參數(shù)資料
型號： MAX9850
廠商： Maxim Integrated Products, Inc.
英文描述： Stereo Audio DAC with DirectDrive Headphone Amplifier
中文描述： 立體聲音頻DAC，帶有DirectDrive®耳機放大器
文件頁數(shù)： 33/36頁
文件大?。?/td> 956K
代理商： MAX9850
The DAC begins its soft-start routine after being enabled
and after receiving 32 LRCLK cycles. All internal filters
are initialized and the DAC gain gradually ramps to
maximum. The MAX9850’s headphone output level is
determined by the headphone amplifier volume setting.
Mute the audio outputs before powering down the
MAX9850 by setting MUTE to 1 (register 0x2, bit B7).
Ramping the volume to its maximum attenuation is an
alternative to muting the output. VMN in the status A reg-
ister (register 0x0, bit B3) notifies the μC when the out-
puts are at maximum attenuation. Disable the
headphone and line outputs once the audio is fully atten-
uated. Headphone and line outputs can be disabled
within 50μs without any audible clicks or pops, once the
audio is fully attenuated. Place the MAX9850 in shut-
down after the outputs are disabled.
Stereo Speakerphone
The MAX9850 can be combined with a stereo speaker
amplifier to create a complete speakerphone playback
solution. The MAX9701, or another Maxim stereo
speaker amplifier, can be used to drive the speakers
while the MAX9850’s integrated DirectDrive headphone
amplifier drives the headphones (see Figure 12).
Configure GPIO to output high when a headphone is not
connected and low when the headphone is connected.
Connect GPIO to the
SHDN
control of the MAX9701.
Configure the interrupt enable register to set ALERT (reg-
ister 0x0, bit B7) when HPS changes state. The μC polls
the status A register and waits for ALERT to set when
HPS changes state. The μC changes the state of GPIO
when ALERT is set, either turning off the speaker amp
because a headphone is connected or enabling the
speaker amp when the headphone is disconnected.
M
Stereo Audio DAC with DirectDrive
Headphone Amplifier
______________________________________________________________________________________
33
μ
C
MAX9850
MAX9701
*
1.8V TO 3.6V
3.3V TO 5.5V
0.47
μ
F
AGND
DGND
PGND
PGND
SHDN
PV
SS
SV
SS
OUTR+
OUTR-
INL+
INL-
OUTL+
OUTL-
INR+
INR-
HPL
HPS
HPR
AV
DD
V
DD
PV
DD
DV
DD
DV
DD
DIGITAL
AUDIO
SOURCE
SDIN
MCLK
C1N
C1P
REF
SDA
10k
SCL
BCLK
LRCLK
*FUTURE PRODUCT—CONTACT FACTORY FOR AVAILABILITY.
1
μ
F
1
μ
F
1
μ
F
0.47
μ
F
0.47
μ
F
0.47
μ
F
0.47
μ
F
2.2
μ
F
1
μ
F
GPIO
OUTR
OUTL
Figure 12. Stereo Speakerphone
相關(guān)PDF資料
PDF描述
MAX9850ETI Stereo Audio DAC with DirectDrive Headphone Amplifier
MAX9995ETX-D Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX-T Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX-TD Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX98500EVKIT+ 功能描述:音頻 IC 開發(fā)工具 MAX98500 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
MAX98500EWE+ 制造商:Maxim Integrated Products 功能描述:BOOSTED CLASS D AMPLIFIER WITH ALC - Rail/Tube
MAX98500EWE+T 功能描述:音頻放大器 2.2W Mono Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX98502EVKIT# 功能描述:放大器 IC 開發(fā)工具 MAX98502 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V
MAX98502EWE+ 功能描述:音頻放大器 Boosted Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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