Seiko Epson Corporation today began shipping samples of products in its new XV4001 series of high-precision gyroscopic sensors. These sensors, designed for car navigation systems, are available with either an SPI or I2] digital output interface.

Gyroscopic sensors are generally used in car navigation systems for pinpointing current position by sensing changes in vehicle travel direction and for dead reckoning in locations where GPS signals are lost, such as in tunnels. Users of analog-output quartz gyroscopic sensors have to convert those analog signals into digital signals, generally by using an external A/D converter. However, converting the output format involves signal line routing, peripheral circuitry, and other troublesome complications that place an extra engineering load on users. Users interested in lightening this load have been driving higher demand for gyroscopes with digital output interfaces.

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