SFFS433 March   2022 TMP127-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 SOT-23 Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 SOT-23 Package

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for the TMP127-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 Modes Failure Mode Distribution (%)
Serial Communication Error 15%
ADC offset out of specification 20%
ADC gain out of specification 25%
ADC conversion output code bit error 15%
ADC incorrect input channel selected 5%
Register bank data bit error 15%
Alert false trip, fails to trip 5%