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參數(shù)資料
| 型號(hào)： | MAX9727EEP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 3/13頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO QUAD AB DIFF 20QSOP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 系列： | DirectDrive® |
| 類(lèi)型： | AB 類(lèi) |
| 輸出類(lèi)型： | 4-通道（四路） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點(diǎn)： | 消除爆音，差分輸入，關(guān)閉，熱保護(hù) |
| 安裝類(lèi)型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 20-QSOP |
| 封裝/外殼： | 20-SSOP（0.154"，3.90mm 寬） |
| 包裝： | 管件 |
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Flying Capacitor (C1)
The value of the flying capacitor (C1) affects the load
regulation and the output resistance of the charge
pump. A C1 value that is too small degrades the
device’s ability to provide sufficient current drive, which
leads to a loss of output voltage. Increasing the value
of C1 improves the load regulation and reduces the
charge-pump output resistance to an extent. See the
Charge-Pump Output Voltage vs. Output Current
graphs in the
Typical Operating Characteristics. Above
2.2F, the on-resistance of the switches and the ESR of
C1 and C2 dominate.
Hold Capacitor (C2)
The hold capacitor value and ESR directly affect the
ripple at PVSS. Increasing the value of C2 reduces the
output ripple. Likewise, decreasing the ESR of C2
reduces both ripple and output resistance. Lower
capacitance values can be used in systems with low
maximum output voltage levels. See the Charge-Pump
Output Voltage vs. Output Current graphs in the
Typical
Operating Characteristics. C2 should be greater than
or equal to the value of C1.
PVDD Bypass Capacitor (C3)
The PVDD bypass capacitor lowers the output imped-
ance of the power supply and reduces the impact of
the MAX9727’s charge-pump switching transients.
Bypass PVDD with C3 and place it physically close to
PVDD and PGND. C3 should be greater than or equal to
the value of C1.
Supply Bypassing
Proper power-supply bypassing ensures low-noise,
low-distortion performance. Connect a 1F ceramic
capacitor from VDD to PGND.
Layout and Grounding
Good PC board layout is essential for optimizing perfor-
mance. Use large traces for the power-supply inputs
and amplifier outputs to minimize losses due to trace
resistance. Good grounding improves audio perfor-
mance, minimizes crosstalk between channels, and
prevents any digital switching noise from coupling into
the audio signal. Route PGND and all traces that carry
switching transients away from traces and components
in the audio signal path.
Place the charge-pump capacitors (C1 and C2) as
close to the device as possible. Connect VSS and PVSS
together at capacitor C2.
Thermal-Overload Protection
Thermal-overload protection limits the total power dissi-
pation in the MAX9727. When the junction temperature
exceeds +160°C, the thermal protection circuitry dis-
ables the amplifier output stages. The junction temper-
ature must cool by 15°C before normal operation can
continue.
MAX9727
Quad Audio Line Driver with 3VRMS Output
______________________________________________________________________________________
11
Chip Information
PROCESS: BiCMOS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9727EEP+ | 功能描述:音頻放大器 Quad Audio Line Drvr w/3VRMS Output RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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 |
| MAX9727EEP+T | 功能描述:音頻放大器 Quad Audio Line Drvr w/3VRMS Output RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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 |
| MAX9728AETC+ | 功能描述:音頻放大器 60mW DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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 |
| MAX9728AETC+T | 功能描述:音頻放大器 60mW DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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 |
| MAX9728AETC+TG104 | 制造商:Maxim Integrated Products 功能描述: |
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