TLV1018-15YDCR

Overview

The TLV1018-15YDCR is an audio amplifier designed for three-wire analog electret microphones. It operates within a supply voltage range of 1.7 V to 5 V and features a fixed gain of 15 dB. The device draws a typical supply current of 70 μA, ensuring extended battery life in mobile applications. Electrical characteristics include a signal-to-noise ratio of 61 dB, power-supply rejection ratio of 70 dB, and output impedance below 100 Ω. It is characterized for operation over a free-air temperature range of –40 °C to 85 °C.

Feature Summary

• Ultra-low supply current consumption optimized for always-on microphone applications
• Integrated A-weighted filter improves signal-to-noise ratio correlation with human hearing perception
• Low output impedance reduces sensitivity to RF noise pick-up and AM demodulation artifacts
• Built-in low-frequency cut-off filter mitigates wind, handling noise, and proximity effect distortion

Applications

• Mobile communications devices including cellular phones
• Bluetooth communication links and accessories
• Personal digital assistants (PDAs)
• Accessory microphone products

Procurement Notes

Verify the production status of this component before design finalization. The datasheet indicates the part may be obsolete or discontinued. Confirm availability through official Texas Instruments channels or authorized distributors. Ensure the YDC package marking matches the required specifications for your assembly process.

Selection Notes

Select the TLV1018-15YDCR when a fixed 15 dB gain is required for small-form-factor electret microphones. This model replaces traditional JFET preamplifiers to reduce supply current significantly. Consider the 25 dB variant if higher amplification is necessary. The ultra-thin lead-free package fits directly into miniature microphone cans.

Part Context

This component belongs to the TLV1018 family of audio amplifiers specifically engineered for three-wire analog electret condenser microphones. The family includes variants with different fixed gains, such as the TLV1018-25YDCR. These devices are designed to integrate directly into microphone packages, replacing standard JFETs to improve power efficiency and acoustic performance in portable electronics.

Replacement Considerations

The TLV1018-25YDCR serves as a functional substitute within the same family, offering a fixed gain of 25 dB instead of 15 dB while maintaining identical pinout and package dimensions.