LMV1031-20 Datasheet | National Semiconductor

Description The LMV1031 audio amplifier is an ideal replacement for the JFET preamplifier that is currently used in the electret microphones. The LMV1031 is optimized for applications that require extended battery life, such as Bluetooth munication links. The supply current for the LMV1031 is only 72 µA. .. This is a dramatic reduction from that required for a JFET equipped microphone. The LMV1031, with its separate output and supply pins, offers a higher PSRR and eliminates the need for additional external ponents. The LMV1031 is guaranteed to operate from 2V to 5V supply voltage over the full temperature range, has a fixed voltage gain of 20 d B and enhanced SNR performance. The LMV1031 is optimized for an output biasing of 1.09V. The LMV1031 has less than 200Ω of output impedance over the full audio bandwidth. The gain response of the LMV1031 is flat within the audio band and is stable over the temperature range. The LMV1031 is available in a large dome 4-bump ultra thin micro SMD package that can easily fit on the PCB inside the miniature microphone metal can (package). This package is designed for microphone PCBs requiring 1 kg adhesion criteria. Features (Typical LMV1031-20, 2V Supply; Unless Otherwise Noted) n Signal to noise ratio 62 d B n Output voltage noise (A-weighted) - 86 d BV n Low supply current 72 µA n Supply voltage 2V to 5V > 100 MΩ n Input impedance n Max input signal 108 m VPP n Output voltage 1.09V n Temperature range - 40˚C to 85˚C n Large Dome 4-Bump micro SMD package with improved adhesion technology. Applications n n n n Mobile munications - Bluetooth Accessory microphone products Cellular phones PDAs Block Diagram Electret Microphone 20150804 20150801 © 2005 National Semiconductor Corporation DS201508 .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note...