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DRV5023 - Number of operation cycles before failure?

Faizan Masood
Prodigy 20 points
Other Parts Discussed in Thread: DRV5023, DRV5023-Q1

What is the typical number of operation cycles before failure for this digital switch hall effect sensor?

I was advised by TI tech support to post this questions here. We need this information to prove safety aspect of our system.

  • 0
    TI__Guru** 114905 points
    Hi Faizan,

    Our expert has been notified and should reply soon.
  • 0
    TI__Mastermind 20985 points

    Hi Faizan,

    Being a solid-state sensor, it should virtually never wear out.  There is a calculated MTBF and FIT published here.  The DRV5023 is actually the same device as the automotive version, DRV5023-Q1 (it's just tested differently), and the Q1 was qualified according to the AEC-Q100 Grade 0 standard.  It involves 2000 temperature cycles of -55C to 150C, and 2000 hours of stress to simulate >10 year wear at the highest operating voltage (38V) and temperature (150C).

    In safety systems, a common technique is to use multiple sensors for redundancy.  This can be done with 2 identical sensors, or using 2 that have inverse outputs.  For this, we made the DRV5023-Q1 "FA" and "FI" versions, where the "FI" has an inverted voltage output.  When a magnetic South pole comes close to the package, the FA output becomes Low and the FI output becomes High-Z (should be externally pulled up to High).

    Best regards,
    RE

  • 0 in reply to RE
    Prodigy 20 points
    Thank you for the fast response. We may have too look into incorporating 2 sensors for redundacy just as you described.
    Thanks for the heads up.