User guide

MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
18 ______________________________________________________________________________________
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 6 7.5 9 10.5 0 3
0.49
0.5673
0.160 5 7 8.5 10 -1 2.5
0.5673
0.6447
0.183 4 6 8 9.5 -2 2
0.6447 0.722 0.207 3 5 7.5 9 -3 1.5
0.722
0.7994
0.230 1 4 7 8.5 -5 1
0.7994
0.8767
0.253 -1 3 6 8 -7 0
0.8767
0.9541
0.277 -3 1 5 7.5 -9 -1
0.9541
1.0314
0.300 -5 -1 4 7 -11 -2
1.0314
1.1088
0.324 -7 -3 3 6 -13 -3
1.1088
1.1861
0.347 -9 -5 1 5 -15 -5
1.1861
1.2635
0.371 -11 -7 -1 4 -17 -7
1.2635
1.3408
0.394 -13 -9 -3 3 -19 -9
1.3408
1.4182
0.418 -15 -11 -5 1 -21 -11
1.4182
1.4955
0.441 -17 -13 -7 -1 -23 -13
1.4955
1.5728
0.464 -19 -15 -9 -3 -25 -15
1.5728
1.6502
0.488 -21 -17 -11 -5 -27 -17
1.6502
1.7275
0.511 -23 -19 -13 -7 -29 -19
1.7275
1.8049
0.535 -25 -21 -15 -9 -31 -21
1.8049
1.8822
0.558 -27 -23 -17 -11 -33 -23
1.8822
1.9596
0.582 -29 -25 -9 -13 -35 -25
1.9596
2.0369
0.605 -31 -27 -21 -15 -37 -27
2.0369
2.1143
0.628 -33 -29 -23 -17 -39 -29
2.1143
2.1916
0.652 -35 -31 -2 -19 -41 -31
2.1916 2.269 0.675 -37 -3 -27 -21 -43 -33
2.269
2.3463
0.699 -41 -35 -29 -23 -47 -35
2.3463
2.4237
0.722 -45 -37 -31 -25 -51 -37
2.4237 2.501 0.746 -48 -41 -33 -27 -55 -39
2.501
2.5783
0.769 -53 -45 -35 -29 -59 -41
2.5783
2.6557
0.793 -57 -49 -37 -31 -63 -43
2.6557 2.733 0.816 -61 -53 -41 -33 -67 -47
2.733
2.8104
0.839 -65 -57 -45 -35 -71 -51
2.8104 3.3 0.858 MUTE MUTE MUTE MUTE MUTE MUTE
Table 3C. MAX9750C Volume Levels
*Based on HPV
DD
= 3.3V
X = Don’t care.