SFFS306 December 2021 AMC1351-Q1
This section provides a failure mode analysis (FMA) for the pins of the AMC1351-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:
Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.
Class | Failure Effects |
---|---|
A | Potential device damage that affects functionality. |
B | No device damage, but loss of functionality. |
C | No device damage, but performance degradation. |
D | No device damage, no impact to functionality or performance. |
Figure 4-1 shows the AMC1351-Q1 pin diagram. For a detailed description of the device pins, see the Pin Configuration and Functions section in the AMC1351-Q1 data sheet.
Following are the assumptions of use and the device configuration assumed for the pin FMA in this section:
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
VDD1 | 1 | Device primary side unpowered. Fail-safe output (see data sheet for more details). Observe that the absolute maximum ratings for the IN pin of the device is met, otherwise device damage may be plausible. | A |
IN | 2 | IN stuck low (GND1). Differential output (VOUTP – VOUTN) = 0 V with common-mode voltage approximately 1.44 V. | B |
GND1 | 3 | No effect. Normal operation. | D |
GND1 | 4 | No effect. Normal operation. | D |
GND2 | 5 | No effect. Normal operation. | D |
OUTN | 6 | OUTN stuck low (GND2). Excess current consumption from VDD2 source because of short-circuit condition. Device damage plausible if condition is present for extended period of time. | A |
OUTP | 7 | OUTP stuck low (GND2). Excess current consumption from VDD2 source because of short-circuit condition. Device damage plausible if condition is present for extended period of time. | A |
VDD2 | 8 | Device secondary side unpowered. OUTP and OUTN pins are driven to GND2. | B |
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
VDD1 | 1 | Device primary side unpowered. Fail-safe output (see data sheet for more details). | B |
INP | 2 | Differential output (VOUTP – VOUTN) undetermined. | B |
GND1 | 3 | Device input buffer is missing ground reference. Differential output (VOUTP – VOUTN) undetermined. | B |
GND1 | 4 | Device high side unpowered. Fail-safe output (see data sheet for more details). | B |
GND2 | 5 | Device behavior undetermined. VOUTN and VOUTP undetermined. | B |
OUTN | 6 | Differential output (VOUTP – VOUTN) undetermined. | B |
OUTP | 7 | Differential output (VOUTP – VOUTN) undetermined. | B |
VDD2 | 8 | Device secondary side unpowered. OUTP and OUTN pins are driven to GND2. | B |
Pin Name | Pin No. | Shorted to | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|---|
VDD1 | 1 | IN | IN stuck high (VDD1). Differential output (VOUTP – VOUTN) = VVDD1 x 0.4. | B |
IN | 2 | GND1 | IN stuck low. Differential output (VOUTP – VOUTN) = 0 V. | B |
GND1 | 3 | GND1 | No effect. Normal operation. | D |
GND1 | 4 | GND2 | Not considered. Corner pin. | D |
GND2 | 5 | OUTN | OUTN stuck low (GND2). Excess current consumption from VDD2 source because of short-circuit condition. Device damage plausible if condition is present for extended period of time. | A |
OUTN | 6 | OUTP | Differential output (VOUTP – VOUTN) = 0 V with common-mode voltage approximately 1.44 V. Excess current consumption from VDD2 source. Device damage plausible if condition is present for extended period of time. | A |
OUTP | 7 | VDD2 | OUTP stuck high (VDD2). Excess current consumption from VDD2 source. Device damage plausible if condition is present for extended period of time. | A |
VDD2 | 8 | VDD1 | Not considered. Corner pin. | D |
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
VDD1 | 1 | No effect. Normal operation. | D |
IN | 2 | IN stuck high (VDD1). Differential output (VOUTP – VOUTN) = VVDD1 x 0.4. | B |
GND1 | 3 | Incorrect ground reference for input buffer. Differential output (VOUTP – VOUTN) incorrect. | B |
GND1 | 4 | Device primary side unpowered. Fail-safe output (see data sheet for details). Observe that the absolute maximum ratings for IN is met, otherwise device damage may be plausible. | A |
GND2 | 5 | Device secondary side unpowered. OUTP and OUTN pins are driven to GND2. | B |
OUTN | 6 | OUTN stuck high (VDD2). Excess current consumption from VDD2 source. Device damage plausible if condition is present for extended period of time. | A |
OUTP | 7 | OUTP stuck high (VDD2). Excess current consumption from VDD2 source. Device damage plausible if condition is present for extended period of time. | A |
VDD2 | 8 | No effect. Normal operation. | D |