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MAX9879 Datasheet(PDF) 23 Page - Analog Devices

Part # MAX9879
Description  Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

MAX9879 Datasheet(HTML) 23 Page - Analog Devices

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MAX9879
Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
23
Maxim Integrated
Shutdown (S
SH
HD
DN
N)
1 = MAX9879 operational.
0 = MAX9879 in low-power shutdown mode.
SHDN is an active-low shutdown bit that overrides all
settings and places the entire device in low-power shut-
down mode. The I2C interface is fully active in this shut-
down mode and bypass mode remains operational.
Volume Control
The device has a separate volume control for left head-
phone, right headphone, and speaker amplifiers. The
total system gain is a combination of the input gain, the
volume control, and the output amplifier gain. Table 4
shows the volume settings for each volume control.
Table 4. Volume Control Settings
_VOL
CODE
B4
B3
B2
B1
B0
GAIN (dB)
0
0
0
0
0
0
MUTE
1
0
0
0
0
1
-75
2
0
0
0
1
0
-71
3
0
0
0
1
1
-67
4
0
0
1
0
0
-63
5
0
0
1
0
1
-59
6
0
0
1
1
0
-55
7
0
0
1
1
1
-51
8
0
1
0
0
0
-47
9
0
1
0
0
1
-44
10
0
1
0
1
0
-41
11
0
1
0
1
1
-38
12
0
1
1
0
0
-35
13
0
1
1
0
1
-32
14
0
1
1
1
0
-29
15
0
1
1
1
1
-26
_VOL
CODE
B4
B3
B2
B1
B0
GAIN (dB)
16
1
0
0
0
0
-23
17
1
0
0
0
1
-21
18
1
0
0
1
0
-19
19
1
0
0
1
1
-17
20
1
0
1
0
0
-15
21
1
0
1
0
1
-13
22
1
0
1
1
0
-11
23
1
0
1
1
1
-9
24
1
1
0
0
0
-7
25
1
1
0
0
1
-6
26
1
1
0
1
0
-5
27
1
1
0
1
1
-4
28
1
1
1
0
0
-3
29
1
1
1
0
1
-2
30
1
1
1
1
0
-1
31
1
1
1
1
1
0
Table 5. Output Mode Control
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
0x04
SHDN
BYPASS
0
ENB
ENA
LSPK
EN
RSPK
EN
HPEN
Table 3. Speaker/Left Headphone/Right Headphone Volume Control
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
0x01
0
0
0
SVOL (Table 4)
0x02
0
0
0
HPLVOL (Table 4)
0x03
0
0
0
HPRVOL (Table 4)



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