Datasheet > SGM4822

SGM4822

更新时间： 2023-09-03 20:24:54

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
15页	752K
描述
Single/Dual-Input, Fixed-Gain Microphone Amplifier with Integrated Bias

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SGM4822 数据手册

SGM4822/SGM4823/SGM4825/SGM4826

Single/Dual-Input, Fixed-Gain

Microphone Amplifiers with Integrated Bias

GENERAL DESCRIPTION

FEATURES

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

voltagefrom 2.7Vto5.5V. 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.

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

√

● Very Low THD+N: 0.009%, Gain = 20dB

● Wide Supply Voltage Range:

3.3V to 5.5V (SGM4822/SGM4823)

2.7V to 5.5V (SGM4825/SGM4826)

● Low Quiescent Current:



0.1µA in Forced Shutdown Mode

(SGM4822/SGM4823)



4µA in Monitor Mode at V_CC= 3.3V

660μA in Active Mode

● Low Noise Microphone Bias Voltage: 2.3V

● Rail-to-Rail Outputs

● 20dB Fixed-Gain

● Automatic Switching between Low Power

Monitor Mode and Low Noise Active Mode

(SGM4822/SGM4823)

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.

● Latched Push-Pull Output to Wake Up External

MCU in Sleeping Mode (SGM4822/SGM4823)

● -40℃ to +85℃ Operating Temperature Range

The devices operate over an ambient temperature

range of -40℃ to+85℃.

APPLICATIONS

Laptop Computers

Smart Phones

Digital Cameras

VCRs

SG Micro Corp

SEPTEMBER 2018 – REV. A

www.sg-micro.com

12 3 4 5 6 7...15

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