LMV1024

更新时间： 2024-11-18 04:19:59

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器光电二极管
页数	文件大小	规格书
17页	1141K
描述
PDM Output with Pre-Amplifier for Electret Microphones

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LMV1024 数据手册

November 2005

LMV1024/LMV1026 (Stereo)

PDM Output with Pre-Amplifier for Electret Microphones

General Description

Features

National’s LMV1024 and LMV1026 stereo amplifiers are

solutions for the new generation of voice enrichment capa-

bilities. National has integrated sigma delta modulation and

analog cores to improve the voice quality and the perfor-

mance and to support designer’s choices.

(Typical V_DD= 1.8V, CLOCK = 1.2 MHz, f_INPUT= 1 kHz,

V_INPUT= 18 mV_PP, unless otherwise specified)

n Enhanced high-performance, full PDM output from the

element

n Stereo chipset and array routing

Each 20 kHz preamplifier drives a Pulse Density Modulated

(PDM) signal at an over sampled 60 bit stream, offering

versatility. These solutions provide immediate conversion to

high performance audio spectrum, thus completing a high

quality audio system. The LMV1024 and LMV1026 operate

from 1.6V to 3V.

n SNR A-weighted

n Digital A-weighted noise floor

n Supply current

n Clock frequency

n Total harmonic distortion

n Power supply rejection ratio

n Adhesion technology 1 kg

n Highly integrated stereo or mono signaling

n Maximized system performance

n Reduced components and layout

n RF (buzz noise) managed with 4 wire signaling

n Thinnest 0.35 mm micro SMD packaging

59 dB

−89 dBFS

518 µA

400 kHz to 2.4 MHz

0.03%

100 dB

National’s new adjustable clock frequency technology is de-

signed for stereo, performance and ease of use. The stereo

function is either a rising or falling edge clock command. The

high drive, robust PDM signal directly from an ECM (Electret

Condenser Microphone), upgrades existing lower quality,

low-level signal constraints.

These advanced mixed signal preamplifiers cleanly, accu-

rately and creatively eliminate older, poorer quality systems,

which restricted performance and versatility. The 4-wire

PDM signaling reduces RF noise and simplifies layout. Us-

ing National’s PDM solutions is the choice for higher quality

mono or stereo and multi-array applications.

Applications

n Digital output audio subsystems and stereo arrays

n Electret condenser microphones with all digital output

n Portable communications and small form factor

n Digital audio computing or voice security

n Automotive or array systems

National’s 518uA circuits deliver stereo portability with audio

quality bandwidth. These solutions enable rapid system

evaluation and enhance consumer satisfaction. National pro-

vides the LMV1024 and LMV1026 in 6-bump micro SMD

packages with 1 kg adhesion properties.

n Headphone and Headset accessories

Typical Application

20133475

For a stereo application, see STEREO OPERATION in the Application Section.

DS201334

www.national.com

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与LMV1024相关器件

型号	品牌	获取价格	描述	数据表
LMV1024_09	NSC	获取价格	PDM Output with Pre-Amplifier for Electret Microphones
LMV1024UR	NSC	获取价格	PDM Output with Pre-Amplifier for Electret Microphones
LMV1024URX	NSC	获取价格	PDM Output with Pre-Amplifier for Electret Microphones
LMV1026	NSC	获取价格	PDM Output with Pre-Amplifier for Electret Microphones
LMV1026UR	NSC	获取价格	PDM Output with Pre-Amplifier for Electret Microphones
LMV1026URX	NSC	获取价格	PDM Output with Pre-Amplifier for Electret Microphones
LMV102M5	NSC	获取价格	Fixed-Gain Amplifiers
LMV102M5X	NSC	获取价格	Fixed-Gain Amplifiers
LMV102M7	NSC	获取价格	Fixed-Gain Amplifiers
LMV102M7X	NSC	获取价格	Fixed-Gain Amplifiers

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