- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16875 > TPA6140A2YFFEVM (Texas Instruments)EVALUATION MODULE FOR TPA6140A2 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPA6140A2YFFEVM |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION MODULE FOR TPA6140A2 |
| 視頻文件： | TPA6140A2 Demonstration |
| 特色產(chǎn)品： | TPA6140A2 Class G DirectPath? Stereo Headphone Amplifier |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | DirectPath™ |
| 放大器類型： | G 類 |
| 輸出類型： | 耳機(jī)，2-通道（立體聲） |
| 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： | 32mW x 2 @ 32 歐姆 |
| 電源電壓： | 2.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | TPA6140A2 |
| 已供物品： | 板，CD |
| 產(chǎn)品目錄頁面： | 878 (CN2011-ZH PDF) |
| 配用： | WM2582-ND - EVALDI EARBUDS TYPE Y |
| 相關(guān)產(chǎn)品： | 296-24303-6-ND - IC AMP AUDIO 25MW STER 16DSBGA 296-24303-1-ND - IC AMP AUDIO 25MW STER 16DSBGA 296-24303-2-ND - IC AMP AUDIO 25MW STER 16DSBGA 296-24237-6-ND - IC AMP AUDIO 25MW STER 16DSBGA 296-24237-1-ND - IC AMP AUDIO 25MW STER 16DSBGA 296-24237-2-ND - IC AMP AUDIO 25MW STER 16DSBGA |
| 其它名稱： | 296-24299 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當(dāng)前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
C
IN
1
f
2 R C
=
p
IN
C
IN
1
C
2 f R
=
p
SLOS598A – MARCH 2009 – REVISED OCTOBER 2009................................................................................................................................................. www.ti.com
Use input coupling capacitors to ensure inaudible turn-on pop. Activate the TPA6140A2 after all audio sources
have been activated and their output voltages have settled. During power-down, deactivate the TPA6140A2
before deactivating the audio input source.
RF AND POWER SUPPLY NOISE IMMUNITY
The TPA6140A2 employs a new differential amplifier architecture to achieve high power supply noise rejection
and RF noise rejection. RF and power supply noise are common in modern electronics. Although RF frequencies
are much higher than the 20 kHz audio band, signal modulation often falls in-band. This, in turn, modulates the
supply voltage, allowing a coupling path into the audio amplifier. A common example is the 217 Hz GSM
frame-rate buzz often heard from an active speaker when a cell phone is placed nearby during a phone call.
The TPA6140A2 has excellent rejection of power supply and RF noise, preventing audio signal degradation.
INPUT COUPLING CAPACITORS
Input coupling capacitors block any dc bias from the audio source and ensure maximum dynamic range. Input
coupling capacitors also minimize TPA6140A2 turn-on pop to an inaudible level.
The input capacitors are in series with TPA6140A2 internal input resistors, creating a high-pass filter. Equation 8
calculates the high-pass filter corner frequency. The input impedance, RIN, is dependent on device gain. Larger
input capacitors decrease the corner frequency. See the Operating Characteristics table for input impedance
values.
(8)
For a given high-pass cutoff frequency, the minimum input coupling capacitor is found as:
(9)
Example: Design for a 20 Hz corner frequency with a TPA6140A2 gain of +6 dB. The Operating Characteristics
table gives RIN as 13.2 k. Equation 9 shows the input coupling capacitors must be at least 0.6 μF to achieve a
20 Hz high-pass corner frequency. Choose a 0.68
μF standard value capacitor for each TPA6140A2 input (X5R
material or better is required for best performance).
Input capacitors can be removed provided the TPA6140A2 inputs are driven differentially with less than ±1 VRMS
and the common-mode voltage is within the input common-mode range of the amplifier. Without input capacitors
turn-on pop performance may be degraded and should be evaluated in the system.
CHARGE PUMP FLYING CAPACITOR AND HPVSS CAPACITOR
The TPA6140A2 uses a built-in charge pump to generate a negative voltage supply for the headphone
amplifiers. The charge pump flying capacitor connects between CPP and CPN. It transfers charge to generate
the negative supply voltage. The HPVSS capacitor must be at least equal in value to the flying capacitor to allow
maximum charge transfer. Use low equivalent-series-resistance (ESR) ceramic capacitors (X5R material or
better is required for best performance) to maximize charge pump efficiency. Typical values are 1
μF to 2.2 μF
for the HPVSS and flying capacitors. Although values down to 0.47
μF can be used, total harmonic distortion
(THD) will increase.
18
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPA6140A2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6165BESA+T | IC VREF SERIES PREC 5V 8-SOIC |
| RCC19DRTN | CONN EDGECARD 38POS DIP .100 SLD |
| 202D185-4-60-0 | BOOT MOLDED |
| IDSS-17-D-18.00 | CABLE ASSEMBLY SOCKET 17 POSITIO |
| GCC31DCSD-S288 | CONN EDGECARD 62POS .100 EXTEND |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6140A2YFFR | 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| 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(fēng)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(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。