SSM3525 datasheet(41/60 Pages) AD

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Data Sheet

SSM3525

Rev. A | Page 41 of 60

AUDIO LIMITER CONTROL 1 REGISTER

Address: 0x08, Reset: 0xA4, Name: LIM_CTRL1

Audio Lim iter Releas e Rate

11: 800 m s /dB.

10: 1200 m s /dB.

01: 1600 m s /dB.

00: 3200 m s /dB.

Lim iter or Mute Mode Enable

11:

is below VBAT_INF.

Lim iter on but only engages if VBAT

10: Output m utes if VBAT is below VBAT_INF

01: Lim iter on.

00: Lim iter and m ute m ode off.

Audio Lim iter Attack Rate

11: 20 µs /dB.

10: 30 µs /dB.

01: 60 µs /dB.

00: 120 µs /dB.

Thres hold Battery Tracking Enable

gain reduction with battery voltage.

Lim iter attack thres hold varies or

0: Lim iter attack thres hold fixed.

[7:6] LIM_RRT (R/W)

[1:0] LIM_EN (R/W)

[5:4] LIM_ATR (R/W)

[2] VBAT_TRACK (R/W)

[3] RESERVED

Table 30. Bit Descriptions for LIM_CTRL1

Bits

Bit Name

Settings

Description

Reset

Access

[7:6]

LIM_RRT

Audio Limiter Release Rate

0x2

R/W

3200 ms/dB.

1600 ms/dB.

1200 ms/dB.

800 ms/dB.

[5:4]

LIM_ATR

Audio Limiter Attack Rate

0x2

R/W

120 µs/dB.

60 µs/dB.

30 µs/dB.

20 µs/dB.

RESERVED

Reserved.

0x0

VBAT_TRACK

Threshold Battery Tracking Enable

0x1

R/W

Limiter attack threshold fixed.

Limiter attack threshold varies or gain reduction with battery voltage.

[1:0]

LIM_EN

Limiter or Mute Mode Enable

0x0

R/W

Limiter and mute mode off.

Limiter on.

Output mutes if VBAT is below VBAT_INF.

Limiter on but only engages if VBAT is below VBAT_INF.

SSM3525 Datasheet(PDF) 41 Page - Analog Devices

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