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 |
||
