AD5413 datasheet(33/49 Pages) AD

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Data Sheet

AD5413

Rev. 0 | Page 33 of 49

Similar to all other status bits in the ANALOG_DIAG_RESULTS

bits are sticky, and a 1 must be written to the bits to clear the

bits. If the error condition is still present, the flag remains high

even after a 1 is written to clear the flag.

Table 14. Comparator Supply Activation Thresholds

Supply

Lower

Threshold (V)

Nominal

Value/Range (V)

Upper

Threshold (V)

INT_AVCC

3.8

4 to 5

5.2

VLDO

2.8

3 to 3.6

3.8

REFIN

2.24

2.5

2.83

REFOUT

2.24

2.5

2.83

OUTPUT FAULT

The AD5413 has a FAULT pin that is an active low, pseudo open-

drain output that connects several AD5413 devices together to

one pull-up resistor for global fault detection. This pin is high

impedance when no faults are detected and is asserted low when

certain faults, such as an open circuit in current mode, a short

circuit in voltage mode, a CRC error, or an overtemperature

error, are detected. Table 15 shows the fault conditions that

automatically force the FAULT pin active and shows the user

maskable fault bits available via the FAULT_PIN_CONFIG

FAULT pin status bit, FAULT_PIN_STATUS, that mirrors the

inverted current state of the FAULT pin.

The DIG_DIAG_STATUS bit and ANA_DIAG_STATUS bit of

the status register are used in conjunction with the FAULT pin and

the FAULT_PIN_STATUS bit to inform the user which fault

condition is causing either the FAULT pin or a FAULT_PIN_

STATUS bit to activate.

Table 15. FAULT Pin Trigger Sources.

Fault Type

Mapped to

FAULT Pin

Mask

Ability

Digital Diagnostic Faults

Oscillator Stop Detect

Yes

Calibration Memory Not Refreshed

N/A1

Reset Detected

N/A1

DAC Latch Monitor Error

Yes

Inverse DAC Check Error

Yes

Calibration Memory CRC Error

Yes

Invalid SPI Access

Yes

SCLK Count Error2

Yes

Slip Bit Error

Yes

SPI CRC Error

Yes

Analog Diagnostic Faults

Current Output Open-Circuit Error

Yes

Voltage Output Short-Circuit Error

Yes

Die Temperature Error

Yes

REFOUT Comparator Error

Yes

REFIN Comparator Error

Yes

INT_AVCC Comparator Error

Yes

VLDO Comparator Error

Yes

1 Not applicable.

2 The SCLK count error cannot be masked in the FAULT_PIN_CONFIG register.

However, the error can be excluded from the FAULT pin by enabling the

SPI_DIAG_QUIET_EN bit (Bit 3) in the GP_CONFIG1 register.

AD5413 Datasheet(PDF) 33 Page - Analog Devices

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