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參數(shù)資料
| 型號： | TPA6140A2YFFR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA16 |
| 封裝： | 1.6 X 1.6 MM, 0.4 MM PITCH, GREEN, DSBGA-16 |
| 文件頁數(shù)： | 9/30頁 |
| 文件大小： | 705K |
| 代理商： | TPA6140A2YFFR |
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CO
Conventional
VOUT
GND
VOUT
GND
VBIAS
Capless
DirectPath
GND
VDD
VSS
VOUT
CO
VOUT
www.ti.com................................................................................................................................................. SLOS598A – MARCH 2009 – REVISED OCTOBER 2009
Two different headphone amplifier architectures are available to eliminate the need for dc-blocking capacitors.
The Capless amplifier architecture provides a reference voltage to the headphone connector shield pin as shown
in the middle drawing of Figure 31. The audio output signals are centered around this reference voltage, which is
typically half of the supply voltage to allow symmetrical output voltage swing.
When using a Capless amplifier do not connect the headphone jack shield to any ground reference or large
currents will result. This makes Capless amplifiers ineffective for plugging non-headphone accessories into the
headphone connector. Capless amplifiers are useful only with floating GND headphones.
Figure 31. Amplifier Applications
The DirectPath amplifier architecture operates from a single supply voltage and uses an internal charge pump
to generate a negative supply rail for the headphone amplifier. The output voltages are centered around 0 V and
are capable of positive and negative voltage swings as shown in the bottom drawing of Figure 31. DirectPath
amplifiers require no output dc-blocking capacitors. The headphone connector shield pin connects to ground and
will interface with headphones and non-headphone accessories. The TPA6140A2 is a DirectPath amplifier.
ELIMINATING TURN-ON POP AND POWER SUPPLY SEQUENCING
The TPA6140A2 has excellent noise and turn-on / turn-off pop performance. It uses an integrated click-and-pop
suppression circuit to allow fast start-up and shutdown without generating any voltage transients at the output
pins. Typical start-up time from shutdown is 5 ms.
DirectPath technology keeps the output dc voltage at 0 V even when the amplifier is powered up. The DirectPath
technology together with the active pop-and-click suppression circuit eliminates audible transients during start up
and shutdown.
Copyright 2009, Texas Instruments Incorporated
17
Product Folder Link(s): TPA6140A2
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6140A2YFFT | 功能描述:音頻放大器 25mW Class-G Direct Path St Headph Amp 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 |
| TPA6140A2YFFT | 制造商:Texas Instruments 功能描述:Audio Power Amplifier IC |
| TPA6141A2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CLASS-G DIRECTPATH? STEREO HEADPHONE AMPLIFIER |
| TPA6141A2YFFEVM | 功能描述:音頻 IC 開發(fā)工具 TPA6141A2YFF Eval Mod 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 |
| TPA6141A2YFFR | 功能描述:音頻放大器 25mW Class-G Direct Path St Headph Amp 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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