Datasheet Texas Instruments LMV1031URX-20/NOPB — Datenblatt

LMV1031
www.ti.com SNOSAP8B – SEPTEMBER 2005 – REVISED MAY 2013 LMV1031-20 Amplifier for Internal 3-Wire Analog Microphones and External Preamplifier
Check for Samples: LMV1031 FEATURES 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 ОјA. 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. 1 2 (Typical LMV1031-20, 2V Supply; Unless
Otherwise Noted)
Signal to Noise Ratio 62 dB
Output Voltage Noise (A-Weighted) -86 dBV
Low Supply Current 72 ОјA
Supply Voltage 2V to 5V
Input Impedance >100 MΩ
Max Input Signal 108 mVPP
Output Voltage 1.09V
Temperature Range -40В°C to 85В°C
Large Dome 4-Bump DSBGA Package with
Improved Adhesion Technology The LMV1031 has less than 200Ω of output …