SFFS493 October   2024 OPT4001-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)

Failure Mode Distribution (FMD)

The failure mode distribution estimation for the OPT4001-Q1 in Table 3-1 comes from the combination of common failure modes listed in standards such as IEC 61508 and ISO 26262, the ratio of sub-circuit function size and complexity, and from best engineering judgment.

The failure modes listed in this section reflect random failure events and do not include failures resulting from misuse or overstress.

Table 3-1 Die Failure Modes and Distribution
Die Failure ModesFailure Mode Distribution (%)
I2C communication error10
Some output register bits stuck or false values15
ADC offset in output measurement15
Photodiode current out of specification15
Control register bank data bit error15
INT pin false trigger or fail to trigger5
Optical filter characteristics changing over time 15
Device output reading out of specification 10