AD5758 datasheet(55/72 Pages) AD

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Data Sheet

AD5758

Rev. 0 | Page 55 of 72

DAC Input Register

Address: 0x01, Reset: 0x010000, Name: DAC_INPUT

Bits[D15:D0] consists of the 16-bit data to be written to the DAC. If the LDAC pin is tied low (that is, active), the DAC_INPUT register

contents are written directly to the DAC_OUTPUT register without any LDAC functionality dependence. If the LDAC pin is tied high,

the contents of the DAC_INPUT register are written to the DAC_OUTPUT register when the LDAC pin is brought low or when the

software LDAC command is written.

Table 28. Bit Descriptions for DAC_INPUT

Bits

Bit Name

Description

Reset

Access

FAULT_PIN_STATUS

The FAULT_PIN_STATUS bit reflects the inverted current status of the FAULT pin.

0x0

[20:16]

REGISTER_ADDRESS

0x0

[15:0]

DAC_INPUT_DATA

DAC input data.

0x0

R/W

DAC Output Register

Address: 0x02, Reset: 0x020000, Name: DAC_OUTPUT

DAC_OUTPUT is a read only register and contains the latest calibrated 16-bit DAC output value. If a clear event occurs due to a WDT

fault, this register contains the clear code until the DAC is updated to another code.

Table 29. Bit Descriptions for DAC_OUTPUT

Bits

Bit Name

Description

Reset

Access

FAULT_PIN_STATUS

The FAULT_PIN_STATUS bit reflects the inverted current status of the FAULT pin.

0x0

[20:16]

REGISTER_ADDRESS

0x0

[15:0]

DAC_OUTPUT_DATA

DAC output data. For example, the last calibrated 16-bit DAC output value.

0x0

Clear Code Register

Address: 0x03, Reset: 0x030000, Name: CLEAR_CODE

When writing to the CLEAR_CODE register, Bits[D15:D0] consist of the clear code to which the DAC clears on the occurrence of a clear

event (for example, a WDT fault). After a clear event, the DAC_INPUT register must be rewritten to with the 16-bit data to be written to

the DAC, even if it is the same data as previously written before the clear event. Performing an LDAC write (either hardware or software)

does not update the DAC_OUTPUT register to a new code until the DAC_INPUT register is first written to.

Table 30. Bit Descriptions for CLEAR_CODE

Bits

Bit Name

Description

Reset

Access

FAULT_PIN_STATUS

The FAULT_PIN_STATUS bit reflects the inverted current status of the FAULT pin.

0x0

[20:16]

REGISTER_ADDRESS

0x0

[15:0]

CLEAR_CODE

Clear code. The DAC clears to this code upon a clear event, for example, a WDT fault.

0x0

R/W

AD5758 Datasheet(PDF) 55 Page - Analog Devices

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