MAX9776 Maxim Integrated Products, MAX9776 Datasheet - Page 30

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MAX9776

Manufacturer Part Number
MAX9776
Description
(MAX9775 / MAX9776) Stereo Class D Audio Subsystem
Manufacturer
Maxim Integrated Products
Datasheet

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2 x 1.5W, Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
MONO+6dB in the Output Mode Control register allows
an extra 6dB of gain on the internal mono signal:
1 = Additional 6dB of gain is applied to the internal
Mono (M) signal path.
0 = No additional gain is applied to the Internal Mono
(M) signal path.
The MAX9775 has five output amplifiers: a mono
receiver amplifier, a stereo DirectDrive headphone
Table 8. Output Mode Control Register
Table 9. Output Modes
— = Amplifier off.
L = Left signal.
R = Right signal.
M = Mono signal.
30
Output Mode Control
MODE
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
______________________________________________________________________________________
B3
REGISTER
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
B2
OUTMODE
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
B0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
B7
1
RECEIVER
M + L + R
MUTE
L + R
B6
M
0
B5
LEFT HP
0
MUTE
L + M
L + M
M
M
L
L
amplifier, and a stereo Class D amplifier. The MAX9776
has four output amplifiers: a mono receiver amplifier, a
stereo DirectDrive headphone amplifier, and a mono
Class D amplifier.
Table 9 shows how each of the three internal signals—
Left (L), Right (R), and Mono (M)—are mixed and rout-
ed to the various outputs.
MONO+6dB
RIGHT HP
B4
R + M
R + M
MUTE
M
M
R
R
LEFT SPK RIGHT SPK
MUTE
L + M
L + M
B3
M
M
L
L
MAX9775
OUTMODE (Table 9)
B2
R + M
R + M
MUTE
Output Mode Control
M
M
R
R
B1
L + R + M
L + R + M
MAX9776
MUTE
L + R
L + R
SPK
M
M
B0

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