To suppress this noise, and to provide a 2VRMS stan- dard audio output level fro" />
參數(shù)資料
型號(hào)： MAX9724CETC+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 6/19頁(yè)
文件大小： 0K
描述： IC AMP AUDIO .063W 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(shí)最大輸出功率 x 通道數(shù)量： 63mW x 2 @ 32 歐姆
電源電壓： 2.5 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
To suppress this noise, and to provide a 2VRMS stan-
dard audio output level from a single 5V supply, the
MAX9724C can be configured as a line driver and
active lowpass filter. Figure 5 shows the MAX9724C
connected as 2-pole Rauch/multiple feedback filter with
a passband gain of 6dB and a -3dB (below passband)
cutoff frequency of approximately 27kHz (see Figure 6
for the Gain vs. Frequency plot).
Layout and Grounding
Proper layout and grounding are essential for optimum
performance. Connect PGND and SGND together at a
single point on the PCB. Connect PVSS to SVSS and
bypass with a 1F capacitor. Place the power-supply
bypass capacitor and the charge-pump hold capacitor
as close to the MAX9724 as possible. Route PGND and
all traces that carry switching transients away from
SGND and the audio signal path. The thin QFN pack-
age features an exposed pad that improves thermal
efficiency. Ensure that the exposed pad is electrical-
ly isolated from PGND, SGND, and VDD. Connect the
exposed paddle to SVSS only when the board lay-
out dictates that the exposed pad cannot be left
floating.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliability
testing results, refer to the Application Note
UCSP—A
Wafer-Level Chip-Scale Package available on Maxim’s
website at www.maxim-ic.com/ucsp.
MAX9724C/MAX9724D
Low RF Susceptibility DirectDrive Stereo Head-
phone Amplifier with 1.8V Compatible Shutdown
14
______________________________________________________________________________________
MAX9724C ACTIVE FILTER GAIN
vs. FREQUENCY
FREQUENCY (Hz)
GAIN
(dB)
100k
10k
-30
-25
-20
-15
-10
-5
0
5
10
-35
1k
1M
RL = 10k
Ω
Figure 6. Frequency Response of Active Filter of Figure 4
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9724CEVKIT+ 制造商:Maxim Integrated Products 功能描述:LOW RF SUSCEPTIBILITY DIRECTDRIVE S - Boxed Product (Development Kits)
MAX9724DEBC+T 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX9724DEBC+TG45 功能描述:音頻放大器 Low RF Susceptible Headphone Amplifier 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
MAX9724DETC+ 功能描述:音頻放大器 Low RF Susceptible Headphone Amplifier 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
MAX9724DETC+T 功能描述:音頻放大器 Low RF Susceptible Headphone Amplifier 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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