Datasheet > LMV1024_09

LMV1024_09

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		放大器光电二极管
页数	文件大小	规格书
18页	555K
描述
PDM Output with Pre-Amplifier for Electret Microphones

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LMV1024_09 数据手册

OBSOLETE

July 20, 2009

LMV1024/LMV1026 (Stereo)

PDM Output with Pre-Amplifier for Electret Microphones

General Description

Features

National’s LMV1024 and LMV1026 stereo amplifiers are so-

lutions for the new generation of voice enrichment capabili-

ties. 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)

Enhanced high-performance, full PDM output from the el-

ement

■

Stereo chipset and array routing

SNR A-weighted

Digital A-weighted noise floor

Supply current

Clock frequency

Total harmonic distortion

Power supply rejection ratio

Adhesion technology >1 kg

Highly integrated stereo or mono signaling

Maximized system performance

Reduced components and layout

RF (buzz noise) managed with 4 wire signaling

Thinnest 0.35 mm micro SMD packaging

■

Each 20 kHz preamplifier drives a Pulse Density Modulated

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

satility. 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.

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. Using

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

or stereo and multi-array applications.

Applications

Digital output audio subsystems and stereo arrays

■

Electret condenser microphones with all digital output

Portable communications and small form factor

National’s 518uA circuits deliver stereo portability with audio

quality bandwidth. These solutions enable rapid system eval-

uation and enhance consumer satisfaction. National provides

the LMV1024 and LMV1026 in 6-bump micro SMD packages

with 1 kg adhesion properties.

Digital audio computing or voice security

Automotive or array systems

Headphone and Headset accessories

Typical Application

20133475

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

201334

www.national.com

201334 Version 3 Revision 4 Print Date/Time: 2009/07/20 17:12:49

12 3 4 5 6 7...18

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与LMV1024_09相关器件

型号	品牌	获取价格	描述	数据表
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
LMV1031	TI	获取价格	Amplifier for Internal 3-Wire Analog Microphones and External Preamplifier

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