Current sense amplifiers are used to amplify small differential signals in the presence of large common-mode voltages. This article from Analog Devices can help you choose the proper amplifier for your specialized application.
Analog Devices offers a full range of current sense amplifiers, capable of operating with supply voltages as low as 1.8V and withstanding input common-mode voltages as high as 600V. Additionally, each amplifier is designed to handle a different common-mode rejection ratio (CMRR). An amplifier’s ability to adapt to varying input voltages is called its step response, and is important because it allows the amplifier to be used in applications where input voltage may be inconsistent or at risk of being affected by external variables. In rigorous testing, the AD8210 and AD8207 can adapt to input voltage ranges of -2V to +65V and -4V to +35V, respectively. This industry-leading versatility allows designers to develop much more robust and resilient products.
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