National LMV1012 Analog Series Data Handbook/Manual
Summary
The LMV1012 series is an advanced, low-noise audio amplifier IC designed specifically for maximizing signal integrity from 2-wire electromicrophones. Featuring high-gain options and a fixed operating voltage of 2V to 5V, this device ensures superior performance in challenging environments like cellular communication or mobile devices. This technical manual provides comprehensive specifications, electrical characteristics, and compatibility data necessary for engineers designing miniature consumer electronics, including headsets, automotive systems, and PDAs.
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LMV1012 Analog Series: Pre-Amplified IC’s for High Gain 2-Wire Microphones General Description Features The LMV1012 is an audio amplifier series for small form (Typical LMV1012-15, 2.2V supply, RL 2.2 kΩ, 2.2 µF,
factor electret microphones. This 2-wire portfolio is designed VIN m VPP, unless otherwise specified)
to replace the JFET amplifier currently being used. The Supply voltage 2V 5V LMV1012 series is ideally suited for applications requiring <180
Supply current µA
high signal integrity in the presence of ambient or RF noise,
Signal to noise ratio (A-weighted) d B
such as in cellular communications. The LMV1012 audio
Output voltage noise (A-weighted) −89 d BV
amplifiers are guaranteed to operate over 2.2V to 5.0V
Total harmonic distortion 0.09%
supply voltage range with fixed gains of 7.8 d B, 15.6 d B,
Voltage gain
20.9 d B, and 23.8 d B. The devices offer excellent THD, gain
LMV1012-07 7.8 d B
accuracy and temperature stability as compared to JFET
LMV1012-15 15.6 d B
microphone.
LMV1012-20 20.9 d B
The LMV1012 series enables two-pin electret microphone
LMV1012-25 23.8 d B
solution, which provides direct pin-to-pin compatibility with
Temperature range −40˚C to 85˚C
the existing JFET market.
Offered in 4-bump micro SMD packages
The devices are offered in extremely thin space saving 4-bump micro SMD packages. The LMV1012XP is designed
Applications
for 1.0 mm canisters and thicker ECM canisters. These
extremely miniature packages are designed for electret con- Cellular phones
denser microphones (ECM) form factor. Headsets
Mobile communications Automotive accessories PDAs Accessory microphone products
Schematic Diagram Built-In Gain Electret Microphone
National Semiconductor Corporation DS200587 www.national.com
Page Summary Contents For National LMV1012 Analog Series Data Handbook/Manual
Manual Details
| Brand | National |
|---|---|
| Pages | 15 |
| File Size | 484.04 KB |
| Published | June 02, 2026 |
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Frequently Asked Questions
Does the LMV1012 connect easily to existing equipment?
Yes, it provides direct pin-to-pin compatibility with the existing JFET microphone market.
What is the typical Signal-to-Noise Ratio (SNR)?
The SNR is rated at 60 dB for the LMV1012-15 microphone type.
What are the temperature and supply voltage limits?
It operates in a temperature range of -40˚C to 85˚C and accepts a supply voltage between 2V and 5V.
What form factor is best suited for compact devices?
The LMV1012 is offered in extremely thin space saving 4-bump micro SMD packages, ideal for ECM canisters.