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Clarification on ADXRS624 specs

Thread Summary

The user is replacing a Murata ENV-05DB angular velocity sensor with an ADXRS624. The ADXRS624 has a typical null voltage of 2.5V at 0 degrees when supplied with 5V, and its angular rate range is +/-75deg/s. No modifications are needed for the null voltage, but the user should verify if the ADXRS624's range can be adjusted to match the ENV-05DB's 80 degrees.
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Category: Hardware
Product Number: ADXRS624

I'm trying to replace a MuRata  angular velocity sensor, P/N: ENV-05DB. It is a simple 3  pin chip, single axis, analog device
with supply voltage of 5 volts. Its null voltage at 0 degrees in 2.5 volts.

In the specs for the ADXRS624, it says the output is ratiometric with respect to a provided
reference supply. I think that means I can change the null voltage and the ratio of that voltage
with respect to the angle. Further on in the specs, it says that the null voltage is 2.5 volts.

Does that mean that without modification, my null voltage is 2.5 volts at 0 degrees? If not, what
modifications do I need to do to get a null voltage of 2.5 volts based on a supply voltage
of 5 volts?

Also, I dont see a spec for Maximum Angular. On the ENV-05DB, it is 80 degrees.
Is there a way to modify the ADXRS624 to have the same Maximum angular of 80 degrees
and keep the output voltage in correct proportion ?

Thank You,

Eric

  • Hi Eric, 

    sorry for the late reply. With respect to the angular rate range, the datasheet specifies in table 1 that the typical range is +/-75deg/s (highlighted in blue).

    Regarding the null voltage, you can see in the same table that Vs = AVcc = Vdd = Vratio = 5V (highlighted in green), for this condition, the typical null voltage is 2.5V (highlighted in yellow).

    Both the range and the null are ratiometric with respect to the voltage supply. 

    I hope this helps, 

    Pablo.