SFFSA16 October   2024 INA745A , INA745B

 

  1.   1
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 3x5 QFN Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 3x5 QFN Package

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for INA74X-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 (%)
ADC output bit error20
ADC gain out of specification20
ADC offset out of specification20
Communication error15
Register bit error10
ADC mux select error5
ALERT - false trip or failure to trip5
Pin to pin short, any two pins5