具有数字音量控制和停机模式的 LM4811 双路 105mW 耳机放大器

The LM4811 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16Ω load with 0.1% (THD+N) from a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4811 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.

The LM4811 features a digital volume control that sets the amplifier's gain from +12dB to −33dB in 16 discrete steps using a two−wire interface.

The unity-gain stable LM4811 also features an externally controlled, active-high, micropower consumption shutdown mode. It also has an internal thermal shutdown protection mechanism.

产品特性
  • Digital Volume Control Range from +12dB to −33dB
  • WSON and VSSOP Surface Mount Packaging
  • "Click and Pop" Suppression Circuitry
  • No Bootstrap Capacitors Required
  • Low Shutdown Current
Key Specifications
  • THD+N at 1kHz, 105mW Continuous Average Output Power into 16Ω 0.1 % (typ)
  • THD+N at 1kHz, 70mW Continuous  Average Power into 32Ω 0.1 % (typ)
  • Shutdown Current 0.3 μA (typ)
参数parametrics
参数LM4811
Output Power (W)0.105
PSRR (dB)60
RatingCatalog
Operating Temperature Range (C)-40 to 85
Approx. Price (US$)0.38 | 1ku
Headphone ChannelsStereo
Volume ControlYes
Shutdown Current (ISD) (uA)0.3
数据表 (1)
标题类型大小 (KB)日期
LM4811 Dual 105mW Headphone Amp w/Dig Vol Control & Shutdown ModePDF16082013年 4月 5日
应用手册 (2)
标题类型大小 (KB)日期
AN-1849 An Audio Amplifier Power Supply DesignPDF18582013年 5月 1日
Guidelines for Measuring Audio Power Amplifier PerformancePDF7652001年 10月 30日
订购型号
型号试生产 / 生产材料状态温度(oC)价格(美元) | Quantity封装 | 引脚器件标记封装数量 | 载体
LM4811MM/NOPB生产ACTIVE-40 to 850.38 | 1kuVSSOP (DGS)G111000 | LARGE T&R
LM4811MMX/NOPB生产ACTIVE-40 to 850.38 | 1kuVSSOP (DGS)G113500 | LARGE T&R
LM4811 Dual 105mW Headphone Amp w/Dig Vol Control & Shutdown Mode LM4811
AN-1849 An Audio Amplifier Power Supply Design TLV320DAC3100-Q1
Guidelines for Measuring Audio Power Amplifier Performance TLV320DAC3100-Q1
LM4811