Even if it can measure 50,000 degrees/s, that means that 1 degree/s results in a difference of 50uV, since it is a 5V chip (voltage bias would be at 2.5V, thus 2.5/50000=.00005). So you better be measuring something with an extreme rotational rate and not care about the little changes.
I wonder if they are intending it as a wheel encoder for cars/trucks. You could mount it inside the hubcap along with the tire pressure sensor and relay the data back via zigbee or something.
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