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參數(shù)資料
| 型號： | MAX9724BETC+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO .045W STER 12TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | DirectDrive® |
| 類型： | AB 類 |
| 輸出類型： | 耳機(jī)，2-通道（立體聲） |
| 在某負(fù)載時最大輸出功率 x 通道數(shù)量： | 63mW x 2 @ 32 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點(diǎn)： | 消除爆音，短路保護(hù)和熱保護(hù)，關(guān)閉 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 12-TQFN EP（3x3） |
| 封裝/外殼： | 12-WQFN 裸露焊盤 |
| 包裝： | 帶卷 (TR) |
| 配用： | MAX9724AEVKIT+-ND - EVALUATION KIT FOR MAX9724A/B MAX9724DEVKIT+-ND - KIT EVAL FOR MAX9724D |
MAX9724A/MAX9724B
60mW, DirectDrive, Stereo Headphone Amplifier
with Low RF Susceptibility and Shutdown
______________________________________________________________________________________
13
Lineout Amplifier and Filter Block
The MAX9724A can be used as an audio line driver
capable of providing 2VRMS into 10kΩ loads with a sin-
gle 5V supply (see Figure 4 for the RMS Output Voltage
vs. Supply Voltage plot). 2VRMS is a popular audio line
level, first used in CD players, but now common in DVD
and set-top box (STB) interfacing standards. A 2VRMS
sinusoidal signal equates to approximately 5.7VP-P,
which means that the audio system designer cannot
simply run the lineout stage from a (typically common)
5V supply—the resulting output swing would be inade-
quate. A common solution to this problem is to use op
amps driven from split supplies (±5V typically), or to
use a high-voltage supply rail (9V to 12V). This can
mean adding extra cost and complexity to the system
power supply to meet this output level requirement.
Having the ability to derive 2VRMS from a 5V supply, or
even 3.3V supply, can often simplify power-supply
design in some systems.
When the MAX9724A is used as a line driver to provide
outputs that feed stereo equipment (receivers, STBs,
notebooks, and desktops) with a digital-to-analog con-
verter (DAC) used as an audio input source, it is often
desirable to eliminate any high-frequency quantization
noise produced by the DAC output before it reaches
the load. This high-frequency noise can cause the input
stages of the line-in equipment to exceed slew-rate lim-
itations or create excessive EMI emissions on the
cables between devices.
LEFT
AUDIO
INPUT
RIGHT
AUDIO
INPUT
OUTL
INL
INR
OUTR
MAX9724A
7.5k
Ω
7.5k
Ω
7.5k
Ω
7.5k
Ω
15k
Ω
10k
Ω
10k
Ω
15k
Ω
1.2nF
220pF
LINE IN DEVICE
STEREO
DAC
1
μF
1
μF
Figure 5. MAX9724A Line Out Amplifier and Filter Block Configuration
RMS OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
RMS
OUTPUT
VOLTAGE
(V)
5.0
4.5
4.0
3.5
3.0
2.0
2.5
3.0
3.5
1.5
2.5
5.5
RL = 10k
Ω
1% THD+N
fIN = 1kHz
RL = 1k
Ω
1% THD+N
LIMITED BY
ABS. MAXIMUM
RATINGS
Figure 4. RMS Output Voltage vs. Supply Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9724BEUD | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX9724BEUD+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.063W CLS-AB 14TSSOP - Rail/Tube |
| MAX9724BEUD+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.063W CLS-AB 14TSSOP - Tape and Reel |
| MAX9724BEUD-T | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| MAX9724CEBC+T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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