The LMV1032s are an audio amplifier series for small form factor electret microphones. They are designed to replace the JFET preamp currently being used. The LMV1032 series is ideal for extended battery life applications, such as a Bluetooth communication link. The addition of a third pin to an electret microphones 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 60 µA, assuring longer battery life. The LMV1032 series is specified for supply voltages from 1.7V to 5V, and has fixed voltage gains of 6 dB, 15 dB and 25 dB.

The LMV1032 series offers low output impedance over the voice bandwidth, excellent power supply rejection (PSRR), and stability over temperature.

The devices are offered in space saving 4-bump ultra thin DSBGA lead free packages and are thus ideally suited for the form factor of miniature electret microphone packages. These extremely miniature packages have the Large Dome Bump (LDB) technology. This DSBGA technology is designed for microphone PCBs requiring 1 kg adhesion criteria.

• (Typical LMV1032-15, 1.7V Supply; Unless Otherwise Noted)
• Output Voltage Noise (A-weighted) −89 dBV
• Low Supply Current 60 μA
• Supply Voltage 1.7V to 5V
• PSRR 70 dB
• Signal to Noise Ratio 61 dB
• Input Capacitance 2 pF
• Input Impedance >100 M?
• Output Impedance <200?
• Max Input Signal 170 mVPP
• Temperature Range −40°C to 85°C
• Large Dome 4-Bump DSBGA Package with Improved Adhesion Technology.