lm4838mtx National Semiconductor Corporation, lm4838mtx Datasheet - Page 21

• Manufacturer Part Number: lm4838mtx
• Description: Stereo 2w Audio Power Amplifiers With Dc Volume Control And Selectable Gain
• Manufacturer: National Semiconductor Corporation

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
21
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
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