Epson starts shipment of gyro sensors for car navigation19 Nov 2013
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Seiko Epson has started shipment of its XV4001 series of gyro sensors for car navigation. The sensors, which come with either an SPI or I2C digital output interface, can identify current position by sensing changes in vehicle travel direction and are also used for dead reckoning in areas without GPS signals, such as in tunnels.
Users of analogue-output quartz gyro sensors have to convert those analogue 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 complications that place extra engineering load on users. Users interested in lightening this load have been driving higher demand for gyroscopes with digital output interfaces.
Epson's XV4001 series of gyro sensors, which can be ordered with either a popular 3-wire and 4-wire SPI digital interface or an I2C digital interface, combine QMEMS crystals with optimised Epson ICs. They also provide temperature compensation for stability and accuracy over temperature changes. Epson increased reliability by providing the gyroscopes with a self-test function that senses irregularities.
The XV4001 series consists of four models, with different interface and package tilt angle combinations for different integrations. The XV4001BD (SPI interface) and XV4001BC (I2C interface) have a package inclined angle of 0 degrees. The XV4001KD (SPI interface) and XV4001KC (I2C interface) have a package inclined angle of 20 degrees.
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