AD7771BCPZ datasheet(75/99 Pages) AD

75 / 99 page

AD7771

Data Sheet

Rev. 0 | Page 74 of 98

Bits

Bit Name

Settings

Description

Reset

Access

[3:1]

DCLK_CLK_DIV

Divide MCLK

0x0

R/W

000

Divide by 1

001

Divide by 2

010

Divide by 4

011

Divide by 8

100

Divide by 16

101

Divide by 32

110

Divide by 64

111

Divide by 128

RESERVED

Reserved

0x0

R/W

MAIN ADC METER AND REFERENCE MUX CONTROL REGISTER

Address: 0x015, Reset: 0x00, Name: ADC_MUX_CONFIG

SD ADC Reference Mux

11: External Reference REFx-/REFx+.

10: External Supply AVDD1x/AVSSx.

01: Internal Reference.

00: External Reference REFx+/REFx-

SD ADC Meter Mux

1001: External Reference REFx+/REFx+.

1000: Internal Reference +/+.

0111: Internal Reference -/+.

0110: Internal Reference +/-

0101: External Reference REFx-/REFx-

0100: External Reference REFx-/REFx+.

0011: External Reference REFx+/REFx-

0010: 280m V.

[7:6] REF_MUX_CTRL (R/W)

[1:0] RESERVED

[5:2] MTR_MUX_CTRL (R/W)

Table 65. Bit Descriptions for ADC_MUX_CONFIG

Bits

Bit Name

Settings

Description

Reset

Access

[7:6]

REF_MUX_CTRL

Σ-Δ ADC Reference Mux.

0x0

R/W

External reference REFx+/REFx−.

Internal reference.

External supply AVDD1x/AVSSx.

External reference REFx−/REFx+.

[5:2]

MTR_MUX_CTRL

Σ-Δ ADC Meter Mux.

0x0

R/W

0010

280 mV.

0011

External reference REFx+/REFx−.

0100

External reference REFx−/REFx+.

0101

External reference REFx−/REFx−.

0110

Internal reference +/−.

0111

Internal reference −/+.

1000

Internal reference +/+.

1001

External reference REFx+/REFx+.

[1:0]

RESERVED

Reserved.

0x0

R/W

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