参数资料
型号: MAX9888EVKIT+
厂商: Maxim Integrated Products
文件页数: 104/115页
文件大小: 0K
描述: KIT EVALUATION FOR MAX9888
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
系列: DirectDrive®, FLEXSOUND™
相关产品: 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
300
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10
-10
0
40
30
20
10
-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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相关代理商/技术参数
参数描述
MAX9888EVKIT+ 功能描述:音频 IC 开发工具 MAX9888 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
MAX9888EWY+T 功能描述:接口—CODEC Stereo Audio CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel
MAX9889EWO+T 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel
MAX988ESA 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压(最大值):6 mV 电源电流(最大值):1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel
MAX988ESA+ 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压(最大值):6 mV 电源电流(最大值):1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel