SFFS866 May   2024 ALM2402-Q1

 

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

4.1 HTSSOP Package

Figure 4-1 shows the ALM2402-Q1 pin diagram for the HTSSOP package. For a detailed description of the device pins, see the Pin Configuration and Functions section in the ALM2402-Q1 data sheet.

Figure 4-1 Pin Diagram (HTSSOP) Package
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
IN1‒ 1 Negative feedback not present to device. Depending on circuit configuration, output will most likely move to negative supply. B
IN+ 2 Device common-mode tied to negative rail. Depending on circuit configuration, output will likely not respond due to the device being put in an invalid common-mode condition. C
OTF 3 GND pin will be likely be driven to OTF voltage. the device will turn off. No damage to device. B
INA2+ 4 Device common-mode tied to negative rail. Depending on circuit configuration, output will likely not respond due to the device being put in an invalid common-mode condition. C
IN2‒ 5 Negative feedback not present to device. Depending on circuit configuration, output will most likely move to negative supply. B
NC 7 NC pin internally disconnected; no effect. D
NC 8 NC pin internally disconnected; no effect. D
OUT2 9 Depending on circuit configuration, the device will likely be forced into short circuit condition with OUT2 voltage ultimately forced to GND voltage. Prolonged exposure to short circuit conditions can result in long term reliability issues. A
VCC 10 Op amp supplies will be shorted together leaving VCC pin at some voltage between VCC and GND sources (depending on source impedance). A
VCC 11 Op amp supplies will be shorted together leaving VCC pin at some voltage between VCC and GND sources (depending on source impedance). A
VCC 12 Op amp supplies will be shorted together, which leaves the VCC pin at some voltage between VCC and GND sources (depending on source impedance). A
OUT1 13 Depending on circuit configuration, device will likely be forced into short circuit condition with OUT1 voltage ultimately forced to GND voltage. Prolonged exposure to short circuit conditions can result in long term reliability issues. A
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
IN1‒1Inverting pin of op amp left floating. Negative feedback will not be provided to device, likely resulting in device output moving between positive and negative rail. IN1‒ pin voltage will likely end up at positive or negative rail due to leakage on ESD diodes.B
IN+2Input common-mode left floating. Op amp will not be provided with common-mode bias, device output will likely end up at positive or negative rail. IN1+ pin voltage will likely end up at positive or negative rail due to leakage on ESD diodes.B
OTF3No damage to device, but OTF pin will be vulnerable to capacitive coupling and potential switching between shutdown and non-shutdown states.B
IN2+4Input common-mode left floating. Op amp will not be provided with common-mode bias, device output will likely end up at positive or negative rail. IN2+ pin voltage will likely end up at positive or negative rail due to leakage on ESD diodes.B
IN2‒5Inverting pin of op amp left floating. Negative feedback will not be provided to device, likely resulting in device output moving between positive and negative rail. IN2‒ pin voltage will likely end up at positive or negative rail due to leakage on ESD diodes.B
GND6Negative supply left floating. Op amp will cease to function as no current can source/sink to the device.B
NC7NC pin internally disconnected; no effect.D
NC8NC pin internally disconnected; no effect.D
OUT29No negative feedback or ability for OUT2 to drive application.B
VCC10Positive supply left floating. Op amp will cease to function as no current can source/sink to the device.A
VCC11Positive supply left floating. Op amp will cease to function as no current can source/sink to the device.A
VCC12Positive supply left floating. Op amp will cease to function as no current can source/sink to the device.A
OUT113No negative feedback or ability for OUT1 to drive application.B
GND14Negative supply left floating. Op amp will cease to function as no current can source/sink to the device.A
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin NamePin No.Shorted toDescription of Potential Failure Effect(s)Failure Effect Class
IN1‒12Both inputs will be tied together. Depending on the offset of the device, this will likely move the output voltage near mid supply.D
IN1+23Device will toggle between shutdown or non-shutdown depending on OTF voltage. This is a 3.3V logic gate, so exceeding the ABS max ratings for current or voltage can damage the device.A
OTF34Device will toggle between shutdown or non-shutdown depending on OTF voltage. This is a 3.3V logic gate, so exceeding the ABS max ratings for current or voltage can damage the device.A
IN2+45Both inputs will be tied together. Depending on the offset of the device, this will likely move the output voltage near mid supply.D
IN2‒56Negative feedback not present to device. Depending on circuit configuration, output will most likely move to negative supply.B
GND67NC pin internally disconnected; no effect.D
NC89NC pin internally disconnected; no effect.D
OUT2910Depending on circuit configuration, device will likely be forced into short circuit condition with OUT2 voltage ultimately forced to VCC voltage. Prolonged exposure to short circuit conditions can result in long term reliability issues.A
VCC1213Depending on circuit configuration, device will likely be forced into short circuit condition with VCC voltage ultimately forced to OUT1 voltage. Prolonged exposure to short circuit conditions can result in long term reliability issues.A
OUT11314Depending on circuit configuration, device will likely be forced into short circuit condition with OUT1 voltage ultimately forced to GND voltage. Prolonged exposure to short circuit conditions can result in long term reliability issues.A
GND141Negative feedback not present to device. Depending on circuit configuration, output will most likely move to negative supply.B
Table 4-5 Pin FMA for Device Pins Short-Circuited to supply
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
IN1‒1Negative feedback not present to device. Depending on non-inverting input voltage and circuit configuration, output will most likely move to negative supply.B
IN1+2Depending on circuit configuration, application will likely not function due to the device common-mode being connected to IN1+.B
OTF3Device will be likely be enabled. This is a 3.3V logic gate, so exceeding the absolute maximum ratings for current or voltage can damage the device.A
IN2+4Depending on circuit configuration, application will likely not function due to the device common-mode being connected to IN2+.B
IN2‒5Negative feedback not present to device. Depending on non‒inverting input voltage and circuit configuration, output will most likely move to negative supply.B
GND6Op amp supplies will be shorted together leaving GND pin at some voltage between GND and VCC sources (depending on source impedance).A
NC7NC pin internally disconnected; no effect.D
NC8NC pin internally disconnected; no effect.D
OUT29Depending on circuit configuration, device will likely be forced into short circuit condition with OUT2 voltage ultimately forced to VCC voltage. Prolonged exposure to short circuit conditions can result in long term reliability issues.A
OUT113Depending on circuit configuration, device will likely be forced into short circuit condition with OUT1 voltage ultimately forced to VCC voltage. Prolonged exposure to short circuit conditions can result in long term reliability issues.A
GND14Op amp supplies will be shorted together leaving GND pin at some voltage between GND and VCC sources (depending on source impedance).A