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LMV1012TP-25/NOPB 数据手册 - TI（德州仪器）
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TI（德州仪器）
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音频放大器
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DSBGA-4
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用于高增益麦克风的模拟前置放大器 IC 4-DSBGA
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LMV1012TP-25/NOPB数据手册
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OUTPUT
GND
INPUT
-
+
2.2k
2.2PF
V
DD
-
+
DIAPHRAGM
AIRGAP
BACKPLATE
ELECTRET
CONNECTOR
LMV1012
x
x
x
x
x
x
x
x
xxx
x
xx
xx
IC
LMV1012
www.ti.com
SNAS194H –NOVEMBER 2002–REVISED MAY 2013
LMV1012 Analog Series: Pre-Amplified IC's for High Gain 2-Wire Microphones
Check for Samples: LMV1012
1
FEATURES
DESCRIPTION
The LMV1012 is an audio amplifier series for small
2
• Typical LMV1012-15, 2.2V Supply, R
L
= 2.2 kΩ,
form factor electret microphones. This 2-wire portfolio
C = 2.2 μF, V
IN
= 18 mV
PP
, Unless Otherwise
is designed to replace the JFET amplifier currently
Specified
being used. The LMV1012 series is ideally suited for
• Supply Voltage: 2V - 5V
applications requiring high signal integrity in the
presence of ambient or RF noise, such as in cellular
• Supply Current: <180 μA
communications. The LMV1012 audio amplifiers are
• Signal to Noise Ratio (A-Weighted): 60 dB
specified to operate over a 2.2V to 5.0V supply
• Output Voltage Noise (A-Weighted): −89 dBV
voltage range with fixed gains of 7.8 dB, 15.6 dB,
• Total Harmonic Distortion: 0.09%
20.9 dB, and 23.8 dB. The devices offer excellent
THD, gain accuracy and temperature stability as
• Voltage Gain
compared to a JFET microphone.
– LMV1012-07: 7.8 dB
The LMV1012 series enables a two-pin electret
– LMV1012-15: 15.6 dB
microphone solution, which provides direct pin-to-pin
– LMV1012-20: 20.9 dB
compatibility with the existing JFET market.
– LMV1012-25: 23.8 dB
The devices are offered in extremely thin space
• Temperature Range: −40°C to 85°C
saving 4-bump DSBGA packages. The LMV1012XP
is designed for 1.0 mm canisters and thicker ECM
• Offered in 4-Bump DSBGA Packages
canisters. These extremely miniature packages are
designed for electret condenser microphones (ECM)
APPLICATIONS
form factor.
• Cellular Phones
• Headsets
• Mobile Communications
• Automotive Accessories
• PDAs
• Accessory Microphone Products
Schematic Diagram Built-In Gain Electret Microphone
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2002–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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