CXAR41187立体声耳机放大器是专为便携式设备设计的，在那里板空间是一个溢价。CXAR41187使用无盖架构从单个电源产生地面参考输出，消除了输出对大型直流阻塞电容器的需求，节省了成本、板空间和组件高度。此外，对于CXAR41187B和CXAR41187C，增益在内部设置（-2V/V或-1.5V/V），进一步减少了组件计数。对于CXAR41187A，增益可以通过外部反馈电阻进行调整。
CXAR41187在32Ω负载下每通道可输出高达95mW的功率，具有低0.01%的THD+N.a-90dB的电源抑制比（PSRR），在217Hz时，允许该设备在无需额外线性调节器的噪声数字电源下运行。全面的点击和弹出电路抑制声音点击和弹出启动和关闭。独立的左/右、低功耗关机控制使在混合模式、单声道/立体声应用中优化节能成为可能。
CXAR41187从单个2.7V到5.5V电源工作，仅消耗5.6mA电源电流，具有短路和热过载保护，并在-40℃到+85℃的扩展温度范围内指定。CXAR41187提供绿色TQFN-4×4-20L包装。
•CXAR41187A：外部反馈增益网络
CXAR41187B：固定-2V/V增益
CXAR41187C：固定-1.5V/V增益
•无需大容量直流闭锁电容器
•接地参考输出消除直流偏压
耳机接地引脚上的电压
•低频响应不会因
输出电容器
•95兆瓦输入32Ω负载，从5伏电源
THD+N=0.1%（典型，每个通道）
•低0.01%THD+N
•高PSRR（217Hz时为-90dB）
•集成点击和弹出抑制
•2.7V至5.5V单电源操作
•低静态电流（VDD=5V时为5.6mA）
•左/右独立，低功耗
关闭控制
•短路和热过载保护
•欠压锁定功能
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[ CXAR41187 ]
目录
7.相关产品
产品概述 返回TOP
The CXAR41187 stereo headphone amplifier is designed for portable equipment where board space is at a premium. The CXAR41187 uses capless architecture to produce a ground-referenced output from a single power supply, eliminating the need for large DC-blocking capacitors for output, saving cost, board space, and component height. Additionally, for CXAR41187B and CXAR41187C, the gain is set internally (-2V/V or -1.5V/V), further reducing component count. For CXAR41187A, the gain can be adjusted by external feedback resistors.
The CXAR41187 delivers up to 95mW per channel into a 32Ω load and has low 0.01% THD+N. A -90dB power supply rejection ratio (PSRR) at 217Hz allows this device to operate from noisy digital supplies without an additional linear regulator. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. Independent left/right, low-power shutdown controls make it possible to optimize power savings in mixed-mode, mono/stereo applications.
The CXAR41187 operates from a single 2.7V to 5.5V supply, consumes only 5.6mA supply current, has short-circuit and thermal-overload protections, and is specified over the extended -40℃ to +85℃ temperature range. The CXAR41187 is available in a Green TQFN-4×4-20L package.
产品特点 返回TOP
• CXAR41187A: External Feedback Gain Network
CXAR41187B: Fixed -2V/V Gain
CXAR41187C: Fixed -1.5V/V Gain
• No Bulky DC-Blocking Capacitors Required
• Ground-Referenced Outputs Eliminate DC-Bias
Voltage on Headphone Ground Pin
• No Degradation of Low-Frequency Response Due
to Output Capacitors
• 95mW into 32Ω Load from 5V Power Supply at
THD+N = 0.1% (TYP, per Channel)
• Low 0.01% THD+N
• High PSRR (-90dB at 217Hz)
• Integrated Click-and-Pop Suppression
• 2.7V to 5.5V Single Supply Operation
• Low Quiescent Current (5.6mA at VDD = 5V)
• Independent Left/Right, Low-Power
Shutdown Controls
• Short-Circuit and Thermal-Overload Protections
• Undervoltage Lockout Function
• -40℃ to +85℃ Operating Temperature Range
• Available in Green TQFN-4×4-20L Package
应用范围 返回TOP
Notebook PCs
Cellular Phones
PDAs
MP3 Players
Smart Phones
Portable Audio Equipment
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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耳机驱动器 |
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|
Part Number |
CH |
SHDN |
VCC(Min) (V) |
VCC(Max)(V) |
Differential Input |
Output Power/CH @RL=16Ω(mW) |
Output Power/CH @RL=32Ω(mW) |
Package |
|
Stereo |
L |
2.5 |
5.5 |
N |
158 |
87 |
MSOP-8 |
|
|
Stereo |
H |
2.5 |
5.5 |
N |
158 |
87 |
MSOP-8 |
|
|
Stereo |
H |
2.7 |
5.5 |
Y |
132 |
82 |
MSOP-10 |
|
|
Stereo |
L |
2.7 |
5.5 |
N |
95 |
TQFN-4x4-20L |
||
|
Stereo |
L |
2.5 |
5.5 |
N |
145 |
85 |
TDFN-2x2-8L |
|
|
Stereo |
L |
2.7 |
5.5 |
N |
88 |
TQFN-3x3-12L |
||
|
Stereo |
L |
2.7 |
5.5 |
Y |
80 |
TQFN-3x3-16L |
||
|
Stereo |
L |
2.7 |
5.1 |
N |
80 |
TDFN-3x3-10L |
||
下一篇▶:CXAR41188双音频功率放大器从5.0V电源驱动16Ω扬声器时小于0.1%的失真THD连续平均功率为每个通道提供145mW外部控制低功耗低功耗的主动关机模式内部热关机保护机制主动低停机模式
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