MAX4469 Datasheet

• +2.4V to +5.5V Supply Voltage Operation
• Excellent Power-Supply Rejection Ratio: 112dB
• Excellent Common-Mode Rejection Ratio: 126dB
• High A_VOL: 125dB (R_L = 100kΩ)
• Rail-to-Rail Outputs
• Low 24µA Quiescent Supply Current
• Gain Bandwidth Product:
  • 200kHz (MAX4469)
• Available in Space-Saving Packages
  • 8-Pin SOT23 (MAX4469)

• Cell Phones
• Digital Dictation Devices
• Headsets
• Hearing Aids
• Microphone Preamplifiers
• Portable Computing
• Voice-Recognition Systems

The 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 MAX4469 are unity-gain stable and deliver a 200kHz gain bandwidth from only 24µA of supply current. In addition these amplifiers feature rail-to-rail outputs, high A_VOL, plus excellent power-supply rejection and common-mode rejection ratios for operation in noisy environments.

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 dual MAX4469 are available in the space-saving 8-pin SOT23 package.