addition,  the ADA4528-x also offers 0.3 μV offset voltage,
0.002 μV/°C offset voltage drift, 158 dB common-mode rejection, and 150 dB
power supply rejection.

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