User guide

MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
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V
VOL
(V) SPEAKER MODE GAIN (dB)
HEADPHONE MODE GAIN
(dB)
V
MIN
*
V
MAX
*
HPV
DD
*
GAIN1 = 0,
GAIN2 = 0
GAIN1 = 1,
GAIN2 = 0
GAIN1 = 0,
GAIN2 = 1
GAIN1 = 1
GAIN2 = 1
GAIN1 = X,
GAIN2 = 0
GAIN1 = X,
GAIN2 = 1
0 0.49 0.074 15 16.5 18 19.5 0 3
0.49
0.5673
0.160 14 16 17.5 19 -1 2.5
0.5673
0.6447
0.183 13 15 17 18.5 -2 2
0.6447 0.722 0.207 12 14 16.5 18 -3 1.5
0.722
0.7994
0.230 10 13 16 17.5 -5 1
0.7994
0.8767
0.253 8 12 15 17 -7 0
0.8767
0.9541
0.277 6 10 14 16.5 -9 -1
0.9541
1.0314
0.300 4 8 13 16 -11 -2
1.0314
1.1088
0.324 2 6 12 15 -13 -3
1.1088
1.1861
0.347 0 4 10 14 -15 -5
1.1861
1.2635
0.371 -2 2 8 13 -17 -7
1.2635
1.3408
0.394 -4 0 6 12 -19 -9
1.3408
1.4182
0.418 -6 -2 4 10 -21 -11
1.4182
1.4955
0.441 -8 -4 2 8 -23 -13
1.4955
1.5728
0.464 -10 -6 0 6 -25 -15
1.5728
1.6502
0.488 -12 -8 -2 4 -27 -17
1.6502
1.7275
0.511 -14 -10 -4 2 -29 -19
1.7275
1.8049
0.535 -16 -12 -6 0 -31 -21
1.8049
1.8822
0.558 -18 -14 -8 -2 -33 -23
1.8822
1.9596
0.582 -20 -16 -10 -4 -35 -25
1.9596
2.0369
0.605 -22 -18 -12 -6 -37 -27
2.0369
2.1143
0.628 -24 -20 -14 -8 -39 -29
2.1143
2.1916
0.652 -26 -22 -16 -10 -41 -31
2.1916 2.269 0.675 -28 -24 -18 -12 -43 -33
2.269
2.3463
0.699 -32 -26 -20 -14 -47 -35
2.3463
2.4237
0.722 -36 -28 -22 -16 -51 -37
2.4237 2.501 0.746 -40 -32 -24 -18 -55 -39
2.501
2.5783
0.769 -44 -36 -26 -20 -59 -41
2.5783
2.6557
0.793 -48 -40 -28 -22 -63 -43
2.6557 2.733 0.816 -52 -44 -32 -24 -67 -47
2.733
2.8104
0.839 -56 -48 -36 -26 -71 -51
2.8104 3.3 0.858 MUTE MUTE MUTE MUTE MUTE MUTE
Table 3B. MAX9750B Volume Levels
*Based on HPV
DD
= 3.3V
X = Don’t care.