SFFS578A February   2023  – January 2024 INA241A-Q1 , INA241B-Q1 , INA296A-Q1 , INA296B-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 DDF-8, DGK-8, DGS-10 and D-8 Packages
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 DDF-8, DGK-8 and D-8 Packages
    2. 4.2 DGS-10 Package
  7. 5Revision History

4.1 DDF-8, DGK-8 and D-8 Packages

Figure 4-1 shows the INA241x-Q1 and INA296x-Q1 pin diagrams for the DDF-8, DGK-8 and D-8 packages. For a detailed description of the device pins, see the Pin Configuration and Functions section in the INA241x-Q1 and INA296x-Q1 data sheets.

Figure 4-1 Pin Diagram (DDF-8, DGK-8 and D-8) Packages
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN- 1 In high-side configuration, a short from the bus supply to GND will occur. High current will flow from bus supply to ground. In low side configuration, normal operation. B for high side or D for low side
GND 2 Normal operation. D
REF2 3 If intended connection is anything other than GND, functionality will be affected. D if REF2 = GND by design; B otherwise
NC 4 Normal operation. D
OUT 5 Output shorts to ground. B
Vs 6 Power supply shorted to ground. B
REF1 7 If intended connection is anything other than GND, functionality will be affected. D if REF1 = GND by design; B otherwise
IN+ 8 In high-side configuration, a short from the bus supply to GND will occur. High current will flow from bus supply to ground. In low side configuration, input pins are shorted. B
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN- 1 IN- will be at the same potential as IN+. Differential input voltage is effectively 0V. B
GND 2 GND is floating. Output will be incorrect as it is no longer referenced to GND. B
REF2 3 Device loses reference voltage. B
NC 4 This pin has internal weak pull down. Even though possible, the likelihood of malfunction is low. D
OUT 5 Output can be left open. There is no effect on the IC. C
Vs 6 No power supply to device. Device may be biased through inputs. Output will be close to GND. B
REF1 7 Device loses reference voltage. B
IN+ 8 IN+ will be at the same potential as IN-. Differential input voltage is effectively 0V. B
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin Name Pin No. Shorted to Description of Potential Failure Effects Failure Effect Class
IN- 1 GND In high-side configuration, a short from the bus supply to GND will occur. High current will flow from bus supply to ground. In low side configuration, normal operation. B for high side or D for low side
GND 2 REF2 If intended connection is anything other than GND, functionality will be affected. D if REF2 = GND by design; B otherwise
REF2 3 NC Functionality will be affected if REF2 equals to anything but GND by design. C
NC 4 OUT Changing output may affect functionality, but the likelihood is very low. C
OUT 5 Vs Output shorts to supply. B
Vs 6 REF1 Functionality will be affected if REF1 equals to anything but Vs by design. D if REF1 = Vs by design; B otherwise
REF1 7 IN+ If high voltage (greater than 5.5V) is present, damage will occur. A
IN+ 8 IN- Input differential voltage = 0V B
Table 4-5 Pin FMA for Device Pins Short-Circuited to Supply
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN- 1 In high-side configuration, a short from the bus supply to Vs will occur. High current will flow from bus supply to Vs or vice versa. Device could be damaged. A for high side or B for low side
GND 2 Power supply shorted to GND. B
REF2 3 If intended connection is anything other than Vs, functionality will be affected. D if REF2 = Vs by design; B otherwise
NC 4 Additional small amount of current is drawn by the pull down resistor. C
OUT 5 Output shorts to supply. B
Vs 6 Normal operation. D
REF1 7 If intended connection is anything other than Vs, functionality will be affected. D if REF1 = Vs by design; B otherwise
IN+ 8 In high-side configuration, a short from the bus supply to Vs will occur. High current will flow from bus supply to Vs or vice versa. Device could be damaged. A for high side or B for low side