Camera isolation switch for portable devices

Fairchild Semiconductor has launched the FSA1211, a 12-port, single-pole, single-throw analogue switch that isolates the high-speed bus from parasitic components to maintain signal integrity.

Smartphones feature dual cameras and as these cameras move to higher resolutions, parasitic components play a critical role in deteriorating signals and generating unwanted electromagnetic interference.

With a bandwidth in excess of 720MHz and high ESD (5.5 kV), the FSA1211 offers a way to isolate capacitance and maintain signal integrity for high-speed data paths.

In addition, when isolating the unused parallel interface, the FSA1211 reduces the radiated EMI of the path, improving RF desense.

The traditional parallel solution can deteriorate the signal due to the unwanted 'stub', resulting in image degradation of the camera module.

Another approach is to use three analogue switches, which complicates design and adds to the overall bill-of-material (BoM) costs.

In contrast, the FSA1211 offers robust isolation and ease of design at a lower cost.

It complements Fairchild's offering of switch products used in portable and consumer applications.

These analogue, audio, video and USB switches are instrumental in minimising redundant circuitry, eliminating connectors, simplifying design and conserving space in designs.

Back to top