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参数资料
| 型号： | MAX97002EWP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 27/37页 |
| 文件大小： | 0K |
| 描述： | IC AUDIO SUBSYSTEM 20WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | DirectDrive® |
| 类型： | D 类 |
| 输出类型： | 1-通道（单声道），带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 920mW x 1 @ 8 欧姆; 37mW x 2 @ 16 欧姆 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，I²C，静音，关闭，音量控制 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 20-WLP |
| 封装/外壳： | 20-WFBGA，WLBGA |
| 包装： | 标准包装 |
| 其它名称： | MAX97002EWP+TDKR |
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Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifiers
MAX97002
33
Figure 12. Reading One Byte of Data from the MAX97002
Figure 13. Reading n-Bytes of Data from the MAX97002
Applications Information
Filterless Class D Operation
Traditional Class D amplifiers require an output filter to
recover the audio signal from the amplifier’s output. The
filters add cost, increase the solution size of the amplifier,
and can decrease efficiency and THD+N performance.
The traditional PWM scheme uses large differential out-
put swings (2 x VDD(P-P)) and causes large ripple cur-
rents. Any parasitic resistance in the filter components
results in a loss of power, lowering the efficiency.
The MAX97002 does not require an output filter. The
device relies on the inherent inductance of the speaker
coil and the natural filtering of both the speaker and
the human ear to recover the audio component of the
square-wave output. Eliminating the output filter results
in a smaller, less costly, more efficient solution.
Because the frequency of the MAX97002 output is well
beyond the bandwidth of most speakers, voice coil
movement due to the square-wave frequency is very
small. Although this movement is small, a speaker not
designed to handle the additional power can be dam-
aged. For optimum results, use a speaker with a series
inductance > 10FH. Typical 8I speakers exhibit series
inductances in the 20FH to 100FH range.
RF Susceptibility
GSM radios transmit using time-division multiple access
(TDMA) with 217Hz intervals. The result is an RF signal
with strong amplitude modulation at 217Hz and its har-
monics that are easily demodulated by audio amplifiers.
The MAX97002 is designed specifically to reject RF
signals; however, PCB layout has a large impact on the
susceptibility of the end product.
In RF applications, improvements to both layout and
component selection decreases the MAX97002’s sus-
ceptibility to RF noise and prevent RF signals from being
demodulated into audible noise. Trace lengths should
be kept below 1/4 of the wavelength of the RF frequency
of interest. Minimizing the trace lengths prevents them
from functioning as antennas and coupling RF signals
into the MAX97002. The wavelength (
l) in meters is
given by:
l = c/f
where c = 3 x 108 m/s, and f = the RF frequency of
interest.
Route the audio signals on the middle layers of the PCB
to allow the ground planes above and below to shield
them from RF interference. Ideally, the top and bottom
layers of the PCB should primarily be ground planes to
create effective shielding.
ACKNOWLEDGE FROM MAX97002
1 BYTE
AUTOINCREMENT INTERNAL
REGISTER ADDRESS POINTER
ACKNOWLEDGE FROM MAX97002
NOT ACKNOWLEDGE FROM MASTER
A
P
A
0
ACKNOWLEDGE FROM MAX97002
R/W
S
R/W
REPEATED START
Sr
1
SLAVE ADDRESS
REGISTER ADDRESS
SLAVE ADDRESS
DATA BYTE
ACKNOWLEDGE FROM MAX97002
1 BYTE
AUTOINCREMENT INTERNAL
REGISTER ADDRESS POINTER
ACKNOWLEDGE FROM MAX97002
A
A P
0
ACKNOWLEDGE FROM MAX97002
R/W
S
R/W
REPEATED START
Sr
1
SLAVE ADDRESS
REGISTER ADDRESS
SLAVE ADDRESS
DATA BYTE
相关PDF资料 |
PDF描述 |
|---|---|
| MAX97003EWP+T | IC AUDIO SUBSYSTEM LN 20WLP |
| MAX9700AEUB+ | IC AMP AUDIO 1.6W MONO D 10MSOP |
| MAX9701ETG+T | IC AMP AUDIO PWR 2.2W D 24TQFN |
| MAX9702ETI+T | IC AMP AUDIO PWR 1.8W D 28TQFN |
| MAX9704ETJ+ | IC AMP AUDIO PWR 16W STER 32TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX97003EVKIT# | 功能描述:音频 IC 开发工具 MAX97003 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| MAX97003EWP+ | 制造商:Maxim Integrated Products 功能描述:AUDIO SUBSYSTEM - Rail/Tube |
| MAX97003EWP+T | 功能描述:音频放大器 Audio Subsystem RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9700AEBC | 制造商:Maxim Integrated Products 功能描述:1.2W LOW EMI FILTERLESS CLASS D - Rail/Tube |
| MAX9700AEBC+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 1.6W CLS-D 12UCSP - Rail/Tube |
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