LM49350RL/NOPB National Semiconductor, LM49350RL/NOPB Datasheet - Page 82
LM49350RL/NOPB
Manufacturer Part Number
LM49350RL/NOPB
Description
IC AUDIO SUBSYSTM 2W D 36USMDXT
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class Dr
Datasheet
1.LM49350RLNOPB.pdf
(104 pages)
Specifications of LM49350RL/NOPB
Output Type
1-Channel (Mono) with Mono and Stereo Headphones
Max Output Power X Channels @ Load
2W x 1 @ 4 Ohm; 69mW x 2 @ 32 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
3D, DAC, Depop, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Mounting Type
Surface Mount
Package / Case
36-MicroSMDxt
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM49350RLTR
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Bits
4:0
7:5
PK_DECAY_RATE
DECAY_RATE
Field
TABLE 70. DAC_ALC_5 (0xA4h)
This sets the rate at which the ALC will increase gain
if it detects the input signal is too small.
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
DECAY_RATE
82
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
Description
Time between gain steps
500000 (0.5s)
2.73secs
100000
125000
160000
225000
300000
375000
10.6ms
21.3ms
42.6ms
85.5ms
11000
14000
18500
25000
32000
42000
55000
72500
1.3ms
2.6ms
5.3ms
1250
1396
2000
2708
3500
4750
6250
8000
Time
(us)
104
125
167
250
292
396
500
708
896
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