參數(shù)資料
型號： MAX9888EVKIT+
廠商： Maxim Integrated Products
文件頁數(shù)： 104/115頁
文件大小： 0K
描述： KIT EVALUATION FOR MAX9888
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
系列： DirectDrive®, FLEXSOUND™
相關(guān)產(chǎn)品： MAX9888EWY+T-ND - IC CODEC AUDIO FLEXSOUND 63WLP
Stereo Audio CODEC
with FlexSound Technology
MAX9888
89
Speaker Amplifiers
The IC integrates a stereo filterless Class D amplifier that
offers much higher efficiency than Class AB without the
typical disadvantages.
The high efficiency of a Class D amplifier is due to the
switching operation of the output stage transistors. In a
Class D amplifier, the output transistors act as current
steering switches and consume negligible additional
power. Any power loss associated with the Class D out-
put stage is mostly due to the I2R loss of the MOSFET
on-resistance, and quiescent current overhead.
The theoretical best efficiency of a linear amplifier is
78%, however, that efficiency is only exhibited at peak
output power. Under normal operating levels (typical
music reproduction levels), efficiency falls below 30%,
whereas the IC’s Class D amplifier still exhibits 80% effi-
ciency under the same conditions.
Traditional Class D amplifiers require the use of exter-
nal LC filters or shielding to meet EN55022B and FCC
electromagnetic-interference (EMI) regulation standards.
Maxim’s patented active emissions limiting edge-rate
control circuitry reduces EMI emissions (Figure 26).
Figure 26. EMI with 15cm of Speaker Cable
Figure 27. Speaker Amplifier Path Block Diagram
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-10
0
FREQUENCY (MHz)
AMPLITUDE
(dBV/m)
FREQUENCY (MHz)
AMPLITUDE
(dBV/m)
PGAOUT2:
0dB TO -23dB
PGAOUT3:
0dB TO -23dB
PREOUT2
PREOUT3
+9dB
DALEN
DACL
DAREN
DACR
SPKLP
SPKLN
MIXSPL
+6dB
SPVOLL:
+8dB TO -62dB
SPKLVDD
SPKLGND
SPKRVDD
SPKRP
SPKRN
SPLEN
SPREN
POWER/DISTORTION LIMITER
MIXSPR
+6dB
SPVOLR:
+8dB TO -62dB
SPKRPGND
MIX
BATTERY ADC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9888EVKIT+ 功能描述:音頻 IC 開發(fā)工具 MAX9888 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
MAX9888EWY+T 功能描述:接口—CODEC Stereo Audio CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX9889EWO+T 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX988ESA 功能描述:校驗器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX988ESA+ 功能描述:校驗器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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