參數(shù)資料
型號(hào)： MAX9750CETI
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 音頻／視頻放大
英文描述： 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers
中文描述： 2.2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC28
封裝： 5 X 5 MM, 0.80 MM HEIGHT, TQFN-28
文件頁數(shù)： 18/31頁
文件大?。?/td> 673K
代理商： MAX9750CETI
M
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
18
______________________________________________________________________________________
Headphone Amplifier
In conventional single-supply headphone amplifiers,
the output-coupling capacitor is a major contributor of
audible clicks and pops. Upon startup, the amplifier
charges the coupling capacitor to its bias voltage, typi-
cally half the supply. Likewise, during shutdown, the
capacitor is discharged to GND. A DC shift across the
capacitor results, which in turn appears as an audible
transient at the speaker. Since the MAX9750/MAX9751/
MAX9755 do not require output-coupling capacitors, no
audible transient occurs.
Additionally, the MAX9750/MAX9751/MAX9755 features
extensive click-and-pop suppression that eliminates
any audible transient sources internal to the device.
The Power-Up/Down Waveform in the
Typical
Operating Characteristics
shows that there are minimal
spectral components in the audible range at the output
upon startup and shutdown.
Figure 7a. Volume Control Transfer Function
-80
-60
-70
-40
-50
-20
-30
-10
10
0
20
0
1.0
1.5
0.5
2.0
2.5
3.0
3.5
4.0
MAX9750A
VOLUME CONTROL TRANSFER FUNCTION
V
VOL
(V)
G
AUDIO
TAPER
GAIN1 = GAIN2 = 0
SPEAKER MODE
HEADPHONE MODE
Figure 7b. Volume Control Transfer Function
-80
-60
-70
-40
-50
-20
-30
-10
10
0
20
0
1.0
1.5
0.5
2.0
2.5
3.0
3.5
4.0
MAX9750B
VOLUME CONTROL TRANSFER FUNCTION
V
VOL
(V)
G
AUDIO
TAPER
GAIN1 = GAIN2 = 0
SPEAKER MODE
HEADPHONE MODE
Figure 7c. Volume Control Transfer Function
-80
-60
-70
-40
-50
-20
-30
-10
10
0
20
0
1.0
1.5
0.5
2.0
2.5
3.0
3.5
4.0
MAX9750C
VOLUME CONTROL TRANSFER FUNCTION
V
VOL
(V)
G
AUDIO
TAPER
GAIN1 = GAIN2 = 0
SPEAKER MODE
HEADPHONE MODE
MAX9750
R
S3
47k
BEEP
0.47
μ
F
SOURCE 3
R
S2
47k
0.47
μ
F
SOURCE 2
R
S1
47k
0.47
μ
F
SOURCE 1
R
INT
47k
BIAS
WINDOW
DETECTOR
(0.3V
P-P
THRESHOLD)
FREQUENCY
DETECTOR
(300Hz THRESHOLD)
SPEAKER/HEADPHONE
AMPLIFER INPUTS
V
OUT(BEEP)
Figure 8. Beep Input
相關(guān)PDF資料
PDF描述
MAX9750CEUI 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers
MAX9750AETI 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers
MAX9750AEUI 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers
MAX9750BETI 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers
MAX9759 3.2W, High-Efficiency, Low-EMI, Filterless, Class D Audio Amplifier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9750CETI+ 功能描述:音頻放大器 Integrated Circuits (ICs) 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX9750CETI+C2U 功能描述:音頻放大器 Integrated Circuits (ICs) 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX9750CETI+T 功能描述:音頻放大器 Integrated Circuits (ICs) 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX9750CEUI 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX9751ETI+ 功能描述:音頻放大器 Integrated Circuits (ICs) 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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