AD5758 datasheet(56/72 Pages) AD

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AD5758

Data Sheet

Rev. 0 | Page 56 of 72

User Gain Register

Address: 0x04, Reset: 0x04FFFF, Name: USER_GAIN

The 16-bit USER_GAIN register allows the user to adjust the gain of the DAC channel in steps of 1 LSB. The USER_GAIN register coding

is straight binary. The default code is 0xFFFF. In theory, the gain can be tuned across the full range of the output. In practice, the

maximum recommended gain trim is approximately 50% of the programmed range to maintain accuracy.

Table 31. Bit Descriptions for USER_GAIN

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]

USER_GAIN

User gain correction code.

0xFFFF

R/W

User Offset Register

Address: 0x05, Reset: 0x058000, Name: USER_OFFSET

The 16-bit USER_OFFSET register allows the user to adjust the offset of the DAC channel by −32,768 LSBs to +32,768 LSBs in steps of 1 LSB.

The USER_OFFSET register coding is straight binary. The default code is 0x8000, which results in zero offset programmed to the output.

Table 32. Bit Descriptions for USER_OFFSET

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]

USER_OFFSET

User offset correction code.

0x8000

R/W

DAC Configuration Register

Address: 0x06, Reset: 0x060C00, Name: DAC_CONFIG

This register configures the DAC (range, internal/external RSET, and output enable), enables the output stage circuitry, and configures the

slew rate control function.

Table 33. Bit Descriptions for DAC_CONFIG

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

[15:13]

SR_STEP

Slew rate step. In conjunction with the slew rate clock, the slew rate step defines by

how much the output value changes at each update. Together, both parameters

define the rate of change of the output value.

0x0

R/W

000: 4 LSB (default).

001: 12 LSB.

010: 64 LSB.

011: 120 LSB.

100: 256 LSB.

101: 500 LSB.

110: 1820 LSB.

111: 2048 LSB.

AD5758 Datasheet(PDF) 56 Page - Analog Devices

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