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DRV5053: DRV5053 equivalent magnetic noise power spectrum

olivier haas
Prodigy 10 points
Part Number: DRV5053
Other Parts Discussed in Thread: DRV5055, DRV5056

Hy everyone,

In the datasheet of th DRV5053VA Hall Effect sensor, the noise level is 490 µTmpp. Is this noise level considered as white noise?

If yes, the equivalent noise level should 3.46 µT/sqrt(Hz).

I think this is a lot.

Can evryone help me please.

Kind regards,

Olivier HAAS

  • 0
    TI__Mastermind 26205 points

    Hello Olivier,

    Thank you for using the TI forum.  I am not sure if it is considered white noise or not, but if it is looked at as white noise then the RMS noise density would be:

    InputReferredNoise / √(bandwith) / 6.6

    From your calculation it looks like you forgot to divide by 6.6, so the RMS noise would actually be 525 nT/√(Hz).

    If this noise is still too much for you, then you could look our newer linear Hall sensors, the DRV5055 (bidirectional), DRV5056 (unidirectional). With a 5V supply, both of these devices have 0.12 mTpp input-referred noise, with a Input-referred RMS noise density spec of 130 nT/√(Hz).