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MAX4469：低成本、微功耗、SC70/SOT23-8封装、麦克风前置放大器，可完全关断

The MAX4465–MAX4469 are micropower op amps optimized for use as microphone preamplifiers. They provide the ideal combination of an optimized gain bandwidth product vs. supply current, and low-voltage operation in an ultra-small package. The MAX4465/MAX4467/MAX4469 are unity-gain stable and deliver a 200kHz gain bandwidth from only 24µA of supply current. The MAX4466/MAX4468 are decompensated for a minimum stable gain of +5V/V and provide a 600kHz gain bandwidth product. In addition these amplifiers feature rail-to-rail outputs, high AVOL, plus excellent power-supply rejection and common-mode rejection ratios for operation in noisy environments. The MAX4467/MAX4468 include a complete shutdown mode. In shutdown, the amplifiers' supply current is reduced to 5nA and the bias current to the external microphone is cut off for ultimate power savings. The single MAX4465/MAX4466 are offered in the ultra-small 5-pin SC70 package, while the single with shutdown MAX4467/MAX4468 and dual MAX4469 are available in the space-saving 8-pin SOT23 package.

关键特性 +2.4V to +5.5V Supply Voltage Operation Versions with 5nA Complete Shutdown Available (MAX4467/MAX4468) Excellent Power-Supply Rejection Ratio: 112dB Excellent Common-Mode Rejection Ratio: 126dB High AVOL: 125dB (RL = 100kΩ) Rail-to-Rail Outputs Low 24µA Quiescent Supply Current Gain Bandwidth Product: 200kHz (MAX4465/MAX4467/MAX4469) 600kHz AV ≥ 5 (MAX4466/MAX4468) Available in Space-Saving Packages 5-Pin SC70 (MAX4465/MAX4466) 8-Pin SOT23 (MAX4467/MAX4468/MAX4469)

功能框图 产品应用 蜂窝电话 数字复读装置 耳机 助听器 麦克风前置放大器 便携式计算机 语音识别系统

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