LM49352RLX/NOPB National Semiconductor, LM49352RLX/NOPB Datasheet - Page 90

• Manufacturer Part Number: LM49352RLX/NOPB
• Description: IC AMP AUDIO MONO D1.4W 36USMD
• Manufacturer: National Semiconductor
• Series: Boomer®, PowerWise®r
• Type: Class Dr

Specifications of LM49352RLX/NOPB

• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1.4W x 1 @ 8 Ohm; 65mW x 2 @ 32 Ohm
• Features: Depop, Differential Inputs, I²C, I²S, Microphone, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 36-MicroSMDxt
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Other names: LM49352RLX

www.national.com
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.
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
TABLE 68. DAC_ALC_5 (0xA4h)
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
90
Description
Time between gain steps(us)
1.3ms (Default)
1396 (Default)
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
2.6ms
5.3ms
1250
2000
2708
3500
4750
6250
8000
Time
104
125
167
250
292
396
500
708
896