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MAX9814ETD
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MAX9814ETD

  • Category:Multi-channel analog switches
  • Product Name:Microphone amplifier with AGC and low noise microphone bias
  • Manufacturers:MAXIM
  • Production Batch Number:12+
  • Encapsulation:SOP
  • Stock Status:There is stock
  • Stock Quantity:2070
  • Minimum order quantity: 1
  • Details:Click here to find PDF information on the MAX9814ETD
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  • Product introduction

MAX9814ETD

Microphone amplifier with AGC and low noise microphone bias

description

The MAX9814 is a low-cost, high-quality microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. The device features a low noise preamplifier, variable gain amplifier (VGA), output amplifier, microphone bias voltage generator, and AGC control circuitry.

The low noise prefix 12dB gain, while the VGA gain is automatically adjusted from 20dB to 0dB, depending on the output voltage and AGC threshold. The output amplifier offers selectable gains of 8 dB, 18 dB, 28 dB. Uncompressed, the amplifier cascades at 40dB for 50dB, or 60dB for total gain. The gain of a trilevel digital input-output amplifier. An external resistor divider controls the AGC threshold and capacitance scheme single attack/release time. A trilevel number enters the proportion of the attack release time of the program. The AGC hold time at 30 ms is fixed. Low noise microphone bias voltage generator biases most electret microphones.

The MAX9814 is available in a space-saving 14-pin TDFN package. The device is specified over the extended temperature range of -40°C to +85°C.

Key features

  • Automatic Gain Control (AGC)
  • Three gain settings (40 dB, 50 dB, 60 dB)
  • Programmable onset time
  • Programmable attack and release rates
  • 2.7V to 5.5V supply voltage range
  • Low Input Referred Noise 30nV Density/
  • Low total harmonic distortion: 0.04% typical
  • Low-power shutdown mode
  • Internal low noise microphone biased, 2V
  • Available in a space-saving 14-pin TDFN in a 3mm x 3mm package
  • -40°C to +85°C extended temperature range

Application/Purpose

  • Bluetooth ® headset
     
  • Digital cameras
     
  • Digital video camera
     
  • Entertainment systems (e.g. karaoke)
     
  • High quality portable audio recorder
     
  • IP telephony/conference calls
     
  • Pocket PC
     
  • Two-way communicator

andMAX9814ETDRelated ICs are:


Model Manufacturers lot number encapsulation illustrate
MAX9814ETD MAXIM 12+ SOP Microphone amplifier with AGC and low noise microphone bias

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