lm49350rl National Semiconductor Corporation, lm49350rl Datasheet - Page 65

• Manufacturer Part Number: lm49350rl
• Description: High Performance Audio Codec Sub-system With A Ground-referenced Stereo Headphone Amplifier & An Ultra Low Emi Class D Loudspeaker Amplifier With Dual I2s/pcm Digital Audio Interfaces
• Manufacturer: National Semiconductor Corporation

Bits
4:0
7:5
PK_DECAY_RATE
DECAY_RATE
Field
This sets the rate at which the ALC will increase gain if it detects the input signal is too
small.
TABLE 51. ADC_ALC_5 (0x85h)
PK_DECAY_RATE
DECAY_RATE
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
000
001
010
011
100
101
110
111
65
Description
Time between gain steps (μs)
Max Time to track decay
500000 (0.5s)
2.73 secs
42.6.3ms
100000
125000
160000
225000
300000
375000
10.6ms
21.3ms
85.5ms
11000
14000
18500
25000
32000
42000
55000
72500
1.3ms
2.6ms
5.3ms
1250
1396
2000
2708
3500
4750
6250
8000
104
125
167
250
292
396
500
708
896
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