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Data Sheet

AD5758

Rev. 0 | Page 59 of 72

Bits

Bit Name

Description

Reset

Access

[9:7]

CLKOUT_FREQ

Configure the frequency of CLKOUT.

0x4

R/W

000: 416 kHz.

001: 435 kHz.

010: 454 kHz.

011: 476 kHz.

100: 500 kHz (default).

101: 526 kHz.

110: 555 kHz.

111: 588 kHz.

HART_EN

Enable the path to the CHART pin.

0x0

R/W

0: output of the DAC drives the output stage directly (default).

1: CHART path is coupled to the DAC output to allow a HART modem connection or

connection of a slew capacitor.

NEG_OFFSET_EN

Enable negative offset in unipolar VOUT mode. When set, this bit offsets the

currently enabled unipolar output range by the value listed here. This bit is only

applicable to the 0 V to 6 V range and the 0 V to 12 V range. The 0 V to 6 V range

becomes −300 mV to 5.7 V; the 0 V to 12 V range becomes −400 mV to 11.6 V.

0x0

R/W

0: disable (default).

1: enable.

CLEAR_NOW_EN

Enables clear to occur immediately, even if the output slew feature is currently enabled.

0x0

R/W

0: disable (default).

1: enable.

SPI_DIAG_QUIET_EN

Enable SPI diagnostic quiet mode. When this bit is enabled, SPI_CRC_ERR, SLIPBIT_ERR,

and SCLK_COUNT_ERR are not included in the logical OR calculation, which creates the

DIG_DIAG_STATUS bit in the status register. They are also masked from affecting

the FAULT pin if this bit is set.

0x0

R/W

0: disable (default).

1: enable.

OSC_STOP_DETECT_EN

Enable automatic 0x07DEAD code on SDO if the internal oscillator (MCLK) stops.

0x1

R/W

0: disable.

1: enable (default).

Reserved

Reserved. Do not alter the default value of this bit.

0x0

R/W

Reserved

Reserved. Do not alter the default value of this bit.

0x0

R/W

General-Purpose Configuration 2 Register

Address: 0x0A, Reset: 0x0A0200, Name: GP_CONFIG2

This register is used to configure and enable functions such as the voltage comparators, the internal current output monitor, and the

global software LDAC.

Table 37. Bit Descriptions for GP_CONFIG2

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

Reserved

Reserved. Do not alter the default value if this bit.

0x0

[14:13]

COMPARATOR_CONFIG

Enable/disable the voltage comparator inputs for test pur

poses. The

temperature comparator is permanently enabled. See the Background

Supply and Temperature Monitoring section.

0x0

R/W

00: disable voltage comparators (default).

01: reserved.

10: reserved.

11: enable voltage comparators. The INT_EN bit in the DAC_CONFIG register

must be set for the REFIN buffer to be powered up and this node

available to the REFIN comparator.

AD5758 Datasheet(PDF) 59 Page - Analog Devices

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