Product Summary

The LMV431AIMFX is an audio amplifier for 3-Wire Analog Electret Microphones. It is designed to replace the JFET preamp currently being used. The LMV431AIMFX is ideal for extended battery life applications, such as a Bluetooth communication link. The addition of a third pin to an electret microphone that incorporates an LMV1032 allows for a dramatic reduction in supply current as compared to the JFET equipped electret microphone. Microphone supply current is thus reduced to 60μA, assuring longer battery life. It is guaranteed for supply voltages from 1.7V to 5V, and has fixed voltage gains of 6 dB, 15dB and 25dB. The applications of the LMV431AIMFX include Mobile communications - Bluetooth, Automotive accessories, Cellular phones, PDAs, Accessory microphone products.

Parametrics

LMV431AIMFX absolute maximum ratings: (1) ESD Tolerance: Human Body Model 2500V, Machine Model 250V; (2) Supply Voltage: VDD - GND 5.5V.

Features

LMV431AIMFX features: (1)Output voltage noise (A-weighted): -89dBV; (2)Low supply current: 60μA; (3)Supply voltage: 1.7V to 5V; (4)PSRR: 70dB; (5)Signal to noise ratio: 61dB; (6)Input capacitance: 2pF; (7)Input impedance: ＞100MΩ; (8)Output impedance:＜200Ω; (9)Max input signal 170mVPP; (10)Temperature range: -40℃ to 85℃; (11) Large Dome 4-Bump micro SMD package with improved adhesion technology.

Diagrams

LMV431AIMFX block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LMV431AIMFX
LMV431AIMFX
National Semiconductor (TI)
Voltage & Current References
Data Sheet
0-3000: $0.17
3000-6000: $0.16
6000-12000: $0.15
LMV431AIMFX/NOPB
LMV431AIMFX/NOPB
National Semiconductor (TI)
Voltage & Current References
Data Sheet
0-1: $0.46
1-25: $0.36
25-100: $0.32
100-250: $0.27