SBAA484A November   2020  – December 2022 ADS1115-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 VSSOP Package
    2. 2.2 UQFN Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 VSSOP Package
    2. 4.2 UQFN Package
  6. 5Revision History

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for ADS1115-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 due to misuse or overstress.

Table 3-1 Die Failure Modes and Distribution
Die Failure ModesFailure Mode Distribution (%)
Incorrect channel selected20%
Channel-channel short 10%
ADC output code bit error15%
ADC gain out of specification15%
ADC offset out of specification15%
Communication error20%
ALERT/RDY pin false trip or fails to trip 5%