Configurable 24-bit Analog-to-Digital Interface IC for High Performance Capacitive MEMS Gyroscope
The SWS1120 is a full capacitive detection MEMS gyroscope control IC. The SWS1120 provides a highly configurable plug and play interface solution for MEMS gyroscopes for high performance applications. The SWS1120 offers a high resolution digital output and is supported by proprietary development software and hardware that enables MEMS developers/producers to quickly demonstrate/assess the performance of a MEMS gyroscope. The SWS1120 is designed as an Application Specific Standard Product (ASSP) that is ready for integration with MEMS sensing elements. The SWS1120 is designed to support a wide variety of MEMS gyroscope designs through OTP configuration only. Capacitive MEMS gyroscopes with various resonance frequencies and sensitivities are supported. Depending on the exact MEMS design and electrical characteristics, differential capacitance resolution down to 50 zF/vHz or less is achievable. The SWS1120’s capacitive front-end has a trimmable gain and offset to accommodate MEMS process variation during fabrication. SWS1120 requires only a single 5V supply and few passive components.