ADAU1772BCPZ-R7 datasheet(82/117 Pages) AD

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Data Sheet

ADAU1772

Rev. C | Page 81 of 116

Table 65. Bit Descriptions for PGA_CONTROL_1

Bits

Bit Name

Settings

Description

Reset

Access

PGA_EN1

Select line or microphone input. Note that the PGA inverts the signal

going through it.

0x0

AIN1 used as a single-ended line input. PGA powered down.

AIN1 used as a single-ended microphone input. PGA powered up with

slewing.

PGA_MUTE1

Enable PGA1 mute. When PGA is muted, PGA_GAIN1 is ignored.

0x1

Unmuted

Muted

[5:0]

PGA_GAIN1

Set the gain of PGA1.

0x0

000000

−12 dB

000001

−11.25 dB

010000

0 dB

111110

+34.5 dB

111111

+35.25 dB

PGA CONTROL 2 REGISTER

Address: 0x0025, Reset: 0x40, Name: PGA_CONTROL_2

This register controls the PGA connected to AIN2.

Table 66. Bit Descriptions for PGA_CONTROL_2

Bits

Bit Name

Settings

Description

Reset

Access

PGA_EN2

Select line or microphone input. Note that the PGA inverts the signal

going through it.

0x0

AIN2 used as a single-ended line input. PGA powered down.

AIN2 used as a single-ended microphone input. PGA powered up with

slewing.

PGA_MUTE2

Enable PGA2 mute. When PGA is muted, PGA_GAIN2 is ignored.

0x1

Unmuted

Muted

[5:0]

PGA_GAIN2

Set the gain of PGA2.

0x0

000000

−12 dB

000001

−11.25 dB

010000

0 dB

111110

+34.5 dB

111111

+35.25 dB

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