AD4697 datasheet(99/107 Pages) AD

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Data Sheet

AD4697/AD4698

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Rev. 0 | 99 of 107

Table 46. Bit Descriptions for REF_CTRL

Bits

Bit Name

Description

Reset

Access

0: reference buffer boost mode disabled.

1: reference buffer boost mode enabled.

[4:2]

VREF_SET

Reference Input Range Control. This field configures the device to optimize performance based on the reference

voltage in use. This field must be programmed to match the VREF applied to the REF pin (see the Voltage

Reference Input section).

0x4

R/W

0x0: 2.4 V ≤ VREF ≤ 2.75 V.

0x1: 2.75 V < VREF ≤ 3.25 V.

0x2: 3.25 V < VREF ≤ 3.75 V.

0x3: 3.75 V < VREF ≤ 4.50 V.

0x4: 4.5 V < VREF ≤ 5.10 V.

REFHIZ_EN

Reference Input High-Z Mode Enable Bit. This bit enables or disables reference input high-Z mode (see the

Reference Input High-Z Mode section).

0x1

R/W

0: disable reference input high-Z mode.

1: enable reference input high-Z mode.

REFBUF_EN

Reference Buffer Enable Bit. Enables or disables the reference buffer. Setting REFBUF_EN to 1 also forces the

reference buffer bypass switch to open (see the Internal Reference Buffer section). This bit is only active on the

WLCSP option. Setting this bit on the LFCSP option has no effect.

0x0

R/W

0: disables the internal reference buffer.

1: enables the internal reference buffer.

Sequencer Control Register

Address: 0x0022, Reset: 0x80, Name: SEQ_CTRL

Table 47. Bit Descriptions for SEQ_CTRL

Bits

Bit Name

Description

Reset

Access

STD_SEQ_EN

Standard Sequencer Enable Bit. This bit enables or disables the standard sequencer (see the Channel

Sequencing Modes section).

0x1

R/W

0: standard sequencer disabled.

1: standard sequencer enabled.

[6:0]

NUM_SLOTS_AS

Number of Advanced Sequencer Slots Field. This field determines the number of slots in a sequence when the

advanced sequencer is enabled. The number of slots is equal to NUM_SLOTS_AS + 1. This field must be set to

0x00 to enable two-cycle command mode or single-cycle command mode (see the Channel Sequencing Modes

section).

0x0

R/W

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