The Si850x/1x products are unidirectional ac current sensors available in 10 and 20 A versions and provide a large output signal level of 2.0 V at fullscale output range. These products offer size and performance advantages over current transformers, Hall effect devices, DCR circuits and other approaches. The Si850x/1x are extremely low loss, adding less than 1.3 mΩ of series resistance and less than 2 nH of series inductance in the sensing path at 25 ºC. Current-sensing terminals are isolated from the other package pins to a maximum voltage of 1KVDC.
The Si8540 is a uni-directional, high-side current sense amplifier for use in applications that require current monitoring and control. This cost-effective, high-side current sense amplifier operates with common mode voltages to 36 V (max). It operates over a frequency range of DC-20 KHz, and can be configured to measure full-scale currents from 100 mA to 10 A.