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參數(shù)資料
| 型號： | LMV1026URX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | PDM Output with Pre-Amplifier for Electret Microphones |
| 中文描述： | 2 CHANNEL, AUDIO AMPLIFIER, PBGA6 |
| 封裝： | 0.35 MM, LEAD FREE, MICRO SMD-6 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 560K |
| 代理商： | LMV1026URX |
LMV1024/LMV1026 (Stereo)
OBSOLETE
July 20, 2009
PDM Output with Pre-Amplifier for Electret Microphones
General Description
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.
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.
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.
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.
Features
(Typical V
DD = 1.8V, CLOCK = 1.2 MHz, fINPUT = 1 kHz,
V
INPUT = 18 mVPP, unless otherwise specified)
■ Enhanced high-performance, full PDM output from the el-
ement
■ Stereo chipset and array routing
■ SNR A-weighted
59 dB
■ Digital A-weighted noise floor
89 dBFS
■ Supply current
518 A
■ Clock frequency
400 kHz to 2.4 MHz
■ Total harmonic distortion
0.03%
■ Power supply rejection ratio
100 dB
■ 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
Applications
■ Digital output audio subsystems and stereo arrays
■ Electret condenser microphones with all digital output
■ Portable communications and small form factor
■ 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.
2009 National Semiconductor Corporation
201334
www.national.com
201334 Version 3 Revision 4
Print Date/Time: 2009/07/20 17:12:49
LMV1024/LMV1026
PDM
Output
with
Pre-Amplifier
for
Electret
Microphones
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| LMV102M5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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