LMV1031 Series

Analog input microphone preamplifier for 3-wire electret microphones with fixed 20 dB gain

Catalog

Analog input microphone preamplifier for 3-wire electret microphones with fixed 20 dB gain

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Features	Supplier Device Package	Package / Case	Type
Texas Instruments LMV1031UR-20/NOPB	5 V	2 V	1-Channel (Mono)	85 °C	-40 °C	Surface Mount	Microphone	4-DSBGA	4-XFBGA DSBGA	Class AB

Catalog

Analog input microphone preamplifier for 3-wire electret microphones with fixed 20 dB gain

Key Features

• (Typical LMV1031-20, 2V Supply; Unless Otherwise Noted)Signal to Noise Ratio 62 dBOutput Voltage Noise (A-Weighted) −86 dBVLow Supply Current 72 μASupply Voltage 2V to 5VInput Impedance >100 MΩMax Input Signal 108 mVPPOutput Voltage 1.09VTemperature Range −40°C to 85°CLarge Dome 4-Bump DSBGA Package with Improved Adhesion TechnologyAll trademarks are the property of their respective owners.(Typical LMV1031-20, 2V Supply; Unless Otherwise Noted)Signal to Noise Ratio 62 dBOutput Voltage Noise (A-Weighted) −86 dBVLow Supply Current 72 μASupply Voltage 2V to 5VInput Impedance >100 MΩMax Input Signal 108 mVPPOutput Voltage 1.09VTemperature Range −40°C to 85°CLarge Dome 4-Bump DSBGA Package with Improved Adhesion TechnologyAll trademarks are the property of their respective owners.

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 communication 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 components. The LMV1031 is ensured to operate from 2V to 5V supply voltage over the full temperature range, has a fixed voltage gain of 20 dB 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 DSBGA 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. 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 communication 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 components. The LMV1031 is ensured to operate from 2V to 5V supply voltage over the full temperature range, has a fixed voltage gain of 20 dB 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 DSBGA 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.