Datasheet > LMV1089RL

LMV1089RL

更新时间： 2024-11-21 05:42:27

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
32页	1644K
描述
Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Capability

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LMV1089RL 数据手册

May 19, 2010

LMV1089

Dual Input, Far Field Noise Suppression Microphone

Amplifier with Automatic Calibration Capability

General Description

Key Specifications

The LMV1089 is a fully analog dual differential input, differ-

ential output, microphone array amplifier designed to reduce

background acoustic noise, while delivering superb speech

clarity in voice communication applications.

■ꢀFar Field Noise Suppression

(Electrical), (f = 1kHz)

37dB

2.7V to 5.5V

1.1mA (typ)

0.7µA (typ)

65dB (typ)

0.1% (typ)

96dB (typ)

■ꢀSupply Voltage

■ꢀSupply Current

■ꢀStandby Current

■ꢀSignal-to-Noise Ratio (A-weighted)

■ꢀTotal Harmonic Distortion + Noise

■ꢀPSRR (217Hz)

The LMV1089 preserves near-field voice signals within 4cm

of the microphones while rejecting far-field acoustic noise

greater than 50cm from the microphones. Up to 20dB of far-

field rejection is possible in a properly configured and cali-

brated system.

Part of the Powerwise™ family of energy efficient solutions,

the LMV1089 consumes only 1.1mA of supply current pro-

viding superior performance over DSP solutions consuming

greater than ten times the power.

Features

A quick calibration during the manufacturing test process of

the product containing the LMV1089 compensates the entire

microphone system. This calibration compensates for mis-

match in microphone gain and frequency response, as well

as acoustical path variances. The LMV1089 stores the cali-

bration coefficients in the on-chip EEPROM. The calibration

is initiated by an I²C command or by a logic pin control.

Low power consumption

■

Shutdown function

No added processing delay

Differential inputs and outputs

Automatic calibration

Adjustable 6 - 48dB gain

The dual microphone inputs and the processed signal output

are differential to provide excellent noise immunity. The mi-

crophones are biased with an internal low-noise bias supply.

Excellent RF immunity

Space-saving 36–bump micro SMD package

Applications

Headset and Boom microphones

■

Mobile handsets and two-way radios

Bluetooth and other powered headsets

Hand-held voice microphones

Equalized stereo microphone preamplifier

■

30047240

FIGURE 1.

300472

www.national.com

12 3 4 5 6 7...32

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与LMV1089RL相关器件

型号	品牌	获取价格	描述	数据表
LMV1089RLX	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Ca
LMV1089VY	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Ca
LMV1089VYX	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Ca
LMV1089VYX/NOPB	TI	获取价格	Dual Input, Far Field Noise Suppression Mic Amp w/ Auto Calibration Capability 32-LQFP -40
LMV1090	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier
LMV1090TL	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier
LMV1090TLX	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier
LMV1091	TI	获取价格	具有噪声抑制功能的双输入麦克风前置放大器
LMV1091	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier
LMV1091TM	NSC	获取价格	Dual Input, Far Field Noise Suppression Microphone Amplifier

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