Abstract
This paper presents the first commercially available IC that integrates Giant Magnetoresistive Ratio (GMR) materials with semiconductor devices. This marriage results in a highly sensitive, inexpensive, low power, and temperature stable magnetic field sensor. The chip uses a BiCMOS 1.5 /spl mu/ process and a masterslice design approach that allows rapid prototyping of many custom configurations in a 35 mil by 95 mil size. Sensing of a wide range of magnetic fields (0-500 Gauss) is possible, with digital and linear outputs available. Temperature range of operation is -55 C to +150 C making the chip ideal for many automotive, industrial, and military applications.
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