CXAR41189在32Ω负载下每通道输出高达88mW THD+N低0.034% 217Hz时的-70dB电源抑制比PSRR设备在无额外线性调节器的情况下从噪声数字电源运行增益可以通过外部反馈电阻器进行调整立体声耳机放大器

CXAR41189立体声耳机放大器是专为便携式设备设计的，在这些设备上，板空间非常优越。CXAR41189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CXAR41189B，增益在内部设置（-1.5V/V），进一步减少了组件计数。对于CXAR41189A，增益可以通过外部反馈电阻器进行调整。
CXAR41189在32Ω负载下每通道输出高达88mW，THD+N低0.034%。217Hz时的-70dB电源抑制比（PSRR）允许该设备在无额外线性调节器的情况下从噪声数字电源运行。全面的点击和弹出电路抑制声音点击和弹出启动和关闭。
CXAR41189从单个2.7V到5.5V电源工作，仅消耗2.7mA电源电流，具有短路和热过载保护，并在扩展的-40℃到+85℃温度范围内指定。CXAR41189提供绿色TQFN-3×3-12L包装。
•CXAR41189A：外部反馈增益网络
CXAR41189B：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
•88mW输入32Ω负载，从5V电源
THD+N=0.1%（典型，每个通道）
•低0.034%THD+N
•高PSRR（217Hz时为-70dB）
•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2.7毫安）
•关闭控制
•短路和热过载保护
•欠压锁定功能

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXAR41189 stereo headphone amplifier is designed for portable equipment where board space is at a premium. The CXAR41189 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 CXAR41189B, the gain is set internally (-1.5V/V), further reducing component count. For CXAR41189A, the gain can be adjusted by external feedback resistors.

The CXAR41189 delivers up to 88mW per channel into a 32Ω load and has low 0.034% THD+N. A -70dB 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.

The CXAR41189 operates from a single 2.7V to 5.5V supply, consumes only 2.7mA supply current, has short-circuit and thermal-overload protections, and is specified over the extended -40℃ to +85℃ temperature range. The CXAR41189 is available in a Green TQFN-3×3-12L package.

   产品特点 返回TOP

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• CXAR41189A: External Feedback Gain Network
    CXAR41189B: 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
• 88mW into 32Ω Load from 5V Power Supply at
    THD+N = 0.1% (TYP, per Channel)
• Low 0.034% THD+N
• High PSRR (-70dB at 217Hz)
• Integrated Click-and-Pop Suppression
• 2.7V to 5.5V Single Supply Operation
• Low Quiescent Current (2.7mA at V_DD = 5V)
• Shutdown Control
• Short-Circuit and Thermal-Overload Protections
• Undervoltage Lockout Function
• -40℃ to +85℃ Operating Temperature Range
• Available in Green TQFN-3×3-12L Package

   应用范围 返回TOP

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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

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电路原理图 返回TOP

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耳机驱动器
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
CXAR41184	Stereo	L	2.5	5.5	N	158	87	MSOP-8
CXAR41185	Stereo	H	2.5	5.5	N	158	87	MSOP-8
CXAR41186	Stereo	H	2.7	5.5	Y	132	82	MSOP-10
CXAR41187	Stereo	L	2.7	5.5	N		95	TQFN-4x4-20L
CXAR41188	Stereo	L	2.5	5.5	N	145	85	TDFN-2x2-8L
CXAR41189	Stereo	L	2.7	5.5	N		88	TQFN-3x3-12L
CXAR41190	Stereo	L	2.7	5.5	Y		80	TQFN-3x3-16L
CXAR41191	Stereo	L	2.7	5.1	N		80	TDFN-3x3-10L