Datasheet
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Default Mode
VOLUME CONTROL
TPA6130A2
SLOS488B – NOVEMBER 2006 – REVISED FEBRUARY 2008
The TPA6130A2 starts up with the following conditions:
• SWS = Off, CHARGE PUMP = On
• HP ENABLES = Off
• HiZ = Off
• MODE = Stereo
• HP MUTES = On, VOLUME = -59.5 dB,
The TPA6130A2 volume control is set through the I
2
C interface. The six volume control register bits are decoded
to 64 volume settings that employ an audio taper. See Table 2 for the gain table. The values listed in this table
are typical. Each gain step has a different input impedance. See Figure 33 .
Table 2. Audio Taper Gain Values
Gain Control Word Nominal Gain (dB) Nominal Gain (V/V) Gain Control Word Nominal Gain Nominal Gain (V/V)
(Binary) Mute [7:6], (Binary) Mute [7:6], (dB)
V[5:0] V[5:0]
11XXXXXX – 100 0.00001 00100000 – 10.9 0.283
00000000 – 59.5 0.001 00100001 – 10.3 0.305
00000001 – 53.5 0.002 00100010 – 9.7 0.329
00000010 – 50.0 0.003 00100011 – 9.0 0.353
00000011 – 47.5 0.004 00100100 – 8.5 0.379
00000100 – 45.5 0.005 00100101 – 7.8 0.405
00000101 – 43.9 0.007 00100110 – 7.2 0.433
00000110 – 41.4 0.009 00100111 – 6.7 0.462
00000111 – 39.5 0.012 00101000 – 6.1 0.493
00001000 – 36.5 0.015 00101001 – 5.6 0.524
00001001 – 35.3 0.018 00101010 – 5.1 0.557
00001010 – 33.3 0.022 00101011 – 4.5 0.591
00001011 – 31.7 0.026 00101100 – 4.1 0.627
00001100 – 30.4 0.031 00101101 – 3.5 0.664
00001101 – 28.6 0.037 00101110 – 3.1 0.702
00001110 – 27.1 0.043 00101111 – 2.6 0.742
00001111 – 26.3 0.050 00110000 – 2.1 0.783
00010000 – 24.7 0.057 00110001 – 1.7 0.825
00010001 – 23.7 0.065 00110010 – 1.2 0.870
00010010 – 22.5 0.074 00110011 – 0.8 0.915
00010011 – 21.7 0.084 00110100 – 0.3 0.962
00010100 – 20.5 0.093 00110101 0.1 1.010
00010101 – 19.6 0.104 00110110 0.5 1.061
00010110 – 18.8 0.116 00110111 0.9 1.112
00010111 – 17.8 0.129 00111000 1.4 1.165
00011000 – 17.0 0.142 00111001 1.7 1.220
00011001 – 16.2 0.156 00111010 2.1 1.277
00011010 – 15.2 0.172 00111011 2.5 1.335
00011011 – 14.5 0.188 00111100 2.9 1.395
00011100 – 13.7 0.205 00111101 3.3 1.456
00011101 – 13.0 0.223 00111110 3.6 1.520
00011110 – 12.3 0.242 00111111 4.0 1.585
00011111 – 11.6 0.262
20 Copyright © 2006 – 2008, Texas Instruments Incorporated
Product Folder Link(s): TPA6130A2