LM4838ITLX NSC [National Semiconductor], LM4838ITLX Datasheet - Page 20

• Manufacturer Part Number: LM4838ITLX
• Description: Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
• Manufacturer: NSC [National Semiconductor]

www.national.com
Application Information
VOLUME CONTROL TABLE ( Table 2 )
Gain
(dB)
0
-1
-2
-3
-4
-5
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
-32
-34
-36
-39
-42
-45
-47
-51
-56
-61
-66
-78
Low
77.5% 100.00%
75.0% 78.5%
72.5% 76.25%
70.0% 73.75%
67.5% 71.25%
65.0% 68.75%
62.5% 66.25%
60.0% 63.75%
57.5% 61.25%
55.0% 58.75%
52.5% 56.25%
50.0% 53.75%
47.5% 51.25%
45.0% 48.75%
42.5% 46.25%
40.0% 43.75%
37.5% 41.25%
35.0% 38.75%
32.5% 36.25%
30.0% 33.75%
27.5% 31.25%
25.0% 28.75%
22.5% 26.25%
20.0% 23.75%
17.5% 21.25%
15.0% 18.75%
12.5% 16.25%
10.0% 13.75%
7.5%
5.0%
0.0%
Voltage Range (% of Vdd)
High
11.25%
8.75%
6.25%
Recommended
100.000%
76.875%
74.375%
71.875%
69.375%
66.875%
64.375%
61.875%
59.375%
56.875%
54.375%
51.875%
49.375%
46.875%
44.375%
41.875%
39.375%
36.875%
34.375%
31.875%
29.375%
26.875%
24.375%
21.875%
19.375%
16.875%
14.375%
11.875%
9.375%
6.875%
0.000%
(Continued)
Low
3.875
3.750
3.625
3.500
3.375
3.250
3.125
3.000
2.875
2.750
2.625
2.500
2.375
2.250
2.125
2.000
1.875
1.750
1.625
1.500
1.375
1.250
1.125
1.000
0.875
0.750
0.625
0.500
0.375
0.250
0.000
Voltage Range (Vdd = 5)
High
5.000
3.938
3.813
3.688
3.563
3.438
3.313
3.188
3.063
2.938
2.813
2.688
2.563
2.438
2.313
2.188
2.063
1.938
1.813
1.688
1.563
1.438
1.313
1.188
1.063
0.937
0.812
0.687
0.562
0.437
0.312
20
Recommended
5.000
3.844
3.719
3.594
3.469
3.344
3.219
3.094
2.969
2.844
2.719
2.594
2.469
2.344
2.219
2.094
1.969
1.844
1.719
1.594
1.469
1.344
1.219
1.094
0.969
0.844
0.719
0.594
0.469
0.344
0.000
Low
2.325
2.250
2.175
2.100
2.025
1.950
1.875
1.800
1.725
1.650
1.575
1.500
1.425
1.350
1.275
1.200
1.125
1.050
0.975
0.900
0.825
0.750
0.675
0.600
0.525
0.450
0.375
0.300
0.225
0.150
0.000
Voltage Range (Vdd = 3)
High
3.000
2.363
2.288
2.213
2.138
2.063
1.988
1.913
1.838
1.763
1.688
1.613
1.538
1.463
1.388
1.313
1.238
1.163
1.088
1.013
0.937
0.862
0.787
0.712
0.637
0.562
0.487
0.412
0.337
0.262
0.187
Recommended
3.000
2.306
2.231
2.156
2.081
2.006
1.931
1.856
1.781
1.706
1.631
1.556
1.481
1.406
1.331
1.256
1.181
1.106
1.031
0.956
0.881
0.806
0.731
0.656
0.581
0.506
0.431
0.356
0.281
0.206
0.000