OUTPUT

GND

INPUT

- +

2.2k

2.2PF

VDD

-

+

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, RL = 2.2 kΩ,

form factor electret microphones. This 2-wire portfolio

C = 2.2

μF, VIN = 18 mVPP, 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.

2

All 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.