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參數(shù)資料
| 型號(hào)： | MAX9702B |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1.8W, Filterless, Stereo, Class D Audio Power Amplifier and DirectDrive Stereo Headphone Amplifier |
| 中文描述： | 1.8W的，濾波，立體聲D類音頻功率放大器和DirectDrive立體聲耳機(jī)放大器 |
| 文件頁數(shù)： | 25/32頁 |
| 文件大?。?/td> | 1411K |
| 代理商： | MAX9702B |
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Other considerations when designing the input filter
include the constraints of the overall system and the
actual frequency band of interest. Although high-fidelity
audio calls for a flat-gain response between 20Hz and
20kHz, portable voice-reproduction devices such as
cellular phones and two-way radios need only concen-
trate on the frequency range of the spoken human voice
(typically 300Hz to 3.5kHz). In addition, speakers used
in portable devices typically have a poor response
below 300Hz. Taking these two factors into considera-
tion, the input filter may not need to be designed for a
20Hz to 20kHz response, saving both board space and
cost due to the use of smaller capacitors.
Output Filter
The MAX9702 does not require an output filter. The
device passes FCC emissions standards with 75mm of
unshielded speaker cables. However, output filtering
can be used if a design is failing radiated emissions
due to board layout or cable length, or the circuit is
near EMI-sensitive devices. Use a ferrite bead filter
when radiated frequencies above 10MHz are of con-
cern. Use an LC filter when radiated frequencies below
10MHz are of concern, or when long leads (>200mm)
connect the amplifier to the speaker. Figure 13 shows
optional speaker amplifier output filters.
M
1.8W, Filterless, Stereo, Class D Audio Power
Amplifier and DirectDrive Stereo Headphone Amplifier
______________________________________________________________________________________
25
MAX9702
OUTL+
OUTL-
OUTR+
OUTR-
MAX9702
OUTL+
OUTL-
OUTR+
OUTR-
MAX9702
OUTL+
OUTL-
OUTR+
OUTR-
(a)
TYPICAL APPLICATION
<75mm OF SPEAKER CABLE.
(b)
COMMON-MODE CHOKE FOR
APPLICATIONS USING CABLE LENGTHS
GREATER THAN
75mm.
(c)
LC FILTER WHEN USING CABLE
LENGTHS LONGER THAN
200mm
IN APPLICATIONS THAT ARE
SENSITIVE TO EMI BELOW 10MHz.
100pF
800
AT 100MHz
800
AT 100MHz
100pF
100pF
100pF
22
0.068
μ
F
0.068
μ
F
0.033
μ
F
0.033
μ
F
0.033
μ
F
0.068
μ
F
15
μ
H
15
μ
H
15
μ
H
15
μ
H
22
22
22
0.15
μ
F
0.068
μ
F
0.033
μ
F
0.15
μ
F
Figure 13. Optional Speaker Amplifier Output Filter
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX9703 | Hex 2-Input OR Drivers 20-CDIP -55 to 125 |
| MAX9703-MAX9704 | 15W, Filterless, Spread-Spectrum Mono/Stereo Class D Amplifiers |
| MAX9703ETJ | 15W, Filterless, Spread-Spectrum Mono/Stereo Class D Amplifiers |
| MAX9704ETJ | 15W, Filterless, Spread-Spectrum Mono/Stereo Class D Amplifiers |
| MAX9711ETC | Synchronous 8-Bit Up/Down Counters 28-LCCC -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9702BETI+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH/SPKR 2CH STEREO 1.8W/0.045W CLS-AB/CLS-D 28TQFN - Rail/Tube |
| MAX9702BETI+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH/SPKR 2CH STEREO 1.8W/0.045W CLS-AB/CLS-D 28TQFN - Tape and Reel |
| MAX9702BEUI+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH/SPKR 2CH STEREO 1.8W/0.045W CLS-AB/CLS-D 28TSSO - Rail/Tube |
| MAX9702BEUI+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH/SPKR 2CH STEREO 1.8W/0.045W CLS-AB/CLS-D 28TSSO - Tape and Reel |
| MAX9702ETI+ | 功能描述:音頻放大器 1.8W Filterless Class D Audio 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 |
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