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MAX9814ETD
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MAX9814ETD

  • 所属类别：多路模拟开关
  • 产品名称：麦克风放大器，带有AGC和低噪声麦克风偏置
  • 厂商：MAXIM
  • 生产批号：12+
  • 封装：SOP
  • 库存状态：有库存
  • 库存量：2070
  • 最低订购量：1
  • 详细资料：点击查找MAX9814ETD的pdf资料
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  • Product Introduction

MAX9814ETD

Microphone amplifier with AGC and low-noise microphone bias

description

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 front fixes 12 dB gain, while the VGA gain adjusts from 20dB to 0dB auto-adjusted based on output voltage and AGC threshold. The output amplifier offers selectable gain of 8 dB, 18 dB, and 28 dB. Uncompressed, cascading amplifiers at 40dB at 50dB, or 60dB total gain. Gain of a trilevel digital input/output amplifier. An external resistor divider controls the AGC threshold and capacitance scheme for a single attack/release time. A trilevel digital input program is the ratio of the attack release time. The AGC hold time at 30 ms is fixed. Low-noise microphone bias voltage generator biases most electret microphones.

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

Key features:

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

Applications/Uses:

  • Bluetooth ® headsets
     
  • Digital camera
     
  • Digital video camera
     
  • Entertainment systems (e.g. karaoke)
     
  • High-quality portable voice recorder
     
  • IP Phone/Conference Call
     
  • handheld computer
     
  • Two communicators

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MAX9814ETD MAXIM 12+ SOP Microphone amplifier with AGC and low-noise microphone bias

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