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
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[ CXAR41189 ]"
目录
7.相关产品
产品概述 返回TOP
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
• 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 VDD = 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
Notebook PCs
Cellular Phones
PDAs
MP3 Players
Smart Phones
Portable Audio Equipment
技术规格书（产品PDF) 返回TOP
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
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 |
||||||||
|
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 |
||
