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SGM4825

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Single/Dual-Input, Fixed-Gain Microphone Amplifier with Integrated Bias

fileSGM4822_SGM4823_SGM4825_SGM4826.pdf
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The SGM4822/SGM4825 (single-input) and SGM4823/SGM4826 (dual-input) are low noise, low power, rail-to-rail, fixed-gain microphone amplifiers with integrated bias. The SGM4822/SGM4823 support power supply voltage from 3.3V to 5.5V and the SGM4825/SGM4826 support wide power supply voltage from 2.7V to 5.5V. The devices are suitable for portable audio applications. They feature low THD+N = 0.009% in active mode, 2.6MHz bandwidth and forced shutdown mode.

The SGM4822/SGM4823 power-saving features include automatic switching between low power monitor mode and low noise active mode, and the devices also provide latched push-pull output to wake up external MCU in sleeping mode. Two inputs of the SGM4823/SGM4826 allow two microphones to be multiplexed into one output.

The devices operate over an ambient temperature range of -40℃ to +85℃.

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FEATURES
  • Very Low Noise: 30nV/√Hz at 1kHz, Gain = 20dB

  • Very Low THD+N: 0.009%, Gain = 20dB

  • Wide Supply Voltage Range: 2.7V to 5.5V

  • Low Quiescent Current:

    4μA in Monitor Mode at VCC = 3.3V

    660μA in Active Mode

  • Low Noise Microphone Bias Voltage: 2.3V

  • Rail-to-Rail Outputs

  • 20dB Fixed-Gain

  • -40℃ to +85℃ Operating Temperature Range

APPLICATIONS

Laptop Computers

Smart Phones

Digital Cameras

VCRs

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SG Micro Corp (SGMICRO) specializes in the development, manufacturing and sales of high-performance and high-reliability integrated circuits for analog signal conditioning and system power management, offering innovative solutions to a broad range of applications in the industrial, automotive, communication, computing, consumer electronics, and medical equipment markets.
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Ordering Information
Part Number
StatusPackagePinsPd-Free
RoHS
REACH
Green
MSL RatingOperating Temperature RangeMaterial ContentReliability Report
Unit Resale Price*
(Volume Range: in USD)
Lead Time**
(Volume Range: Days)
SGM4825B-23YN6G/TR
Active
SOT-23-6
6
Yes
YesYesYesMSL3
-40℃ to +85℃
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1-24 units : $0.875/unit
25-99 units : $0.75/unit
100-249 units : $0.625/unit
250-499 units : $0.5/unit
500-999 units : $0.4375/unit
1000-9999 units : $0.325/unit
3K-9K : 14 days
10K-99K : 35 days
100K-999K : 70 days
1000K and above : 98 days

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.