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LM49352 数据表(PDF) 82 Page - Texas Instruments

部件名 LM49352
功能描述  Boomer Mono Class D Audio Codec Subsystem with Ground Referenced Headphone Amplifiers, Earpiece Driver, and Audio DSP
PDF  106 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LM49352 数据表(HTML) 82 Page - Texas Instruments

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LM49352
SNAS467E – MARCH 2009 – REVISED MARCH 2013
www.ti.com
Table 68. DAC_ALC_5 (0xA4h)
Bits
Field
Description
4:0
DECAY_RATE
This sets the rate at which the ALC will increase gain if it detects the input signal is too
small.
DECAY_RATE
Time between gain steps(us)
00000
104
00001
125
00010
167
00011
250
00100
292
00101
396
00110
500
00111
708
01000
896
01001
1250
01010
1396 (Default)
01011
2000
01100
2708
01101
3500
01110
4750
01111
6250
10000
8000
10001
11000
10010
14000
10011
18500
10100
25000
10101
32000
10110
42000
10111
55000
11000
72500
11001
100000
11010
125000
11011
160000
11100
225000
11101
300000
11110
375000
11111
500000 (0.5s)
7:5
PK_DECAY_RATE
This sets how precise the ALC will track amplitude reductions of the audio input. The
shorter the length of time for PK_DECAY_RATE, the more responsive the ALC will be
when applying gain increases whenever the audio falls below target level.
PK_DECAY_RATE
Time
000
1.3ms (Default)
001
2.6ms
010
5.3ms
011
10.6ms
100
21.3ms
101
42.6ms
110
85.5ms
111
2.73secs
82
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